Patent ID: 7704228
Filing Date: 2010-04-27
Classification: A61M

Abstract:
1. An infusion device comprising: a body having a body passageway, a bottom, and an outer perimeter; an adhesive laminate member attached to the bottom; 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 having a greatest cannula passageway width, the cannula passageway wall having an inwardly-tapered portion that will be above the patient's skin when the infusion device is mounted on the patient and the adhesive laminate member is in contact with the patient's skin; a self-sealing septum positioned within the body passageway, the self-sealing septum having a septum top surface that includes a septum top surface portion that is accessible to an injection needle, the septum top surface portion being defined by a septum top surface portion perimeter having a greatest width that is greater than the greatest cannula passageway width; 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.