Document Detail


Dynamic pressure measurement for detection of blood access stenosis.
MedLine Citation:
PMID:  10222916     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A novel method for detection of access failure has been developed. It is based on the continuous evaluation of pre-pump arterial and venous pressure in the extracorporeal circuit. Knowing the flow resistance properties of the arterial and venous branches of the extracorporeal circuit from in-vitro measurements and the height differences, calculating the fistula pressure dynamically is possible. The fistula pressure allows identification of access failure as has been shown by other authors. The dynamic measurement however allows identification of bad needle placement. Dynamic measurement at different flow rates and comparison with static measurements allow for the identification of intra-access stenosis. The mathematical algorithm is described and pressure-flow curves for two sets of extracorporeal circuits are shown. In-vivo examples show a "normal" fistula and a fistula with intra-access stenosis.
Authors:
H D Polaschegg; F Techert; V Wizemann
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  EDTNA/ERCA journal (English ed.)     Volume:  24     ISSN:  1019-083X     ISO Abbreviation:  EDTNA ERCA J     Publication Date:    1998 Oct-Dec
Date Detail:
Created Date:  1999-11-26     Completed Date:  1999-11-26     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  9805754     Medline TA:  EDTNA ERCA J     Country:  BELGIUM    
Other Details:
Languages:  eng     Pagination:  39-44     Citation Subset:  N    
Affiliation:
Georg-Haas-Dialysezentrum, Giessen, Germany.
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MeSH Terms
Descriptor/Qualifier:
Algorithms
Arteriovenous Shunt, Surgical / adverse effects*
Blood Pressure
Blood Pressure Determination / methods*
Graft Occlusion, Vascular / diagnosis*,  etiology,  physiopathology
Humans
Mathematics
Renal Dialysis / instrumentation*
Thrombosis / diagnosis*,  etiology,  physiopathology

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


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