Document Detail

A nonlinear biomechanical model for evaluation of cerebrospinal fluid shunt systems.
MedLine Citation:
PMID:  7954499     Owner:  NLM     Status:  MEDLINE    
In view of complications arising from physical properties of cerebrospinal fluid shunts, a biomechanical model of hydrocephalus was set up to study in vivo parameters that may influence their function. These include: intracranial pressure, compliance and pulses, intrathoracic, intra-abdominal, and subcutaneous pressures, and the effects of siphonage and repeated valve flushing. Each of these factors was studied separately upon shunt implantation in the model. Results of testing of a sample low-pressure valve with antisiphon device conformed with consumer information in regard to valve opening pressure and pressure flow measurements. No customer information, however, was supplied concerning the deleterious effects of direct subcutaneous pressure, variable degrees of siphonage, and repeated valve flushing that were demonstrated by the model. Such results indicate that shunts should be similarly tested prior to marketing and implantation in patients.
M A Hafez; O Kempski
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery     Volume:  10     ISSN:  0256-7040     ISO Abbreviation:  Childs Nerv Syst     Publication Date:  1994 Jul 
Date Detail:
Created Date:  1994-12-20     Completed Date:  1994-12-20     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8503227     Medline TA:  Childs Nerv Syst     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  302-10; discussion 310-1     Citation Subset:  IM    
Department of Neurosurgery, Cairo University, Egypt.
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MeSH Terms
Cerebral Veins / physiopathology
Cerebrospinal Fluid Pressure / physiology
Cerebrospinal Fluid Shunts*
Cranial Sinuses / physiopathology
Equipment Design
Equipment Failure
Hydrocephalus / physiopathology*,  surgery
Intracranial Pressure / physiology*
Jugular Veins
Models, Neurological*
Transducers, Pressure

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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