Fluid pressure-actuated medical device

Details Fluid pressure-actuated medical device Fluid pressure-actuated medical device

A - Human Necessities

61

B

A61B 10/00 (2006.01) A61B 17/22 (2006.01) A61B 17/00 (2006.01) A61B 17/28 (2006.01)

Patent

CA 2501710

An apparatus and method are described for actuating a minimally invasive medical device (100) using fluid pressure. The invention involves a medical device that includes a fluid source, such as a compressible bladder (108) that may apply positive fluid pressure into a sheath (102) to controllably deploy an end-effector (104) from a distal end of the sheath. In some embodiments, the fluid source may apply negative fluid pressure into the sheath to controllably retract the end-effector into the distal end of the sheath. Typical end-effectors for use with the medical device of the invention include biopsy devices and retrieval devices, including basket-type retrieval devices and grasper retrieval devices. Generally, the fluid that is used to actuate the device may be a liquid or a gas, including air.

L'invention concerne un appareil et un procédé permettant d'actionner un dispositif médical (100) non effractif utilisant une pression de fluide. L'invention fait intervenir un dispositif médical comprenant une source de fluide, notamment une vessie compressible (108) susceptible d'appliquer une pression de fluide positive sur une gaine (102) afin de déployer de manière contrôlable un organe terminal effecteur (104) à partir d'une extrémité distale de la gaine. Dans certaines modes de réalisation, la source de fluide peut appliquer une pression fluide négative sur la gaine de manière à rétracter de façon contrôlable l'organe terminal effecteur dans l'extrémité distale de la gaine. Des organes terminaux effecteurs typiques que l'on utilise avec le dispositif médical de cette invention comprennent des dispositifs de biopsie et des dispositifs de retrait, y compris des dispositifs de retrait de type panier et de préhension. Normalement, le fluide utilisé pour actionner le dispositif peut être un liquide ou un gaz, voire de l'air.

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