Importance

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Abstract

An introduction catheter set for a collapsible, self-expandable implant of the type comprising a number of spring-biased anchoring legs, e.g. a filter for entrapping thrombi or emboli into a blood vessel of a patient comprises a flexible external guide sheath and a flexible internal catheter slidably displaceable inside the guide sheath and having at its distal end a tubular end member, in which a retaining member is slidably arranged for releasably retaining the anchoring legs of the implant in defined angular positions in respect of each other. The retaining member is connected with a flexible displacement member extending throughout the internal catheter with the proximal ends of the displacement member and the internal catheter connected with a first and a second operating member, respectively. By operation of the operating members the retaining member may be displaced in the tubular end member from a retaining position, in which the anchoring legs of the implant are inside the tubular end member which protrudes from the distal end of the external sheath, to a release position, in which the retaining member protrudes from the tubular end member to release the anchoring legs of the implant.

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First Claim