Document Detail

Entrapment of sized emboli by the KMA-Greenfield intracaval filter.
MedLine Citation:
PMID:  635779     Owner:  NLM     Status:  MEDLINE    
Clinical studies demonstrating the effectiveness of the Kim-Ray Greenfield vena caval filter in the management of pulmonary emboli have stimulated efforts to accurately define this filter's capability to entrap sized emboli and maintain caval patency. Twenty-three dogs had filters inserted and positioned distal to the renal veins. Radiopaque emboli measuring 2 to 5 mm were introduced via the femoral vein. Cineradiography allowed direct observation of emboli capture and filter flow dynamics. Probability of entrapment was found to be related to (1) emboli size, (2) depth of filling of the conical-shaped filter by prior entrapment of emboli, and (3) absence of distal venous hypertension. The geometric design of the filter, which allows progressive vertical filling while maintaining circumferential blood flow, is thought to be responsible for entrapment of emboli and avoidance of venous thrombosis and hypertension.
T M Schroeder; R C Elkins; L J Greenfield
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Surgery     Volume:  83     ISSN:  0039-6060     ISO Abbreviation:  Surgery     Publication Date:  1978 Apr 
Date Detail:
Created Date:  1978-05-08     Completed Date:  1978-05-08     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  0417347     Medline TA:  Surgery     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  435-9     Citation Subset:  AIM; IM    
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MeSH Terms
Disease Models, Animal
Filtration / instrumentation*
Particle Size
Pulmonary Embolism / pathology,  therapy*
Vena Cava, Inferior*
Venous Pressure

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

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