STENT DEPLOYMENT DEVICE WITH TWO BALLOONS

摘要

A stent delivery device ¢10! having a pair of balloons ¢32, 34! at a proximal en d of a catheter ¢12! and having separate lumens ¢24, 26! for selectively inflating the respective balloons. The outer balloon ¢34! is relatively compliant and the inner balloon ¢ 32! is relatively non-compliant. A central lumen ¢28! is provided for a guide wire ¢30! A stent ¢36! is carried by the delivery device within an axially retractable sheat h ¢14! at the distal end of the catheter ¢12! and is deployed by retraction of the sheath ¢14! and inflation of the compliant balloon ¢34!, and the stent ¢36! is subsequently expa nded by inflation of the non-compliant balloon ¢32!.