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Radiology, Vol 183, 767-771, Copyright © 1992 by Radiological Society of North America
ARTICLES |
KW Johnston
Department of Surgery, University of Toronto, Ont, Canada.
The author presents an alternative statistical analysis of the results of the University of Toronto series of percutaneous transluminal angioplasty (PTA) of the femoral and popliteal arteries (n = 254). After recalculation of the data with the Kaplan-Meier method, the postprocedure success rate ranged from 88.8% +/- 2.0 at 1 month to 35.7% +/- 4.8 at 6 years. With Cox multiple regression analysis, the type of femoropopliteal lesion and the runoff were the variables that were useful to predict late results. For stenoses with good runoff, the success rate was 53% at 5 years; with poor runoff, 31% at 5 years. For occlusions with good runoff, the success rate was 36% at 5 years; with poor runoff, 16% at 5 years. In initially successful cases, ongoing clinical success at 1, 3, and 5 years was better in patients with good runoff at the time of PTA than in those with poor runoff. Now that more recent studies have documented improved technical success in femoropopliteal PTA, a comparative study of the relative safety, long- term clinical efficacy, and cumulative cost of PTA versus surgery seems warranted.
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