Coupling system, applicator tool, attachment ring and method for connecting a conduit to biological tissue

摘要

A coupling system includes an applicator tool and an attachment ring mounted on the applicator tool. Clips are contained within the applicator tool and are deployed through the attachment ring in order to anchor the attachment ring to biological tissue. When deployed, tips of the clips follow a curved trajectory through an annular cuff of the attachment ring and through the underlying tissue. The tips loop back out of the tissue and to a location where they are later trapped or clamped by the attachment ring. While the tips are trapped or clamped, the applicator tool cinches the clips by pulling rear segments of the clips. Thereafter, the applicator tool disconnects from the attachment ring which remains anchored to the tissue and serves as a coupling for a cannula. The cannula can have movable lock members that secure it to the attachment ring.

主权项

1. A clip for securing a prosthesis to tissue, the clip comprising:
a wire body having a forward segment, a rear segment, and a medial segment connecting the forward segment to the rear segment, the forward segment having a tip configured to pierce biological tissue, the medial segment configured to be elastically deformed to a straight configuration and to autonomously return to a curved configuration from the straight configuration; a catch protruding from the rear segment when the rear segment is in a straight configuration, wherein the catch protrudes away from a central axis of the rear segment and the catch is narrower in width than another part of the rear segment; and a plurality of bumps formed on the wire body, wherein each bump protrudes radially outward from a central axis of the wire body.