Haemodynamic properties of PTFE femoropopliteal bypass grafts as determined by a new magnetic resonance technique.
Eur J Vasc Endovasc Surg
; 26(5): 544-9, 2003 Nov.
Article
en En
| MEDLINE
| ID: mdl-14532884
ABSTRACT
OBJECTIVES:
To apply the automatic three dimensional paraboloid (3DP) method for measurement of wall shear stress (WSS), blood flow, blood velocity, and cross sectional graft lumen area to magnetic resonance phase contrast velocity mapping data acquired from polytetrafluoroethylene (PTFE) suprageniculate 6 mm femoropopliteal bypass grafts to determine the biomechanical and haemodynamic properties immediately and three years after implantation. MATERIALS ANDMETHODS:
Two patient cohorts, each of ten patients, with intermittent claudication were investigated by the 3DP method, one group (A) within 36 h after implantation of a femoropopliteal graft and the other group (B) 35 months after implantation.RESULTS:
The mean blood flow was 5.9 ml/s (SD 1.6), and WSS at peak systole was 2.2 N/m2 (SD 0.6) 5 cm upstream to the distal anastomosis for group A, and 3.7 ml/s (SD 1.9) and 1.9 N/m2 (SD 0.4) for Group B. The WSS varied according to the angular position of the graft circumference. The implanted grafts were not circular but had a slightly elliptical circumference with a greater anterior/posterior diameter.CONCLUSION:
The 3DP method is a precise tool with subpixel resolution for determining the biomechanical and haemodynamic properties of implanted PTFE grafts, and it can be used to assess graft function immediately after implantation. It is potentially applicable for routine graft surveillance.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Politetrafluoroetileno
/
Arteria Poplítea
/
Velocidad del Flujo Sanguíneo
/
Prótesis Vascular
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Anastomosis Quirúrgica
/
Imagen por Resonancia Magnética
/
Hemorreología
/
Implantación de Prótesis Vascular
/
Arteria Femoral
/
Claudicación Intermitente
Límite:
Aged
/
Aged80
/
Female
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Humans
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Male
/
Middle aged
Idioma:
En
Revista:
Eur J Vasc Endovasc Surg
Asunto de la revista:
ANGIOLOGIA
Año:
2003
Tipo del documento:
Article
País de afiliación:
Dinamarca