METHODS AND APPARATUS FOR FIXING SHEET-LIKE MATERIALS TO A TARGET TISSUE

摘要

A staple for attaching a sheet-like implant to tissue or bone may include first and second arms, and first and second flukes. In some embodiments, the first arm has a proximal end and a distal end, and the second arm has a proximal end and a distal end. A bridge extends from the proximal end of the first arm to the proximal end of the second arm. The first fluke has a proximal end abutting the distal end of the first arm, and the first fluke extends distally from the first arm. The first fluke has a lateral extent larger than a lateral extent of the first arm and is mounted eccentrically thereto. The first fluke includes a proximal surface projecting at an outward angle in a proximal direction away from the distal end of the first arm to engage the tissue or bone when inserted therein. The second fluke has similar features. This arrangement causes the first and second flukes to rotate in response to a pullout force on the bridge. Methods for attaching a sheet-like implant to a target tissue are also disclosed.

主权项

1. A staple for attaching a sheet-like implant to tissue or bone comprising:
a first arm, having a proximal end and a distal end, and a second arm having a proximal end and a distal end with a bridge extending from the proximal end of the first arm to the proximal end of the second arm; a first fluke having a proximal end abutting the distal end of the first arm, the first fluke extending distally from the first arm, the first fluke having a lateral extent larger than a lateral extent of the first arm and mounted eccentrically thereto, the first fluke including a proximal surface projecting at an outward angle in a proximal direction away from the distal end of the first arm to engage the tissue or bone when inserted therein causing the first fluke to rotate in response to a pullout force on the bridge; and, a second fluke having a proximal end abutting the distal end of the second arm and extending distally, the second fluke having a lateral extent larger than the lateral extent of the second arm and mounted eccentrically thereto with the second fluke including a proximal surface projecting at an outward angle in a proximal direction and away from the second arm near the proximal end of the second fluke to engage the tissue or bone when inserted therein causing the second fluke to rotate in response to a pullout force on the bridge.