Document Detail


Axial distortion of airways in the lung.
MedLine Citation:
PMID:  6826404     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Axial loads were applied around the circumference of an airway lumen by pulling on a cup-shaped anchor that embedded itself in the airway wall. Axial displacements were measured as a function of distance from the load, and the data were compared to the results of mathematical analyses of continuum mechanics models. In the modeling it was assumed that the elastic tube representing the airway is bonded to the surrounding elastic continuum representing the parenchyma and that axial forces are transmitted between the tube and the continuum by shear stresses at the interface. The agreement between the measured and computed axial displacements supports the hypothesis that the shear stresses are the dominant coupling mechanism. The following quantitative relations between force and displacement were obtained. The axial displacement produced by the load L was approximately 0.05 L/pi alpha mu, where alpha is the airway radius and mu is the shear modulus of the parenchyma. The displacement decayed to approximately one-half this maximal value at two diameters from the load.
Authors:
M J Kallok; S J Lai-Fook; M A Hajji; T A Wilson
Related Documents :
25322034 - A hybrid tool for spectral ray tracing simulations of luminescent cascade systems.
15348244 - Mechanical and structural characteristics of commercially pure grade 2 ti welds and sol...
25369904 - Fano resonance and dipolar relaxation in lead-free relaxors.
25170724 - Quantum resistor-capacitor circuit with majorana fermion modes in a chiral topological ...
22894204 - Sound transmission of cavity walls due to structure borne transmission via point and li...
17767374 - Electroconvection in nematics above the splay fréedericksz transition.
Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of applied physiology: respiratory, environmental and exercise physiology     Volume:  54     ISSN:  0161-7567     ISO Abbreviation:  J Appl Physiol Respir Environ Exerc Physiol     Publication Date:  1983 Jan 
Date Detail:
Created Date:  1983-04-15     Completed Date:  1983-04-15     Revised Date:  2013-09-26    
Medline Journal Info:
Nlm Unique ID:  7801242     Medline TA:  J Appl Physiol Respir Environ Exerc Physiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  185-90     Citation Subset:  IM    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Animals
Dogs
Lung / anatomy & histology*
Models, Anatomic
Stress, Mechanical*
Grant Support
ID/Acronym/Agency:
HL-21584/HL/NHLBI NIH HHS

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


Previous Document:  Blood lactate threshold in some well-trained ischemic heart disease patients.
Next Document:  Simultaneous comparison of tracheobronchial and right duct lymph dynamics in dogs.