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Detecting needle entry into a port of an infusion device

  • US 7,942,863 B2
  • Filed: 03/29/2007
  • Issued: 05/17/2011
  • Est. Priority Date: 03/29/2007
  • Status: Active Grant
First Claim
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1. A method for detecting insertion of a needle into a port chamber of an implantable infusion device, the device including a port assembly defining the port chamber, the port assembly having a septum disposed across the port chamber to fluidly seal the port chamber relative to an exterior of the device, the method comprising:

  • sensing, via a pressure sensor in fluid communication with the port chamber, a pressure change in the port chamber; and

    ,determining, via electronics operably coupled to the pressure sensor, whether the sensed pressure change is indicative of insertion of the needle through the septum into the port chamber prior to dispensing fluid into the port chamber.

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