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Titolo:
Influence of crimping textile polyester vascular prostheses on the fluid flow kinetics
Autore:
Ben Abdessalem, S; Chakfe, N; Le Magnen, JF; Beaufigeau, M; Adolphe, D; Geny, B; Akesbi, S; Riepe, G; Kretz, JG; Durand, B;
Indirizzi:
Ecole Natl Super Ind Twxt Mulhouse, Lab Phys & Mecan Text, Mulhouse, France Ecole Natl Super Ind Twxt Mulhouse Mulhouse France xt, Mulhouse, France
Titolo Testata:
EUROPEAN JOURNAL OF VASCULAR AND ENDOVASCULAR SURGERY
fascicolo: 5, volume: 18, anno: 1999,
pagine: 375 - 380
SICI:
1078-5884(199911)18:5<375:IOCTPV>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
KNEE FEMOROPOPLITEAL BYPASS; GRAFTS; DACRON;
Keywords:
blood-vessel prosthesis; polyester; polyethylene terephthalate; blood flow;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
15
Recensione:
Indirizzi per estratti:
Indirizzo: Chakfe, N Hop Univ Strasbourg, Dept Cardiovasc Surg, 1 Pl Hop,BP 426, F-67091 Strasbourg, France Hop Univ Strasbourg 1 Pl Hop,BP 426 Strasbourg France F-67091 e
Citazione:
S. Ben Abdessalem et al., "Influence of crimping textile polyester vascular prostheses on the fluid flow kinetics", EUR J VAS E, 18(5), 1999, pp. 375-380

Abstract

Objectives: to characterise the impact of the crimping of polyester prostheses on the fluid flow kinetics. Design: an experimental in vitro study. Materials and methods: we investigated four models of polyester vascular prostheses in a continuous laminar flow circuit. The flow velocity was 80 ml/s for all experiments. We studied two fluids of different viscosity withinthe circuit. The speed of the particles was measured by a laser Doppler anemometer 2 to 52 mm from the prosthetic interface. We first established a calibrated flow-velocity profile corresponding to the study of the support inside the circuit without any prosthesis. We measured the velocity profilesfor each prosthesis corresponding to four crimp densities obtained by stretching the grafts. Results: the crimping of PET textile prostheses led to a decrease of flow velocity especially closer to the prosthetic surface. The decrease of flow velocity was dependent on the model of prosthesis. This decrease of flow velocity is described by the following negative Exponential law: Delta V=a.b(-x) where (a) is the crimp density and (b) the fluid viscosity. Conclusions: flow velocity near a prosthetic surface is influenced by the morphology of the crimping. The impact of crimping on the flow velocity in a vascular prosthesis can be predicted by computer simulation models. This may provide the optimal shape of crimping for each prosthesis.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/01/21 alle ore 02:27:15