Device and method for insertion of a cannula of an infusion device

1. A device for inserting a subcutaneous infusion device into skin of a patient, comprising:

a housing;

a needle hub including a needle;

a sleeve;

a cap coupled to the housing, the cap defining a bead, and the cap defining a boss extending from a closed end of the cap, the boss defining a central cavity sized to receive the needle and associated cannula of the infusion device; and

a retention member including a tab extending outward radially from the sleeve and configured to engage the bead defined by the cap to limit movement of the sleeve relative to the housing while the cap is coupled to the housing so that the sleeve is prevented from moving to a trigger state;

wherein a free end of the boss of the cap engages a bottom surface of the infusion device to limit movement of the infusion device relative to the needle while the cap is coupled to the housing; and

wherein, upon removal of the cap, the needle hub is movable relative to the sleeve to introduce the needle of the needle hub and associated cannula of an infusion device into a subcutaneous layer of skin.

2. The device of claim 1 , wherein the retention member comprises four tabs and the cap defines four corresponding beads.

3. The device of claim 1 , wherein the bead is defined on an internal circumference of the cap.

4. The device of claim 3 , wherein the bead is pitched.

5. The device of claim 1 , further comprising a spring engaging the needle hub, wherein, upon the needle and associated cannula of the infusion device being fully inserted into the subcutaneous layer of skin, the needle hub is slideable relative to the sleeve, and the needle hub including the needle are moveable by the spring to a retracted state, leaving the cannula of the infusion device positioned on the skin of the patient.

6. A device for inserting a subcutaneous infusion device into skin of a patient, comprising:

a housing;

a needle hub including a needle with a cannula of an infusion device coupled thereto;

a sleeve defining a tab extending outward radially therefrom; and

a cap coupled to the housing, the cap defining a boss extending from a closed end of the cap, the boss defining a central cavity sized to receive the needle and associated cannula of the infusion device, and the cap defining a bead on an internal surface of the cap;

wherein a free end of the boss engages a bottom surface of the infusion device to limit movement of the infusion device relative to the needle;

wherein the tab engages the bead defined by the cap to limit movement of the sleeve relative to the housing so that the sleeve is prevented from moving to a trigger state; and

wherein, upon removal of the cap, the needle hub is movable relative to the sleeve to introduce the needle of the needle hub and associated cannula of an infusion device into a subcutaneous layer of skin.

7. The device of claim 6 , wherein the bead is pitched.

8. The device of claim 6 , wherein the sleeve includes four tabs and the cap defines four corresponding beads.

9. A device for inserting a subcutaneous infusion device into skin of a patient, comprising:

a housing;

a needle hub including a needle, the needle having a cannula of an infusion device coupled thereto;

a sleeve;

a spring engaging the needle hub;

a cap coupled to the housing;

a boss coupled to the cap and configured to engage a bottom surface the infusion device to fix the infusion device relative to the needle prior to decoupling of the cap from the housing, wherein the boss is cylindrical and centrally located with respect to a closed end of the cap, and wherein the boss defines a central cavity sized to receive the needle and associated cannula of the infusion device; and

a tab extending outward radially from the sleeve, wherein the tab engages a bead defined by the cap to limit movement of the sleeve relative to the housing while the cap is coupled to the housing so that the sleeve is prevented from moving to a trigger state, wherein the bead is defined on an internal circumference of the cap;

wherein, upon removal of the cap, the needle hub is movable relative to the sleeve to introduce the needle of the needle hub and associated cannula of the infusion device into a subcutaneous layer of skin, and wherein, upon the needle and associated cannula of the infusion device being fully inserted into the subcutaneous layer of skin, the needle hub is slideable relative to the sleeve, and the needle hub including the needle are moveable by the spring to a retracted state, leaving the cannula of the infusion device positioned on the skin of the patient.

10. The device of claim 9 , wherein the bead is pitched.

11. An apparatus, comprising:

an infusion device including a cannula; and

a device for inserting the infusion device into skin of a patient, including:

a housing;

a needle hub including a needle with the cannula of the infusion device coupled thereto;

a sleeve defining a tab extending outward radially therefrom; and

a cap coupled to the housing, the cap defining a boss extending from a closed end of the cap, the boss defining a central cavity sized to receive the needle and associated cannula of the infusion device, and the cap defining a bead on an internal surface of the cap;

wherein a free end of the boss engages a bottom surface of the infusion device to limit movement of the infusion device relative to the needle while the cap is coupled to the housing; and

wherein the tab engages the bead defined by the cap to limit movement of the sleeve relative to the housing while the cap is coupled to the housing so that the sleeve is prevented from moving to a trigger state.

12. The apparatus of claim 11 , wherein the sleeve includes four tabs and the cap defines four corresponding beads.