Velocity measurements inside a hemodialysis graft in vitro model

David S. Smith, Hisham S. Bassiouny, Jennifer K. Grogan, Francis Loth, Paul Fischer, Sang Wook Lee

Research output: Contribution to journalConference articlepeer-review

Abstract

Arteriovenous (AV) grafts, which provide an access site for hemodialysis, typically produce a high flow rate environment with pressure and velocity fluctuations; high and low wall shear stress, and vibration. Laser Doppler anemometry (LDA) was performed at Reynolds number (Re) 1200 on an in vitro model, which was constructed from computerized tomography (CT) images of a perfusion fixed plastic cast of a canine venous anastomosis. The results obtained were compared to numerical results and to results previously obtained with idealized in vitro models. This study showed the importance of an accurate geometry in characterizing the flow environment inside an AV graft. Good agreement between the computational fluid dynamics (CFD) and LDA was observed although differences were clearly present.

Original languageEnglish (US)
Article numberIMECE2004-62031
Pages (from-to)55-56
Number of pages2
JournalAdvances in Bioengineering, BED
DOIs
StatePublished - Jan 1 2004
Externally publishedYes
Event2004 ASME International Mechanical Engineering Congress and Exposition, IMECE - Anaheim, CA, United States
Duration: Nov 13 2004Nov 19 2004

ASJC Scopus subject areas

  • Engineering(all)

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