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Shear vs pressure as causative factors in skin blood flow occlusion.

Authors
Type
Published Article
Journal
Archives of Physical Medicine and Rehabilitation
0003-9993
Publisher
Elsevier
Publication Date
Volume
60
Issue
7
Pages
309–314
Identifiers
PMID: 454129
Source
Medline
License
Unknown

Abstract

An instrument was developed to measure the external pressure, shear, and pulsatile arteriolar blood flow existent at a given portion of the anatomy. Application of this device to the thenar eminence of 4 healthy subjects showed that externally applied pressure was approximately twice as effective as shear in reducing pulsatile arteriolar blood flow. The combination of pressure plus shear was found particularly effective in promoting blood flow occlusion. At a sufficiently high level of shear (roughly 100 g/cm2) the pressure necessary to produce occlusion was half that required when little shear was present.

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