Surgical techniques and closure devices for direct cardiac catheterization

摘要

A surgical closure device (100) includes (a) a continuous loop (110), which defines an opening (112) therethrough, and which is configured to assume at least an open shape and a closed shape, and (b) four or more tissue anchors (130), coupled to the loop (110). An area of the opening (112) when the loop (110) assumes the closed shape is less than 80% of the area of the opening (112) when the loop (110) assumes the open shape. The loop (110) is configured such that, as the loop (110) transitions from the open shape to the closed shape, all of the anchors (130) move in generally radial directions, and do not move in generally circumferential directions; and a first set of two or more of the anchors (130A) move on average a first distance, and a second set of two or more of the anchors (130B) move on average a second distance that is between 40% and 80% of the first distance.

主权项

1. Apparatus comprising a surgical closure device for anchoring to a tissue, which comprises:
a continuous loop, which defines an opening therethrough, and which is configured to assume at least an open shape and a closed shape, wherein an area of the opening when the loop assumes the closed shape is less than 80% of the area of the opening when the loop assumes the open shape; and four or more tissue anchors, which are coupled to the loop, wherein each of said tissue anchors comprises a barb for irreversibly anchoring to the tissue, wherein the loop is configured such that, as the loop transitions from the open shape to the closed shape:
all of the tissue anchors move in generally radial directions, and do not move in generally circumferential directions, anda first set of two or more of the tissue anchors move on average a first distance, and a second set of two or more of the tissue anchors move on average a second distance that is between 40% and 80% of the first distance.