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VENTED IMPLANTABLE DRUG-DELIVERY DEVICE AND RELATED METHODS

  • US 20140371674A1
  • Filed: 06/17/2014
  • Published: 12/18/2014
  • Est. Priority Date: 06/17/2013
  • Status: Active Grant
First Claim
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1. An implantable device for administering a liquid, the device comprising:

  • a housing including an aperture therethrough;

    within the housing, a pump assembly including a reservoir, a gas-driven forcing mechanism and a cannula for conducting liquid from the reservoir to an ejection site exterior to the housing in response to pressure applied by the forcing mechanism; and

    external to the pumping mechanism but within the housing and spanning the aperture, a membrane structure comprising a gas-permeable membrane and at least one support layer attached thereto, the membrane structure being permeable to gas but not to liquid at least within the area thereof exposed by the aperture.

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