Subcutaneous Infusion Device and Method including Tapered Cannula
First Claim
1. A site for a subcutaneous infusion device, the site comprising:
- a base positionable relative to skin of a patient; and
a cannula extending from the base and configured to be introduced into a subcutaneous layer of skin of the patient at a generally ninety-degree angle with respect to the skin using a needle;
wherein the cannula includes first and second ends and defines a bore extending from the first end to the second end, the first end being coupled to the base; and
wherein the cannula includes a tapered wall portion formed between the first and second ends and extending from adjacent to the base towards the second end of the cannula, the tapered wall portion being tapered from a greater wall thickness to a lesser wall thickness as the tapered wall portion extends from the base towards the second end.
3 Assignments
0 Petitions
Accused Products
Abstract
A site for a subcutaneous infusion device includes a base positionable relative to skin of a patient, and a cannula extending from the base and configured to be introduced into a subcutaneous layer of skin of the patient at a generally ninety-degree angle with respect to the skin using a needle. The cannula includes first and second ends and defines a bore extending from the first end to the second end, the first end being coupled to the base. The cannula includes a tapered wall portion formed between the first and second ends and extending from adjacent to the base towards the second end of the cannula, the tapered wall portion being tapered from a greater wall thickness to a lesser wall thickness as the tapered wall portion extends from the base towards the second end.
-
Citations
20 Claims
-
1. A site for a subcutaneous infusion device, the site comprising:
-
a base positionable relative to skin of a patient; and a cannula extending from the base and configured to be introduced into a subcutaneous layer of skin of the patient at a generally ninety-degree angle with respect to the skin using a needle; wherein the cannula includes first and second ends and defines a bore extending from the first end to the second end, the first end being coupled to the base; and wherein the cannula includes a tapered wall portion formed between the first and second ends and extending from adjacent to the base towards the second end of the cannula, the tapered wall portion being tapered from a greater wall thickness to a lesser wall thickness as the tapered wall portion extends from the base towards the second end. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. An infusion device, comprising:
-
a site including a base, a cannula extending from the base, and a seal in fluid communication with the cannula for delivering a substance through the seal and into the cannula, the cannula including a first portion that is coupled to the base, a second portion extending from the first portion, and a third portion this is a free end, wherein the second portion includes a wall portion that is tapered from a greater wall thickness to a lesser wall thickness as the wall portion extends from the first portion to the third portion; and a set including a first member including a needle, and a second member defining an aperture configured to accept the site, wherein the first member is slideable relative to the second member from an unlocked to a locked position, and wherein in the locked position the needle extends into the aperture and through a portion of the seal of the site to deliver the substance to the site. - View Dependent Claims (11, 12, 13)
-
-
14. A method of forming a cannula for a site of an infusion device, the method comprising:
-
forming a longitudinal body including first and second ends and defining a bore extending therethrough; defining a first portion at a first end of the body configured to be coupled to a base of a site; defining a tapered wall portion of the body including a first wall thickness adjacent to the first portion and a second wall thickness adjacent to a third portion of the body including a free end, the first wall thickness being greater than the second wall thickness, and the tapered wall portion being tapered as the tapered wall portion extends from the first wall thickness to the second wall thickness. - View Dependent Claims (15, 16, 17, 18, 19, 20)
-
Specification