Document Detail


A Review of Recent Findings About Stress-Relaxation in the Respiratory System Tissues.
MedLine Citation:
PMID:  25097096     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
This article reviews the state of the art about an unclear physiological phenomenon interesting respiratory system tissues, i.e., stress-relaxation. Due to their visco-elastic properties, the tissues do not maintain constant stress under constant deformation. Rather, the stress slowly relaxes and falls to a lower value. The exact molecular basis of this complex visco-elastic behavior is not well defined, but it has been suggested that it may be generated because of the anisotropic mechanical properties of elastin and collagen fibers in the alveolar septa and their interaction phenomena, such as reciprocal sliding, also in relation to interstitial liquid movements. The effects on stress-relaxation of various biochemical and physical factors are reviewed, including the consequences of body temperature variations, respiratory system inflammations and hyperbaric oxygen exposure, endocrinal factors, circulating blood volume variations, changes in inflation volume and/or flow, changes in intra-abdominal pressure because of pneumoperitoneum or Trendelenburg position. The effects of these factors on stress-relaxation have practical consequences because, depending on visco-elastic pressure amount which is requested to inflate the respiratory system in different conditions, respiratory muscles have to produce different values of inspiratory pressure during spontaneous breathing. High inspiratory pressure values might increase the risk of respiratory failure development on mechanical basis.
Authors:
Alessandro Rubini; Emanuele Luigi Carniel
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-8-6
Journal Detail:
Title:  Lung     Volume:  -     ISSN:  1432-1750     ISO Abbreviation:  Lung     Publication Date:  2014 Aug 
Date Detail:
Created Date:  2014-8-6     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7701875     Medline TA:  Lung     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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