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1. (WO2018057318) LEADLESS STIMULATION DEVICE WITH A HOUSING THAT HOUSES INTERNAL COMPONENTS OF THE LEADLESS STIMULATION DEVICE AND FUNCTIONS AS THE BATTERY CASE AND A TERMINAL OF AN INTERNAL BATTERY

Pub. No.:    WO/2018/057318    International Application No.:    PCT/US2017/050745
Publication Date: Fri Mar 30 01:59:59 CEST 2018 International Filing Date: Sat Sep 09 01:59:59 CEST 2017
IPC: A61N 1/375
A61N 1/372
H01M 2/10
A61N 1/378
Applicants: CARDIAC PACEMAKERS, INC.
Inventors: LINDER, William J.
MAILE, Keith R.
Title: LEADLESS STIMULATION DEVICE WITH A HOUSING THAT HOUSES INTERNAL COMPONENTS OF THE LEADLESS STIMULATION DEVICE AND FUNCTIONS AS THE BATTERY CASE AND A TERMINAL OF AN INTERNAL BATTERY
Abstract:
Implantable medical devices such as leadless stimulation devices that may provide longer battery life while minimizing device size. In some cases, having the outer housing of the implantable medical device serve multiple roles, such as the battery case for an internal battery, may permit reduced device size by eliminating one or more layers or components within the device. A leadless stimulation device / leadless cardiac pacemaker comprising: a housing having a first end, an opposing second end and a side wall extending between the first end and the second end; a fixation element proximate the first end of the housing; the first end and at least part of the side wall of the housing are conductive, with at least part of the housing that is conductive functioning as a cathode electrode for the LSD, wherein the cathode electrode is exposed to the environment outside of the housing; an anode electrode, spaced from the cathode electrode, exposed to the environment outside of the housing; a battery situated inside the housing, the battery having a negative terminal and a positive terminal, with the negative terminal operatively coupled to the at least part of the housing that is conductive including the cathode electrode; and stimulation circuitry situated inside the housing and operatively coupled to the cathode electrode and the anode electrode, the stimulation circuitry configured to provide a stimulation pulse by applying a voltage difference between the cathode electrode and the anode electrode, with a more negative voltage applied to the cathode electrode than to the anode electrode.