PULL BACK SLEEVE SYSTEM WITH COMPRESSION RESISTANT INNER SHAFT

摘要

A stent delivery system for delivering a stent comprising, a stent disposed on the distal end of the catheter and an inner core, wherein the inner core is resistant to appreciable compression or accordion. The catheter further comprises a first sheath covering a porti on of the inner core, wherein at least a portion of the distal end of the inner core is left uncovered by the first sheath, a retractable sheath which covers at least a portion of the stent and a portion of the distal end of the inner core and a retracting means for retracting the distal sheath to release the stent. The present invention also discloses a method of making the retractable sheath f or a stent delivery system, comprising the steps of placing a sheath made of material comprising tetrafluoroethylene fluorocarbon polymers or fluorinated ethylene-propylene resins on a mandrel, winding a wire coil around the Teflon.RTM. sheath, heating the tubing, cooling the tubing and removing the mandrel and coil.