1
|
Li C, Gui S, Zhang Y. Compare the safety and efficacy of endoscopic third ventriculostomy and ventriculoperitoneal shunt placement in infants and children with hydrocephalus: a systematic review and meta-analysis. Int J Neurosci 2024; 134:1-10. [PMID: 28697664 DOI: 10.1080/00207454.2017.1348352] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Accepted: 06/24/2017] [Indexed: 10/19/2022]
Abstract
PURPOSE Endoscopic third ventriculostomy (ETV) and ventriculoperitoneal shunt placement are two surgical options used for treatment of non-communicating hydrocephalus. The purpose of this study was to compare the efficiency and safety of these techniques in pediatric patients. MATERIALS AND METHODS An extensive literature review regarding the clinical outcome, safety and efficiency of ETV and shunting in treatment of hydrocephalus was conducted in Medline, PubMed, Cochrane and Google Scholar databases up to 27 November 2015. Patient demographics, ETV and shunting success and failure rates were extracted. RESULTS A total of seven two-arm studies were included for quantitative analysis and 25 single-arm studies were included for systematic review. The two-arm studies recruited a total of 6995 patients: 1046 in the ETV group and 5949 in the shunt group. The pooled results showed that the 1 year success rate of ETV and shunt-placement procedure were similar (pooled RR = 0.870, 95% CI = 0.680-1.112, P = 0.266). The failure rate in the ETV treatment group was 0.9 times higher than in the shunt group; however, the results did not reach statistical significance (pooled RR = 0.893, 95% CI = 0.576-1.383, P = 0.611). CONCLUSIONS Both ETV and shunts are associated with similar 1 year success and failure rates. Therefore, there are no current indications to recommend one mode of treatment over the other. Future studies designed to assess the effectiveness of ETV and shunt procedures depending on patient's age and etiology are warranted.
Collapse
Affiliation(s)
- Chuzhong Li
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
- Beijing Institute for Brain Disorders Brain Tumor Center, Beijing, China
- China National Clinical Research Center for Neurological Diseases, Beijing, China
| | - Songbai Gui
- Department of Neurosurgery, Beijing Tiantan Hospital affiliated to Capital Medical University, Beijing, China
| | - Yazhuo Zhang
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
- Beijing Institute for Brain Disorders Brain Tumor Center, Beijing, China
- China National Clinical Research Center for Neurological Diseases, Beijing, China
| |
Collapse
|
2
|
Black H, Succop B, Stuebe CM, Torres A, Caddell A, Quinsey C. Low surgical weight associated with ETV failure in pediatric hydrocephalus patients. Neurosurg Rev 2024; 47:176. [PMID: 38644441 DOI: 10.1007/s10143-024-02423-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 04/10/2024] [Accepted: 04/16/2024] [Indexed: 04/23/2024]
Abstract
The use of endoscopic third ventriculostomy (ETV) for treatment of pediatric hydrocephalus has higher failure rates in younger patients. Here we investigate the impact of select perioperative variables, specifically gestational age, chronological age, birth weight, and surgical weight, on ETV failure rates. A retrospective review was performed on patients treated with ETV - with or without choroid plexus cauterization (CPC) - from 2010 to 2021 at a large academic center. Analyses included Cox regression for independent predictors and Kaplan-Meier survival curves for time to-event outcomes. In total, 47 patients were treated with ETV; of these, 31 received adjunctive CPC. Overall, 66% of the cohort experienced ETV failure with a median failure of 36 days postoperatively. Patients aged < 6 months at time of surgery experienced 80% failure rate, and those > 6 months at time of surgery experienced a 41% failure rate. Univariate Cox regression analysis showed weight at the time of ETV surgery was significantly inversely associated with ETV failure with a hazard ratio of 0.92 (95% CI 0.82, 0.99). Multivariate analysis redemonstrated the inverse association of weight at time of surgery with ETV failure with hazard ratio of 0.76 (95% CI 0.60, 0.92), and sensitivity analysis showed < 4.9 kg as the optimal cutoff predicting ETV/CPC failure. Neither chronologic age nor gestational age were found to be significantly associated with ETV failure.In this study, younger patients experienced higher ETV failure rates, but multivariate regression found that weight was a more robust predictor of ETV failure than chronologic age or gestational age, with an optimal cutoff of 4.9 kg in our small cohort. Given the limited sample size, further study is needed to elucidate the independent role of weight as a peri-operative variable in determining ETV candidacy in young infants. Previous presentations: Poster Presentation, Congress of Neurological Surgeons.
Collapse
Affiliation(s)
- Hannah Black
- School of Medicine, University of North Carolina - Chapel Hill, Chapel Hill, NC, USA
| | - Benjamin Succop
- School of Medicine, University of North Carolina - Chapel Hill, Chapel Hill, NC, USA.
| | | | - Andrea Torres
- Department of Neurosurgery, University of North Carolina - Chapel Hill, Chapel Hill, NC, USA
| | - Andrew Caddell
- School of Medicine, University of North Carolina - Chapel Hill, Chapel Hill, NC, USA
| | - Carolyn Quinsey
- Department of Neurosurgery, University of North Carolina - Chapel Hill, Chapel Hill, NC, USA
| |
Collapse
|
3
|
Waterstraat MG, Dehghan A, Gholampour S. Optimization of number and range of shunt valve performance levels in infant hydrocephalus: a machine learning analysis. Front Bioeng Biotechnol 2024; 12:1352490. [PMID: 38562668 PMCID: PMC10982383 DOI: 10.3389/fbioe.2024.1352490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Accepted: 02/13/2024] [Indexed: 04/04/2024] Open
Abstract
Shunt surgery is the main treatment modality for hydrocephalus, the leading cause of brain surgery in children. The efficacy of shunt surgery, particularly in infant hydrocephalus, continues to present serious challenges in achieving improved outcomes. The crucial role of correct adjustments of valve performance levels in shunt outcomes has been underscored. However, there are discrepancies in the performance levels of valves from different companies. This study aims to address this concern by optimizing both the number and range of valve performance levels for infant hydrocephalus, aiming for improved shunt surgery outcomes. We conducted a single-center cohort study encompassing infant hydrocephalus cases that underwent initial shunt surgery without subsequent failure or unimproved outcomes. An unsupervised hierarchical machine learning method was utilized for clustering and reporting the valve drainage pressure values for all patients within each identified cluster. The optimal number of clusters corresponds to the number of valve performance levels, with the valve drainage pressure ranges within each cluster indicating the pressure range for each performance level. Comparisons based on the Silhouette coefficient between 3-7 clusters revealed that this coefficient for the 4-cluster (4-performance level) was at least 28.3% higher than that of other cluster formations in terms of intra-cluster similarity. The Davies-Bouldin index for the 4-performance level was at least 37.2% lower than that of other configurations in terms of inter-cluster dissimilarity. Cluster stability, indicated by a Jaccard index of 71% for the 4-performance level valve, validated the robustness, reliability, and repeatability of our findings. Our suggested optimized drainage pressure ranges for each performance level (1.5-5.0, 5.0-9.0, 9.0-15.0, and 15.0-18.0 cm H2O) may potentially assist neurosurgeons in improving clinical outcomes for patients with shunted infantile hydrocephalus.
Collapse
Affiliation(s)
| | | | - Seifollah Gholampour
- Department of Neurological Surgery, University of Chicago, Chicago, IL, United States
| |
Collapse
|
4
|
Seltzer LA, Couldwell MW, Tubbs RS, Bui CJ, Dumont AS. The Top 100 Most Cited Journal Articles on Hydrocephalus. Cureus 2024; 16:e54481. [PMID: 38510885 PMCID: PMC10954317 DOI: 10.7759/cureus.54481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/19/2024] [Indexed: 03/22/2024] Open
Abstract
Hydrocephalus represents a significant burden of disease, with more than 383,000 new cases annually worldwide. When the magnitude of this condition is considered, a centralized archive of pertinent literature is of great clinical value. From a neurosurgical standpoint, hydrocephalus is one of the most frequently treated conditions in the field. The focus of this study was to identify the top 100 journal articles specific to hydrocephalus using bibliometric analysis. Using the Journal of Citation Report database, 10 journals were identified. The Web of Science Core Collection was then searched using each journal name and the search term "hydrocephalus." The results were ordered by "Times Cited" and searched by the number of citations. The database contained journal articles from 1976 to 2021, and the following variables were collected for analysis: journal, article type, year of publication, and the number of citations. Journal articles were excluded if they had no relation to hydrocephalus, mostly involved basic science research, or included animal studies. Ten journals were identified using the above criteria, and a catalog of the 100 most cited publications in the hydrocephalus literature was created. Articles were arranged from highest to lowest citation number, with further classification by journal, article type, and publication year. Of the 100 articles referenced, 38 were review articles, 24 were original articles, 15 were comparative studies, 11 were clinical trials, six were multi-center studies, three were cross-sectional, and three were case reports with reviews. Articles were also sorted by study type and further stratified by etiology. If the etiology was not specified, studies were instead subcategorized by treatment type. Etiologies such as aqueductal stenosis, tumors, and other obstructive causes of hydrocephalus were classified as obstructive (n=6). Communicating (n=15) included idiopathic, normal pressure hydrocephalus, and other non-obstructive etiologies. The category "other" (n=3) was assigned to studies that included etiologies, populations, and/or treatments that did not fit into the classifications previously outlined. Through our analysis of highly cited journal articles focusing on different etiologies and the surgical or medical management of hydrocephalus, we hope to elucidate important trends. By establishing the 100 most cited hydrocephalus articles, we contribute one source, stratified for efficient referencing, to facilitate clinical care and future research on hydrocephalus.
Collapse
Affiliation(s)
- Laurel A Seltzer
- Department of Neurosurgery, Tulane University School of Medicine, New Orleans, USA
| | - Mitchell W Couldwell
- Department of Neurosurgery, Tulane University School of Medicine, New Orleans, USA
| | - R Shane Tubbs
- Department of Anatomical Sciences, St. George's University, St. George's, GRD
- Department of Neurosurgery, Tulane University School of Medicine, New Orleans, USA
- Department of Neurosurgery and Ochsner Neuroscience Institute, Ochsner Health System, New Orleans, USA
- Department of Structural Biology, Tulane University School of Medicine, New Orleans, USA
| | - C J Bui
- Department of Neurosurgery and Ochsner Neuroscience Institute, Ochsner Health System, New Orleans, USA
| | - Aaron S Dumont
- Department of Neurosurgery, Tulane University School of Medicine, New Orleans, USA
| |
Collapse
|
5
|
Zhang M, Ming Y, Du Y, Xin Z. Two-sample Mendelian randomization study does not reveal a significant relationship between cytomegalovirus (CMV) infection and autism spectrum disorder. BMC Psychiatry 2023; 23:559. [PMID: 37533011 PMCID: PMC10394766 DOI: 10.1186/s12888-023-05035-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Accepted: 07/18/2023] [Indexed: 08/04/2023] Open
Abstract
BACKGROUND Autism spectrum disorder (ASD) is a neurodevelopmental disorder affecting ~ 2% of children worldwide and is characterized by repetitive, stereotypical behaviours and impaired expressive communication. Cytomegalovirus (CMV) is considered a risk factor for ASD; however, published studies are usually limited by covering too few events and have different conclusions, indicating that the relationship between CMV infection and ASD remains elusive. METHODS To investigate the association between CMV infection and ASD, we conducted this 2-sample Mendelian randomization (MR) study using genome-wide association studies (GWAS) summary data from FinnGen and the IEU Open GWAS project. RESULTS Our results showed no significant relationship between all 3 CMV infections (unspecified cytomegaloviral diseases, anti-CMV IgG levels, and maternal CMV) and ASD. CONCLUSIONS Our results indicate that CMV infection does not significantly increase ASD risk. These results show that the relationship between CMV infection and ASD remains elusive and needs to be further clarified.
Collapse
Affiliation(s)
- Mengna Zhang
- Molecular Diagnosis Center, The Affiliated Hospital of Chengde Medical University, Chengde, HeBei Province, 067000, China.
| | - Ying Ming
- Molecular Diagnosis Center, The Affiliated Hospital of Chengde Medical University, Chengde, HeBei Province, 067000, China
| | - Yunling Du
- Molecular Diagnosis Center, The Affiliated Hospital of Chengde Medical University, Chengde, HeBei Province, 067000, China
| | - Ziyuan Xin
- Molecular Diagnosis Center, The Affiliated Hospital of Chengde Medical University, Chengde, HeBei Province, 067000, China
| |
Collapse
|
6
|
Roach JT, Shlobin NA, Andrews JM, Baticulon RE, Campos DA, Moreira DC, Qaddoumi I, Boop FA. The Greatest Healthcare Disparity: Addressing Inequities in the Treatment of Childhood Central Nervous System Tumors in Low- and Middle-Income Countries. Adv Tech Stand Neurosurg 2023; 48:1-19. [PMID: 37770679 DOI: 10.1007/978-3-031-36785-4_1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/30/2023]
Abstract
The antithesis between childhood cancer survival rates in low- and middle-income countries (LMIC) and high-income countries (HIC) represents one of healthcare's most significant disparities. In HICs, the 5-year survival rate for children with cancer, including most brain tumors, exceeds 80%. Unfortunately, children in LMICs experience far worse outcomes with 5-year survival rates as low as 20%. To address inequities in the treatment of childhood cancer and disease burden globally, the World Health Organization (WHO) launched the Global Initiative for Childhood Cancer. Within this initiative, pediatric low-grade glioma (LGG) represents a unique opportunity for the neurosurgical community to directly contribute to a paradigm shift in the survival outcomes of children in LMICs, as many of these tumors can be managed with surgical resection alone. In this chapter, we discuss the burden of pediatric LGG and outline actions the neurosurgical community might consider to improve survival for children with LGG in LMICs.
Collapse
Affiliation(s)
- Jordan T Roach
- Graduate School of Biomedical Sciences, St. Jude Children's Research Hospital, Memphis, TN, USA
- College of Medicine, University of Tennessee Health Science Center, Memphis, TN, USA
- Division of Brain Tumor Research, Department of Developmental Neurobiology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Nathan A Shlobin
- Department of Neurological Surgery, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Jared M Andrews
- Division of Brain Tumor Research, Department of Developmental Neurobiology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Ronnie E Baticulon
- Division of Neurosurgery, Department of Neurosciences, Philippine General Hospital, University of the Philippines Manila, Manila, Philippines
| | - Danny A Campos
- Instituto Nacional de Salud del Niño San Borja, Lima, Peru
| | - Daniel C Moreira
- Department of Global Pediatric Medicine, St. Jude Children's Research Hospital, Memphis, TN, USA
- Department of Oncology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Ibrahim Qaddoumi
- Department of Global Pediatric Medicine, St. Jude Children's Research Hospital, Memphis, TN, USA
- Department of Oncology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Frederick A Boop
- Department of Global Pediatric Medicine, St. Jude Children's Research Hospital, Memphis, TN, USA
- Department of Neurosurgery, University of Tennessee Health Science Center, Memphis, TN, USA
| |
Collapse
|
7
|
Type IV Pili Are a Critical Virulence Factor in Clinical Isolates of Paenibacillus thiaminolyticus. mBio 2022; 13:e0268822. [PMID: 36374038 PMCID: PMC9765702 DOI: 10.1128/mbio.02688-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Hydrocephalus, the leading indication for childhood neurosurgery worldwide, is particularly prevalent in low- and middle-income countries. Hydrocephalus preceded by an infection, or postinfectious hydrocephalus, accounts for up to 60% of hydrocephalus in these areas. Since many children with hydrocephalus suffer poor long-term outcomes despite surgical intervention, prevention of hydrocephalus remains paramount. Our previous studies implicated a novel bacterial pathogen, Paenibacillus thiaminolyticus, as a causal agent of neonatal sepsis and postinfectious hydrocephalus in Uganda. Here, we report the isolation of three P. thiaminolyticus strains, Mbale, Mbale2, and Mbale3, from patients with postinfectious hydrocephalus. We constructed complete genome assemblies of the clinical isolates as well as the nonpathogenic P. thiaminolyticus reference strain and performed comparative genomic and proteomic analyses to identify potential virulence factors. All three isolates carry a unique beta-lactamase gene, and two of the three isolates exhibit resistance in culture to the beta-lactam antibiotics penicillin and ampicillin. In addition, a cluster of genes carried on a mobile genetic element that encodes a putative type IV pilus operon is present in all three clinical isolates but absent in the reference strain. CRISPR-mediated deletion of the gene cluster substantially reduced the virulence of the Mbale strain in mice. Comparative proteogenomic analysis identified various additional potential virulence factors likely acquired on mobile genetic elements in the virulent strains. These results provide insight into the emergence of virulence in P. thiaminolyticus and suggest avenues for the diagnosis and treatment of this novel bacterial pathogen. IMPORTANCE Postinfectious hydrocephalus, a devastating sequela of neonatal infection, is associated with increased childhood mortality and morbidity. A novel bacterial pathogen, Paenibacillus thiaminolyticus, is highly associated with postinfectious hydrocephalus in an African cohort. Whole-genome sequencing, RNA sequencing, and proteomics of clinical isolates and a reference strain in combination with CRISPR editing identified type IV pili as a critical virulence factor for P. thiaminolyticus infection. Acquisition of a type IV pilus-encoding mobile genetic element critically contributed to converting a nonpathogenic strain of P. thiaminolyticus into a pathogen capable of causing devastating diseases. Given the widespread presence of type IV pilus in pathogens, the presence of the type IV pilus operon could serve as a diagnostic and therapeutic target in P. thiaminolyticus and related bacteria.
Collapse
|
8
|
Soriano LG, Melo JRT. Costs of pediatric hydrocephalus treatment for the Brazilian public health system in the Northeast of Brazil. Childs Nerv Syst 2022; 38:2149-2154. [PMID: 35948831 DOI: 10.1007/s00381-022-05630-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 07/19/2022] [Indexed: 11/30/2022]
Abstract
PURPOSE To estimate the costs of the surgical treatment of pediatric hydrocephalus, specifically ventriculoperitoneal shunt (VPS) and endoscopic third ventriculostomy (ETV), for the Brazilian public health system (SUS). METHODS Retrospective cohort study of health records of patients < 14 years of age with a diagnosis of hydrocephalus who underwent VPS or ETV between September 2009 and June 2016, regularly followed up for 24 months. RESULTS Seventy-six medical records were included. The groups of children who underwent VPS and ETV consisted of 60 and 16 patients, respectively. Complications during 2 years of follow-up were identified in 56% of the children undergoing VPS and in 18% of those undergoing ETV (p = 0.0103). The initial cost of VPS was lower than that of ETV up to approximately 1 year of post-surgical follow-up. After that, VPS generated higher expenses for the SUS due to higher rates of late post-surgical complications and repeated readmissions. CONCLUSION Higher public expenditures were observed in the group of children undergoing VPS due to higher rates of infectious and mechanical complications requiring repeated hospitalizations and prosthesis replacements. Public policies must be tailored to offer the best treatment to children with hydrocephalus and to make judicious use of public resources without compromising the quality of treatment.
Collapse
|
9
|
Abstract
This paper presents a novel continuum robot sheath for use in single-port minimally invasive procedures such as neuroendoscopy in which the sheath is designed to deliver multiple robotic arms. Actuation of the sheath is achieved by using precurved superelastic tubes lining the working channels used for arm delivery. These tubes perform a similar role to push/pull tendons, but can accomplish shape change of the sheath via rotation. A kinematic model using Cosserat rod theory is derived which is based on modeling the system as a set of eccentrically aligned precurved tubes constrained along their length by an elastic backbone. The specific case of a two-arm sheath is considered in detail. Simulation and experiments are used to investigate the validate the concept and model.
Collapse
Affiliation(s)
- Jiaole Wang
- School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen 518055, China.,Department of Cardiovascular Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Joseph Peine
- Department of Cardiovascular Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Pierre E. Dupont
- Department of Cardiovascular Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115, USA
| |
Collapse
|
10
|
Vadset TA, Rajaram A, Hsiao CH, Kemigisha Katungi M, Magombe J, Seruwu M, Kaaya Nsubuga B, Vyas R, Tatz J, Playter K, Nalule E, Natukwatsa D, Wabukoma M, Neri Perez LE, Mulondo R, Queally JT, Fenster A, Kulkarni AV, Schiff SJ, Grant PE, Mbabazi Kabachelor E, Warf BC, Sutin JDB, Lin PY. Improving Infant Hydrocephalus Outcomes in Uganda: A Longitudinal Prospective Study Protocol for Predicting Developmental Outcomes and Identifying Patients at Risk for Early Treatment Failure after ETV/CPC. Metabolites 2022; 12:78. [PMID: 35050201 PMCID: PMC8781620 DOI: 10.3390/metabo12010078] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 01/09/2022] [Accepted: 01/11/2022] [Indexed: 01/06/2023] Open
Abstract
Infant hydrocephalus poses a severe global health burden; 80% of cases occur in the developing world where patients have limited access to neurosurgical care. Surgical treatment combining endoscopic third ventriculostomy and choroid plexus cauterization (ETV/CPC), first practiced at CURE Children's Hospital of Uganda (CCHU), is as effective as standard ventriculoperitoneal shunt (VPS) placement while requiring fewer resources and less post-operative care. Although treatment focuses on controlling ventricle size, this has little association with treatment failure or long-term outcome. This study aims to monitor the progression of hydrocephalus and treatment response, and investigate the association between cerebral physiology, brain growth, and neurodevelopmental outcomes following surgery. We will enroll 300 infants admitted to CCHU for treatment. All patients will receive pre/post-operative measurements of cerebral tissue oxygenation (SO2), cerebral blood flow (CBF), and cerebral metabolic rate of oxygen consumption (CMRO2) using frequency-domain near-infrared combined with diffuse correlation spectroscopies (FDNIRS-DCS). Infants will also receive brain imaging, to monitor tissue/ventricle volume, and neurodevelopmental assessments until two years of age. This study will provide a foundation for implementing cerebral physiological monitoring to establish evidence-based guidelines for hydrocephalus treatment. This paper outlines the protocol, clinical workflow, data management, and analysis plan of this international, multi-center trial.
Collapse
Affiliation(s)
- Taylor A. Vadset
- Division of Newborn Medicine, Boston Children’s Hospital, Boston, MA 02115, USA; (T.A.V.); (A.R.); (C.-H.H.); (R.V.); (J.T.); (K.P.); (L.E.N.P.); (P.E.G.); (J.D.B.S.)
- Fetal-Neonatal Neuroimaging and Developmental Science Center, Boston Children’s Hospital, Boston, MA 02115, USA
| | - Ajay Rajaram
- Division of Newborn Medicine, Boston Children’s Hospital, Boston, MA 02115, USA; (T.A.V.); (A.R.); (C.-H.H.); (R.V.); (J.T.); (K.P.); (L.E.N.P.); (P.E.G.); (J.D.B.S.)
- Fetal-Neonatal Neuroimaging and Developmental Science Center, Boston Children’s Hospital, Boston, MA 02115, USA
- Department of Pediatrics, Harvard Medical School, Boston, MA 02115, USA
| | - Chuan-Heng Hsiao
- Division of Newborn Medicine, Boston Children’s Hospital, Boston, MA 02115, USA; (T.A.V.); (A.R.); (C.-H.H.); (R.V.); (J.T.); (K.P.); (L.E.N.P.); (P.E.G.); (J.D.B.S.)
- Fetal-Neonatal Neuroimaging and Developmental Science Center, Boston Children’s Hospital, Boston, MA 02115, USA
| | - Miriah Kemigisha Katungi
- CURE Children’s Hospital of Uganda, Mbale P.O. Box 903, Uganda; (M.K.K.); (J.M.); (M.S.); (B.K.N.); (E.N.); (D.N.); (M.W.); (R.M.); (E.M.K.)
| | - Joshua Magombe
- CURE Children’s Hospital of Uganda, Mbale P.O. Box 903, Uganda; (M.K.K.); (J.M.); (M.S.); (B.K.N.); (E.N.); (D.N.); (M.W.); (R.M.); (E.M.K.)
| | - Marvin Seruwu
- CURE Children’s Hospital of Uganda, Mbale P.O. Box 903, Uganda; (M.K.K.); (J.M.); (M.S.); (B.K.N.); (E.N.); (D.N.); (M.W.); (R.M.); (E.M.K.)
| | - Brian Kaaya Nsubuga
- CURE Children’s Hospital of Uganda, Mbale P.O. Box 903, Uganda; (M.K.K.); (J.M.); (M.S.); (B.K.N.); (E.N.); (D.N.); (M.W.); (R.M.); (E.M.K.)
| | - Rutvi Vyas
- Division of Newborn Medicine, Boston Children’s Hospital, Boston, MA 02115, USA; (T.A.V.); (A.R.); (C.-H.H.); (R.V.); (J.T.); (K.P.); (L.E.N.P.); (P.E.G.); (J.D.B.S.)
- Fetal-Neonatal Neuroimaging and Developmental Science Center, Boston Children’s Hospital, Boston, MA 02115, USA
| | - Julia Tatz
- Division of Newborn Medicine, Boston Children’s Hospital, Boston, MA 02115, USA; (T.A.V.); (A.R.); (C.-H.H.); (R.V.); (J.T.); (K.P.); (L.E.N.P.); (P.E.G.); (J.D.B.S.)
- Fetal-Neonatal Neuroimaging and Developmental Science Center, Boston Children’s Hospital, Boston, MA 02115, USA
| | - Katharine Playter
- Division of Newborn Medicine, Boston Children’s Hospital, Boston, MA 02115, USA; (T.A.V.); (A.R.); (C.-H.H.); (R.V.); (J.T.); (K.P.); (L.E.N.P.); (P.E.G.); (J.D.B.S.)
- Fetal-Neonatal Neuroimaging and Developmental Science Center, Boston Children’s Hospital, Boston, MA 02115, USA
| | - Esther Nalule
- CURE Children’s Hospital of Uganda, Mbale P.O. Box 903, Uganda; (M.K.K.); (J.M.); (M.S.); (B.K.N.); (E.N.); (D.N.); (M.W.); (R.M.); (E.M.K.)
| | - Davis Natukwatsa
- CURE Children’s Hospital of Uganda, Mbale P.O. Box 903, Uganda; (M.K.K.); (J.M.); (M.S.); (B.K.N.); (E.N.); (D.N.); (M.W.); (R.M.); (E.M.K.)
| | - Moses Wabukoma
- CURE Children’s Hospital of Uganda, Mbale P.O. Box 903, Uganda; (M.K.K.); (J.M.); (M.S.); (B.K.N.); (E.N.); (D.N.); (M.W.); (R.M.); (E.M.K.)
| | - Luis E. Neri Perez
- Division of Newborn Medicine, Boston Children’s Hospital, Boston, MA 02115, USA; (T.A.V.); (A.R.); (C.-H.H.); (R.V.); (J.T.); (K.P.); (L.E.N.P.); (P.E.G.); (J.D.B.S.)
- Fetal-Neonatal Neuroimaging and Developmental Science Center, Boston Children’s Hospital, Boston, MA 02115, USA
| | - Ronald Mulondo
- CURE Children’s Hospital of Uganda, Mbale P.O. Box 903, Uganda; (M.K.K.); (J.M.); (M.S.); (B.K.N.); (E.N.); (D.N.); (M.W.); (R.M.); (E.M.K.)
| | - Jennifer T. Queally
- Department of Psychiatry, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115, USA;
| | - Aaron Fenster
- Robarts Research Institute, Western University, London, ON N6A 3K7, Canada;
| | | | - Steven J. Schiff
- Center for Neural Engineering, Center for Infectious Disease Dynamics, Departments of Engineering Science and Mechanics, Neurosurgery, and Physics, The Pennsylvania State University, University Park, PA 16802, USA;
| | - Patricia Ellen Grant
- Division of Newborn Medicine, Boston Children’s Hospital, Boston, MA 02115, USA; (T.A.V.); (A.R.); (C.-H.H.); (R.V.); (J.T.); (K.P.); (L.E.N.P.); (P.E.G.); (J.D.B.S.)
- Fetal-Neonatal Neuroimaging and Developmental Science Center, Boston Children’s Hospital, Boston, MA 02115, USA
- Department of Pediatrics, Harvard Medical School, Boston, MA 02115, USA
- Department of Radiology, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Edith Mbabazi Kabachelor
- CURE Children’s Hospital of Uganda, Mbale P.O. Box 903, Uganda; (M.K.K.); (J.M.); (M.S.); (B.K.N.); (E.N.); (D.N.); (M.W.); (R.M.); (E.M.K.)
| | - Benjamin C. Warf
- Department of Neurosurgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115, USA;
| | - Jason D. B. Sutin
- Division of Newborn Medicine, Boston Children’s Hospital, Boston, MA 02115, USA; (T.A.V.); (A.R.); (C.-H.H.); (R.V.); (J.T.); (K.P.); (L.E.N.P.); (P.E.G.); (J.D.B.S.)
- Fetal-Neonatal Neuroimaging and Developmental Science Center, Boston Children’s Hospital, Boston, MA 02115, USA
- Department of Pediatrics, Harvard Medical School, Boston, MA 02115, USA
| | - Pei-Yi Lin
- Division of Newborn Medicine, Boston Children’s Hospital, Boston, MA 02115, USA; (T.A.V.); (A.R.); (C.-H.H.); (R.V.); (J.T.); (K.P.); (L.E.N.P.); (P.E.G.); (J.D.B.S.)
- Fetal-Neonatal Neuroimaging and Developmental Science Center, Boston Children’s Hospital, Boston, MA 02115, USA
- Department of Pediatrics, Harvard Medical School, Boston, MA 02115, USA
| |
Collapse
|
11
|
Abstract
Reparative inflammation is an important protective response that eliminates foreign organisms, damaged cells, and physical irritants. However, inappropriately triggered or sustained inflammation can respectively initiate, propagate, or prolong disease. Post-hemorrhagic (PHH) and post-infectious hydrocephalus (PIH) are the most common forms of hydrocephalus worldwide. They are treated using neurosurgical cerebrospinal fluid (CSF) diversion techniques with high complication and failure rates. Despite their distinct etiologies, clinical studies in human patients have shown PHH and PIH share similar CSF cytokine and immune cell profiles. Here, in light of recent work in model systems, we discuss the concept of "inflammatory hydrocephalus" to emphasize potential shared mechanisms and potential therapeutic vulnerabilities of these disorders. We propose that this change of emphasis could shift our thinking of PHH and PIH from a framework of life-long neurosurgical disorders to that of preventable conditions amenable to immunomodulation.
Collapse
|
12
|
Ferraris KP, Palabyab EPM, Kim S, Matsumura H, Yap MEC, Cloma-Rosales VO, Letyagin G, Muroi A, Baticulon RE, Alcazaren JC, Seng K, Navarro JE. Global Surgery Indicators and Pediatric Hydrocephalus: A Multicenter Cross-Country Comparative Study Building the Case for Health System Strengthening. Front Surg 2021; 8:704346. [PMID: 34513913 PMCID: PMC8428174 DOI: 10.3389/fsurg.2021.704346] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Accepted: 07/29/2021] [Indexed: 11/16/2022] Open
Abstract
Objective: The aim of this study is to compare specific three-institution, cross-country data that are relevant to the Global Surgery indicators and the functioning of health systems. Methods: We retrospectively reviewed the clinical and socioeconomic characteristics of pediatric patients who underwent cerebrospinal fluid (CSF) diversion surgery for hydrocephalus in three different centers: the University of Tsukuba Hospital in Ibaraki, Japan (HIC), the Jose R. Reyes Memorial Medical Center in Manila, Philippines [low-to-middle-income country (LMIC)], and the Federal Neurosurgical Center in Novosibirsk, Russia (UMIC). The outcomes of interest were the timing of CSF diversion surgery and mortality. Statistical tests included descriptive statistics, Cox proportional hazards model, and logistic regression. Nation-level data were also obtained to provide the relevant socioeconomic contexts in discussing the results. Results: In total, 159 children were included, where 13 are from Japan, 99 are from the Philippines, and 47 are from the Russian Federation. The median time to surgery at the specific neurosurgical centers was 6 days in the Philippines and 1 day in both Japan and Russia. For the cohort from the Philippines, non-poor patients were more likely to receive CSF diversion surgery at an earlier time (HR = 4.74, 95% CI 2.34-9.61, p <0.001). In the same center, those with infantile or posthemorrhagic hydrocephalus (HR = 3.72, 95% CI 1.70-8.15, p = 0.001) were more likely to receive CSF diversion earlier compared to those with congenital hydrocephalus, and those with postinfectious (HR = 0.39, 95% CI 0.22-0.70, p = 0.002) or myelomeningocele-associated hydrocephalus (HR = 0.46, 95% CI 0.22-0.95, p = 0.037) were less likely to undergo surgery at an earlier time. For Russia, older patients were more likely to receive or require early CSF diversion (HR = 1.07, 95% CI 1.01-1.14, p = 0.035). External ventricular drain (EVD) insertion was found to be associated with mortality (cOR 14.45, 95% CI 1.28-162.97, p = 0.031). Conclusion: In this study, Filipino children underwent late time-interval of CSF diversion surgery and had mortality differences compared to their Japanese and Russian counterparts. These disparities may reflect on the functioning of the health systems of respective countries.
Collapse
Affiliation(s)
- Kevin Paul Ferraris
- Section of Neurosurgery, Department of Surgery, Jose R. Reyes Memorial Medical Center, Manila, Philippines
| | - Eric Paolo M. Palabyab
- Section of Neurosurgery, Department of Surgery, Jose R. Reyes Memorial Medical Center, Manila, Philippines
| | - Sergei Kim
- Department of Pediatric Neurosurgery, Federal Neurosurgical Center of Ministry of Public Health, Novosibirsk, Russia
| | - Hideaki Matsumura
- Department of Neurosurgery, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | | | | | - German Letyagin
- Department of Pediatric Neurosurgery, Federal Neurosurgical Center of Ministry of Public Health, Novosibirsk, Russia
| | - Ai Muroi
- Department of Neurosurgery, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Ronnie E. Baticulon
- Section of Neurosurgery, Department of Surgery, Jose R. Reyes Memorial Medical Center, Manila, Philippines
- Division of Neurosurgery, Department of Neurosciences, College of Medicine and Philippine General Hospital, University of the Philippines, Manila, Philippines
| | - Jose Carlos Alcazaren
- Section of Neurosurgery, Department of Surgery, Jose R. Reyes Memorial Medical Center, Manila, Philippines
| | - Kenny Seng
- Section of Neurosurgery, Department of Surgery, Jose R. Reyes Memorial Medical Center, Manila, Philippines
- Division of Neurosurgery, Department of Neurosciences, College of Medicine and Philippine General Hospital, University of the Philippines, Manila, Philippines
| | - Joseph Erroll Navarro
- Section of Neurosurgery, Department of Surgery, Jose R. Reyes Memorial Medical Center, Manila, Philippines
| |
Collapse
|
13
|
Paulson JN, Williams BL, Hehnly C, Mishra N, Sinnar SA, Zhang L, Ssentongo P, Mbabazi-Kabachelor E, Wijetunge DSS, von Bredow B, Mulondo R, Kiwanuka J, Bajunirwe F, Bazira J, Bebell LM, Burgoine K, Couto-Rodriguez M, Ericson JE, Erickson T, Ferrari M, Gladstone M, Guo C, Haran M, Hornig M, Isaacs AM, Kaaya BN, Kangere SM, Kulkarni AV, Kumbakumba E, Li X, Limbrick DD, Magombe J, Morton SU, Mugamba J, Ng J, Olupot-Olupot P, Onen J, Peterson MR, Roy F, Sheldon K, Townsend R, Weeks AD, Whalen AJ, Quackenbush J, Ssenyonga P, Galperin MY, Almeida M, Atkins H, Warf BC, Lipkin WI, Broach JR, Schiff SJ. Paenibacillus infection with frequent viral coinfection contributes to postinfectious hydrocephalus in Ugandan infants. Sci Transl Med 2021; 12:12/563/eaba0565. [PMID: 32998967 DOI: 10.1126/scitranslmed.aba0565] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 05/06/2020] [Indexed: 12/14/2022]
Abstract
Postinfectious hydrocephalus (PIH), which often follows neonatal sepsis, is the most common cause of pediatric hydrocephalus worldwide, yet the microbial pathogens underlying this disease remain to be elucidated. Characterization of the microbial agents causing PIH would enable a shift from surgical palliation of cerebrospinal fluid (CSF) accumulation to prevention of the disease. Here, we examined blood and CSF samples collected from 100 consecutive infant cases of PIH and control cases comprising infants with non-postinfectious hydrocephalus in Uganda. Genomic sequencing of samples was undertaken to test for bacterial, fungal, and parasitic DNA; DNA and RNA sequencing was used to identify viruses; and bacterial culture recovery was used to identify potential causative organisms. We found that infection with the bacterium Paenibacillus, together with frequent cytomegalovirus (CMV) coinfection, was associated with PIH in our infant cohort. Assembly of the genome of a facultative anaerobic bacterial isolate recovered from cultures of CSF samples from PIH cases identified a strain of Paenibacillus thiaminolyticus This strain, designated Mbale, was lethal when injected into mice in contrast to the benign reference Paenibacillus strain. These findings show that an unbiased pan-microbial approach enabled characterization of Paenibacillus in CSF samples from PIH cases, and point toward a pathway of more optimal treatment and prevention for PIH and other proximate neonatal infections.
Collapse
Affiliation(s)
- Joseph N Paulson
- Department of Biostatistics, Product Development, Genentech Inc., South San Francisco, CA 94080, USA
| | - Brent L Williams
- Center for Infection and Immunity, Mailman School of Public Health, Columbia University, New York, NY 10032, USA.,Department of Epidemiology, Columbia University Mailman School of Public Health, New York, NY 10032, USA
| | - Christine Hehnly
- Institute for Personalized Medicine, Department of Biochemistry and Molecular Biology, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
| | - Nischay Mishra
- Center for Infection and Immunity, Mailman School of Public Health, Columbia University, New York, NY 10032, USA.,Department of Epidemiology, Columbia University Mailman School of Public Health, New York, NY 10032, USA
| | - Shamim A Sinnar
- Center for Neural Engineering, Pennsylvania State University, University Park, PA 16802, USA.,Department of Medicine, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
| | - Lijun Zhang
- Institute for Personalized Medicine, Department of Biochemistry and Molecular Biology, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
| | - Paddy Ssentongo
- Center for Neural Engineering, Pennsylvania State University, University Park, PA 16802, USA.,Department of Engineering Science and Mechanics, Pennsylvania State University, University Park, PA 16802, USA.,Department of Public Health Sciences, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
| | | | - Dona S S Wijetunge
- Department of Pathology, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
| | - Benjamin von Bredow
- Department of Pathology, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
| | - Ronnie Mulondo
- CURE Children's Hospital of Uganda, Plot 97-105, Bugwere Road, P.O. Box 903 Mbale, Uganda
| | - Julius Kiwanuka
- Department of Pediatrics, Mbarara University of Science and Technology, P.O. Box 1410 Mbarara, Uganda
| | - Francis Bajunirwe
- Department of Epidemiology, Mbarara University of Science and Technology, P.O. Box 1410, Mbarara, Uganda
| | - Joel Bazira
- Department of Microbiology, Mbarara University of Science and Technology, P.O. Box 1410 Mbarara, Uganda
| | - Lisa M Bebell
- Division of Infectious Disease, Massachusetts Genereal Hospital, Harvard Medical School, 55 Fruit St, GRJ-504, Boston, MA 02114, USA
| | - Kathy Burgoine
- Neonatal Unit, Department of Paediatrics and Child Health, Mbale Regional Referral Hospital, Plot 29-33 Pallisa Road, P.O. Box 1966, Mbale, Uganda.,Mbale Clinical Research Institute, Mbale Regional Referral Hospital, Plot 29-33 Pallisa Road, P.O. Box 1966 Mbale, Uganda.,University of Liverpool, Liverpool, L69 3BX, UK
| | - Mara Couto-Rodriguez
- Center for Infection and Immunity, Mailman School of Public Health, Columbia University, New York, NY 10032, USA.,Biotia, 100 6th avenue, New York, NY 10013, USA
| | - Jessica E Ericson
- Division of Pediatric Infectious Disease, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
| | - Tim Erickson
- CURE Children's Hospital of Uganda, Plot 97-105, Bugwere Road, P.O. Box 903 Mbale, Uganda
| | - Matthew Ferrari
- Center for Infectious Disease Dynamics, Pennsylvania State University, University Park, PA 16802, USA.,Department of Biology, Pennsylvania State University, University Park, PA 16802, USA.,Department of Statistics, Pennsylvania State University, University Park, PA 16802, USA
| | - Melissa Gladstone
- Institute for Translational Medicine, University of Liverpool, Liverpool, L12 2AP, UK
| | - Cheng Guo
- Center for Infection and Immunity, Mailman School of Public Health, Columbia University, New York, NY 10032, USA
| | - Murali Haran
- Department of Statistics, Pennsylvania State University, University Park, PA 16802, USA
| | - Mady Hornig
- Department of Epidemiology, Columbia University Mailman School of Public Health, New York, NY 10032, USA
| | - Albert M Isaacs
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO 63130, USA
| | - Brian Nsubuga Kaaya
- CURE Children's Hospital of Uganda, Plot 97-105, Bugwere Road, P.O. Box 903 Mbale, Uganda
| | - Sheila M Kangere
- CURE Children's Hospital of Uganda, Plot 97-105, Bugwere Road, P.O. Box 903 Mbale, Uganda
| | - Abhaya V Kulkarni
- Division of Neurosurgery, Hospital for Sick Children, University of Toronto, Toronto, Ontario, M5G 1X8, Canada
| | - Elias Kumbakumba
- Department of Pediatrics, Mbarara University of Science and Technology, P.O. Box 1410 Mbarara, Uganda
| | - Xiaoxiao Li
- Institute for Translational Medicine, University of Liverpool, Liverpool, L12 2AP, UK
| | - David D Limbrick
- Department of Neurological Surgery, Washington University School of Medicine, St. Louis, MO 63130, USA
| | - Joshua Magombe
- CURE Children's Hospital of Uganda, Plot 97-105, Bugwere Road, P.O. Box 903 Mbale, Uganda
| | - Sarah U Morton
- Division of Newborn Medicine, Boston Children's Hospital and Department of Pediatrics, Harvard Medical School, Boston MA 02115, USA
| | - John Mugamba
- CURE Children's Hospital of Uganda, Plot 97-105, Bugwere Road, P.O. Box 903 Mbale, Uganda
| | - James Ng
- Center for Infection and Immunity, Mailman School of Public Health, Columbia University, New York, NY 10032, USA
| | - Peter Olupot-Olupot
- Mbale Clinical Research Institute, Mbale Regional Referral Hospital, Plot 29-33 Pallisa Road, P.O. Box 1966 Mbale, Uganda.,Busitema University, Mbale Campus, Plot 29-33 Pallisa Road, P.O. Box 1966, Mbale, Uganda
| | - Justin Onen
- CURE Children's Hospital of Uganda, Plot 97-105, Bugwere Road, P.O. Box 903 Mbale, Uganda
| | - Mallory R Peterson
- Center for Neural Engineering, Pennsylvania State University, University Park, PA 16802, USA.,Department of Engineering Science and Mechanics, Pennsylvania State University, University Park, PA 16802, USA
| | - Farrah Roy
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA
| | - Kathryn Sheldon
- Institute for Personalized Medicine, Department of Biochemistry and Molecular Biology, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
| | - Reid Townsend
- Department of Medicine, Washington University School of Medicine , St. Louis, MO 63130, USA
| | - Andrew D Weeks
- Sanyu Research Unit, Liverpool Women's Hospital, University of Liverpool, Liverpool L8 7SS, UK
| | - Andrew J Whalen
- Department of Mechanical Engineering, Pennsylvania State University, University Park, PA 16802, USA
| | - John Quackenbush
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA
| | - Peter Ssenyonga
- CURE Children's Hospital of Uganda, Plot 97-105, Bugwere Road, P.O. Box 903 Mbale, Uganda
| | - Michael Y Galperin
- National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, MD 20894, USA
| | - Mathieu Almeida
- Université Paris-Saclay, INRAE, MGP, Jouy-en-Josas, 78350, France
| | - Hannah Atkins
- Department of Comparative Medicine, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
| | - Benjamin C Warf
- Department of Neurosurgery, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - W Ian Lipkin
- Center for Infection and Immunity, Mailman School of Public Health, Columbia University, New York, NY 10032, USA.,Department of Epidemiology, Columbia University Mailman School of Public Health, New York, NY 10032, USA
| | - James R Broach
- Institute for Personalized Medicine, Department of Biochemistry and Molecular Biology, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
| | - Steven J Schiff
- Center for Neural Engineering, Pennsylvania State University, University Park, PA 16802, USA. .,Department of Engineering Science and Mechanics, Pennsylvania State University, University Park, PA 16802, USA.,Center for Infectious Disease Dynamics, Pennsylvania State University, University Park, PA 16802, USA.,Department of Neurosurgery, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA.,Department of Physics, Pennsylvania State University, University Park, PA 16802, USA
| |
Collapse
|
14
|
Abstract
Neonatal sepsis (NS) kills 750,000 infants every year. Effectively treating NS requires timely diagnosis and antimicrobial therapy matched to the causative pathogens, but most blood cultures for suspected NS do not recover a causative pathogen. We refer to these suspected but unidentified pathogens as microbial dark matter. Given these low culture recovery rates, many non–culture-based technologies are being explored to diagnose NS, including PCR, 16S amplicon sequencing, and whole metagenomic sequencing. However, few of these newer technologies are scalable or sustainable globally. To reduce worldwide deaths from NS, one possibility may be performing population-wide pathogen discovery. Because pathogen transmission patterns can vary across space and time, computational models can be built to predict the pathogens responsible for NS by region and season. This approach could help to optimally treat patients, decreasing deaths from NS and increasing antimicrobial stewardship until effective diagnostics that are scalable become available globally.
Collapse
|
15
|
Isaacs AM, Morton SU, Movassagh M, Zhang Q, Hehnly C, Zhang L, Morales DM, Sinnar SA, Ericson JE, Mbabazi-Kabachelor E, Ssenyonga P, Onen J, Mulondo R, Hornig M, Warf BC, Broach JR, Townsend RR, Limbrick DD, Paulson JN, Schiff SJ. Immune activation during Paenibacillus brain infection in African infants with frequent cytomegalovirus co-infection. iScience 2021; 24:102351. [PMID: 33912816 PMCID: PMC8065213 DOI: 10.1016/j.isci.2021.102351] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 02/24/2021] [Accepted: 03/19/2021] [Indexed: 12/16/2022] Open
Abstract
Inflammation during neonatal brain infections leads to significant secondary sequelae such as hydrocephalus, which often follows neonatal sepsis in the developing world. In 100 African hydrocephalic infants we identified the biological pathways that account for this response. The dominant bacterial pathogen was a Paenibacillus species, with frequent cytomegalovirus co-infection. A proteogenomic strategy was employed to confirm host immune response to Paenibacillus and to define the interplay within the host immune response network. Immune activation emphasized neuroinflammation, oxidative stress reaction, and extracellular matrix organization. The innate immune system response included neutrophil activity, signaling via IL-4, IL-12, IL-13, interferon, and Jak/STAT pathways. Platelet-activating factors and factors involved with microbe recognition such as Class I MHC antigen-presenting complex were also increased. Evidence suggests that dysregulated neuroinflammation propagates inflammatory hydrocephalus, and these pathways are potential targets for adjunctive treatments to reduce the hazards of neuroinflammation and risk of hydrocephalus following neonatal sepsis. There is a characteristic immune response to Paenibacillus brain infection There is a characteristic immune response to CMV brain infection The matching immune response validates pathogen genomic presence The combined results support molecular infection causality
Collapse
Affiliation(s)
- Albert M Isaacs
- Department of Neuroscience, Washington University School of Medicine, St. Louis, MO 63110, USA.,Department of Clinical Neurosciences, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - Sarah U Morton
- Division of Newborn Medicine, Boston Children's Hospital, Boston, MA 02115, USA.,Department of Pediatrics, Harvard Medical School, Boston, MA 02115, USA
| | - Mercedeh Movassagh
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA
| | - Qiang Zhang
- Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Christine Hehnly
- Institute for Personalized Medicine, Pennsylvania State University, Hershey, PA 17033, USA.,Department of Biochemistry and Molecular Biology, Pennsylvania State University, State College, PA 16801, USA
| | - Lijun Zhang
- Institute for Personalized Medicine, Pennsylvania State University, Hershey, PA 17033, USA
| | - Diego M Morales
- Department of Neurosurgery, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Shamim A Sinnar
- Center for Neural Engineering, Pennsylvania State University, State College, PA 16801, USA.,Department of Medicine, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
| | - Jessica E Ericson
- Department of Pediatrics, Pennsylvania State College of Medicine, Hershey, PA 17033, USA
| | | | | | - Justin Onen
- CURE Children's Hospital of Uganda, Mbale, Uganda
| | | | - Mady Hornig
- Department of Epidemiology, Columbia University Mailman School of Public Health, New York, NY 10032, USA
| | - Benjamin C Warf
- Department of Neurosurgery, Harvard Medical School, Boston, MA 02115, USA
| | - James R Broach
- Institute for Personalized Medicine, Pennsylvania State University, Hershey, PA 17033, USA.,Department of Biochemistry and Molecular Biology, Pennsylvania State University, State College, PA 16801, USA
| | - R Reid Townsend
- Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - David D Limbrick
- Department of Neurosurgery, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Joseph N Paulson
- Department of Biostatistics, Product Development, Genentech Inc., South San Francisco, CA 94080, USA
| | - Steven J Schiff
- Center for Neural Engineering, Pennsylvania State University, State College, PA 16801, USA.,Center for Infectious Disease Dynamics, Departments of Neurosurgery, Engineering Science and Mechanics, and Physics, The Pennsylvania State University, University Park, PA 16802, USA
| |
Collapse
|
16
|
Choudhary A, Sobti S, Zambre S, Bhaskar S. Endoscopic Third Ventriculostomy in Failed Ventriculoperitoneal Shunt in Pediatric Population. Asian J Neurosurg 2021; 15:937-940. [PMID: 33708666 PMCID: PMC7869297 DOI: 10.4103/ajns.ajns_117_20] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 04/23/2020] [Accepted: 08/13/2020] [Indexed: 11/04/2022] Open
Abstract
Introduction Ventriculoperitoneal (VP) shunt malfunction is common in pediatric age group patients. There is a high complication rate and revision rate of VP shunt. Endoscopic third ventriculostomy (ETV) can alleviate these complications and can act as an effective alternative for the treatment of hydrocephalus in this age group of patients. Materials and Methods The authors retrospectively reviewed the management and outcome of 36 failed VP shunts in pediatric patients for the treatment of hydrocephalus. The surgeries were performed between November 2010 and January 2016 in a tertiary care hospital. The minimal follow-up period was 3 months. We divided the patients into the following age groups: <1 year (eight infants), 1-10 years (18 children), and 10-18 years (10 children). The success of the procedure was determined by age, sex, type of hydrocephalus, and the number of shunt revisions and malfunction before ETV. Children with different age (P = 0.839) and sex group did not show any significant data (P = 0.798). Children with communicating hydrocephalus had a success rate of 52.9% (17 patients), and children with noncommunicating hydrocephalus had a success rate of 84.2% (19 patients). The success rate in children with only one shunt malfunction was 57.1% (21 patients), whereas in 15 children with two or more shunt malfunctions, the success rate of ETV was 86.7%. Conclusions The authors conclude that ETV is an effective alternative for the treatment of hydrocephalus in children. Age does not present a contraindication for ETV in failed VP shunt.
Collapse
Affiliation(s)
- Ajay Choudhary
- Department of Neurosurgery, ABVIMS and Dr. RML Hospital, New Delhi, India
| | - Shivender Sobti
- Department of Neurosurgery, Dayanand Medical College and Hospital, Ludhiana, Punjab, India
| | - Sourabh Zambre
- Department of Neurosurgery, SGPGI, Lucknow, Uttar Pradesh, India
| | | |
Collapse
|
17
|
Khan B, Hamayun S, Haqqani U, Khanzada K, Ullah S, Khattak R, Zadran N, Bibi Z, Khan AW. Early Complications of Ventriculoperitoneal Shunt in Pediatric Patients With Hydrocephalus. Cureus 2021; 13:e13506. [PMID: 33786215 PMCID: PMC7993285 DOI: 10.7759/cureus.13506] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Objective Ventriculoperitoneal shunt (VPS) is the most commonly used procedure for the treatment of hydrocephalus (HDC), especially in children. However, this is prone to many complications, and requires repeated surgeries, which as such increases the morbidity of the patients. It is estimated that majority of the complications occurs in the immediate post-operative period and the rate of complications decreases over the time, with no impunity to these, though. We conducted this study to know about the complications of VPS in the early post-operative period, in pediatric patients with hydrocephalus. Materials and methods This descriptive study was conducted in the Department of Neurosurgery, Lady Reading Hospital, Peshawar, between June 2019 and January 2020 (seven months). All patients with hydrocephalus below 12 years of age, operated for the first time were included after taking an informed consent, while those with repeated shunt procedures and elderly patients requiring shunt were excluded from the study. Patients’ details like age, gender, location, contact number, cause of hydrocephalus, date of shunt placement, type of surgery (elective or emergency) and any follow-up complications like failure, erosion, infections, ileus were noted on a predesigned proforma. After the surgery, patients were followed for a period of one month, and contacted either through the telephone or asked to visit in the outpatients on the specified days, and were evaluated for any shunt-related complications, and any of these complications suspected were further evaluated and noted. The data was analyzed using the statistical program SPSS version 19 (IBM Corp., Armonk, NY). Results are presented in the form of charts, tables and graph. Results During the study period, we evaluated a total of 151 patients; there were 78 (51.65%) males and 73 (48.34%) females with a male to female ratio approaching 1.1:1. The age range was from 22 days to 12 years. The mean age was 38.46 ± 7.53 months. The primary indications for the insertion of VP shunt were: congenital hydrocephalus in 70 (46.4%), post infectious hydrocephalus in 57 (37.7%), hydrocephalus due to tumor in 22 (14.6%), and post traumatic hydrocephalus in two (1.4%) patients. Among the total number of patients, 85 patients (55.6%) were done as elective cases and 66 patients (44.4%) were done as emergency cases. Complications were encountered in 30 patients (19.87%) during the follow-up of 30 days. Complications occurred between day 1 and day 20 of follow-up with a mean of 9.10 ± 1.69 2SD days. Conclusion VP shunt is the most widely used treatment for HDC, but is predisposed to complications and almost every fifth case of VP shunt comes across with complications. Shunt blockage, infections and abdominal wound-related complications are common earlier complications in pediatric patients with hydrocephalus.
Collapse
Affiliation(s)
- Bilal Khan
- Neurosurgery, Lady Reading Hospital-Medical Teaching Institutions (MTI), Peshawar, PAK
| | | | - Usman Haqqani
- Neurosurgery, Qazi Hussain Ahmed Medical Complex, Nowshera, PAK
| | | | - Sajjad Ullah
- Neurosurgery, Khyber Teaching Hospital-Medical Teaching Institutions (MTI), Peshawar, PAK
| | - Rizwanullah Khattak
- Neurosurgery, Hayatabad Medical Complex-Medical Teaching Institutions (MTI), Peshawar, PAK
| | | | - Zohra Bibi
- Psychiatry, Lady Reading Hospital-Medical Teaching Institutions (MTI), Peshawar, PAK
| | - Abdul Wali Khan
- Internal Medicine, College of Physicians and Surgeons Pakistan, Peshawar, PAK.,Internal Medicine, Hayatabad Medical Complex Peshawar, Peshawar, PAK
| |
Collapse
|
18
|
Gorgoglione N, Fazzari E, Alafaci C, Vitulli F, Zaccaria R, Angileri FF, Germanò A, Esposito F. An Unusual But Possible Complication After Endoscopic Third Ventriculostomy. World Neurosurg 2020; 146:287-291. [PMID: 33276175 DOI: 10.1016/j.wneu.2020.11.149] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 11/24/2020] [Accepted: 11/25/2020] [Indexed: 11/29/2022]
Abstract
BACKGROUND We present an unusual but possible complication after ETV for the treatment of acute hydrocephalus due to malfunction of a previously implanted V-P shunt. CASE DESCRIPTION A 12-year-old male patient was urgently operated upon by means of an endoscopic third-ventriculostomy and the positioning of a temporary external ventricular catheter because of the malfunction of a previously implanted V-P shunt; immediately after the operation, the tip of the external catheter caused an obstruction of the ostomy, which was resolved with the withdrawn of catheter for circa 1 cm, left closed and ultimately removed after 4 days. The patient did not present any further symptom and remained shunt-free at the last 2-year follow-up visit. CONCLUSIONS One should consider such occurrence in cases of early ETV failure when a ventricular catheter is left in situ, even though temporarily.
Collapse
Affiliation(s)
- Nicola Gorgoglione
- Division of Neurosurgery, Department of Biomedical and Dental Sciences and Morpho-Functional Imaging, University of Messina, Messina, Italy
| | - Elena Fazzari
- Division of Neurosurgery, Department of Biomedical and Dental Sciences and Morpho-Functional Imaging, University of Messina, Messina, Italy
| | - Concetta Alafaci
- Division of Neurosurgery, Department of Biomedical and Dental Sciences and Morpho-Functional Imaging, University of Messina, Messina, Italy
| | - Francesca Vitulli
- Division of Neurosurgery, Department of Neurosciences and Reproductive and Dental Sciences, Federico II University of Naples, Napoli, Italy
| | - Rossella Zaccaria
- Division of Neurosurgery, Department of Biomedical and Dental Sciences and Morpho-Functional Imaging, University of Messina, Messina, Italy
| | - Filippo F Angileri
- Division of Neurosurgery, Department of Biomedical and Dental Sciences and Morpho-Functional Imaging, University of Messina, Messina, Italy
| | - Antonino Germanò
- Division of Neurosurgery, Department of Biomedical and Dental Sciences and Morpho-Functional Imaging, University of Messina, Messina, Italy
| | - Felice Esposito
- Division of Neurosurgery, Department of Biomedical and Dental Sciences and Morpho-Functional Imaging, University of Messina, Messina, Italy; Division of Neurosurgery, Department of Neurosciences and Reproductive and Dental Sciences, Federico II University of Naples, Napoli, Italy.
| |
Collapse
|
19
|
Salem-Memou S, Chavey S, Elmoustapha H, Mamoune A, Moctar A, Salihy S, Boukhrissi N. [Hydrocephalus in newborns and infants at the Nouakchott National Hospital]. Pan Afr Med J 2020; 36:184. [PMID: 32952828 PMCID: PMC7467612 DOI: 10.11604/pamj.2020.36.184.18750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 06/20/2020] [Indexed: 11/11/2022] Open
Abstract
Neonatal and infant hydrocephalus is an important factor for mortality and morbidity in developing countries with limited diagnostic and therapeutic means. The purpose of this study was to report our experience in the management of this disease in Mauritania. We conducted a retrospective study of 126 medical records of newborns aged 0-24 months treated for hydrocephalus in the Department of Neurosurgery at the Nouakchott National Hospital from June 2014 to June 2018. Mean follow-up time was 15 months (9-27 months). The average age of patients was 5 months (2 days-20 months). Highest prevalence was observed among female babies (sex ratio 0.77). Our case series consisted of 45 newborns (35.7%) and 81 infants (64.3%). A history of infection during pregnancy was found in 19.8% of cases and neonatal infection in 23.8% of cases. Clinically, 87.3% had macrocephalus, 35.7% had psychomotor retardation and 15.8% refused to suckle. The main cause was myelomeningocele (23.8%), followed by meningitis (15.8%). Ventriculo-peritoneal derivation (VPD) was the first-line treatment in newborns (68.8%), while endoscopic ventriculocisternostomy (EDV) was the preferred approach in infants (74.1%). Overall complication rate was 26.1% (57.6% for VPD and 4.1% for EDV). Hydrocephalus is the most common disease treated by paediatric neurosurgeons in Africa. Management is usually delayed, hence the importance of prevention, especially of neural tube defects and infections.
Collapse
Affiliation(s)
- Sidi Salem-Memou
- Service de Neurochirurgie, Centre Hospitalier National, BP 612, Nouakchott, Mauritanie
| | - Sidiya Chavey
- Service de Neurochirurgie, Centre Hospitalier National, BP 612, Nouakchott, Mauritanie
| | - Hamdy Elmoustapha
- Service de Pédiatrie, Centre Hospitalier National, BP 612, Nouakchott, Mauritanie
| | - Abdallahi Mamoune
- Service de Neurochirurgie, Centre Hospitalier National, BP 612, Nouakchott, Mauritanie
| | - Ahmedou Moctar
- Service de Neurochirurgie, Centre Hospitalier National, BP 612, Nouakchott, Mauritanie
| | - Sidimohamed Salihy
- Service de Neurochirurgie, Centre Hospitalier National, BP 612, Nouakchott, Mauritanie
| | - Najat Boukhrissi
- Service de Neurochirurgie, Centre Hospitalier National, BP 612, Nouakchott, Mauritanie
| |
Collapse
|
20
|
Reynolds RA, Bhebhe A, Garcia RM, Zhao S, Lam S, Sichizya K, Shannon CN. Pediatric hydrocephalus outcomes in Lusaka, Zambia. J Neurosurg Pediatr 2020; 26:624-635. [PMID: 32916646 PMCID: PMC7947024 DOI: 10.3171/2020.5.peds20193] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Accepted: 05/21/2020] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Hydrocephalus is a global disease that disproportionally impacts low- and middle-income countries. Limited data are available from sub-Saharan Africa. This study aims to be the first to describe pediatric hydrocephalus epidemiology and outcomes in Lusaka, Zambia. METHODS This retrospective cohort study included patients < 18 years of age who underwent surgical treatment for hydrocephalus at Beit-CURE Hospital and the University Teaching Hospital in Lusaka, Zambia, from August 2017 to May 2019. Surgeries included ventriculoperitoneal shunt insertions, revisions, and endoscopic third ventriculostomies (ETVs) with or without choroid plexus cauterization (CPC). A descriptive analysis of patient demographics, clinical presentation, and etiologies was summarized, followed by a multivariable analysis of mortality and 90-day complications. RESULTS A total of 378 patients met the inclusion criteria. The median age at first surgery was 5.5 (IQR 3.1, 12.7) months, and 51% of patients were female (n = 193). The most common presenting symptom was irritability (65%, n = 247), followed by oculomotor abnormalities (54%, n = 204). Postinfectious hydrocephalus was the predominant etiology (65%, n = 226/347), and 9% had a myelomeningocele (n = 32/347). It was the first hydrocephalus surgery for 87% (n = 309) and, of that group, 15% underwent ETV/CPC (n = 45). Severe hydrocephalus was common, with 42% of head circumferences more than 6 cm above the 97th percentile (n = 111). The median follow-up duration was 33 (IQR 4, 117) days. The complication rate was 20% (n = 76), with infection being most common (n = 29). Overall, 7% of the patients died (n = 26). Postoperative complication was significantly associated with mortality (χ2 = 81.2, p < 0.001) with infections and CSF leaks showing the strongest association (χ2 = 14.6 and 15.2, respectively, p < 0.001). On adjusted multivariable analysis, shunt revisions were more likely to have a complication than ETV/CPC or primary shunt insertions (OR 2.45 [95% CI 1.26-4.76], p = 0.008), and the presence of any postoperative complication was the only significant predictor of mortality (OR 42.9 [95% CI 12.3-149.1], p < 0.001). CONCLUSIONS Pediatric postinfectious hydrocephalus is the most common etiology of hydrocephalus in Lusaka, Zambia, which is similar to other countries in sub-Saharan Africa. Most children present late with neglected hydrocephalus. Shunt revision procedures are more prone to complication than ETV/CPC or primary shunt insertion, and postoperative complications represent a significant predictor of mortality in this population.
Collapse
Affiliation(s)
- Rebecca A. Reynolds
- Department of Neurological Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
- Department of Neurological Surgery, University Teaching Hospital, Lusaka, Zambia
- Surgical Outcomes Center for Kids, Monroe Carell Jr. Children’s Hospital, Nashville, Tennessee
| | - Arnold Bhebhe
- Department of Neurological Surgery, University Teaching Hospital, Lusaka, Zambia
| | - Roxanna M. Garcia
- Department of Neurological Surgery, Northwestern University, Chicago, Illinois
| | - Shilin Zhao
- Vanderbilt Center for Quantitative Sciences, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Sandi Lam
- Department of Neurological Surgery, Northwestern University, Chicago, Illinois
| | - Kachinga Sichizya
- Department of Neurological Surgery, University Teaching Hospital, Lusaka, Zambia
| | - Chevis N. Shannon
- Department of Neurological Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
- Surgical Outcomes Center for Kids, Monroe Carell Jr. Children’s Hospital, Nashville, Tennessee
| |
Collapse
|
21
|
Darbar A, Mustansir F, Hani U, Sajid MI. A Review of Common Endoscopic Intracranial Approaches. Asian J Neurosurg 2020; 15:471-478. [PMID: 33145194 PMCID: PMC7591209 DOI: 10.4103/ajns.ajns_367_19] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 02/14/2020] [Accepted: 05/04/2020] [Indexed: 11/30/2022] Open
Abstract
With the evolution of surgical techniques, endoscopy has emerged as a suitable alternative to many instances of more invasive methods. In this review article, we aim to discuss the endoscopic advancements, procedural details, indications, and outcomes of the most commonly practiced neuroendoscopic procedures. We have also summarized the uses, techniques, and challenges of neuroendoscopy in select neurosurgical pathologies.
Collapse
Affiliation(s)
- Aneela Darbar
- Department of Neurosurgery, The Aga Khan University, Karachi, Pakistan
| | - Fatima Mustansir
- Department of Neurosurgery, The Aga Khan University, Karachi, Pakistan
| | - Ummey Hani
- Department of Neurosurgery, The Aga Khan University, Karachi, Pakistan
| | - Mir Ibrahim Sajid
- Department of Neurosurgery, The Aga Khan University, Karachi, Pakistan
| |
Collapse
|
22
|
Punchak M, Mbabazi Kabachelor E, Ogwal M, Nalule E, Nalwoga J, Ssenyonga P, Mugamba J, Rattani A, Dewan MC, Kulkarni AV, Schiff SJ, Warf B. The Incidence of Postoperative Seizures Following Treatment of Postinfectious Hydrocephalus in Ugandan Infants: A Post Hoc Comparison of Endoscopic Treatment vs Shunt Placement in a Randomized Controlled Trial. Neurosurgery 2020; 85:E714-E721. [PMID: 31086941 DOI: 10.1093/neuros/nyz122] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/26/2019] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND There are currently no published data directly comparing postoperative seizure incidence following endoscopic third ventriculostomy (ETV), with/without choroid plexus cauterization (CPC), to that for ventriculoperitoneal shunt (VPS) placement. OBJECTIVE To compare postoperative epilepsy incidence for ETV/CPC and VPS in Ugandan infants treated for postinfectious hydrocephalus (PIH). METHODS We performed an exploratory post hoc analysis of a randomized trial comparing VPS and ETV/CPC in 100 infants (<6 mo old) presenting with PIH. Minimum follow-up was 2 yr. Variables associated with and the incidence of postoperative epilepsy were compared (intention-to-treat) using a bivariate analysis. Time to first seizure was compared using the Kaplan-Meier method, and the relative risk for the 2 treatments was determined using Mantel-Haenszel hazard ratios. RESULTS Seizure incidence was not related to age (P = .075), weight (P = .768), sex (P = .151), head circumference (P = .281), time from illness to hydrocephalus onset (P = .973), or hydrocephalus onset to treatment (P = .074). Irritability (P = .027) and vision deficit (P = .04) were preoperative symptoms associated with postoperative seizures. Ten (10%) patients died, and 20 (20%) developed seizures over the follow-up period. Overall seizure incidence was 9.4 per 100 person-years (9.4 and 9.5 for ETV/CPC and VPS, respectively; P = .483), with no significant difference in seizure risk between groups (hazard ratio, 1.02; 95% CI: 0.42, 2.45; P = .966). Mean time to seizure onset was 8.5 mo for ETV/CPC and 11.2 mo for VPS (P = .464). As-treated, per-protocol, and attributable-intervention analyses yielded similar results. CONCLUSION Postoperative seizure incidence following treatment of PIH was 20% within 2 yr, regardless of treatment modality.
Collapse
Affiliation(s)
- Maria Punchak
- Global Neurosurgery Initiative, Program in Global Surgery and Social Change, Department of Global Health and Social Medicine, Harvard Medical School, Boston, Massachusetts.,David Geffen School of Medicine, University of California, Los Angeles, California
| | | | | | | | | | | | | | - Abbas Rattani
- Global Neurosurgery Initiative, Program in Global Surgery and Social Change, Department of Global Health and Social Medicine, Harvard Medical School, Boston, Massachusetts.,Meharry Medical College, School of Medicine, Nashville, Tennessee
| | - Michael C Dewan
- Global Neurosurgery Initiative, Program in Global Surgery and Social Change, Department of Global Health and Social Medicine, Harvard Medical School, Boston, Massachusetts.,Department of Neurological Surgery, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Abhaya V Kulkarni
- Division of Neurosurgery, Hospital for Sick Children, Toronto, Canada
| | - Steven J Schiff
- Center for Neural Engineering, Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, Pennsylvania
| | - Benjamin Warf
- Global Neurosurgery Initiative, Program in Global Surgery and Social Change, Department of Global Health and Social Medicine, Harvard Medical School, Boston, Massachusetts.,CURE Children's Hospital, Mbale, Uganda.,Department of Neurosurgery, Boston Children's Hospital, Boston, Massachusetts
| |
Collapse
|
23
|
Karimy JK, Reeves BC, Damisah E, Duy PQ, Antwi P, David W, Wang K, Schiff SJ, Limbrick DD, Alper SL, Warf BC, Nedergaard M, Simard JM, Kahle KT. Inflammation in acquired hydrocephalus: pathogenic mechanisms and therapeutic targets. Nat Rev Neurol 2020; 16:285-296. [PMID: 32152460 DOI: 10.1038/s41582-020-0321-y] [Citation(s) in RCA: 90] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/27/2020] [Indexed: 12/11/2022]
Abstract
Hydrocephalus is the most common neurosurgical disorder worldwide and is characterized by enlargement of the cerebrospinal fluid (CSF)-filled brain ventricles resulting from failed CSF homeostasis. Since the 1840s, physicians have observed inflammation in the brain and the CSF spaces in both posthaemorrhagic hydrocephalus (PHH) and postinfectious hydrocephalus (PIH). Reparative inflammation is an important protective response that eliminates foreign organisms, damaged cells and physical irritants; however, inappropriately triggered or sustained inflammation can respectively initiate or propagate disease. Recent data have begun to uncover the molecular mechanisms by which inflammation - driven by Toll-like receptor 4-regulated cytokines, immune cells and signalling pathways - contributes to the pathogenesis of hydrocephalus. We propose that therapeutic approaches that target inflammatory mediators in both PHH and PIH could address the multiple drivers of disease, including choroid plexus CSF hypersecretion, ependymal denudation, and damage and scarring of intraventricular and parenchymal (glia-lymphatic) CSF pathways. Here, we review the evidence for a prominent role of inflammation in the pathogenic mechanism of PHH and PIH and highlight promising targets for therapeutic intervention. Focusing research efforts on inflammation could shift our view of hydrocephalus from that of a lifelong neurosurgical disorder to that of a preventable neuroinflammatory condition.
Collapse
Affiliation(s)
- Jason K Karimy
- Department of Neurosurgery, Yale School of Medicine, New Haven, CT, USA
| | - Benjamin C Reeves
- Department of Neurosurgery, Yale School of Medicine, New Haven, CT, USA
| | - Eyiyemisi Damisah
- Department of Neurosurgery, Yale School of Medicine, New Haven, CT, USA
| | - Phan Q Duy
- Department of Neurosurgery, Yale School of Medicine, New Haven, CT, USA
| | - Prince Antwi
- Department of Neurosurgery, Yale School of Medicine, New Haven, CT, USA
| | - Wyatt David
- Department of Neurosurgery, Yale School of Medicine, New Haven, CT, USA
| | - Kevin Wang
- Department of Neurosurgery, Yale School of Medicine, New Haven, CT, USA
| | - Steven J Schiff
- Departments of Neurosurgery, Engineering Science & Mechanics, and Physics; Center for Neural Engineering, The Pennsylvania State University, University Park, PA, USA
| | - David D Limbrick
- Departments of Neurosurgery and Pediatrics, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
| | - Seth L Alper
- Division of Nephrology and Vascular Biology Research Center, Beth Israel Deaconess Medical Center, Department of Medicine, Harvard Medical School, Boston, MA, USA
| | - Benjamin C Warf
- Department of Neurosurgery, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - Maiken Nedergaard
- Center for Translational Neuromedicine, University of Rochester Medical Center, Rochester, NY, USA.,Center for Translational Neuromedicine, Faculty of Medical and Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - J Marc Simard
- Department of Neurosurgery, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Kristopher T Kahle
- Departments of Neurosurgery, Pediatrics, and Cellular & Molecular Physiology and Yale-Rockefeller NIH Centers for Mendelian Genomics, Yale School of Medicine, New Haven, CT, USA.
| |
Collapse
|
24
|
Lepard JR, Dewan MC, Chen SH, Bankole OB, Mugamba J, Ssenyonga P, Kulkarni AV, Warf BC. The CURE Protocol: evaluation and external validation of a new public health strategy for treating paediatric hydrocephalus in low-resource settings. BMJ Glob Health 2020; 5:e002100. [PMID: 32133193 PMCID: PMC7042585 DOI: 10.1136/bmjgh-2019-002100] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 12/07/2019] [Accepted: 12/23/2019] [Indexed: 11/05/2022] Open
Abstract
Introduction Managing paediatric hydrocephalus with shunt placement is especially risky in resource-limited settings due to risks of infection and delayed life-threatening shunt obstruction. This study evaluated a new evidence-based treatment algorithm to reduce shunt-dependence in this context. Methods A prospective cohort design was used. The CURE Protocol employs preoperative and intraoperative data to choose between endoscopic treatment and shunt placement. Data were prospectively collected for 730 children in Uganda (managed by local neurosurgeons highly experienced in the protocol) and, for external validation, 96 children in Nigeria (managed by a local neurosurgeon trained in the protocol). Results The age distribution was similar between Uganda and Nigeria, but there were more cases of postinfectious hydrocephalus in Uganda (64.2% vs 26.0%, p<0.001). Initial treatment of hydrocephalus was similar at both centres and included either a shunt at first operation or endoscopic management without a shunt. The Nigerian cohort had a higher failure rate for endoscopic cases (adjusted HR 2.5 (95% CI 1.6 to 4.0), p<0.001), but not for shunt cases (adjusted HR 1.3 (0.5 to 3.0), p=0.6). Despite the difference in endoscopic failure rates, a similar proportion of the entire cohort was successfully treated without need for shunt at 6 months (55.2% in Nigeria vs 53.4% in Uganda, p=0.74). Conclusion Use of the CURE Protocol in two centres with different populations and surgeon experience yielded similar 6-month results, with over half of all children remaining shunt-free. Where feasible, this could represent a better public health strategy in low-resource settings than primary shunt placement.
Collapse
Affiliation(s)
- Jacob R Lepard
- Neurosurgery, University of Alabama at Birmingham, Birmingham, Alabama, USA.,Program for Global Surgery and Social Change, Harvard Medical School Department of Global Health and Social Medicine, Boston, Massachusetts, USA
| | - Michael C Dewan
- Program for Global Surgery and Social Change, Harvard Medical School Department of Global Health and Social Medicine, Boston, Massachusetts, USA.,Neurological Surgery, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Stephanie H Chen
- Neurological Surgery, University of Miami Health System, Miami, Florida, USA
| | | | - John Mugamba
- Neurosurgery, CURE Children's Hospital of Uganda, Mbale, Uganda
| | - Peter Ssenyonga
- Neurosurgery, CURE Children's Hospital of Uganda, Mbale, Uganda
| | | | - Benjamin C Warf
- Program for Global Surgery and Social Change, Harvard Medical School Department of Global Health and Social Medicine, Boston, Massachusetts, USA.,Neurosurgery, Boston Children's Hospital, Boston, Massachusetts, USA
| |
Collapse
|
25
|
Weiss HK, Garcia RM, Omiye JA, Vervoort D, Riestenberg R, Yerneni K, Murthy N, Wescott AB, Hutchinson P, Rosseau G. A Systematic Review of Neurosurgical Care in Low-Income Countries. World Neurosurg X 2020; 5:100068. [PMID: 31956859 PMCID: PMC6957821 DOI: 10.1016/j.wnsx.2019.100068] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Accepted: 11/29/2019] [Indexed: 12/22/2022] Open
Abstract
OBJECTIVE More than 5 billion individuals lack access to essential surgical care. Neurosurgical care is especially limited in low-income countries (LICs). Studies describing neurosurgical care in LICs are critical for understanding global disparities in access to neurosurgical procedures. To better understand these disparities, we conducted a systematic review of the literature identifying neurosurgical patients in LICs. METHODS MEDLINE (PubMed), Embase (embase.com), and Cochrane Library (Wiley) databases were systematically searched to retrieve studies describing neurosurgical care in LICs as defined by the World Bank Country and Lending Groups income classification. All databases were searched from their inception; no date or language limits were applied. All the articles were blindly reviewed by 2 individuals. Data from eligible studies were extracted and summarized. RESULTS Of the 4377 citations screened, 154 studies met inclusion criteria. The number of publications substantially increased over the study period, with 49% (n = 76) of studies published in the last 5 years. Twenty-six percent (n = 40) of studies had a first author, and 30% (n = 46) had a senior author, affiliated with a country different from the LIC of study. The most common neurosurgical diagnosis was traumatic brain injury (24%, n = 37), followed by hydrocephalus (26%, n = 40), and neoplastic intracranial mass (10%, n = 16). Of LICs, 43% (n = 15/35) had no published neurosurgical literature. CONCLUSIONS There is a significant deficit in the literature on neurosurgical care in LICs. Efforts must focus on supporting research initiatives in LICs to improve publication bias and understand disparities in access to neurosurgical care in the lowest-resource countries.
Collapse
Affiliation(s)
- Hannah K. Weiss
- Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
- Department of Neurosurgery, Northwestern University, Chicago, Illinois, USA
| | - Roxanna M. Garcia
- Department of Neurosurgery, Northwestern University, Chicago, Illinois, USA
- Institute for Public Health and Medicine (IPHAM), Center for Healthcare Studies, Northwestern University, Chicago, Illinois, USA
| | | | - Dominique Vervoort
- Program in Global Surgery and Social Change, Harvard Medical School, Boston, Massachusetts, USA
| | - Robert Riestenberg
- Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
- Department of Neurosurgery, Northwestern University, Chicago, Illinois, USA
| | - Ketan Yerneni
- Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
- Department of Neurosurgery, Northwestern University, Chicago, Illinois, USA
| | - Nikhil Murthy
- Department of Neurosurgery, Northwestern University, Chicago, Illinois, USA
| | - Annie B. Wescott
- Galter Health Sciences Library & Learning Center, Northwestern University, Chicago, Illinois, USA
| | - Peter Hutchinson
- Division of Neurosurgery, Department of Clinical Neurosciences, Addenbrooke’s Hospital and University of Cambridge, Cambridge, United Kingdom
| | - Gail Rosseau
- Midwest Neurosurgical Associates, Oak Brook, Illinois, USA
| |
Collapse
|
26
|
Kong W, Wang X, Zhao J, Kang M, Xi N, Li S. A new frameshift mutation in L1CAM producing X-linked hydrocephalus. Mol Genet Genomic Med 2019; 8:e1031. [PMID: 31756056 PMCID: PMC6978236 DOI: 10.1002/mgg3.1031] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 09/30/2019] [Accepted: 10/11/2019] [Indexed: 11/07/2022] Open
Abstract
Background X‐linked hydrocephalus (XLH), characterized by mental retardation and bilateral adducted thumbs, often come out to be a genetic disorder of L1CAM. It codes the protein L1 cell adhesion molecule (L1CAM), playing a crucial role in the development of the nervous system. The objective of the study was to report a new disease‐causing mutation site of L1CAM, and gain further insight into the pathophysiology of hydrocephalus. Methods We collect the samples of a couple and their second hydrocephalic fetus. Then, the whole‐exome sequencing and in‐depth mutation analysis were performed. Results The variant c.2491delG (p.V831fs), located in the exon 19 of L1CAM (chrX:153131214), could damage the L1CAM function by producing a frameshift in the translation of fibronectin type‐III of L1CAM. Conclusion We identified a novel disease‐causing mutation in L1CAM for the first time, which further confirmed L1CAM as a gene underlying XLH cases.
Collapse
Affiliation(s)
- Weiqi Kong
- Department of Prenatal Diagnosis, Sichuan Provincial Hospital for Women and Children, Chengdu, China
| | - Xueyan Wang
- Department of Prenatal Diagnosis, Sichuan Provincial Hospital for Women and Children, Chengdu, China
| | - Jing Zhao
- Department of image, Sichuan Provincial Hospital for Women and Children, Chengdu, China
| | - Min Kang
- Department of image, Sichuan Provincial Hospital for Women and Children, Chengdu, China
| | - Na Xi
- Department of Prenatal Diagnosis, Sichuan Provincial Hospital for Women and Children, Chengdu, China
| | - Shengmei Li
- Department of gynecology, Sichuan Provincial Hospital for Women and Children, Chengdu, China
| |
Collapse
|
27
|
Olopade FE, Shokunbi MT, Azeez IA, Andrioli A, Scambi I, Bentivoglio M. Neuroinflammatory Response in Chronic Hydrocephalus in Juvenile Rats. Neuroscience 2019; 419:14-22. [DOI: 10.1016/j.neuroscience.2019.08.049] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 08/26/2019] [Accepted: 08/28/2019] [Indexed: 12/18/2022]
|
28
|
Phillips D, Steven DA, McDonald PJ, Riva-Cambrin J, Kulkarni AV, Mehta V. Interhypothalamic adhesions in endoscopic third ventriculostomy. Childs Nerv Syst 2019; 35:1565-1570. [PMID: 31172270 DOI: 10.1007/s00381-019-04231-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Accepted: 05/24/2019] [Indexed: 11/29/2022]
Abstract
INTRODUCTION An interhypothalamic adhesion (IHA) is a gray mater-like band of tissue traversing across the third ventricle anterior to the mammillary bodies and is similar but distinct from an interthalamic adhesion. These rare anatomic anomalies can be detected with magnetic resonance imaging or, incidentally, during endoscopic ventricular surgery. METHODS All cases of interhypothalamic adhesions visualized during endoscopic third ventriculotomy (ETV), outside of the myelomeningocele setting, were identified from two institutions. Retrospective chart and imaging reviews were conducted and compared to intraoperative videos and photos for all cases. IHA variables collected included the following size, location, multiplicity, and associated anatomic anomalies. RESULTS Four cases of interhypothalamic adhesions were identified during ETV-all of which, either partially or completely, obscured access to the third ventricular floor. The IHAs in our cohort were duplicated in two patients, large (> 3 mm and severely obstructing access to the third ventricular floor) in three patients, and adherent to the floor of the third ventricle in three patients. All four patients had primary absence of the septum pellucidum. Previous reports found associations of IHAs with other congenital, particularly midline, abnormalities. The IHAs in our cohort affected the surgery in three of four cases including misdirecting the ventriculostomy and requiring retraction or division of the IHA. In no case was postoperative pituitary or hypothalamic dysfunction observed. CONCLUSIONS Although interhypothalamic adhesions are rare, these anomalies must be recognized as they may hinder access to the third ventricular floor. IHAs may be large, multiple, or adherent to adjacent ventricular structures, they can misdirect or occlude the ventriculostomy or impart risk of bleeding and hypothalamic injury. Techniques for management of IHA include aborting the attempt, re-siting the ventriculostomy, or retracting or dividing the IHA, which enabled technically successful ETV in three of four patients in this series.
Collapse
Affiliation(s)
- David Phillips
- Division of Neurosurgery, Department of Clinical Neurosciences, University of Calgary, Calgary, Alberta, Canada. .,Division of Neurosurgery, Foothills Medical Campus, 1403 29th St. NW, Main Building, 12th Floor, Calgary, Alberta, T2N 2T9, Canada.
| | - David A Steven
- Department of Clinical Neurological Sciences, Western University and London Health Sciences Centre, London, Ontario, Canada
| | - Patrick J McDonald
- Division of Neurosurgery, University of British Columbia, Vancouver, British Columbia, Canada
| | - Jay Riva-Cambrin
- Division of Neurosurgery, Department of Clinical Neurosciences, University of Calgary, Calgary, Alberta, Canada
| | - Abhaya V Kulkarni
- Division of Neurosurgery, University of Toronto, Toronto, Ontario, Canada
| | - Vivek Mehta
- Division of Neurosurgery, University of Alberta, Edmonton, Alberta, Canada
| |
Collapse
|
29
|
Guan F, Peng WC, Huang H, Ren ZY, Wang ZY, Fu JD, Li YB, Cui FQ, Dai B, Zhu GT, Xiao ZY, Mao BB, Hu ZQ. Application of neuroendoscopic surgical techniques in the assessment and treatment of cerebral ventricular infection. Neural Regen Res 2019; 14:2095-2103. [PMID: 31397347 PMCID: PMC6788251 DOI: 10.4103/1673-5374.262591] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Cerebral ventricular infection (CVI) is one of the most dangerous complications in neurosurgery because of its high mortality and disability rates. Few studies have examined the application of neuroendoscopic surgical techniques (NESTs) to assess and treat CVI. This multicenter, retrospective study was conducted using clinical data of 32 patients with CVI who were assessed and treated by NESTs in China. The patients included 20 men and 12 women with a mean age of 42.97 years. NESTs were used to obliterate intraventricular debris and pus, fenestrate or incise the intraventricular compartment and reconstruct cerebrospinal fluid circulation, and remove artificial material. Intraventricular irrigation with antibiotic saline was applied after neuroendoscopic surgery (NES). Secondary hydrocephalus was treated by endoscopic third ventriculostomy or a ventriculoperitoneal shunt. Neuroendoscopic findings of CVI were used to classify patients into Grade I (n = 3), Grade II (n = 13), Grade III (n = 10), and Grade IV (n = 6) CVI. The three patients with grade I CVI underwent one NES, the 23 patients with grade II/III CVI underwent two NESs, and patients with grade IV CVI underwent two (n = 3) or three (n = 3) NESs. The imaging features and grades of neuroendoscopy results were positively related to the number of neurosurgical endoscopic procedures. Two patients died of multiple organ failure and the other 30 patients fully recovered. Among the 26 patients with secondary hydrocephalus, 18 received ventriculoperitoneal shunt and 8 underwent endoscopic third ventriculostomy. There were no recurrences of CVI during the 6- to 76-month follow-up after NES. Application of NESTs is an innovative method to assess and treat CVI, and its neuroendoscopic classification provides an objective, comprehensive assessment of CVI. The study trial was approved by the Institutional Review Board of Beijing Shijitan Hospital, Capital Medical University, China.
Collapse
Affiliation(s)
- Feng Guan
- Department of Neurosurgery, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Wei-Cheng Peng
- Department of Neurosurgery, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Hui Huang
- Department of Neurosurgery, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Zu-Yuan Ren
- Department of Neurosurgery, Peking Union Medical College Hospital, Beijing, China
| | - Zhen-Yu Wang
- Department of Neurosurgery, Peking University Third Hospital, Peking University, Beijing, China
| | - Ji-Di Fu
- Department of Neurosurgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Ying-Bin Li
- Department of Neurosurgery, the Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Feng-Qi Cui
- Department of Neurosurgery, Beijing Liangxiang Hospital, Beijing, China
| | - Bin Dai
- Department of Neurosurgery, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Guang-Tong Zhu
- Department of Neurosurgery, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Zhi-Yong Xiao
- Department of Neurosurgery, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Bei-Bei Mao
- Department of Neurosurgery, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Zhi-Qiang Hu
- Department of Neurosurgery, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| |
Collapse
|
30
|
Wang J, Junhyoung H, Dupont PE. Steering a Multi-armed Robotic Sheath Using Eccentric Precurved Tubes. IEEE ROBOTICS & AUTOMATION MAGAZINE 2019; 2019:9834-9840. [PMID: 31839700 PMCID: PMC6910658 DOI: 10.1109/icra.2019.8794245] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
This paper presents a novel continuum robot sheath for use in single-port minimally invasive procedures such as neuroendoscopy in which the sheath is designed to deliver multiple robotic arms. Articulation of the sheath is achieved by using precurved superelastic tubes lining the working channels used for arm delivery. These tubes perform a similar role to push/pull tendons, but can accomplish shape change of the sheath via rotation as well as translation. A kinematic model using Cosserat rod theory is derived which is based on modeling the system as a set of eccentrically aligned precurved tubes constrained along their length by an elastic backbone. The specific case of a two-arm sheath is considered in detail and its relationship to a concentric tube balanced pair is described. Simulation and experiment are used to investigate the concept, map its workspace and to evaluate the kinematic model.
Collapse
Affiliation(s)
- Jiaole Wang
- Department of Cardiovascular Surgery, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Ha Junhyoung
- Department of Cardiovascular Surgery, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Pierre E Dupont
- Department of Cardiovascular Surgery, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| |
Collapse
|
31
|
Danilin VE, Letyagin GV, Kim SA, Sysoeva AA, Amelina EV. [Factors of endoscopic third ventriculostomy efficacy in infants with obstructive hydrocephalus under one year of age]. ZHURNAL VOPROSY NEĬROKHIRURGII IMENI N. N. BURDENKO 2019; 82:59-67. [PMID: 30721218 DOI: 10.17116/neiro20188206159] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Endoscopic surgery for obstructive hydrocephalus in children is an alternative to shunts. Currently, the efficacy of endoscopic third ventriculostomy (ETV) in infants up to one year of age is increasingly discussed among neurosurgeons. To increase the efficacy of ETV, many surgeons raise the question: what factors may affect the efficacy of this procedure in the younger age group? OBJECTIVE To study the factors affecting the efficacy of ETV. MATERIAL AND METHODS A total of 88 ETVs were performed in infants under one year of age in our clinic in 2012-2016. Subsequently, 43 (48.9%) children underwent CSF shunting, and one child underwent repeated ETV. The mean time until the appearance of clinical signs of stoma closure was 3.9 months (116 days). RESULTS The procedure was most effective in the case of congenital obstructive hydrocephalus (64.5% of successful operations) and also in children over the age of 6 months (63.6% of successful operations). The efficacy in post-hemorrhagic hydrocephalus was 40%. The efficacy in grade 4 intraventricular hemorrhage was lowest and amounted to 25%. The total efficacy of ETV in children under one year of age in our study was 51.1%. CONCLUSION In the case of congenital obstructive hydrocephalus, the efficacy of ETV is maximal and amounts to 64.5%. To achieve the highest efficacy of ETV in infants under one year of age, careful selection of patients at the preoperative stage is necessary, with allowance for many factors affecting treatment outcome.
Collapse
Affiliation(s)
- V E Danilin
- Federal Center of Neurosurgery, Novosibirsk, Russia
| | - G V Letyagin
- Federal Center of Neurosurgery, Novosibirsk, Russia
| | - S A Kim
- Federal Center of Neurosurgery, Novosibirsk, Russia
| | - A A Sysoeva
- Federal Center of Neurosurgery, Novosibirsk, Russia
| | - E V Amelina
- Institute of Computational Technologies, Novosibirsk, Russia
| |
Collapse
|
32
|
Kanangi SMR, Balasubramaniam C. Shunt infections: a review and analysis of a personal series. Childs Nerv Syst 2018; 34:1915-1924. [PMID: 29978253 DOI: 10.1007/s00381-018-3890-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Accepted: 06/25/2018] [Indexed: 11/29/2022]
Abstract
INTRODUCTION AND PURPOSE CSF diversion shunts are notoriously prone to complications. The most difficult to manage among them is shunt infection, which warrants a prolonged hospital stay. The aim of this paper is to review the pattern of infections, the pathology, and management of shunt infections with special reference to a tertiary pediatric center in a developing country. MATERIALS AND METHODS This is a review of shunt infections in general and a retrospective study of all cases operated in the hospital from 2000 to 2015. RESULTS The authors analyze the data and try to discern patterns, which may enable newer interventions to treat as well as decrease the burden of shunt infections in the future. CONCLUSION It is difficult to determine the true incidence of shunt infections as there is no definition of what constitutes a shunt infection. There are no standardized international guidelines as to how to deal with an infected shunt. Though the ability to treat shunt infection has improved and the incidence of shunt infection has decreased over time, there is still no consensus on the best way to manage it. The prevention is predominantly based on common sense and has helped but a more scientific algorithm is the need of the hour.
Collapse
Affiliation(s)
- Santosh Mohan Rao Kanangi
- Department of Pediatric Neurosurgery, Kanchi Kamakoti CHILDS Trust Hospital, 12 A Nageswara Road Nungambakkam, Chennai 34, 600034, India
| | - Chidambaram Balasubramaniam
- Department of Pediatric Neurosurgery, Kanchi Kamakoti CHILDS Trust Hospital, 12 A Nageswara Road Nungambakkam, Chennai 34, 600034, India.
| |
Collapse
|
33
|
Exploratory Analysis into Reasonable Timeframes for the Provision of Neurosurgical Care in Low- and Middle-Income Countries. World Neurosurg 2018; 117:e679-e691. [DOI: 10.1016/j.wneu.2018.06.111] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 06/12/2018] [Accepted: 06/14/2018] [Indexed: 11/18/2022]
|
34
|
Obungoloch J, Harper JR, Consevage S, Savukov IM, Neuberger T, Tadigadapa S, Schiff SJ. Design of a sustainable prepolarizing magnetic resonance imaging system for infant hydrocephalus. MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE 2018; 31:665-676. [PMID: 29644479 DOI: 10.1007/s10334-018-0683-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Revised: 03/11/2018] [Accepted: 03/15/2018] [Indexed: 10/17/2022]
Abstract
OBJECTIVES The need for affordable and appropriate medical technologies for developing countries continues to rise as challenges such as inadequate energy supply, limited technical expertise, and poor infrastructure persist. Low-field magnetic resonance imaging (LF MRI) is a technology that can be tailored to meet specific imaging needs within such countries. Its low power requirements and the possibility of operating in minimally shielded or unshielded environments make it especially attractive. Although the technology has been widely demonstrated over several decades, it is yet to be shown that it can be diagnostic and improve patient outcomes in clinical applications. We here demonstrate the robustness of prepolarizing MRI (PMRI) technology for assembly and deployment in developing countries for the specific application to infant hydrocephalus. Hydrocephalus treatment planning and management requires only modest spatial resolution, such that the brain can be distinguished from fluid-tissue contrast detail within the brain parenchyma is not essential. MATERIALS AND METHODS We constructed an internally shielded PMRI system based on the Lee-Whiting coil system with a 22-cm diameter of spherical volume. RESULTS In an unshielded room, projection phantom images were acquired at 113 kHz with in-plane resolution of 3 mm × 3 mm, by introducing gradient fields of sufficient magnitude to dominate the 5000 ppm inhomogeneity of the readout field. DISCUSSION The low cost, straightforward assembly, deployment potential, and maintenance requirements demonstrate the suitability of our PMRI system for developing countries. Further improvement in image spatial resolution and contrast of LF MRI will broaden its potential clinical utility beyond hydrocephalus.
Collapse
Affiliation(s)
- Johnes Obungoloch
- Center for Neural Engineering, The Pennsylvania State University, University Park, 16802, USA.,Department of Biomedical Engineering, The Pennsylvania State University, University Park, 16802, USA.,Mbarara University of Science and Technology, P.O Box 1410, Mbarara, Uganda
| | - Joshua R Harper
- Center for Neural Engineering, The Pennsylvania State University, University Park, 16802, USA.,Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, 16802, USA
| | - Steven Consevage
- Center for Neural Engineering, The Pennsylvania State University, University Park, 16802, USA.,Department of Physics, The Pennsylvania State University, University Park, 16802, USA
| | | | - Thomas Neuberger
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, 16802, USA.,The Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, 16802, USA
| | - Srinivas Tadigadapa
- Department of Electrical Engineering, The Pennsylvania State University, University Park, 16802, USA
| | - Steven J Schiff
- Center for Neural Engineering, The Pennsylvania State University, University Park, 16802, USA. .,Department of Biomedical Engineering, The Pennsylvania State University, University Park, 16802, USA. .,Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, 16802, USA. .,Department of Physics, The Pennsylvania State University, University Park, 16802, USA. .,Department of Neurosurgery, Penn State College of Medicine, Hershey, 17033, USA.
| |
Collapse
|
35
|
Ssentongo P, Muwanguzi AJB, Eden U, Sauer T, Bwanga G, Kateregga G, Aribo L, Ojara M, Mugerwa WK, Schiff SJ. Changes in Ugandan Climate Rainfall at the Village and Forest Level. Sci Rep 2018; 8:3551. [PMID: 29476058 PMCID: PMC5824879 DOI: 10.1038/s41598-018-21427-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Accepted: 02/05/2018] [Indexed: 11/09/2022] Open
Abstract
In 2013, the US National Oceanographic and Atmospheric Administration (NOAA) refined the historical rainfall estimates over the African Continent and produced the African Rainfall Climate version 2.0 (ARC2) estimator. ARC2 offers a nearly complete record of daily rainfall estimates since 1983 at 0.1° × 0.1° resolution. Despite short-term anomalies, we identify an overall decrease in average rainfall of about 12% during the past 34 years in Uganda. Spatiotemporally, these decreases are greatest in agricultural regions of central and western Uganda, but similar rainfall decreases are also reflected in the gorilla habitat within the Bwindi Forest in Southwest Uganda. The findings carry significant implications for agriculture production, food security, wildlife habitat, and economic impact at the community and societal level.
Collapse
Affiliation(s)
- Paddy Ssentongo
- Department of Engineering Science and Mechanics, Center for Neural Engineering, PA, University Park, USA
| | | | - Uri Eden
- Department of Mathematics and Statistics, Boston University, Boston, USA
| | - Timothy Sauer
- Department of Mathematics, George Mason University, Fairfax, VA, USA
| | | | | | - Lawrence Aribo
- Ugandan National Meteorological Authority, Kampala, Uganda
| | - Moses Ojara
- Ugandan National Meteorological Authority, Kampala, Uganda
| | | | - Steven J Schiff
- Department of Engineering Science and Mechanics, Center for Neural Engineering, PA, University Park, USA. .,Departments of Neurosurgery and Physics, The Pennsylvania State University, University Park, PA, University Park, USA.
| |
Collapse
|
36
|
Ranjeva SL, Warf BC, Schiff SJ. Economic burden of neonatal sepsis in sub-Saharan Africa. BMJ Glob Health 2018; 3:e000347. [PMID: 29564153 PMCID: PMC5859806 DOI: 10.1136/bmjgh-2017-000347] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Revised: 10/03/2017] [Accepted: 10/25/2017] [Indexed: 11/05/2022] Open
Abstract
Background and significance The third Sustainable Development Goal for child health, which aims to end preventable deaths of newborns and children less than 5 years of age by 2030, cannot be met without substantial reduction of infection-specific neonatal mortality in the developing world. Neonatal infections are estimated to account for 26% of annual neonatal deaths, with mortality rates highest in sub-Saharan Africa (SSA). Reliable and comprehensive estimates of the incidence and aetiology surrounding neonatal sepsis in SSA remain incompletely available. We estimate the economic burden of neonatal sepsis in SSA. Methods Data available through global health agencies and in the medical literature were used to determine population demographics in SSA, as well as to determine the incidence, disease burden, mortality and resulting disabilities associated with neonatal sepsis. The disability-adjusted life years (DALY) associated with successful treatment or prevention of neonatal sepsis in SSA for 1 year were calculated. The value of a statistical life (VSL) methodology was estimated to evaluate the economic burden of untreated neonatal sepsis in SSA. Results We conservatively estimate that 5.29–8.73 million DALYs are lost annually in SSA due to neonatal sepsis. Corresponding VSL estimates predict an annual economic burden ranging from $10 billion to $469 billion. Conclusions Our results highlight and quantify the scope of the public health and economic burden posed by neonatal sepsis in SSA. We quantify the substantial potential impact of more successful treatment and prevention strategies, and we highlight the need for greater investment in strategies to characterise, diagnose, prevent and manage neonatal sepsis and its long-term sequelae in SSA.
Collapse
Affiliation(s)
- Sylvia L Ranjeva
- Medical Scientist Training Program, Pritzker School of Medicine, and Department of Ecology & Evolution, University of Chicago, Chicago, Illinois, USA.,Department of Engineering Science and Mechanics, Center for Neural Engineering, The Pennsylvania State University, University Park, Pennsylvania, USA
| | - Benjamin C Warf
- Department of Neurosurgery, Boston Children's Hospital, Boston, Massachusetts, USA.,Department of Global Health and Social Medicine, Harvard Medical School, Boston, Massachusetts, USA
| | - Steven J Schiff
- Department of Engineering Science and Mechanics, Center for Neural Engineering, The Pennsylvania State University, University Park, Pennsylvania, USA.,Departments of Neurosurgery and Physics, The Pennsylvania State University, University Park, Pennsylvania, USA
| |
Collapse
|
37
|
Kulkarni AV, Schiff SJ, Mbabazi-Kabachelor E, Mugamba J, Ssenyonga P, Donnelly R, Levenbach J, Monga V, Peterson M, MacDonald M, Cherukuri V, Warf BC. Endoscopic Treatment versus Shunting for Infant Hydrocephalus in Uganda. N Engl J Med 2017; 377:2456-2464. [PMID: 29262276 PMCID: PMC5784827 DOI: 10.1056/nejmoa1707568] [Citation(s) in RCA: 94] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
BACKGROUND Postinfectious hydrocephalus in infants is a major health problem in sub-Saharan Africa. The conventional treatment is ventriculoperitoneal shunting, but surgeons are usually not immediately available to revise shunts when they fail. Endoscopic third ventriculostomy with choroid plexus cauterization (ETV-CPC) is an alternative treatment that is less subject to late failure but is also less likely than shunting to result in a reduction in ventricular size that might facilitate better brain growth and cognitive outcomes. METHODS We conducted a randomized trial to evaluate cognitive outcomes after ETV-CPC versus ventriculoperitoneal shunting in Ugandan infants with postinfectious hydrocephalus. The primary outcome was the Bayley Scales of Infant Development, Third Edition (BSID-3), cognitive scaled score 12 months after surgery (scores range from 1 to 19, with higher scores indicating better performance). The secondary outcomes were BSID-3 motor and language scores, treatment failure (defined as treatment-related death or the need for repeat surgery), and brain volume measured on computed tomography. RESULTS A total of 100 infants were enrolled; 51 were randomly assigned to undergo ETV-CPC, and 49 were assigned to undergo ventriculoperitoneal shunting. The median BSID-3 cognitive scores at 12 months did not differ significantly between the treatment groups (a score of 4 for ETV-CPC and 2 for ventriculoperitoneal shunting; Hodges-Lehmann estimated difference, 0; 95% confidence interval [CI], -2 to 0; P=0.35). There was no significant difference between the ETV-CPC group and the ventriculoperitoneal-shunt group in BSID-3 motor or language scores, rates of treatment failure (35% and 24%, respectively; hazard ratio, 0.7; 95% CI, 0.3 to 1.5; P=0.24), or brain volume (z score, -2.4 and -2.1, respectively; estimated difference, 0.3; 95% CI, -0.3 to 1.0; P=0.12). CONCLUSIONS This single-center study involving Ugandan infants with postinfectious hydrocephalus showed no significant difference between endoscopic ETV-CPC and ventriculoperitoneal shunting with regard to cognitive outcomes at 12 months. (Funded by the National Institutes of Health; ClinicalTrials.gov number, NCT01936272 .).
Collapse
Affiliation(s)
- Abhaya V Kulkarni
- From the University of Toronto (A.V.K.) and the Hospital for Sick Children (A.V.K., R.D., J.L.), Toronto; Pennsylvania State University, University Park (S.J.S., V.M., M.P., M.M., V.C.); CURE Children's Hospital of Uganda, Mbale (E.M.-K., J.M., P.S., B.C.W.); and Harvard Medical School and Boston Children's Hospital, Boston (B.C.W.)
| | - Steven J Schiff
- From the University of Toronto (A.V.K.) and the Hospital for Sick Children (A.V.K., R.D., J.L.), Toronto; Pennsylvania State University, University Park (S.J.S., V.M., M.P., M.M., V.C.); CURE Children's Hospital of Uganda, Mbale (E.M.-K., J.M., P.S., B.C.W.); and Harvard Medical School and Boston Children's Hospital, Boston (B.C.W.)
| | - Edith Mbabazi-Kabachelor
- From the University of Toronto (A.V.K.) and the Hospital for Sick Children (A.V.K., R.D., J.L.), Toronto; Pennsylvania State University, University Park (S.J.S., V.M., M.P., M.M., V.C.); CURE Children's Hospital of Uganda, Mbale (E.M.-K., J.M., P.S., B.C.W.); and Harvard Medical School and Boston Children's Hospital, Boston (B.C.W.)
| | - John Mugamba
- From the University of Toronto (A.V.K.) and the Hospital for Sick Children (A.V.K., R.D., J.L.), Toronto; Pennsylvania State University, University Park (S.J.S., V.M., M.P., M.M., V.C.); CURE Children's Hospital of Uganda, Mbale (E.M.-K., J.M., P.S., B.C.W.); and Harvard Medical School and Boston Children's Hospital, Boston (B.C.W.)
| | - Peter Ssenyonga
- From the University of Toronto (A.V.K.) and the Hospital for Sick Children (A.V.K., R.D., J.L.), Toronto; Pennsylvania State University, University Park (S.J.S., V.M., M.P., M.M., V.C.); CURE Children's Hospital of Uganda, Mbale (E.M.-K., J.M., P.S., B.C.W.); and Harvard Medical School and Boston Children's Hospital, Boston (B.C.W.)
| | - Ruth Donnelly
- From the University of Toronto (A.V.K.) and the Hospital for Sick Children (A.V.K., R.D., J.L.), Toronto; Pennsylvania State University, University Park (S.J.S., V.M., M.P., M.M., V.C.); CURE Children's Hospital of Uganda, Mbale (E.M.-K., J.M., P.S., B.C.W.); and Harvard Medical School and Boston Children's Hospital, Boston (B.C.W.)
| | - Jody Levenbach
- From the University of Toronto (A.V.K.) and the Hospital for Sick Children (A.V.K., R.D., J.L.), Toronto; Pennsylvania State University, University Park (S.J.S., V.M., M.P., M.M., V.C.); CURE Children's Hospital of Uganda, Mbale (E.M.-K., J.M., P.S., B.C.W.); and Harvard Medical School and Boston Children's Hospital, Boston (B.C.W.)
| | - Vishal Monga
- From the University of Toronto (A.V.K.) and the Hospital for Sick Children (A.V.K., R.D., J.L.), Toronto; Pennsylvania State University, University Park (S.J.S., V.M., M.P., M.M., V.C.); CURE Children's Hospital of Uganda, Mbale (E.M.-K., J.M., P.S., B.C.W.); and Harvard Medical School and Boston Children's Hospital, Boston (B.C.W.)
| | - Mallory Peterson
- From the University of Toronto (A.V.K.) and the Hospital for Sick Children (A.V.K., R.D., J.L.), Toronto; Pennsylvania State University, University Park (S.J.S., V.M., M.P., M.M., V.C.); CURE Children's Hospital of Uganda, Mbale (E.M.-K., J.M., P.S., B.C.W.); and Harvard Medical School and Boston Children's Hospital, Boston (B.C.W.)
| | - Michael MacDonald
- From the University of Toronto (A.V.K.) and the Hospital for Sick Children (A.V.K., R.D., J.L.), Toronto; Pennsylvania State University, University Park (S.J.S., V.M., M.P., M.M., V.C.); CURE Children's Hospital of Uganda, Mbale (E.M.-K., J.M., P.S., B.C.W.); and Harvard Medical School and Boston Children's Hospital, Boston (B.C.W.)
| | - Venkateswararao Cherukuri
- From the University of Toronto (A.V.K.) and the Hospital for Sick Children (A.V.K., R.D., J.L.), Toronto; Pennsylvania State University, University Park (S.J.S., V.M., M.P., M.M., V.C.); CURE Children's Hospital of Uganda, Mbale (E.M.-K., J.M., P.S., B.C.W.); and Harvard Medical School and Boston Children's Hospital, Boston (B.C.W.)
| | - Benjamin C Warf
- From the University of Toronto (A.V.K.) and the Hospital for Sick Children (A.V.K., R.D., J.L.), Toronto; Pennsylvania State University, University Park (S.J.S., V.M., M.P., M.M., V.C.); CURE Children's Hospital of Uganda, Mbale (E.M.-K., J.M., P.S., B.C.W.); and Harvard Medical School and Boston Children's Hospital, Boston (B.C.W.)
| |
Collapse
|
38
|
Kumar V, Bodeliwala S, Singh D. Controversy about Management of Hydrocephalus - Shunt vs. Endoscopic Third Ventriculostomy. Indian J Pediatr 2017; 84:624-628. [PMID: 28401404 DOI: 10.1007/s12098-017-2338-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Accepted: 03/09/2017] [Indexed: 10/19/2022]
Abstract
The best management of hydrocephalus is still controversial in the twenty-first century. Shunt treatment for hydrocephalus is the most common procedure performed in neurosurgical practice and is associated with the highest complications rate. But during the last 2 decades, the treatment of hydrocephalus has improved with better shunt devices available today, increased facilities for investigations and newer approaches like endoscopic third ventriculostomy. The recent advances in development of better endoscopes have provided the patient and treating doctor with an option for an alternative surgery for treatment of hydrocephalus.
Collapse
Affiliation(s)
- Vikas Kumar
- Department of Neurosurgery, G. B. Pant Institute of Postgraduate Medical Education and Research, New Delhi, 110002, India
| | - Shaam Bodeliwala
- Department of Neurosurgery, G. B. Pant Institute of Postgraduate Medical Education and Research, New Delhi, 110002, India
| | - Daljit Singh
- Department of Neurosurgery, G. B. Pant Institute of Postgraduate Medical Education and Research, New Delhi, 110002, India.
| |
Collapse
|
39
|
Laeke T, Tirsit A, Biluts H, Murali D, Wester K. Pediatric Hydrocephalus in Ethiopia: Treatment Failures and Infections: A Hospital-Based, Retrospective Study. World Neurosurg 2017; 100:30-37. [DOI: 10.1016/j.wneu.2016.12.112] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Revised: 12/23/2016] [Accepted: 12/24/2016] [Indexed: 10/20/2022]
|
40
|
Manjila S, Mencattelli M, Rosa B, Price K, Fagogenis G, Dupont PE. A multiport MR-compatible neuroendoscope: spanning the gap between rigid and flexible scopes. Neurosurg Focus 2017; 41:E13. [PMID: 27581309 DOI: 10.3171/2016.7.focus16181] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Rigid endoscopes enable minimally invasive access to the ventricular system; however, the operative field is limited to the instrument tip, necessitating rotation of the entire instrument and causing consequent tissue compression while reaching around corners. Although flexible endoscopes offer tip steerability to address this limitation, they are more difficult to control and provide fewer and smaller working channels. A middle ground between these instruments-a rigid endoscope that possesses multiple instrument ports (for example, one at the tip and one on the side)-is proposed in this article, and a prototype device is evaluated in the context of a third ventricular colloid cyst resection combined with septostomy. METHODS A prototype neuroendoscope was designed and fabricated to include 2 optical ports, one located at the instrument tip and one located laterally. Each optical port includes its own complementary metal-oxide semiconductor (CMOS) chip camera, light-emitting diode (LED) illumination, and working channels. The tip port incorporates a clear silicone optical window that provides 2 additional features. First, for enhanced safety during tool insertion, instruments can be initially seen inside the window before they extend from the scope tip. Second, the compliant tip can be pressed against tissue to enable visualization even in a blood-filled field. These capabilities were tested in fresh porcine brains. The image quality of the multiport endoscope was evaluated using test targets positioned at clinically relevant distances from each imaging port, comparing it with those of clinical rigid and flexible neuroendoscopes. Human cadaver testing was used to demonstrate third ventricular colloid cyst phantom resection through the tip port and a septostomy performed through the lateral port. To extend its utility in the treatment of periventricular tumors using MR-guided laser therapy, the device was designed to be MR compatible. Its functionality and compatibility inside a 3-T clinical scanner were also tested in a brain from a freshly euthanized female pig. RESULTS Testing in porcine brains confirmed the multiport endoscope's ability to visualize tissue in a blood-filled field and to operate inside a 3-T MRI scanner. Cadaver testing confirmed the device's utility in operating through both of its ports and performing combined third ventricular colloid cyst resection and septostomy with an endoscope rotation of less than 5°. CONCLUSIONS The proposed design provides freedom in selecting both the number and orientation of imaging and instrument ports, which can be customized for each ventricular pathological entity. The lightweight, easily manipulated device can provide added steerability while reducing the potential for the serious brain distortion that happens with rigid endoscope navigation. This capability would be particularly valuable in treating hydrocephalus, both primary and secondary (due to tumors, cysts, and so forth). Magnetic resonance compatibility can aid in endoscope-assisted ventricular aqueductal plasty and stenting, the management of multiloculated complex hydrocephalus, and postinflammatory hydrocephalus in which scarring obscures the ventricular anatomy.
Collapse
Affiliation(s)
- Sunil Manjila
- Department of Cardiovascular Surgery, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Margherita Mencattelli
- Department of Cardiovascular Surgery, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Benoit Rosa
- Department of Cardiovascular Surgery, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Karl Price
- Department of Cardiovascular Surgery, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Georgios Fagogenis
- Department of Cardiovascular Surgery, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Pierre E Dupont
- Department of Cardiovascular Surgery, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts
| |
Collapse
|
41
|
Bean JR. Profits and Charitable Missions: Funding Volunteerism in the Developing World. World Neurosurg 2017; 99:784-785. [DOI: 10.1016/j.wneu.2016.10.130] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 10/26/2016] [Indexed: 11/30/2022]
|
42
|
Management of Hydrocephalus with Ventriculoperitoneal Shunts: Review of 109 Cases of Children. World Neurosurg 2016; 96:129-135. [DOI: 10.1016/j.wneu.2016.06.111] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Revised: 06/25/2016] [Accepted: 06/27/2016] [Indexed: 02/07/2023]
|
43
|
He L, Gannon S, Shannon CN, Rocque BG, Riva-Cambrin J, Naftel RP. Surgeon interrater reliability in the endoscopic assessment of cistern scarring and aqueduct patency. J Neurosurg Pediatr 2016; 18:320-4. [PMID: 27231825 PMCID: PMC5434973 DOI: 10.3171/2016.3.peds15648] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE The success of endoscopic third ventriculostomy with choroid plexus cauterization may have associations with age, etiology of hydrocephalus, previous shunting, cisternal scarring, and possibly aqueduct patency. This study aimed to measure interrater reliability among surgeons in identifying cisternal scarring and aqueduct patency. METHODS Using published definitions of cistern scarring and aqueduct patency, 7 neuroendoscopists with training from Dr. Warf in Uganda and 7 neuroendoscopists who were not trained by Dr. Warf rated cistern status from 30 operative videos and aqueduct patency from 26 operative videos. Interrater agreement was calculated using Fleiss' kappa coefficient (κ). Fisher's 2-tailed exact test was used to identify differences in the rates of agreement between the Warf-trained and nontrained groups compared with Dr. Warf's reference answer. RESULTS Aqueduct status, among all raters, showed substantial agreement with κ = 0.663 (confidence interval [CI] 0.626-0.701); within the trained group and nontrained groups, there was substantial agreement with κ = 0.677 (CI 0.593-0.761) and κ = 0.631 (CI 0.547-0.715), respectively. The identification of cistern scarring was less reliable, with moderate agreement among all raters with κ = 0.536 (CI 0.501-0.571); within the trained group and nontrained groups, there was moderate agreement with κ = 0.555 (CI 0.477-0.633) and κ = 0.542 (CI 0.464-0.620), respectively. There was no statistically significant difference in the amount of agreement between groups compared with Dr. Warf's reference. CONCLUSIONS Regardless of training with Dr. Warf, all neuroendoscopists could identify scarred cisterns and aqueduct patency with similar reliability, emphasizing the strength of the published definitions. This makes the identification of this risk factor for failure generalizable for surgical decision making and research studies.
Collapse
Affiliation(s)
- Lucy He
- Department of Neurological Surgery, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Stephen Gannon
- Department of Neurological Surgery, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Chevis N. Shannon
- Department of Neurological Surgery, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Brandon G Rocque
- Pediatric Neurosurgery, Department of Neurosurgery, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Jay Riva-Cambrin
- Division of Pediatric Neurosurgery, Department of Clinical Neurosciences, Alberta Children’s Hospital, Calgary, AB, UCanada
| | - Robert P. Naftel
- Department of Neurological Surgery, Vanderbilt University Medical Center, Nashville, TN, USA
| |
Collapse
|
44
|
Lam S, Harris DA, Lin Y, Rocque BG, Ham S, Pan IW. Outcomes of endoscopic third ventriculostomy in adults. J Clin Neurosci 2016; 31:166-71. [PMID: 27394377 DOI: 10.1016/j.jocn.2016.03.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Accepted: 03/08/2016] [Indexed: 11/27/2022]
Abstract
Endoscopic third ventriculostomy (ETV) is an alternative to ventriculoperitoneal shunting for treatment of hydrocephalus. Studies have reported favorable outcomes for up to three-quarters of adult patients. We performed the first ETV outcomes study using an administrative claims database, examining current practice for adult patients in the United States. We interrogated the Truven Health MarketScan® database for Current Procedural Terminology codes corresponding to ETV and ventriculoperitoneal shunt from 2003- to 2011, including patients over 18years and data from initial and subsequent hospitalizations. ETV failure was defined as any subsequent ETV or shunt procedure. Five hundred twenty-five patients underwent ETV with 6months minimum follow-up. Mean age was 45.9years (range: 18-86years). Mean follow-up was 2.2years (SD: 1.6years, range: 0.5-8.4years). Etiology of hydrocephalus was 21.3% tumor, 9.0% congenital/aqueductal stenosis, 15.8% hemorrhage, and 53.9% others. ETV was successful in 74.7% of patients. Of 133 who failed, 25 had repeat ETV; 108 had shunt placement. Longer length of stay for index surgery was associated with higher risk of failure (hazard ratio (HR): 1.03, p<0.001), as was history of previous shunt (HR: 2.45, p<0.001). Among patients with repeat surgeries, median time to failure was 25days. This study represents a longitudinal analysis of nationwide ETV practice over 9years. Success rate in this large cohort is similar to that published by other single-center retrospective studies. Age and geographic variation may be associated with surgeon choice of ETV or shunt placement after failure of the initial ETV.
Collapse
Affiliation(s)
- Sandi Lam
- Department of Neurosurgery, Baylor College of Medicine, Texas Children's Hospital, Department of Neurosurgery, 6701 Fannin St., Ste. 1230-01, Houston, TX 77030, USA.
| | - Dominic A Harris
- Department of Neurosurgery, Baylor College of Medicine, Texas Children's Hospital, Department of Neurosurgery, 6701 Fannin St., Ste. 1230-01, Houston, TX 77030, USA
| | - Yimo Lin
- Department of Neurosurgery, Baylor College of Medicine, Texas Children's Hospital, Department of Neurosurgery, 6701 Fannin St., Ste. 1230-01, Houston, TX 77030, USA
| | - Brandon G Rocque
- Department of Neurosurgery, Section of Pediatric Neurosurgery, University of Alabama at Birmingham, AL 35294, USA
| | - Sandra Ham
- University of Chicago, Center for Health and Social Sciences, Chicago, IL 60637, USA
| | - I-Wen Pan
- Department of Neurosurgery, Baylor College of Medicine, Texas Children's Hospital, Department of Neurosurgery, 6701 Fannin St., Ste. 1230-01, Houston, TX 77030, USA
| |
Collapse
|
45
|
Eriksen AA, Johnsen JS, Tennøe AH, Tirsit A, Laeke T, Amare EB, Wester K. Implementing Routine Head Circumference Measurements in Addis Ababa, Ethiopia: Means and Challenges. World Neurosurg 2016; 91:592-596.e2. [DOI: 10.1016/j.wneu.2016.04.132] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 04/29/2016] [Accepted: 04/30/2016] [Indexed: 11/26/2022]
|
46
|
Schiff SJ, Kiwanuka J, Riggio G, Nguyen L, Mu K, Sproul E, Bazira J, Mwanga-Amumpaire J, Tumusiime D, Nyesigire E, Lwanga N, Bogale KT, Kapur V, Broach JR, Morton SU, Warf BC, Poss M. Separating Putative Pathogens from Background Contamination with Principal Orthogonal Decomposition: Evidence for Leptospira in the Ugandan Neonatal Septisome. Front Med (Lausanne) 2016; 3:22. [PMID: 27379237 PMCID: PMC4904006 DOI: 10.3389/fmed.2016.00022] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 05/09/2016] [Indexed: 11/23/2022] Open
Abstract
Neonatal sepsis (NS) is responsible for over 1 million yearly deaths worldwide. In the developing world, NS is often treated without an identified microbial pathogen. Amplicon sequencing of the bacterial 16S rRNA gene can be used to identify organisms that are difficult to detect by routine microbiological methods. However, contaminating bacteria are ubiquitous in both hospital settings and research reagents and must be accounted for to make effective use of these data. In this study, we sequenced the bacterial 16S rRNA gene obtained from blood and cerebrospinal fluid (CSF) of 80 neonates presenting with NS to the Mbarara Regional Hospital in Uganda. Assuming that patterns of background contamination would be independent of pathogenic microorganism DNA, we applied a novel quantitative approach using principal orthogonal decomposition to separate background contamination from potential pathogens in sequencing data. We designed our quantitative approach contrasting blood, CSF, and control specimens and employed a variety of statistical random matrix bootstrap hypotheses to estimate statistical significance. These analyses demonstrate that Leptospira appears present in some infants presenting within 48 h of birth, indicative of infection in utero, and up to 28 days of age, suggesting environmental exposure. This organism cannot be cultured in routine bacteriological settings and is enzootic in the cattle that often live in close proximity to the rural peoples of western Uganda. Our findings demonstrate that statistical approaches to remove background organisms common in 16S sequence data can reveal putative pathogens in small volume biological samples from newborns. This computational analysis thus reveals an important medical finding that has the potential to alter therapy and prevention efforts in a critically ill population.
Collapse
Affiliation(s)
- Steven J Schiff
- Center for Neural Engineering, Pennsylvania State University, University Park, PA, USA; Department of Neurosurgery, Penn State College of Medicine, Hershey, PA, USA; Department of Engineering Science and Mechanics, Pennsylvania State University, University Park, PA, USA; Department of Physics, Pennsylvania State University, University Park, PA, USA
| | - Julius Kiwanuka
- Department of Pediatrics, Mbarara University of Science and Technology , Mbarara , Uganda
| | - Gina Riggio
- Department of Biology, Pennsylvania State University, University Park, PA, USA; Department of Veterinary and Biomedical Sciences, Pennsylvania State University, University Park, PA, USA
| | - Lan Nguyen
- Department of Biology, Pennsylvania State University, University Park, PA, USA; Department of Veterinary and Biomedical Sciences, Pennsylvania State University, University Park, PA, USA; Department of Biochemistry and Molecular Biology, Institute for Personalized Medicine, Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - Kevin Mu
- Department of Biology, Pennsylvania State University, University Park, PA, USA; Department of Veterinary and Biomedical Sciences, Pennsylvania State University, University Park, PA, USA
| | - Emily Sproul
- Department of Biology, Pennsylvania State University, University Park, PA, USA; Department of Veterinary and Biomedical Sciences, Pennsylvania State University, University Park, PA, USA
| | - Joel Bazira
- Department of Microbiology, Mbarara University of Science and Technology , Mbarara , Uganda
| | - Juliet Mwanga-Amumpaire
- Department of Pediatrics, Mbarara University of Science and Technology, Mbarara, Uganda; Epicentre Mbarara Research Centre, Mbarara, Uganda
| | - Dickson Tumusiime
- Department of Pediatrics, Mbarara University of Science and Technology , Mbarara , Uganda
| | - Eunice Nyesigire
- Department of Pediatrics, Mbarara University of Science and Technology , Mbarara , Uganda
| | - Nkangi Lwanga
- Department of Microbiology, Mbarara University of Science and Technology , Mbarara , Uganda
| | - Kaleb T Bogale
- Center for Neural Engineering, Pennsylvania State University, University Park, PA, USA; Schreyer's Honors College, Pennsylvania State University, University Park, PA, USA
| | - Vivek Kapur
- Department of Veterinary and Biomedical Sciences, Pennsylvania State University , University Park, PA , USA
| | - James R Broach
- Department of Biochemistry and Molecular Biology, Institute for Personalized Medicine, Pennsylvania State University College of Medicine , Hershey, PA , USA
| | - Sarah U Morton
- Center for Neural Engineering, Pennsylvania State University, University Park, PA, USA; Harvard Neonatal-Perinatal Training Program, Children's Hospital Boston, Boston, MA, USA
| | - Benjamin C Warf
- Department of Neurosurgery, Harvard Medical School, Boston Children's Hospital, Boston, MA, USA; Department of Global Health and Social Medicine, Harvard Medical School, Boston Children's Hospital, Boston, MA, USA; CURE Children's Hospital of Uganda, Mbale, Uganda
| | - Mary Poss
- Department of Biology, Pennsylvania State University, University Park, PA, USA; Department of Veterinary and Biomedical Sciences, Pennsylvania State University, University Park, PA, USA
| |
Collapse
|
47
|
Haddadi K. Pediatric Endoscopic Third Ventriculostomy: A Narrative Review of Current Indications, Techniques and Complications. JOURNAL OF PEDIATRICS REVIEW 2016. [DOI: 10.17795/jpr-5074] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
|
48
|
Neff LP, Cannon JW, Charnock KM, Farmer DL, Borgman MA, Ricca RL. Elective pediatric surgical care in a forward deployed setting: What is feasible vs. what is reasonable. J Pediatr Surg 2016; 51:409-15. [PMID: 26585881 DOI: 10.1016/j.jpedsurg.2015.08.060] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2015] [Revised: 08/14/2015] [Accepted: 08/15/2015] [Indexed: 11/18/2022]
Abstract
OBJECTIVE To describe the scope and outcomes of elective pediatric surgical procedures performed during combat operations. BACKGROUND The care of patients in Operation Enduring Freedom (OEF) includes elective humanitarian surgery on Afghan children. Unlike military reports of pediatric trauma care, there is little outcome data on elective pediatric surgical care during combat operations to guide treatment decisions. METHODS All elective surgical procedures performed on patients≤16years of age from May 2012 through April 2014 were reviewed. Procedures were grouped by surgical specialty and were further classified as single-stage (SINGLE) or multi-stage (MULTI). The primary endpoint was post-operative complications requiring further surgery, and the secondary endpoint was post-operative follow up. RESULTS A total of 311 elective pediatric surgical procedures were performed on 239 patients. Surgical specialties included general surgery, orthopedics, otolaryngology, ophthalmology, neurosurgery and urology. 178 (57%) were SINGLE while 133 (43%) were MULTI. Fifteen patients required 32 procedures for post-operative complications. Approximately half of all procedures were performed as outpatient surgery. Median length of stay for inpatient was 2.2days, and all patients survived to discharge. The majority of patients returned for outpatient follow-up (207, 87%), and 4 patients (1.7%) died after discharge. CONCLUSIONS Elective pediatric surgical care in a forward deployed setting is feasible; however, limitations in resources for perioperative care and rehabilitation mandate prudent patient selection particularly with respect to procedures that require prolonged post-operative care. Formal guidance on the process of patient selection for elective humanitarian surgery in these settings is needed.
Collapse
Affiliation(s)
- Lucas P Neff
- Department of Surgery, David Grant Medical Center, 101 Bodin Circle, Travis Air Force Base, California 94535; Department of Surgery, UC Davis Medical Center, 2315 Stockton Blvd. Sacramento, California 95817; Department of Surgery, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, Maryland 20814.
| | - Jeremy W Cannon
- Department of Surgery, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, Maryland 20814; Department of Surgery, Perelman School of Medicine at the University of Pennsylvania, 3400 Spruce St, Philadelphia, Pennsylvania 19104.
| | - Kathryn M Charnock
- Department of Pediatrics, San Antonio Military Medical Center, 3551 Roger Brooke Dr. JBSA, Fort Sam Houston, Texas 78234.
| | - Diana L Farmer
- Department of Surgery, UC Davis Medical Center, 2315 Stockton Blvd. Sacramento, California 95817.
| | - Matthew A Borgman
- Department of Pediatrics, San Antonio Military Medical Center, 3551 Roger Brooke Dr. JBSA, Fort Sam Houston, Texas 78234; Department of Pediatrics, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, Maryland 20814.
| | - Robert L Ricca
- Department of Surgery, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, Maryland 20814; Department of Surgery, Naval Medical Center Portsmouth, 620 John Paul Jones Circle, Portsmouth, Virginia 23708.
| |
Collapse
|
49
|
Lother S, Schiff SJ, Neuberger T, Jakob PM, Fidler F. Design of a mobile, homogeneous, and efficient electromagnet with a large field of view for neonatal low-field MRI. MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE 2016; 29:691-8. [PMID: 26861046 DOI: 10.1007/s10334-016-0525-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2015] [Revised: 12/31/2015] [Accepted: 01/05/2016] [Indexed: 11/28/2022]
Abstract
OBJECTIVE In this work, a prototype of an effective electromagnet with a field-of-view (FoV) of 140 mm for neonatal head imaging is presented. The efficient implementation succeeded by exploiting the use of steel plates as a housing system. We achieved a compromise between large sample volumes, high homogeneity, high B0 field, low power consumption, light weight, simple fabrication, and conserved mobility without the necessity of a dedicated water cooling system. MATERIALS AND METHODS The entire magnetic resonance imaging (MRI) system (electromagnet, gradient system, transmit/receive coil, control system) is introduced and its unique features discussed. Furthermore, simulations using a numerical optimization algorithm for magnet and gradient system are presented. RESULTS Functionality and quality of this low-field scanner operating at 23 mT (generated with 500 W) is illustrated using spin-echo imaging (in-plane resolution 1.6 mm × 1.6 mm, slice thickness 5 mm, and signal-to-noise ratio (SNR) of 23 with a acquisition time of 29 min). B0 field-mapping measurements are presented to characterize the homogeneity of the magnet, and the B0 field limitations of 80 mT of the system are fully discussed. CONCLUSION The cryogen-free system presented here demonstrates that this electromagnet with a ferromagnetic housing can be optimized for MRI with an enhanced and homogeneous magnetic field. It offers an alternative to prepolarized MRI designs in both readout field strength and power use. There are multiple indications for the clinical medical application of such low-field devices.
Collapse
Affiliation(s)
- Steffen Lother
- Research Center Magnetic-Resonance-Bavaria (MRB), Am Hubland, 97074, Würzburg, Germany.
| | - Steven J Schiff
- Departments of Engineering Science and Mechanics, Neurosurgery, and Physics, Center of Neural Engineering, Penn State University, University Park, PA, USA
| | - Thomas Neuberger
- High Field MRI Facility, Huck Institutes of the Life Sciences, Penn State University, University Park, PA, USA.,Department of Biomedical Engineering, Penn State University, University Park, PA, USA
| | - Peter M Jakob
- Research Center Magnetic-Resonance-Bavaria (MRB), Am Hubland, 97074, Würzburg, Germany.,Department for Experimental Physics 5 (Biophysics), University of Wuerzburg, Würzburg, Germany
| | - Florian Fidler
- Research Center Magnetic-Resonance-Bavaria (MRB), Am Hubland, 97074, Würzburg, Germany
| |
Collapse
|
50
|
Reducing neurodevelopmental disorders and disability through research and interventions. Nature 2015; 527:S155-60. [PMID: 26580321 DOI: 10.1038/nature16029] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We define neurodevelopment as the dynamic inter-relationship between genetic, brain, cognitive, emotional and behavioural processes across the developmental lifespan. Significant and persistent disruption to this dynamic process through environmental and genetic risk can lead to neurodevelopmental disorders and disability. Research designed to ameliorate neurodevelopmental disorders in low- and middle-income countries, as well as globally, will benefit enormously from the ongoing advances in understanding their genetic and epigenetic causes, as modified by environment and culture. We provide examples of advances in the prevention and treatment of, and the rehabilitation of those with, neurodevelopment disorders in low- and middle-income countries, along with opportunities for further strategic research initiatives. Our examples are not the only possibilities for strategic research, but they illustrate problems that, when solved, could have a considerable impact in low-resource settings. In each instance, research in low- and middle-income countries led to innovations in identification, surveillance and treatment of a neurodevelopmental disorder. These innovations have also been integrated with genotypic mapping of neurodevelopmental disorders, forming important preventative and rehabilitative interventions with the potential for high impact. These advances will ultimately allow us to understand how epigenetic influences shape neurodevelopmental risk and resilience over time and across populations. Clearly, the most strategic areas of research opportunity involve cross-disciplinary integration at the intersection between the environment, brain or behaviour neurodevelopment, and genetic and epigenetic science. At these junctions a robust integrative cross-disciplinary scientific approach is catalysing the creation of technologies and interventions for old problems. Such approaches will enable us to achieve and sustain the United Nations moral and legal mandate for child health and full development as a basic global human right.
Collapse
|