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ELECTRICALLY SHIELDED, GAS-PERMEABLE IMPLANTABLE ELECTRO-MEDICAL APPARATUS

  • US 3,718,142 A
  • Filed: 04/23/1971
  • Issued: 02/27/1973
  • Est. Priority Date: 04/23/1971
  • Status: Expired due to Term
First Claim
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1. In an implantable stimulator of the type having electronic circuitry and gas generating battery means all encased in a material having a substantially higher permeability to battery gas than body fluids, and at least one electrode, the improvement which comprises:

  • film means covering said encasing material for allowing the escape of battery gases from said encasing material while preventing the passage of substantial amounts of body fluids therethrough, said film means comprising a thin film of metal capable of shielding the electronic circuitry from extraneous interference signals.

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