Device for placing a vascular implant

Abstract

Provided is an implant placement device that includes an envelope that contains an implant with a first auto-expandable element expandable in a radial direction, a nose at a distal end of the envelope, a sheath that confines a portion of the implant therein and restricts expansion of a second auto-expandable element of the implant, and a plunger. The sheath moves within the envelope in a longitudinal direction perpendicular to the radial direction and the plunger moves in the longitudinal direction within the sheath with the implant positioned between an end of the plunger and the nose, to discharge the implant from the device at a desired position. The sheath slides in the longitudinal direction towards the nose to bring the first auto-expandable element in contact with an interior of the plurality of slots, thereby opening the nose.

Description

PRIORITY[0001]This application is a Continuation Application of U.S. patent application Ser. No. 10 / 553,007, which was filed in the U.S. Patent and Trademark Office on Aug. 7, 2006, which is a National Phase Entry of International Application No. PCT / FRO4 / 50118, which was filed on Mar. 22, 2004, and claims priority to French Patent Application Serial No. 0350096, filed on Apr. 4, 2003, the entire disclosure of each of which is incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a device for placing an implant.[0004]2. Description of the Related Art[0005]In general, the related art includes the use of catheters or any other instrument for placing an implant in a vessel of the human or animal body.[0006]The invention may be used for placing objects in a vessel in the form of implants of the stent type or a vascular occlusion device as presented for example in the document WO-A-02 19 926, or implants of the c...

AI Technical Summary

Benefits of technology

The invention is a system that can be used in a vessel surgery. It can be opened and closed to reach different sections of the vessel and can be re-employed there. The implant is protected during movement and released in a gradual manner to prevent any sudden changes in its size.

Problems solved by technology

Another drawback of current inserters is that there remains a dimension transition zone between the internal tapered element and the external wall of the external sheath: this creates a discontinuity in diameter, which may be detrimental to the continuity of the insertion movement and damage the internal wall of the vessels.

The dilation instruments currently known prove to be unsuitable for techniques of the type described in WO-A-02 19 926 in particular because they exclude the presence of a functional element in the internal space thereof before the end of insertion in the vessel.

This trocar, with a tapered and openable end, does however have a highly limited function according to this prior art since it serves only for perforation.

Images