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Radiology, Vol 199, 653-657, Copyright © 1996 by Radiological Society of North America

ARTICLES

Detection and treatment of dysfunctional hemodialysis access grafts: effect of a surveillance program on graft patency and the incidence of thrombosis

AA Safa, K Valji, AC Roberts, TW Ziegler, RJ Hye and SB Oglevie
Department of Radiology, University of California San Diego Medical Center 92103, USA.

PURPOSE: To determine the value of a hemodialysis graft surveillance program in reducing the incidence of graft thrombosis and prolonging graft patency by means of early detection and percutaneous transluminal angioplasty (PTA) of graft-related stenoses. MATERIALS AND METHODS: For 4-1/2 years, routine graft examination and measurement of several dialysis parameters were used to identify 106 cases of suspected graft dysfunction in 57 patients (56 men, one woman; aged 27-76 years). Graft- related stenoses detected with angiography were treated with PTA. RESULTS: Abnormal physical examination findings were the most common sole indication of graft dysfunction. Of the 106 cases referred for angiographic evaluation, 97 (92%) had at least one lesion. PTA was successful in 88 of 90 treated cases. The primary patency rates at 1 year were 16% for arteriovenous fistulas (AVFs) and 23% for polytetrafluoroethylene (PTFE) grafts. Early detection of stenoses by means of surveillance and repeated PTA enabled 1-year primary assisted patency rates of 67% for AVFs and 68% for PTFE grafts. The incidence of graft thrombosis fell from 48% in 1988 to 17% in 1994 (P < .001). CONCLUSION: The hemodialysis graft surveillance program resulted in a statistically significant reduction in the incidence of graft thrombosis. Although primary patency rates after PTA were low, repeated PTA of detected stenoses allowed good primary assisted patency rates.


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