A randomized multicenter study of 190 patients at 13 medical centers shows - for the first time - the "superior" benefit of stent grafts over balloon angioplasty for maintaining function of dialysis access grafts in kidney failure patients who undergo dialysis. Until now, no other therapy has proven more effective than angioplasty. At six months, the stent grafts allowed dialysis patients to continue life-saving treatment with significantly fewer interruptions and invasive procedures, according to a study published in the Feb. 11 issue of the New England Journal of Medicine... 
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