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EP0033242A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Implantable pulse generator with passive sensing reference electrode

Assignee: Medtronic Inc
•
Filing: 1981-01-23
•
Granted: —
•
Expires: 2001-01-23
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Abstract

Abstract A passive sensing reference electrode 10 is positioned on an implantable pulse generator 12 arranged to supply stimulation pulses to a stimulation electrode and an indifferent or stimulation reference electrode and the sensing reference electrode electrically contacts with tissue or body fluid. The electrode configuration reduces stimulation afterpotentials due to electrode polarization and output capacitor recharge by using the passive sensing reference electrode for sensing. The passive sensing reference electrode may be located adjacent the conductor sleeve 16a, on a surface of a hermetically sealed metallic pacemaker can 14, or one of the surfaces of the pacemaker can may be insulated from other surface of the pacemaker can where one part of the pacemaker can may serve as the passive sensing reference electrode.

Inventors

  • 👤 Fredric W. Lindemans

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-05 20:55
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/36; A61N1/362; A61N1/365; A61N1/372; A61N1/375; A61N1/37512

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 101 words
An implantable pulse generator arranged to be coupled to body tissue by a remote electrode, comprising: a hermetically sealed enclosure; pulse generator means .within said enclosure and having output terminals, one of said terminals being coupled to said remote electrode for providing stimulating pulses; a stimulating reference electrode coupled to the other output terminal of said pulse generator means; sense amplifier means having input terminals, one input terminal being coupled to said remote electrode for sensing electrical signals; and a passive sensing reference electrode on the outer surface of the enclosure and coupled to another input of said sensing amplifier means.
Claim 2
Dependent Claim 101 words
An implantable pulse generator arranged to be coupled to body tissue by a remote electrode, comprising: a hermetically sealed enclosure; pulse generator means .within said enclosure and having output terminals, one of said terminals being coupled to said remote electrode for providing stimulating pulses; a stimulating reference electrode coupled to the other output terminal of said pulse generator means; sense amplifier means having input terminals, one input terminal being coupled to said remote electrode for sensing electrical signals; and a passive sensing reference electrode on the outer surface of the enclosure and coupled to another input of said sensing amplifier means.
Claim 3
Dependent Claim 27 words
An implantable pulse generator as claimed in claim 1 wherein the enclosure is a metal can and the sensing reference electrode is isolated from the metal can.
Claim 4
Dependent Claim 21 words
An implantable pulse generator as claimed in claim 2 wherein the stimulating reference electrode is a portion of the metal can.
Claim 5
Dependent Claim 27 words
An implantable pulse generator as claimed in claim 1, 2 or 3 including a connector block wherein said sensing reference electrode is positioned on said connector block.
Claim 6
Dependent Claim 26 words
An implantable pulse generator as claimed in claim 1, 2 or 3 wherein said sensing reference electrode is positioned on a flat surface of said enclosure.
Claim 7
Dependent Claim 33 words
An implantable pulse generator as claimed in claim 1 wherein the enclosure is a metal can separated into two electrically isolated portions and one portion of the can forms the sensing reference electrode.
Claim 8
Dependent Claim 22 words
An implantable pulse generator as claimed in claim. 6 wherein the other portion of the metallic can forms the stimulating reference electrode.
Claim 9
Dependent Claim 24 words
An implantable pulse generator as claimed in claim 6 or 7 wherein said two portions are insulated from each other by a ceramic member.

References Cited (Backward Citations)

US4006748A Cited

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