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de Moraes FM, Brasil S, Frigieri G, Robba C, Paiva W, Silva GS. ICP wave morphology as a screening test to exclude intracranial hypertension in brain-injured patients: a non-invasive perspective. J Clin Monit Comput 2024:10.1007/s10877-023-01120-3. [PMID: 38355918 DOI: 10.1007/s10877-023-01120-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Accepted: 12/15/2023] [Indexed: 02/16/2024]
Abstract
Intracranial hypertension (IH) is a life-threating condition especially for the brain injured patient. In such cases, an external ventricular drain (EVD) or an intraparenchymal bolt are the conventional gold standard for intracranial pressure (ICPi) monitoring. However, these techniques have several limitations. Therefore, identifying an ideal screening method for IH is important to avoid the unnecessary placement of ICPi and expedite its introduction in patients who require it. A potential screening tool is the ICP wave morphology (ICPW) which changes according to the intracranial volume-pressure curve. Specifically, the P2/P1 ratio of the ICPW has shown promise as a triage test to indicate normal ICP. In this study, we propose evaluating the noninvasive ICPW (nICPW-B4C sensor) as a screening method for ICPi monitoring in patients with moderate to high probability of IH. This is a retrospective analysis of a prospective, multicenter study that recruited adult patients requiring ICPi monitoring from both Federal University of São Paulo and University of São Paulo Medical School Hospitals. ICPi values and the nICPW parameters were obtained from both the invasive and the noninvasive methods simultaneously 5 min after the closure of the EVD drainage. ICP assessment was performed using a catheter inserted into the ventricle and connected to a pressure transducer and a drainage system. The B4C sensor was positioned on the patient's scalp without the need for trichotomy, surgical incision or trepanation, and the morphology of the ICP waves acquired through a strain sensor that can detect and monitor skull bone deformations caused by changes in ICP. All patients were monitored using this noninvasive system for at least 10 min per session. The area under the curve (AUC) was used to describe discriminatory power of the P2/P1 ratio for IH, with emphasis in the Negative Predictive value (NPV), based on the Youden index, and the negative likelihood ratio [LR-]. Recruitment occurred from August 2017 to March 2020. A total of 69 patients fulfilled inclusion and exclusion criteria in the two centers and a total of 111 monitorizations were performed. The mean P2/P1 ratio value in the sample was 1.12. The mean P2/P1 value in the no IH population was 1.01 meanwhile in the IH population was 1.32 (p < 0.01). The best Youden index for the mean P2/P1 ratio was with a cut-off value of 1.13 showing a sensitivity of 93%, specificity of 60%, and a NPV of 97%, as well as an AUC of 0.83 to predict IH. With the 1.13 cut-off value for P2/P1 ratio, the LR- for IH was 0.11, corresponding to a strong performance in ruling out the condition (IH), with an approximate 45% reduction in condition probability after a negative test (ICPW). To conclude, the P2/P1 ratio of the noninvasive ICP waveform showed in this study a high Negative Predictive Value and Likelihood Ratio in different acute neurological conditions to rule out IH. As a result, this parameter may be beneficial in situations where invasive methods are not feasible or unavailable and to screen high-risk patients for potential invasive ICP monitoring.Trial registration: At clinicaltrials.gov under numbers NCT05121155 (Registered 16 November 2021-retrospectively registered) and NCT03144219 (Registered 30 September 2022-retrospectively registered).
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Affiliation(s)
| | - Sérgio Brasil
- Division of Neurosurgery, Department of Neurology, University of São Paulo School of Medicine, São Paulo, Brazil
| | - Gustavo Frigieri
- Medical Investigation Laboratory 62, University of São Paulo School of Medicine, São Paulo, Brazil
| | - Chiara Robba
- Anesthesia and Intensive Care, Ospedale Policlinico San Martino, IRCCS Per L'Oncologia E Le Neuroscienze, Genoa, Italy
| | - Wellingson Paiva
- Division of Neurosurgery, Department of Neurology, University of São Paulo School of Medicine, São Paulo, Brazil
| | - Gisele Sampaio Silva
- Department of Neurology and Neurosurgery, Federal University of São Paulo, São Paulo, Brazil
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Brasil S, Godoy DA, Paiva WS. Doing More with Less on Intracranial Pressure Monitoring. World Neurosurg 2023; 178:93-95. [PMID: 37482089 DOI: 10.1016/j.wneu.2023.07.055] [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: 07/09/2023] [Accepted: 07/12/2023] [Indexed: 07/25/2023]
Abstract
BACKGROUND Intracranial pressure (ICP) management based on predetermined thresholds is not accurate in light of recent research on cerebrovascular physiology. Interpersonal and intrapersonal variations will lead ICP elevations to reach individualized thresholds for intracranial compliance impairment from one subject to another. Therefore reuniting the modern techniques of neuromonitoring besides ICP enables practitioners to have a more whole picture in anticipating neuro worsening and improving timing in decision making. METHODS Brief literature review. RESULTS For the severely brain-injured patient, current evidence indicates a personalized and physiology-based multimodal monitoring care to be required rather than decision making according to ICP predetermined cut-offs. CONCLUSIONS The authors' point of view is of particular importance for regions with resource heterogeneity and scarcity, where ICP monitoring is not available for all those in need and noninvasive techniques may provide a surrogate approach. If physicians who deal with acute-brain-injured patients in lower-resource areas understand that several tools besides ICP may improve their practice, it is possible to reduce acute brain injury morbimortality.
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Affiliation(s)
- Sérgio Brasil
- Division of Neurosurgery, Department of Neurology, School of Medicine University of São Paulo, São Paulo, Brazil.
| | - Daniel A Godoy
- Medical Director of Neurointensive Care Unit, Sanatório Pasteur, Catamarca, Argentina
| | - Wellingson S Paiva
- Division of Neurosurgery, Department of Neurology, School of Medicine University of São Paulo, São Paulo, Brazil
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Chandankhede AR, Thombre SD, Shukla D. Correlating Intracranial Pressure Following Decompressive Craniectomy With Neurological Outcomes in Severe Traumatic Brain Injury Patients: A Prospective Observational Study. Cureus 2023; 15:e40119. [PMID: 37425601 PMCID: PMC10329403 DOI: 10.7759/cureus.40119] [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: 06/08/2023] [Indexed: 07/11/2023] Open
Abstract
Introduction Decompressive craniectomies have been performed in settings with raised intracranial pressure (ICP) after severe traumatic brain injury (TBI). A decompressive craniectomy (DC) is an important salvage procedure for intracranial hypertension. The changes in the intracranial microenvironment after a primary DC are significant in terms of the neurological outcome in the postoperative period. Materials and methods The study comprised 68 patients with severe TBIs who were undergoing primary DC; of these, 59% were male. Recorded data include demographic profiles, clinical features, and cranial computed tomography (CT) scans. All patients underwent a primary unilateral DC with augmentation duraplasty. Intracranial pressure was recorded in the first 24 hours at regular intervals, and the outcome was recorded using the Extended Glasgow Outcome Scale (GOS-E) at two-week and two-month intervals. Results Road traffic accidents (RTAs) are the most common cause of severe TBIs. Imaging studies and intraoperative findings suggest that acute subdural hematomas (SDHs) are the most common pathology leading to high ICP in the postoperative period. Mortality was strongly statistically associated with high ICP values postoperatively at all intervals. The average ICP for the patients who died was 11.871 mmHg higher than the patients who survived (p=0.0009). The Glasgow Coma Scale (GCS) at the time of admission is positively correlated with the neurological outcome at two weeks and two months, with a Pearson correlation coefficient of 0.4190 and 0.4235, respectively. There is a strong negative correlation between ICP in the postoperative period and the neurological outcome at two weeks and two months (Pearson correlation coefficients are -0.828 and -0.841, respectively). Conclusion The results indicate that RTAs are the most common cause of severe TBIs, and acute SDHs are the most common pathology leading to high ICP after the surgery. ICP values in the postoperative period have a strong negative correlation with survival and neurological outcome. Preoperative GCS and postoperative ICP monitoring are important methods of prognostication and planning further management.
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Affiliation(s)
| | - Snehal D Thombre
- Anesthesiology, Shree Siddheshwar Multispeciality Hospital, Dhule, IND
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Godoy DA, Brasil S, Iaccarino C, Paiva W, Rubiano AM. The intracranial compartmental syndrome: a proposed model for acute brain injury monitoring and management. Crit Care 2023; 27:137. [PMID: 37038236 PMCID: PMC10088257 DOI: 10.1186/s13054-023-04427-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Accepted: 04/02/2023] [Indexed: 04/12/2023] Open
Abstract
For decades, one of the main targets in the management of severe acute brain injury (ABI) has been intracranial hypertension (IH) control. However, the determination of IH has suffered variations in its thresholds over time without clear evidence for it. Meanwhile, progress in the understanding of intracranial content (brain, blood and cerebrospinal fluid) dynamics and recent development in monitoring techniques suggest that targeting intracranial compliance (ICC) could be a more reliable approach rather than guiding actions by predetermined intracranial pressure values. It is known that ICC impairment forecasts IH, as intracranial volume may rapidly increase inside the skull, a closed bony box with derisory expansibility. Therefore, an intracranial compartmental syndrome (ICCS) can occur with deleterious brain effects, precipitating a reduction in brain perfusion, thereby inducing brain ischemia. The present perspective review aims to discuss the ICCS concept and suggest an integrative model for the combination of modern invasive and noninvasive techniques for IH and ICC assessment. The theory and logic suggest that the combination of multiple ancillary methods may enhance ICC impairment prediction, pointing proactive actions and improving patient outcomes.
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Affiliation(s)
| | - Sérgio Brasil
- Experimental Surgery Laboratory and Division of Neurological Surgery, University of São Paulo Medical School, Av. Eneas de Carvalho Aguiar 255, Sao Paulo, Brazil.
| | - Corrado Iaccarino
- Department of Biomedical, Metabolic and Neural Sciences, University Modena and Reggio Emilia, Modena, Italy
- Department of Neurosurgery, University Hospital of Modena, Modena, Italy
- Emergency Neurosurgery, AUSLRE IRCCS, Reggio Emilia, Italy
| | - Wellingson Paiva
- Experimental Surgery Laboratory and Division of Neurological Surgery, University of São Paulo Medical School, Av. Eneas de Carvalho Aguiar 255, Sao Paulo, Brazil
| | - Andres M Rubiano
- Universidad El Bosque. Bogotá, Bogotá, Colombia
- MEDITECH Foundation, Cali, Colombia
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Ju LS, Zhu J, Brant JO, Morey TE, Gravenstein N, Seubert CN, Vasilopoulos T, Setlow B, Martynyuk AE. Intergenerational Perioperative Neurocognitive Disorder in Young Adult Male Rats with Traumatic Brain Injury. Anesthesiology 2023; 138:388-402. [PMID: 36637480 PMCID: PMC10411496 DOI: 10.1097/aln.0000000000004496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
BACKGROUND The authors tested the hypothesis that the effects of traumatic brain injury, surgery, and sevoflurane interact to induce neurobehavioral abnormalities in adult male rats and in their offspring (an animal model of intergenerational perioperative neurocognitive disorder). METHODS Sprague-Dawley male rats (assigned generation F0) underwent a traumatic brain injury on postnatal day 60 that involved craniectomy (surgery) under 3% sevoflurane for 40 min followed by 2.1% sevoflurane for 3 h on postnatal days 62, 64, and 66 (injury group). The surgery group had craniectomy without traumatic brain injury, whereas the sevoflurane group had sevoflurane only. On postnatal day 90, F0 males and control females were mated to generate offspring (assigned generation F1). RESULTS Acutely, F0 injury rats exhibited the greatest increases in serum corticosterone and interleukin-1β and -6, and activation of the hippocampal microglia. Long-term, compared to controls, F0 injury rats had the most exacerbated corticosterone levels at rest (mean ± SD, 2.21 ± 0.64 vs. 7.28 ± 1.95 ng/ml, n = 7 - 8; P < 0.001) and 10 min after restraint (133.12 ± 33.98 vs. 232.83 ± 40.71 ng/ml, n = 7 - 8; P < 0.001), increased interleukin-1β and -6, and reduced expression of hippocampal glucocorticoid receptor (Nr3c1; 0.53 ± 0.08 fold change relative to control, P < 0.001, n = 6) and brain-derived neurotrophic factor genes. They also exhibited greater behavioral deficiencies. Similar abnormalities were evident in their male offspring, whereas F1 females were not affected. The reduced Nr3c1 expression in F1 male, but not female, hippocampus was accompanied by corresponding Nr3c1 promoter hypermethylated CpG sites in F0 spermatozoa and F1 male, but not female, hippocampus. CONCLUSIONS These findings in rats suggest that young adult males with traumatic brain injury are at an increased risk of developing perioperative neurocognitive disorder, as are their unexposed male but not female offspring. EDITOR’S PERSPECTIVE
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Affiliation(s)
- Ling-Sha Ju
- Department of Anesthesiology, University of Florida, College of Medicine, Gainesville, Florida
| | - Jiepei Zhu
- Department of Anesthesiology, University of Florida, College of Medicine, Gainesville, Florida
| | - Jason O Brant
- Department of Biostatistics, University of Florida, College of Medicine, Gainesville, Florida
| | - Timothy E Morey
- Department of Anesthesiology, University of Florida, College of Medicine, Gainesville, Florida
| | - Nikolaus Gravenstein
- Department of Anesthesiology, University of Florida, College of Medicine, Gainesville, Florida
| | - Christoph N Seubert
- Department of Anesthesiology, University of Florida, College of Medicine, Gainesville, Florida
| | - Terrie Vasilopoulos
- Departments of Anesthesiology, Orthopedic Surgery and Sports Medicine, University of Florida, College of Medicine, Gainesville, Florida
| | - Barry Setlow
- Department of Psychiatry and the McKnight Brain Institute, University of Florida, College of Medicine, Gainesville, Florida
| | - Anatoly E Martynyuk
- Department of Anesthesiology and the McKnight Brain Institute, University of Florida, College of Medicine, Gainesville, Florida
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Sharma S, Nunes M, Alkhachroum A. Adult Critical Care Electroencephalography Monitoring for Seizures: A Narrative Review. Front Neurol 2022; 13:951286. [PMID: 35911927 PMCID: PMC9334872 DOI: 10.3389/fneur.2022.951286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 06/22/2022] [Indexed: 11/13/2022] Open
Abstract
Electroencephalography (EEG) is an important and relatively inexpensive tool that allows intensivists to monitor cerebral activity of critically ill patients in real time. Seizure detection in patients with and without acute brain injury is the primary reason to obtain an EEG in the Intensive Care Unit (ICU). In response to the increased demand of EEG, advances in quantitative EEG (qEEG) created an approach to review large amounts of data instantly. Finally, rapid response EEG is now available to reduce the time to detect electrographic seizures in limited-resource settings. This review article provides a concise overview of the technical aspects of EEG monitoring for seizures, clinical indications for EEG, the various available modalities of EEG, common and challenging EEG patterns, and barriers to EEG monitoring in the ICU.
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Affiliation(s)
- Sonali Sharma
- Department of Neurology, University of Miami, Miami, FL, United States
- Department of Neurology, Jackson Memorial Hospital, Miami, FL, United States
| | - Michelle Nunes
- Department of Neurology, University of Miami, Miami, FL, United States
- Department of Neurology, Jackson Memorial Hospital, Miami, FL, United States
| | - Ayham Alkhachroum
- Department of Neurology, University of Miami, Miami, FL, United States
- Department of Neurology, Jackson Memorial Hospital, Miami, FL, United States
- *Correspondence: Ayham Alkhachroum
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Cai S, Lu Z. Effect of Mild Hypothermia after Craniotomy on the Function of Related Organs in Patients with Traumatic Brain Injury. Emerg Med Int 2021; 2021:4105406. [PMID: 34659832 PMCID: PMC8519674 DOI: 10.1155/2021/4105406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 09/17/2021] [Indexed: 11/30/2022] Open
Abstract
OBJECTIVE To investigate the effect of mild hypothermia after craniotomy on the function of related organs in patients with traumatic brain injury. METHOD A total of 240 patients with craniocerebral injury from January 2017 to December 2020 were retrospectively analyzed. Patients were randomly divided into a control group and an experimental group, with 120 cases in each group. The control group was treated with craniotomy decompression, and the experimental group was treated with early mild hypothermia based on craniotomy decompression. Patients' venous blood was collected before operation (T 0), at the end of operation (T 1), 24 h after operation (T 2), and 2 weeks after operation (T 3) to detect the serum levels of the beta-subunit of S100 protein (S100-β); soluble growth stimulation expressed gene 2 (sST2), neutrophil gelatinase-associated lipocalin (NGAL), and interleukin 6 (IL-6). The prognostic effect was evaluated after 2 weeks of treatment. RESULTS After mild hypothermia treatment after craniotomy and decompression, the patients' serum S100-β, sST2, NGAL, and IL-6 levels at different time points were significantly lower than the control group, and the total effective rate was higher than that of the control group. CONCLUSION The treatment of mild hypothermia after craniotomy can reduce the related organs function damage indicators and inflammatory stress response, thus improving clinical efficacy and prognosis.
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Affiliation(s)
- Shu Cai
- Department of Neurosurgery, Affiliated Haian Hospital of Nantong University, Haian 226600, Nantong, Jiangsu, China
| | - Zheng Lu
- Department of Neurosurgery, Affiliated Haian Hospital of Nantong University, Haian 226600, Nantong, Jiangsu, China
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Kajiwara S, Hasegawa Y, Negoto T, Orito K, Kawano T, Yoshitomi M, Sakata K, Takeshige N, Yamakawa Y, Jono H, Saito H, Hirayu N, Takasu O, Hirohata M, Morioka M. Efficacy of a Novel Prophylactic Barbiturate Therapy for Severe Traumatic Brain Injuries: Step-down Infusion of a Barbiturate with Normothermia. Neurol Med Chir (Tokyo) 2021; 61:528-535. [PMID: 34078830 PMCID: PMC8443969 DOI: 10.2176/nmc.oa.2021-0097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
This study aimed to examine the beneficial effects of a novel prophylactic barbiturate therapy, step-down infusion of barbiturates, using thiamylal with normothermia (NOR+sdB), on the poor outcome in the patients with severe traumatic brain injuries (sTBI), in comparison with mild hypothermia (MD-HYPO). From January 2000 to March 2019, 4133 patients with TBI were admitted to our hospital. The inclusion criteria were: a Glasgow coma scale (GCS) score of ≤8 on admission, age between 20 and 80 years, intracranial hematoma requiring surgical evacuation of the hematoma with craniotomy and/or external decompression, and patients who underwent management of body temperature and assessed their outcome at 6-12 months. Finally, 43 patients were included in the MD-HYPO (n = 29) and NOR+sdB (n = 14) groups. sdB was initiated intraoperatively or immediately after the surgical treatment. There were no significant differences in patient characteristics, including age, sex, past medical history, GCS on admission, type of intracranial hematoma, and length of hospitalization between the two groups. Although NOR+sdB could not improve the patient's poor outcome either at discharge from the intensive care unit (ICU) or at 6-12 months after admission, the treatment inhibited composite death at discharge from the ICU. The mean value of the maximum intracranial pressure (ICP) in the NOR+sdB group was <20 mmHg throughout the first 120 h. NOR+sdB prevented composite death in the ICU in patients with sTBI, and we may obtain novel insights into the beneficial role of prophylactic barbiturate therapy from suppression of the elevated ICP during the first 120 h.
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Affiliation(s)
- Sosho Kajiwara
- Department of Neurosurgery, Kurume University School of Medicine
| | - Yu Hasegawa
- Department of Neurosurgery, Kurume University School of Medicine.,Department of Pharmaceutical Sciences, International University of Health and Welfare
| | - Tetsuya Negoto
- Department of Neurosurgery, Kurume University School of Medicine
| | - Kimihiko Orito
- Department of Neurosurgery, Kurume University School of Medicine
| | - Takayuki Kawano
- Department of Neurosurgery, Kurume University School of Medicine
| | | | - Kiyohiko Sakata
- Department of Neurosurgery, Kurume University School of Medicine
| | | | | | - Hirofumi Jono
- Department of Pharmacy, Kumamoto University Hospital
| | | | - Nobuhisa Hirayu
- Department of Emergency and Critical Care Medicine, Kurume University School of Medicine
| | - Osamu Takasu
- Department of Emergency and Critical Care Medicine, Kurume University School of Medicine
| | - Masaru Hirohata
- Department of Neurosurgery, Kurume University School of Medicine
| | - Motohiro Morioka
- Department of Neurosurgery, Kurume University School of Medicine
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