Document Detail


Exercise strain-gauge venous plethysmography: evaluation of a "new" device for assessing lower limb venous incompetence.
MedLine Citation:
PMID:  1533497     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Plethysmography can be used to detect and assess venous incompetence in the lower extremities. The authors recently evaluated a new device designed for this purpose that uses strain gauges to determine changes in lower extremity circumference occurring with (and immediately after) exercise. The device plots a curve of volume against time for each limb and automatically calculates key values such as the volume of blood expelled from the lower limb veins during exercise and the time required for the veins to refill following exercise. The apparatus was incorporated into their noninvasive vascular laboratory and used (along with other standard tests) to study patients referred for suspected venous incompetence. They observed the following: (1) A shortened postexercise refilling time accurately identified limbs with venous incompetence. (2) The clinical severity of venous incompetence was inversely related to the refilling time. (3) Exercise-induced changes in lower extremity volume correlated well with simultaneously determined changes in venous pressure. (4) Valvular incompetence could be localized to the deep or superficial veins based upon the improvement in refilling times seen following placement of elastic tourniquets around the lower limb. (5) The type of exercise performed (knee bends while the patient was standing versus ankle reflexes while sitting) had little effect on results. The authors conclude that exercise venous plethysmography is a useful noninvasive tool for assessing lower limb venous incompetence.
Authors:
T W Rooke; J L Heser; P J Osmundson
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Angiology     Volume:  43     ISSN:  0003-3197     ISO Abbreviation:  Angiology     Publication Date:  1992 Mar 
Date Detail:
Created Date:  1992-06-03     Completed Date:  1992-06-03     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  0203706     Medline TA:  Angiology     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  219-28     Citation Subset:  IM    
Affiliation:
Department of Cardiovascular Diseases and Internal Medicine, Mayo Clinic, Rochester, Minnesota.
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MeSH Terms
Descriptor/Qualifier:
Blood Volume
Evaluation Studies as Topic
Exercise Test / instrumentation*,  methods
Humans
Leg / blood supply*
Plethysmography / instrumentation*,  methods
Plethysmography, Impedance
Rheology
Venous Insufficiency / diagnosis*,  physiopathology
Venous Pressure

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


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