Pacemaker retrieval systems and methods
First Claim
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1. A catheter for retrieving a medical device from a patient, comprising:
- a handle comprising a snare slider;
a catheter shaft coupled to the handle;
a snare disposed within the catheter shaft and extendable distally beyond the catheter shaft, wherein the snare comprises at least one loop;
a docking cap disposed on a distal portion of the catheter shaft, the docking cap being rotatable independent of the catheter shaft; and
a torque shaft disposed within the catheter shaft and selectively connectable to the docking cap, the torque shaft configured to rotate within the catheter shaft to apply rotational torque to the docking cap when connected to the docking cap, wherein a proximal portion of the torque shaft is coupled to the snare slider on the handle and wherein the snare slider to configured so that distal movement of the snare slider advances the torque shaft along the snare to close a diameter of the at least one loop and cause the at least one loop to grasp a retrieval feature of the medical device.
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Abstract
A catheter system for retrieving a leadless cardiac pacemaker from a patient is provided. The cardiac pacemaker can include a docking or retrieval feature configured to be grasped by the catheter system. In some embodiments, the retrieval catheter can include a snare configured to engage the retrieval feature of the pacemaker. The retrieval catheter can include a torque shaft selectively connectable to a docking cap and be configured to apply rotational torque to a pacemaker to be retrieved. Methods of delivering the leadless cardiac pacemaker with the delivery system are also provided.
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Citations
28 Claims
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1. A catheter for retrieving a medical device from a patient, comprising:
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a handle comprising a snare slider; a catheter shaft coupled to the handle; a snare disposed within the catheter shaft and extendable distally beyond the catheter shaft, wherein the snare comprises at least one loop; a docking cap disposed on a distal portion of the catheter shaft, the docking cap being rotatable independent of the catheter shaft; and a torque shaft disposed within the catheter shaft and selectively connectable to the docking cap, the torque shaft configured to rotate within the catheter shaft to apply rotational torque to the docking cap when connected to the docking cap, wherein a proximal portion of the torque shaft is coupled to the snare slider on the handle and wherein the snare slider to configured so that distal movement of the snare slider advances the torque shaft along the snare to close a diameter of the at least one loop and cause the at least one loop to grasp a retrieval feature of the medical device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A leadless pacemaker and retrieval system, comprising:
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a leadless cardiac pacemaker having a retrieval feature coupled to the pacemaker with at least one flexible stem; and a delivery catheter comprising; a handle comprising a snare slider; a catheter shaft coupled to the handle; a snare disposed within the catheter shaft and extendable distally beyond the catheter shaft, wherein the snare comprises at least one loop; a docking cap disposed on a distal portion of the catheter shaft, the docking cap being rotatable independent of the catheter shaft and being sized and configured to receive the retrieval feature of the leadless cardiac pacemaker; and a torque shaft disposed within the catheter shaft and selectively connectable to the docking cap, the torque shaft configured to rotate within the catheter shaft to apply rotational torque to the docking cap when connected to the docking cap, and to apply rotational torque to the leadless cardiac pacemaker when the pacemaker is disposed in the docking cap, wherein a proximal portion of the torque shaft is coupled to the snare slider and wherein the snare slider is configured so that distal movement of the snare slider advances the torque shaft along the snare to close a diameter of the at least one loop and cause the at least one loop to grasp the retrieval feature of the medical device. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A method of retrieving a medical device from a patient, comprising:
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positioning a snare of a catheter in proximity to a retrieval feature of the medical device, the snare comprising at least one loop; moving a snare slider distally to advance a torque shaft along the snare to close a diameter of the at least one loop and cause the at least one loop to grasp a retrieval feature of the medical device; pulling the snare proximally into the catheter to position the retrieval feature of the medical device inside a docking cap of the catheter; and applying rotational torque from the docking cap to the medical device by rotating the torque shaft to unscrew the medical device from tissue in the patient. - View Dependent Claims (28)
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Specification