The Experts below are selected from a list of 234 Experts worldwide ranked by ideXlab platform
Jan Goffin - One of the best experts on this subject based on the ideXlab platform.
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biomechanical properties of the superior sagittal sinus bridging Vein complex
Stapp car crash journal, 2006Co-Authors: Hans Delye, Georges Van Der Perre, Jan Goffin, Peter Verschueren, Jos Vander Sloten, Herwig Alaerts, Ignaas Verpoest, Daniel BerckmansAbstract:Finite element models (FEM) of the head are frequently used to simulate traumatic brain injury, leading to a better understanding of brain injury tolerance. The strength of a FEM of the head is dependent on the use of correct material characteristics, experimentally derived for each intracranial tissue, including parasagittal bridging Veins (BV). These Veins are prone to Rupture in their subdural portion upon head impact, giving rise to an acute subdural hematoma (ASDH). The junction of these Veins to the superior sagittal sinus (SSS) has been described as an area with distinct Vein wall architecture. To understand the biomechanical characteristics of acute subdural hematoma, we studied the SSS-BV complex by loading it to failure in a tensile test. 37 BVs from 9 fresh cadavers were dissected, leaving small strips of SSS attached to the Veins. The units were clamped on the SSS and the cortical end of the BV. Strain rates ranged from 0.1-3.8 s(-1). From force-time and strain-time histories, we calculated ultimate strain (epsilon(U)), ultimate stress (sigma(U)), yield strain (epsilon(Y)), yield stress(sigma(Y)) and Young's modulus (E). A mixed-model multivariate analysis of variance (MANOVA) was used to study correlations and strain rate sensitivity of these parameters. We found no strain rate sensitivity. The biomechanical response of the SSS-BV unit in this study was found to be stiffer than reported biomechanical behavior of bridging Veins. We conclude that the SSS-BV junction plays an important role in bridging Vein Rupture, and warrants further investigation to provide FEM with correct material properties for bridging Veins.
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mechanics of acute subdural hematomas resulting from bridging Vein Rupture
Journal of Neurosurgery, 2006Co-Authors: Bart Depreitere, Carl Van Lierde, Jozef Vander Sloten, Remy Van Audekercke, Georges Van Der Perre, Christiaan Plets, Jan GoffinAbstract:Object Based on data from primate experiments it is known that rotational acceleration in the sagittal plane and in a forward direction is most likely to produce acute subdural hematomas due to bridging Vein Rupture. For protection against these lesions, knowledge of rotational acceleration tolerance levels in humans is required. In the present study the authors analyze human tolerance levels for bridging Vein Rupture by performing head impact tests in cadavers. Methods Ten unembalmed cadavers were subjected to 18 occipital impacts producing head rotation in the sagittal plane with varying rotational acceleration magnitudes and pulse durations. Rotational acceleration was calculated from the linear acceleration histories recorded by three uniaxial accelerometers mounted on the side of the head. Bridging Vein Ruptures were detected by injecting contrast dye into the superior sagittal sinus under fluoroscopy and by autopsy procedures. Bridging Vein Ruptures were produced in six head impact tests: one test w...
Yoncheong Wong - One of the best experts on this subject based on the ideXlab platform.
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spontaneous Rupture of left external iliac Vein case report and review of the literature
Journal of Vascular Surgery, 1996Co-Authors: R J Chen, Jenfeng Fang, Yoncheong WongAbstract:Abstract Iliac Vein Rupture is rare and primarily results from major trauma or occurs during pelvic surgery. Spontaneous nontraumatic Rupture is even more unusual, with only 14 cases reported in the literature. We report an additional case, summarize all of the cases, and discuss the possible causes and treatment of iliac Vein Rupture and the role of anticoagulants in postoperative management. (J Vasc Surg 1996;24:284-7.)
Elisabeth Cornu - One of the best experts on this subject based on the ideXlab platform.
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blunt chest trauma a right pulmonary Vein Rupture
European Journal of Cardio-Thoracic Surgery, 2001Co-Authors: Le A Guyader, F Bertin, Marc Laskar, Elisabeth CornuAbstract:This report describes the case of a 37-year-old man who fell from 6 m height and presented an isolated Rupture of the right pulmonary Vein. The patient had a low blood pressure without any sign of intrathoracic injury. An echocardiogram revealed a tamponade with hemodynamic intolerance. The repair was made using cardiopulmonary bypass which made the inspection and total repair of the lesions easier. This case is unusual because of the isolated lesion and the few articles about similar reports founded in an extended literature review. Mechanisms and generation of blunt chest trauma lesions are discussed.
William J Sharp - One of the best experts on this subject based on the ideXlab platform.
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may thurner syndrome presenting as spontaneous left iliac Vein Rupture
Journal of vascular surgery. Venous and lymphatic disorders, 2016Co-Authors: Maen Aboul Hosn, Neelima Katragunta, Timothy F Kresowik, William J SharpAbstract:Spontaneous iliac Vein Rupture resulting in a retroperitoneal hematoma is extremely rare and can present as a life-threatening emergency. There is often a delay in diagnosis with no established treatment recommendations. We report the case of a 39-year-old woman who presented with hypovolemic shock, a large left retroperitoneal hematoma, and left lower extremity phlegmasia in the setting of a previously asymptomatic May-Thurner syndrome. She was successfully treated with a combined open and endovascular approach. We also reviewed the literature on the evolution of diagnosis and treatment of this rare condition and present our recommendations for management.
Bart Depreitere - One of the best experts on this subject based on the ideXlab platform.
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on the assessment of bridging Vein Rupture associated acute subdural hematoma through finite element analysis
Computer Methods in Biomechanics and Biomedical Engineering, 2017Co-Authors: Zhao Ying Cui, Bart Depreitere, Nele Famaey, Svein Kleiven, Jan Ivens, Jozef Vander SlotenAbstract:Acute subdural hematoma (ASDH) is a type of intracranial haemorrhage following head impact, with high mortality rates. Bridging Vein (BV) Rupture is a major cause of ASDH, which is why a biofidelic ...
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finite element simulation of bridging Vein Rupture
World Congress on Computational Mechanics (WCCM XI) Date: 2014 07 20 - 2014 07 25 Location: Barcelona, 2014Co-Authors: Zhao Ying Cui, Bart Depreitere, Jozef Vander Sloten, Nele Famaey, Svein KleivenAbstract:Uniaxial tensile tests on BVs have provided information on the strain at which these Veins fail [Lee 1989, Baeck 2013]. To find how these uniaxial failure values relate to actual reallife loading situations, head rotational tolerance criteria have been defined. On the one hand, these criteria can be defined based on cadaveric head tests [Depreitere2006]. On the other hand, finite element (FE) simulations can be performed. The goal of this study is to compare the rotational tolerance curve that was found based on cadaver testing by Depreitere et al., with FE simulations.
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mechanics of acute subdural hematomas resulting from bridging Vein Rupture
Journal of Neurosurgery, 2006Co-Authors: Bart Depreitere, Carl Van Lierde, Jozef Vander Sloten, Remy Van Audekercke, Georges Van Der Perre, Christiaan Plets, Jan GoffinAbstract:Object Based on data from primate experiments it is known that rotational acceleration in the sagittal plane and in a forward direction is most likely to produce acute subdural hematomas due to bridging Vein Rupture. For protection against these lesions, knowledge of rotational acceleration tolerance levels in humans is required. In the present study the authors analyze human tolerance levels for bridging Vein Rupture by performing head impact tests in cadavers. Methods Ten unembalmed cadavers were subjected to 18 occipital impacts producing head rotation in the sagittal plane with varying rotational acceleration magnitudes and pulse durations. Rotational acceleration was calculated from the linear acceleration histories recorded by three uniaxial accelerometers mounted on the side of the head. Bridging Vein Ruptures were detected by injecting contrast dye into the superior sagittal sinus under fluoroscopy and by autopsy procedures. Bridging Vein Ruptures were produced in six head impact tests: one test w...
