Document Detail


Mechanics of arterial subfailure with increasing loading rate.
MedLine Citation:
PMID:  17034799     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Arterial subfailure leads to delayed symptomatology and high morbidity and mortality rates, particularly for the thoracic aorta and carotid arteries. Although arterial injuries occur during high-velocity automotive collisions, previous studies of arterial subfailure focused on quasi-static loading. This investigation subjected aortic segments to increasing loading rates to quantify effects on elastic, subfailure, and ultimate vessel mechanics. Sixty-two specimens were axially distracted, and 92% demonstrated subfailure before ultimate failure. With increasing loading rate, stress at initial subfailure and ultimate failure significantly increased, and strain at initial subfailure and ultimate failure significantly decreased. Present results indicate increased susceptibility for arterial subfailure and/or dissection under higher-rate extension. According to the present results, automotive occupants are at greater risk of arterial injury under higher velocity impacts due to greater body segment motions in addition to decreased strain tolerance to subfailure and catastrophic failure.
Authors:
Brian D Stemper; Narayan Yoganandan; Frank A Pintar
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Publication Detail:
Type:  In Vitro; Journal Article; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2006-10-10
Journal Detail:
Title:  Journal of biomechanics     Volume:  40     ISSN:  0021-9290     ISO Abbreviation:  J Biomech     Publication Date:  2007  
Date Detail:
Created Date:  2007-05-14     Completed Date:  2007-08-01     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0157375     Medline TA:  J Biomech     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1806-12     Citation Subset:  IM    
Affiliation:
Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, WI 53226, USA. stemps@mcw.edu
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MeSH Terms
Descriptor/Qualifier:
Animals
Biomechanics / methods
Computer Simulation
Elasticity
Models, Cardiovascular*
Physical Stimulation / adverse effects
Stress, Mechanical
Swine
Thoracic Arteries / injuries*,  physiopathology*
Thoracic Injuries / etiology*,  physiopathology*
Viscosity
Wounds, Nonpenetrating / etiology*,  physiopathology*

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


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