Document Detail


A standardized system for describing flow/pressure relationships in vascular access devices.
MedLine Citation:
PMID:  2012719     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Catheters are usually characterized by length and external diameter only. We developed a system to describe flow-pressure characteristics with a single number, M, patterned after a Reynolds number-friction factor correlation. A simple alignment chart was constructed that can be used to determine M for catheters of regular internal diameter and given length. If tapers, side holes, or integral connectors are present, M can be determined in-vitro with water by measuring pressure drop at various flows. The chart describes flow pressure functions for blood (Hct = 0.41) if M is known. Using this system, any catheter, needle, valve seat, extracorporeal tubing, or vascular graft can be assigned a single number that describes hydrodynamic performance characteristics.
Authors:
J P Montoya; S I Merz; R H Bartlett
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  ASAIO transactions / American Society for Artificial Internal Organs     Volume:  37     ISSN:  0889-7190     ISO Abbreviation:  ASAIO Trans     Publication Date:    1991 Jan-Mar
Date Detail:
Created Date:  1991-05-16     Completed Date:  1991-05-16     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  8611947     Medline TA:  ASAIO Trans     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  4-8     Citation Subset:  IM    
Affiliation:
Department of Surgery, University of Michigan Medical School, Ann Arbor 48109-0331.
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MeSH Terms
Descriptor/Qualifier:
Catheters, Indwelling / classification*
Equipment Design
Humans
Pressure
Rheology

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


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