Leadless cardiac pacemaker and retrieval device

摘要

A retrieval device and an associated implantable cardiac pacing device. The retrieval device includes a grasping mechanism configured to capture a docking member of the implantable cardiac pacing device to draw the implantable cardiac pacing device into the lumen of a retrieval catheter. The grasping mechanism is expandable from a first position to a second position and is biased toward the first position in an equilibrium condition. The grasping mechanism is configured to surround and pass over a head portion of the docking member in the second position, and be contracted toward the first position to capture the docking member with the grasping mechanism.

主权项

1. An assembly for retrieving an implantable cardiac pacing device, comprising:
an implantable cardiac pacing device having a housing, an electrode positioned proximate a distal end of the housing, and a docking member extending from a proximal end of the housing opposite the distal end, the docking member including a head portion and a neck portion extending between the housing and the head portion; and a retrieval system including:
a retrieval catheter having a proximal end, a distal end, and a lumen extending into the retrieval catheter from the distal end; anda retrieval device advanceable from the distal end of the retrieval catheter, the retrieval device having a grasping mechanism configured to capture the docking member to draw the implantable cardiac pacing device into the lumen of the retrieval catheter; wherein the grasping mechanism is expandable from a first position to a second position, the grasping mechanism being biased toward the first position in an equilibrium condition; wherein the grasping mechanism is configured to surround and pass over the head portion of the docking member in the second position, and be contracted toward the first position to capture the docking member with the grasping mechanism; wherein the grasping mechanism includes an inflatable balloon; wherein the inflatable balloon includes an annular portion defining a distal opening extending proximally into the balloon; and wherein the inflatable balloon includes a resilient annular ring extending around a rim of the distal opening.