Tissue fixation devices and methods
First Claim
1. A tissue gripping device comprising:
- a flexible member formed from a shape-memory material, the flexible member comprising a base section and an arm, the arm having a first end connected to the base section, a free end extending away from the base section, and an attachment surface disposed between the first end and the free end;
at least one tissue gripping member formed from a second material, the second material being more rigid than the shape-memory material, the tissue gripping member comprising a mating surface coupled to the attachment surface of the arm to join the tissue gripping member to the flexible member, and a tissue gripping surface disposed opposite the mating surface, the tissue gripping surface including a frictional element configured to resist movement of tissue away from the tissue gripping surface after a tissue has contacted the tissue gripping surface, the frictional element being formed as a plurality of raised barbs disposed along a side edge of the tissue gripping member, and wherein the tissue gripping member includes a plurality of slotted recesses disposed along the side edge at sections adjacent to the raised barbs; and
at least one suture line encircling at least a portion of the tissue gripping member and at least a portion of the arm, the suture line being configured to fasten the tissue gripping member to the arm, the suture line passing through and lodging within one or more of the slotted recesses as it encircles the tissue gripping member and the arm.
1 Assignment
0 Petitions
Accused Products
Abstract
The present disclosure describes tissue gripping devices, systems, and methods for gripping mitral valve tissue during treatment of a mitral valve and while a tissue fixation device is implanted in the mitral valve. The tissue gripping device includes a flexible member and one or more tissue gripping members coupled to one or more arms of the flexible member. The flexible member is formed from a shape-memory material, such as nitinol, and the tissue gripping member(s) are formed from a material that is more rigid than the shape-memory material. The tissue gripping member(s) are attached to the flexible member by threading or looping suture lines around and/or through the tissue gripping member(s) and the flexible member and/or by applying a cover material to the tissue gripping device to hold the tissue gripping member(s) against the flexible member.
-
Citations
17 Claims
-
1. A tissue gripping device comprising:
-
a flexible member formed from a shape-memory material, the flexible member comprising a base section and an arm, the arm having a first end connected to the base section, a free end extending away from the base section, and an attachment surface disposed between the first end and the free end; at least one tissue gripping member formed from a second material, the second material being more rigid than the shape-memory material, the tissue gripping member comprising a mating surface coupled to the attachment surface of the arm to join the tissue gripping member to the flexible member, and a tissue gripping surface disposed opposite the mating surface, the tissue gripping surface including a frictional element configured to resist movement of tissue away from the tissue gripping surface after a tissue has contacted the tissue gripping surface, the frictional element being formed as a plurality of raised barbs disposed along a side edge of the tissue gripping member, and wherein the tissue gripping member includes a plurality of slotted recesses disposed along the side edge at sections adjacent to the raised barbs; and at least one suture line encircling at least a portion of the tissue gripping member and at least a portion of the arm, the suture line being configured to fasten the tissue gripping member to the arm, the suture line passing through and lodging within one or more of the slotted recesses as it encircles the tissue gripping member and the arm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A tissue fixation system configured for intravascular delivery and for use in joining mitral valve tissue during treatment of the mitral valve, the system comprising:
-
a body; a proximal element comprising; a flexible member formed from a shape-memory material, the flexible member comprising a base section and an arm, the arm having a first end connected to the base section, a free end extending away from the base section, and an attachment surface disposed between the first end and the free end; and at least one tissue gripping member formed from a second material, the second material being more rigid than the shape-memory material, the tissue gripping member comprising a mating surface coupled to the attachment surface of the arm to join the tissue gripping member to the flexible member, and a tissue gripping surface disposed opposite the mating surface, the tissue gripping surface including a frictional element configured to resist movement of tissue away from the tissue gripping surface after tissue has contacted the tissue gripping surface, wherein the frictional element is formed as a plurality of raised barbs disposed along a side edge of the tissue gripping member, and wherein the tissue gripping member includes a plurality of slotted recesses disposed along the side edge at sections adjacent to the raised barbs, and wherein the arm further comprises at least one hole and the tissue gripping member further comprises at least one hole configured to correspond with the hole of the arm as the mating surface of the tissue gripping member is coupled to the attachment surface of the arm, and the proximal element further comprising at least one suture line encircling the tissue gripping member and the arm, the suture line passing through the hole of the arm and the hole of the tissue gripping member and passing through and lodging within one or more of the slotted recesses; and a distal element having a first end pivotally coupled to the body and extending to a free second end and a tissue engagement surface between the first and second end, the tissue engagement surface being configured to approximate and engage a portion of the leaflets of the mitral valve, wherein the proximal element is configured to cooperate with the distal element to form a space for receiving a portion of mitral valve tissue therebetween. - View Dependent Claims (11)
-
-
12. A tissue gripping device comprising:
-
a flexible member formed from a shape-memory material, the flexible member comprising a base section and an arm, the arm having a first end connected to the base section, a free end extending away from the base section, and an attachment surface disposed between the first end and the free end; at least one tissue gripping member formed from a second material, the second material being more rigid than the shape-memory material, the tissue gripping member comprising a mating surface coupled to the attachment surface of the arm to join the tissue gripping member to the flexible member, and a tissue gripping surface disposed opposite the mating surface, the tissue gripping surface including a frictional element configured to resist movement of tissue away from the tissue gripping surface after tissue has contacted the tissue gripping surface; and a suture line configured to fasten the tissue gripping member to the arm, wherein the arm further comprises at least one hole, and wherein the tissue gripping member further comprises at least one hole configured to correspond with the hole of the arm as the mating surface of the tissue gripping member is coupled to the attachment surface of the arm, and wherein the suture line passes through the hole of the arm and the hole of the tissue gripping member. - View Dependent Claims (13, 14, 15, 16, 17)
-
Specification