Spring controlled stent delivery system

摘要

A stent delivery system and a method for releasably constraining a stent and a method of implanting a stent are provided. The stent delivery system includes an elongate shaft including a proximal portion, a distal portion, a lumen extending at least partially therethrough, and a stent receiving portion on the distal portion of the shaft. The stent delivery system also includes a stent positioned at the stent receiving portion of the elongate shaft, the stent having a constrained configuration and an expanded configuration. A first biasing member is operably connected to the shaft and the stent and a second biasing member is operably connected to the shaft and the stent. The first and second biasing members have a first configuration cooperatively applying a longitudinal tensioning force to the stent and a second configuration cooperatively releasing the longitudinal tensioning force on the stent.

主权项

1. A stent delivery system comprising:
an elongate shaft including a proximal portion, a distal portion, a lumen extending at least partially therethrough, and a stent receiving portion on the distal portion of the elongate shaft; a stent positioned at the stent receiving portion of the elongate shaft, the stent having a constrained configuration and an expanded configuration; a first biasing member operably connected to the elongate shaft and the stent; a second biasing member operably connected to the elongate shaft and the stent, a first pull wire operably connected to the first biasing member and configured to move the stent between the constrained and expanded configurations; anda second pull wire operably connected to the second biasing member;
wherein the first and second biasing members have a first configuration cooperatively applying a longitudinal tensioning force to the stent and a second configuration cooperatively releasing the longitudinal tensioning force on the stent and wherein the second pull wire is configured to cooperate with the first pull wire to move the stent between the constrained and expanded configurations.