Leadless intra-cardiac medical device with reduced number of feed-thrus

摘要

A leadless implantable medical device (LIMD) includes a housing formed from a battery and an end cap. A proximal end of the end cap forms an LIMD proximal end and a distal end of the battery case forms an LIMD distal end. A non-conductive coupler mechanically secures a terminal end of the battery case to a mating end of the end cap, while maintaining the battery case and end cap electrically separated. A first electrode projects from the proximal end of the end cap. An intra-cardiac (IC) device extension projects from the distal end of the battery case. The extension includes a second electrode that is electrically connected to the battery case. The second electrode is located remote from the LIMD distal end. An electronics module is located within an internal cavity of the end cap and communicates with the first and second electrodes.

主权项

1. A method for providing a leadless implantable medical device (LIMD) configured to be implanted within a local chamber of the heart, said method comprising:
forming a housing from a battery and an end cap, the battery having a battery case with a distal end and a terminal end, the end cap having a mating end and a proximal end, the proximal end of the end cap forming an LIMD proximal end and the distal end of the battery case forming an LIMD distal end; mechanically securing the terminal end of the battery case to the mating end of the end cap with a non-conductive coupler, while maintaining the battery case and end cap electrically separated from one another; joining a first electrode to the proximal end of the end cap, the first electrode oriented to project from the LIMD proximal end and configured to engage tissue at a first activation site; and attaching a second electrode that is electrically connected to the battery case, in a manner that the battery case forms part of a circuit that connects the second electrode to tissue at a second activation site.