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Xue C, Chen Y, Zhu B, Wang X. A comparative study of structural parameters for spiral groove bearing in centrifugal rotary blood pump. Heliyon 2023; 9:e14313. [PMID: 36942254 PMCID: PMC10023960 DOI: 10.1016/j.heliyon.2023.e14313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 02/26/2023] [Accepted: 02/28/2023] [Indexed: 03/08/2023] Open
Abstract
In this work, the hydrodynamic characteristics of spiral groove bearing in centrifugal rotary blood pump is investigated for the cases with different structural parameters. The simulation model is proposed based on the CFD technology and the effectiveness of simulation model is demonstrated by the published data. Then, the pressure, load carrying capacity and friction torque are calculated and the characteristics of pressure distribution are analyzed. It is found that the structural parameters of spiral groove would lead to the complex pressure distribution of blood film and the load carrying capacity also changes at the same time. Moreover, the deep analysis of structural characteristics for spiral groove bearing is conducted based on the orthogonal design method, which could improve the computational efficiency of hydrodynamic behavior of spiral groove bearing. And, the mapping relationship between structural parameter and hydrodynamic performance of bearing preferably is also illustrated.
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Affiliation(s)
- Cong Xue
- Department of Cardiology, The Third Affiliated Hospital of Soochow University, Changzhou 213003, China
- Corresponding author.
| | - Yu Chen
- School of Mechanical Engineering, Jiangsu University of Technology, Changzhou 213001, China
| | - Bin Zhu
- Department of Critical Care Medicine, The Third Affiliated Hospital of Soochow University, Changzhou 213003, China
| | - Xiuying Wang
- School of Mechanical Engineering, Jiangsu University of Technology, Changzhou 213001, China
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2
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Schiller D, Aufreiter L, Schöfl R. [Fever of unusual cause]. Rev Med Interne 2023; 44:146-147. [PMID: 36535845 DOI: 10.1016/j.revmed.2022.11.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 11/11/2022] [Accepted: 11/30/2022] [Indexed: 12/23/2022]
Affiliation(s)
- D Schiller
- Service de médecine interne IV, Ordensklinikum Linz Barmherzige Schwestern, 4, Seilerstätte, 4010 Linz, Autriche.
| | - L Aufreiter
- Service de médecine interne IV, Ordensklinikum Linz Barmherzige Schwestern, 4, Seilerstätte, 4010 Linz, Autriche
| | - R Schöfl
- Service de médecine interne IV, Ordensklinikum Linz Barmherzige Schwestern, 4, Seilerstätte, 4010 Linz, Autriche
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Pritt BS, Fernholz EC, Replogle AJ, Kingry LC, Sciotto MP, Petersen JM. Borrelia mayonii - A cause of Lyme borreliosis that can be visualized by microscopy of thin blood films. Clin Microbiol Infect 2021; 28:823-824. [PMID: 34325064 DOI: 10.1016/j.cmi.2021.07.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 06/29/2021] [Accepted: 07/18/2021] [Indexed: 11/26/2022]
Affiliation(s)
- Bobbi S Pritt
- Mayo Clinic, Division of Clinical Microbiology, Rochester, MN, USA.
| | - Emily C Fernholz
- Mayo Clinic, Division of Clinical Microbiology, Rochester, MN, USA
| | - Adam J Replogle
- Division of Vector Borne Diseases, US Centers for Disease Control and Prevention, Fort Collins, CO, USA
| | - Luke C Kingry
- Division of Vector Borne Diseases, US Centers for Disease Control and Prevention, Fort Collins, CO, USA
| | - Michael P Sciotto
- Mayo Clinic - Barron, Department of Emergency Medicine, Barron, WI, USA
| | - Jeannine M Petersen
- Division of Vector Borne Diseases, US Centers for Disease Control and Prevention, Fort Collins, CO, USA
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Beckman AK, Ng VL, Jaye DL, Gaddh M, Williams SA, Yohe SL, Zhang L, Linden MA. Clinician-ordered peripheral blood smears have low reimbursement and variable clinical value: a three-institution study, with suggestions for operational efficiency. Diagn Pathol 2020; 15:112. [PMID: 32943102 PMCID: PMC7500005 DOI: 10.1186/s13000-020-01033-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 09/09/2020] [Indexed: 11/28/2022] Open
Abstract
Background Peripheral blood smears are performed to evaluate a variety of hematologic and non-hematologic disorders. At the authors’ institutions, clinician requests for pathologist-performed blood smear reviews have increased in recent years. Blood smears may contribute significantly to pathologists’ workloads, yet their clinical value is variable, and professional reimbursement rates are low. This study aimed to identify clinical scenarios in which smear review is likely to provide value beyond automated laboratory testing. Methods Blood smear review practices at three institutions were examined, and the indications for and interpretations of clinician-initiated smears were reviewed to determine the percentage of smears with potential added clinical value. A smear review was classified as having added clinical value if the pathologist’s interpretation included a morphologic abnormality that had the potential to impact patient management, and that could not be diagnosed by automated complete blood count with white blood cell differential or automated iron studies alone. Results Among 515 consecutive clinician-requested smears performed during the study timeframes, 23% yielded interpretations with potential added clinical value. When sorted by indication, 25, 19, and 13% of smear reviews requested for white blood cell abnormalities, red blood cell abnormalities, and platelet abnormalities, respectively, had findings with potential added clinical value. The proportion of smears with potential clinical value differed significantly across these three categories (p = 0.0375). Conclusions Smear review ordering practices across three institutions resulted in a minority of smears with potential added clinical value. The likelihood of value varied according to the indication for which the smear was requested. Given this, efforts to improve the utilization and efficiency of smear review are worthwhile. Solutions are discussed, including engaging laboratory staff, educating clinicians, and modifying technology systems.
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Affiliation(s)
- Amy K Beckman
- Department of Laboratory Medicine and Pathology, University of Minnesota Medical School, Mayo Memorial Building, 420 Delaware Street SE, Minneapolis, MN, 55455, USA.
| | - Valerie L Ng
- Department of Laboratory Medicine & Pathology, Alameda Health System, Oakland, California, USA
| | - David L Jaye
- Department of Laboratory Medicine & Pathology, Emory University Hospital, Atlanta, Georgia, USA
| | - Manila Gaddh
- Department of Hematology and Medical Oncology, Emory University Hospital, Atlanta, Georgia, USA
| | - Sarah A Williams
- Department of Laboratory Medicine and Pathology, University of Minnesota Medical School, Mayo Memorial Building, 420 Delaware Street SE, Minneapolis, MN, 55455, USA
| | - Sophia L Yohe
- Department of Laboratory Medicine and Pathology, University of Minnesota Medical School, Mayo Memorial Building, 420 Delaware Street SE, Minneapolis, MN, 55455, USA
| | - Lin Zhang
- Division of Biostatistics, University of Minnesota School of Public Health, Minneapolis, MN, USA
| | - Michael A Linden
- Department of Laboratory Medicine and Pathology, University of Minnesota Medical School, Mayo Memorial Building, 420 Delaware Street SE, Minneapolis, MN, 55455, USA
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Vinkeles Melchers NVS, Coffeng LE, de Vlas SJ, Stolk WA. Standardisation of lymphatic filariasis microfilaraemia prevalence estimates based on different diagnostic methods: a systematic review and meta-analysis. Parasit Vectors 2020; 13:302. [PMID: 32527335 PMCID: PMC7288683 DOI: 10.1186/s13071-020-04144-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Accepted: 05/21/2020] [Indexed: 11/15/2022] Open
Abstract
Background Lymphatic filariasis (LF) infection is generally diagnosed through parasitological identification of microfilariae (mf) in the blood. Although historically the most commonly used technique for counting mf is the thick blood smear based on 20 µl blood (TBS20), various other techniques and blood volumes have been applied. It is therefore a challenge to compare mf prevalence estimates from different LF-survey data. Our objective was to standardise microfilaraemia (mf) prevalence estimates to TBS20 as the reference diagnostic technique. Methods We first performed a systematic review to identify studies reporting on comparative mf prevalence data as measured by more than one diagnostic test, including TBS20, on the same study population. Associations between mf prevalences based on different diagnostic techniques were quantified in terms of odds ratios (OR, with TBS20 blood as reference), using a meta-regression model. Results We identified 606 articles matching our search strategy and included 14 in our analyses. The OR of the mf prevalences as measured by the more sensitive counting chamber technique (≥ 50 µl blood) was 2.90 (95% confidence interval (CI): 1.60–5.28). For membrane filtration (1 ml blood) the OR was 2.39 (95% CI: 1.62–3.53), Knott’s technique it was 1.54 (95% CI: 0.72–3.29), and for TBS in ≥ 40 µl blood it was 1.37 (95% CI: 0.81–2.30). Conclusions We provided transformation factors to standardise mf prevalence estimates as detected by different diagnostic techniques to mf prevalence estimates as measured by TBS20. This will facilitate the use and comparison of more datasets in meta-analyses and geographic mapping initiatives across countries and over time.![]()
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Affiliation(s)
- Natalie V S Vinkeles Melchers
- Department of Public Health, Erasmus MC, University Medical Center Rotterdam, P.O. Box 2040, 3000 CA, Rotterdam, The Netherlands.
| | - Luc E Coffeng
- Department of Public Health, Erasmus MC, University Medical Center Rotterdam, P.O. Box 2040, 3000 CA, Rotterdam, The Netherlands
| | - Sake J de Vlas
- Department of Public Health, Erasmus MC, University Medical Center Rotterdam, P.O. Box 2040, 3000 CA, Rotterdam, The Netherlands
| | - Wilma A Stolk
- Department of Public Health, Erasmus MC, University Medical Center Rotterdam, P.O. Box 2040, 3000 CA, Rotterdam, The Netherlands
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Tomkins M, Tudor RM, Smith D, Agha A. Propylthiouracil-induced antineutrophil cytoplasmic antibody-associated vasculitis and agranulocytosis in a patient with Graves' disease. Endocrinol Diabetes Metab Case Rep 2020; 2020:EDM190135. [PMID: 31917676 PMCID: PMC6993247 DOI: 10.1530/edm-19-0135] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Accepted: 12/11/2019] [Indexed: 11/26/2022] Open
Abstract
SUMMARY This case is the first to describe a patient who experienced concomitant agranulocytosis and anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitis as an adverse effect of propylthiouracil treatment for Graves' disease. A 42-year-old female with Graves' disease presented to the emergency department (ED) with a 2-week history of fevers, night sweats, transient lower limb rash, arthralgia, myalgia and fatigue. She had been taking propylthiouracil for 18 months prior to presentation. On admission, agranulocytosis was evident with a neutrophil count of 0.36 × 109/L and immediately propylthiouracil was stopped. There was no evidence of active infection and the patient was treated with broad-spectrum antibodies and one dose of granulocyte colony-stimulation factor, resulting in a satisfactory response. On further investigation, ANCAs were positive with dual positivity for proteinase 3 and myeloperoxidase. There was no evidence of end-organ damage secondary to vasculitis, and the patient's constitutional symptoms resolved completely on discontinuation of the drug precluding the need for immunosuppressive therapy. LEARNING POINTS Continued vigilance and patient education regarding the risk of antithyroid drug-induced agranulocytosis is vital throughout the course of treatment. ANCA-associated vasculitis is a rare adverse effect of antithyroid drug use. Timely discontinuation of the offending drug is vital in reducing end-organ damage and the need for immunosuppressive therapy in drug-induced ANCA-associated vasculitis. Similarities in the pathogenesis of agranulocytosis and drug-induced ANCA-associated vasculitis may offer insight into an improved understanding of vasculitis and agranulocytosis.
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Affiliation(s)
- Maria Tomkins
- Department of Endocrinology and Diabetes, Beaumont Hospital Dublin, Dublin, Ireland
| | - Roxana Maria Tudor
- Department of Endocrinology and Diabetes, Beaumont Hospital Dublin, Dublin, Ireland
| | - Diarmuid Smith
- Department of Endocrinology and Diabetes, Beaumont Hospital Dublin, Dublin, Ireland
| | - Amar Agha
- Department of Endocrinology and Diabetes, Beaumont Hospital Dublin, Dublin, Ireland
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Cox D, Henderson M, Straub V, Barresi R. A simple and rapid immunoassay predicts dysferlinopathies in peripheral blood film. Neuromuscul Disord 2019; 29:874-880. [PMID: 31668500 DOI: 10.1016/j.nmd.2019.09.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 09/09/2019] [Accepted: 09/11/2019] [Indexed: 11/29/2022]
Abstract
The assessment of dysferlin expression is useful to indicate or confirm the diagnosis of dysferlinopathies, a class of muscular diseases caused by mutations in the DYSF gene. Immunoblot analysis of skeletal muscle or monocytes is a specific and reliable diagnostic indicator of the disease, but the technique is specialized and laborious. We have developed a novel, robust immunoassay for detection of dysferlin in neutrophils requiring as little as one drop of blood. Our assay overcomes the issues of storage and handling of samples suggesting great promise as an inexpensive and rapid first screening for DYSF mutations. This relatively simple non-quantitative assay has the potential to benefit centers with limited resources, contributing to current diagnostic investigations into dysferlinopathies.
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Affiliation(s)
- Daniel Cox
- John Walton Muscular Dystrophy Research Centre, Institute of Genetic Medicine, Newcastle University and Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - Matthew Henderson
- Muscle Immunoanalysis Unit, Newcastle upon Tyne Hospitals NHS Foundation Trust, NHS England Highly Specialised Service for Rare Neuromuscular Disorders (LGMD), Dental Hospital, Richardson Road, Newcastle upon Tyne NE2 4AZ, UK
| | - Volker Straub
- John Walton Muscular Dystrophy Research Centre, Institute of Genetic Medicine, Newcastle University and Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - Rita Barresi
- John Walton Muscular Dystrophy Research Centre, Institute of Genetic Medicine, Newcastle University and Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK; Muscle Immunoanalysis Unit, Newcastle upon Tyne Hospitals NHS Foundation Trust, NHS England Highly Specialised Service for Rare Neuromuscular Disorders (LGMD), Dental Hospital, Richardson Road, Newcastle upon Tyne NE2 4AZ, UK.
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Hussain S, Keat S, Gelding SV. Ketosis-prone diabetes and SLE co-presenting in an African lady with previous gestational diabetes. Endocrinol Diabetes Metab Case Rep 2017; 2017:EDM170086. [PMID: 29026609 PMCID: PMC5633049 DOI: 10.1530/edm-17-0086] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Accepted: 09/13/2017] [Indexed: 12/02/2022] Open
Abstract
We describe the case of an African woman who was diagnosed with ketosis-prone diabetes with diabetes-associated autoantibodies, after being admitted for diabetic ketoacidosis (DKA) precipitated by her first presentation of systemic lupus erythematosus (SLE). She had a seven-year history of recurrent gestational diabetes (GDM) not requiring insulin therapy, with return to normoglycaemia after each pregnancy. This might have suggested that she had now developed type 2 diabetes (T2D). However, the diagnosis of SLE prompted testing for an autoimmune aetiology for the diabetes, and she was found to have a very high titre of GAD antibodies. Typical type 1 diabetes (T1D) was thought unlikely due to the long preceding history of GDM. Latent autoimmune diabetes of adults (LADA) was considered, but ruled out as she required insulin therapy from diagnosis. The challenge of identifying the type of diabetes when clinical features overlap the various diabetes categories is discussed. This is the first report of autoimmune ketosis-prone diabetes (KPD) presenting with new onset of SLE.
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Affiliation(s)
- S Hussain
- Department of Diabetes and Endocrinology, Newham University Hospital, Barts Health NHS Trust, London, UK
| | - S Keat
- Department of Diabetes and Endocrinology, Newham University Hospital, Barts Health NHS Trust, London, UK
| | - S V Gelding
- Department of Diabetes and Endocrinology, Newham University Hospital, Barts Health NHS Trust, London, UK
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