Importance

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Abstract

A deployment device for deploying a self-expansible medical implant at a target location in a body cavity, is provided. While generally, the expansion of self-expansible structures tends to be abrupt, and the impact of expansion may cause injury, a two-stage expansion process of the present invention minimizes the impact of exapnsion. Additionally, an ability to manuever the medical imlant into position, after the first stage of expansion, provides for accurate positioning. Thus the present invention is of a deployment device for precise and well-controlled manner of deployment, so as to minimize damage to the cavity wall and to position the implant accurately at the target location. The deployment device includes: an inner tube; an outer tube; and an implant received on the inner tube and enclosed by the outer tube. The implant has a self-expansible anchoring element which is in a contracted condition when enclosed by the outer tube, expands to a partially-expanded condition when the outer tube is retracted, and expands to a fully-expanded condition when the inner tube is removed.. The implant is deployed by introducing the deployment device to the target location in the body cavity; retracting the outer tube with respect to the implant such that the anchoring element self-expands from its contracted condition to its partially-expanded condition; and withdrawing the inner tube from the implant such that the anchoring element self-expands from its partially-expanded condition to its fully-expanded condition to firmly fix the implant at the target location within the body cavity.

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First Claim