Lead for pacing
The present application relates to a lead for pacing, including: an insulating layer, an electrode head, and at least one anchoring member, where the electrode head is movable relative to the insulating layer between a first position and a second position; the at least one anchoring member is movable relative to the insulating layer between a third position and a fourth position, where the first position is closer to a proximal end of the lead than the second position; the third position is closer to the proximal end of the lead than the fourth position; the electrode head in the first position and the at least one anchoring member in the third position are located within the insulating layer, where an electrode extension portion is a part of the electrode head extending out of the insulating layer.
1 . A lead for pacing, comprising: an insulating layer, an electrode head, at least one anchoring member, a first pushing rod, and a movable portion, wherein the electrode head is movable relative to the insulating layer between a first position and a second position; the at least one anchoring member is movable relative to the insulating layer between a third position and a fourth position, wherein the first position is closer to a proximal end of the lead than the second position; the third position is closer to the proximal end of the lead than the fourth position;
the electrode head in the first position and the at least one anchoring member in the third position are located within the insulating layer; the electrode head in the second position partially or completely extends out of the insulating layer; the at least one anchoring member in the fourth position partially or completely extends out of the insulating layer; a cross section of an electrode extension portion of the electrode head does not increase from a proximal end to a distal end along an axial direction of the electrode head, and a cross section of a member extension portion of each anchoring member of the at least one anchoring member does not increase from a proximal end to a distal end along an axial direction of each anchoring member respectively, wherein the electrode extension portion is a part of the electrode head extending out of the insulating layer, and the member extension portion is a part of the anchoring member extending out of the insulating layer;
the electrode head comprises a first cylindrical portion and a first tapered head connected sequentially from the proximal end to the distal end along the axial direction of the electrode head, or the electrode head is tapered;
the anchoring member comprises a second cylindrical portion and a second tapered head connected sequentially from the proximal end to the distal end along the axial direction of the anchoring member, or the anchoring member is tapered;
wherein the first pushing rod is fixedly connected to the electrode head; the movable portion is formed with a first through hole for the first pushing rod to pass through, and the first pushing rod and the first through hole are in interference connection; the at least one anchoring member is mounted on the movable portion, wherein the movable portion is movably mounted in the insulating layer; wherein when pushing the first pushing rod, the first pushing rod drives the movable portion to move, thereby driving the at least one anchoring member to move.
2 . The lead for pacing according to claim 1 , wherein when pushing the first pushing rod, the first pushing rod moves distally to drive the electrode head to move from the first position to the second position and drive the at least one anchoring member to move from the third position to the fourth position, the at least one anchoring member extends out of the insulating layer before the electrode head extends out of the insulating layer.
3 . The lead for pacing according to claim 1 , wherein the insulating layer is arranged with an annular groove formed by recessing inwardly, and the annular groove circumferentially surrounds the insulating layer.
4 . The lead for pacing according to claim 3 , wherein the at least one anchoring member comprises three anchoring members.
5 . The lead for pacing according to claim 1 , wherein the insulating layer is formed with a first cathode interface, a second cathode interface, a first anode interface, and a second anode interface, wherein the first cathode interface and the second cathode interface are in communication with each other, and the first anode interface and the second anode interface are in communication with each other.
6 . The lead for pacing according to claim 1 , wherein the at least one anchoring member is configured to fix the lead for pacing to heart tissue; the at least one anchoring member is configured to be inserted into the heart tissue when the at least one anchoring member is in the fourth position; the at least one anchoring member does not hook the heart tissue when the at least one anchoring member moves from the fourth position to the third position; the electrode head is configured to be inserted into the heart tissue when the electrode head is in the second position; the electrode head does not hook the heart tissue when the electrode head moves from the second position to the first position.