Subthreshold lead impedance measurement for subcutaneous device

Patent metadata

Field	Value
Publication number	US-8972005-B2
Application number	US-201313795471-A
Country	US
Kind code	B2
Filing date	Mar 12, 2013
Priority date	Mar 12, 2013
Publication date	Mar 3, 2015
Grant date	Mar 3, 2015

Abstract

A subthreshold lead impedance technique is described for an implantable medical device. The lead impedance technique may be applicable to a subcutaneous implantable cardioversion defibrillator device and utilizes an output circuit of the device coupled between a first diode and a second diode to define a current path through two electrodes coupled to the output circuit. The second diode is further coupled to a switch to provide a current pathway from the first diode to circuit ground. A control circuit is coupled to the output circuit, the first diode, the second diode, and the switch to bias a leg of the output circuit in a conducting state while biasing the other legs of the output circuit in a non-conducting state.

First claim

What is claimed is:

1. An implantable medical system, comprising:
a housing;
a lead coupled to the housing;
a first electrode coupled at a distal end of the lead;
a second electrode;
an operational circuitry disposed within the housing, the operational circuitry including:
an energy source;
a diode electrically coupled to the energy source at a first terminal;
an output circuit arrayed having a high side and a low side and including four interconnected legs, the high…

Assignees

• Medtronic Inc

Inventors

• Rasmussen Marshall J
• Pape Forrest C M
• Cabelka Lonny V

Classifications

• A61N1/378 Primary

  Human Necessities · mapped topic

• A61N1/3625

  Human Necessities · mapped topic

• A61N1/3912

  Human Necessities · mapped topic

• A61N1/3706

  Human Necessities · mapped topic

• A61N1/3981

  Human Necessities · mapped topic