Stent deployment device with two coaxial balloons

摘要

A stent delivery device (10) having two coaxially arranged balloons (32,34) at a proximal end 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 sheath (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 expanded by inflation of the non-compliant balloon (32). <IMAGE>