MEDICATION INFUSION SET
First Claim
1. A device for inserting a cannula for subcutaneous administration of fluid into a patient, comprising:
- a cannula housing defining a fluid passageway along a longitudinal axis thereof, the cannula housing including first and second guide rails and a cannula, said cannula being in fluid communication with the passageway, wherein, along substantially the entire length thereof, each of said guide rails has an outer longitudinal surface with an arcuate profile; and
an introducer configured to be detachably connected to the cannula housing, the introducer comprising separate first and second guide arms, each said guide arm being configured to mate with a respective one of the guide rails, and a longitudinally-extending needle that is parallel to said guide arms and has a distal tip that extends beyond respective distal ends of said first and second guide arms,wherein the introducer is symmetrical about its longitudinal axis such that it is reversible, wherein each of the separate first and second guide arms has opposing inner and outer longitudinal sides, wherein, for each guide arm, the outer longitudinal side is flat along substantially the entire length thereof and the inner longitudinal side has an arcuate profile along substantially the entire length thereof, wherein the inner side of the first guide arm faces the inner side of the second guide arm, and wherein the cannula has a distal end for placement into the patient'"'"'s skin, and, when the introducer is connected to the cannula housing, the needle'"'"'s distal tip extends beyond the cannula'"'"'s distal end.
1 Assignment
0 Petitions
Accused Products
Abstract
An infusion set is provided for use in delivering fluid through a cannula, which is housed on a cannula housing, to a selected subcutaneous infusion site on a patient. The fluid is generally a medication, e.g., insulin. The cannula is in fluid communication with a fluid passageway surrounded by a projection on the cannula housing that includes one or more rail-like extensions acting as guides. A connector connects the cannula housing to a fluid delivery system, e.g., an infusion pump. The connector includes a needle, one or more guide arms that slide over the rail-like extensions to guide the needle into the self-sealing septum, and one or more locking arms, with barbs at the end, to connect with corresponding recesses in the cannula housing. An introducer having one or more similar guide arms and locking arms, and a longer needle, may be used to insert the cannula into the patient.
-
Citations
25 Claims
-
1. A device for inserting a cannula for subcutaneous administration of fluid into a patient, comprising:
-
a cannula housing defining a fluid passageway along a longitudinal axis thereof, the cannula housing including first and second guide rails and a cannula, said cannula being in fluid communication with the passageway, wherein, along substantially the entire length thereof, each of said guide rails has an outer longitudinal surface with an arcuate profile; and an introducer configured to be detachably connected to the cannula housing, the introducer comprising separate first and second guide arms, each said guide arm being configured to mate with a respective one of the guide rails, and a longitudinally-extending needle that is parallel to said guide arms and has a distal tip that extends beyond respective distal ends of said first and second guide arms, wherein the introducer is symmetrical about its longitudinal axis such that it is reversible, wherein each of the separate first and second guide arms has opposing inner and outer longitudinal sides, wherein, for each guide arm, the outer longitudinal side is flat along substantially the entire length thereof and the inner longitudinal side has an arcuate profile along substantially the entire length thereof, wherein the inner side of the first guide arm faces the inner side of the second guide arm, and wherein the cannula has a distal end for placement into the patient'"'"'s skin, and, when the introducer is connected to the cannula housing, the needle'"'"'s distal tip extends beyond the cannula'"'"'s distal end. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A device for inserting a cannula for subcutaneous administration of fluid into a patient, comprising:
-
a cannula housing defining a fluid passageway along a longitudinal axis thereof, the cannula housing including first and second guide rails and a cannula, said cannula being in fluid communication with the passageway, wherein, along substantially the entire length thereof, each of said guide rails has an outer longitudinal surface with an arcuate profile; and an introducer configured to be detachably connected to the cannula housing, the introducer comprising separate first and second guide arms, each said guide arm being configured to mate with a respective one of the guide rails, a longitudinally-extending needle that is parallel to said guide arms and has a distal tip that extends beyond respective distal ends of said first and second guide arms, and a plurality of locking arms, each said locking arm having a barb associated therewith, wherein each of the separate first and second guide arms has opposing inner and outer longitudinal sides, wherein, for each guide arm, the outer longitudinal side is flat along substantially the entire length thereof and the inner longitudinal side has an arcuate profile along substantially the entire length thereof, wherein the inner side of the first guide arm faces the inner side of the second guide arm, and wherein the cannula housing further defines a plurality of recesses therein, each said recess being configured to receive a respective one of said barbs so as to detachably connect the introducer to the cannula housing. - View Dependent Claims (10, 11, 12, 13, 14, 15)
-
-
16. A method of inserting a cannula for subcutaneous administration of fluid into a patient, comprising:
-
positioning a cannula housing at an insertion site on a patient, wherein the cannula housing defines a fluid passageway along a longitudinal axis thereof, wherein the cannula housing includes first and second guide rails and a cannula, said cannula being in fluid communication with the passageway, and wherein, along substantially the entire length thereof, each of said guide rails has an outer longitudinal surface with an arcuate profile; connecting an introducer to the cannula housing, wherein the introducer includes separate first and second guide arms, each said guide arm being configured to mate with a respective one of the guide rails, and a longitudinally-extending needle that is parallel to said guide arms and has a distal tip that extends beyond respective distal ends of said first and second guide arms, and wherein the cannula has a distal end for placement into the patient'"'"'s skin, and, when the introducer is connected to the cannula housing, the needle'"'"'s distal tip extends beyond the cannula'"'"'s distal end; inserting the needle and the cannula into the insertion site; and disconnecting the introducer from the cannula housing, whereby the needle is removed from the cannula. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25)
-
Specification