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Infusion Device

  • US 20070049876A1
  • Filed: 09/18/2006
  • Published: 03/01/2007
  • Est. Priority Date: 07/02/2002
  • Status: Active Grant
First Claim
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1. An infusion device comprising:

  • a body having a body passageway and an outer perimeter;

    a cannula having a portion extending from the body, the cannula being positioned such that any portion of the cannula that is above a patient'"'"'s skin when the infusion device is used is positioned within the outer perimeter of the body;

    the cannula having a cannula passageway defined by a cannula passageway wall, the cannula passageway wall having an inwardly-tapered portion that will be above the patient'"'"'s skin when the infusion device is used;

    a self-sealing septum positioned within the body passageway, the self-sealing septum having a septum top surface, a septum bottom surface, and a bottommost portion, the self-sealing septum being configured such that space above the bottommost portion and below the septum top surface that is occupied by an insertion needle during infusion device insertion is re-occupied by septum material after the insertion needle is removed; and

    an inner surface that directly borders open space within the body passageway that is downstream of the septum and upstream of the inwardly-tapered cannula passageway wall portion, the inner surface defining a first inner surface perimeter positioned in a first plane that is perpendicular to an axis centered in the body passageway, the inner surface also defining a second inner surface perimeter positioned in a second plane that is parallel to and downstream of the first plane, the first inner surface perimeter defining a first cross-sectional area, the second inner surface perimeter defining a second cross-sectional area, the first cross-sectional area being greater than the second cross-sectional area.

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