STENTING OF A RENAL-ARTERY STENOSIS ACHIEVES BETTER RELIEF OF THE OBSTRUCTIVE LESION THAN BALLOON ANGIOPLASTY

A balloon-expandable (Palmaz-Schatz(TM)) stainless steel stent was utilized following balloon angioplasty (PTRA) to determine if the obstructive lesion, using quantitative methods (automated measuring the diameter stenosis, and transstenotic peak systolic and mean pressure gradients), was significantly further reduced or abolished. Hemodynamic transstenotic gradient and stenoses measurements were made during 21 renal artery stenting procedures; prior and following PTRA, and subsequent to stent deployment. The stent sizes placed in the renal arteries were 5 mm (19%), 6 mm (67%), and 7 mm (14%). The results were as follows: [GRAPHICS] The balloon-expandable (Palmaz-Schatz(TM)) stent significantly further reduced, and in fact effectively abolished, the obstructive renal artery lesion in comparison to balloon angioplasty (PTRA). The stent's effectiveness with regard lesion recurrence, maintenance, and preservation of renal function; cure or improved management of hypertension; and survival will be determined by careful clinic follow-up. (C) 1993 Wiley-Liss, Inc.