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Infusion Device

  • US 20070049877A1
  • 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;

    a cannula having a portion extending from the body, the cannula also having a cannula passageway defined by a cannula passageway wall, the cannula passageway wall having an inwardly-tapered portion that will be above a patient'"'"'s skin when the infusion device is used, the cannula passageway having a cannula passageway end positioned outside the body, the cannula passageway end having a width, a septum positioned within the body passageway, the septum having a septum top surface that includes a septum top surface portion accessible to an injection needle, the septum top surface portion having a septum cross-section positioned perpendicular to an axis that is centered in the body passageway, the septum cross-section having a greatest width that is greater than the width of the cannula passageway end; 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 the axis, 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, and the first cross-sectional area being greater than the second cross-sectional area;

    the infusion device being configured such that (a) a first portion of the infusion device is above the patient'"'"'s skin surface when the infusion device is used and (b) a second portion of the infusion device is beneath the patient'"'"'s skin surface when the device is used, the first portion having a first portion height measured along the axis, the second portion having a second portion height measured along the axis, the second portion height being greater than the fist portion height.

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