Fluid delivery device, transcutaneous access tool and insertion mechanism for use therewith

• US 10,130,758 B2
• Filed: 04/01/2013
• Issued: 11/20/2018
• Est. Priority Date: 03/30/2012
• Status: Active Grant

• Current Assignee: Insulet Corporation
• Original Assignee: Insulet Corporation
• Inventors: DiIanni, Steven, McLaughlin, Ian, O'Connor, Jason Brian, Campbell, Robert, Schmid, Kevin
• Primary Examiner(s): Sirmons, Kevin C
• Assistant Examiner(s): Legette-Thompson, Tiffany
• Application Number:
  US13/854,445
• Publication Number:
  US 20140142508A1
• Time in Patent Office: 2,059 Days
• Field of Search: 604131, 604133, 604134, 604136, 604157-159, 60416401, 60416412, 604264, 604272, 6048901, 604151, 604 66, 604504
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/14865 invasive, e.g. introduced into the body by a catheter or needle or using implanted sensors
• CPC Class Codes: A61M 2005/1403 Flushing or purging
• CPC Class Codes: A61M 2005/14252 with needle insertion means
• CPC Class Codes: A61M 2005/14506 mechanically driven, e.g. spring or clockwork
• CPC Class Codes: A61M 2230/201 Glucose concentration
• CPC Class Codes: A61M 5/14244 adapted to be carried by the patient, e.g. portable on the body
• CPC Class Codes: A61M 5/14248 of the skin patch type
• CPC Class Codes: A61M 5/1452 pressurised by means of pistons
• CPC Class Codes: A61M 5/14566 with a replaceable reservoir for receiving a piston rod of the pump
• CPC Class Codes: A61M 5/158 Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
• CPC Class Codes: A61M 5/1723 using feedback of body parameters, e.g. blood-sugar, pressure measurement of body parameters A61B5/00
• CPC Class Codes: A61M 5/3291 Shafts with additional lateral openings
• CPC Class Codes: F04B 9/02 the means being mechanical
• CPC Class Codes: F04C 2270/041 Controlled or regulated

Abstract

A fluid delivery device comprising a fluid reservoir; a transcutaneous access tool fluidly coupled to the fluid reservoir, the transcutaneous access tool including a needle or a trocar; and a transcutaneous access tool insertion mechanism for deploying the transcutaneous access tool, wherein the insertion mechanism is configured to insert and retract the needle/trocar in a single, uninterrupted motion.

Claims

1. A fluid delivery device comprising:

a fluid reservoir;

a transcutaneous access tool fluidly coupled to the fluid reservoir, the transcutaneous access tool including a cannula, and a needle or a trocar located inside the cannula;

a transcutaneous access tool insertion mechanism configured to deploy the transcutaneous access tool;

wherein the transcutaneous access tool insertion mechanism is configured to increase an insertion force as the needle/trocar moves in an insertion direction, the transcutaneous access tool insertion mechanism comprising

a first sliding member coupled with the needle/trocar and operable to move the needle/trocar in an insertion direction and in a retraction direction;

a second sliding member coupled with the cannula and operable to move the cannula in the insertion direction;

a torsion spring having a longitudinal axis;

first and second linkages coupled between the torsion spring and the first sliding member such that, upon deployment, energy stored in the torsion spring causes the first and second linkages to cooperate to move the first sliding member in the insertion direction and the retraction direction; and

wherein, upon deployment, the first linkage is arranged to rotate about the longitudinal axis of the torsion spring, and the first linkage and second linkage are arranged to rotate relative to each other about a moving pivot to move the first sliding member in the insertion direction and the retraction direction.

2. The fluid delivery device of claim 1 wherein the transcutaneous access tool insertion mechanism is configured to provide a maximum insertion force as the needle/trocar reaches a fully extended position.

3. The fluid delivery device of claim 1 wherein the needle/trocar is located within the cannula such that the cannula remains inserted when the needle/trocar is retracted.

4. The fluid delivery device of claim 1 wherein the transcutaneous access tool insertion mechanism is configured to insert and retract the needle/trocar with energy stored in a single spring.

5. The fluid delivery device of claim 1 wherein the transcutaneous access tool insertion mechanism is configured to insert and retract the needle/trocar in a rotational motion.

6. The fluid delivery device of claim 5 wherein the rotational motion of the transcutaneous access tool insertion mechanism is mechanically transformed to linear motion of the needle/trocar in an insertion direction and a retraction direction.

7. The fluid delivery device of claim 1 wherein the transcutaneous access tool insertion mechanism is configured to insert and retract the needle/trocar in a rotational motion.

8. The fluid delivery device of claim 7 wherein the rotational motion of the transcutaneous access tool insertion mechanism is mechanically transformed to linear motion of the needle/trocar in an insertion direction and a retraction direction.

9. The fluid delivery device of claim 1 wherein the transcutaneous access tool insertion mechanism further comprises:

a frame slidably receiving the sliding members and configured to lock the sliding members in a pre-deployment position and to lock the second sliding member in a post-deployment position.

10. The fluid delivery device of claim 9 wherein the frame includes a cam finger configured to lock the sliding members in the pre-deployment position.

11. The fluid delivery device of claim 10 wherein the cam finger is configured to lock the second sliding member in the post-deployment position.

12. The fluid delivery device of claim 10 wherein the transcutaneous access tool insertion mechanism further comprises:

a release bar configured to hold the cam finger when the cam finger locks the sliding members in the pre-deployment position and configured to release the cam finger to allow the sliding members to move in the insertion direction.

13. The fluid delivery device of claim 12 further comprising a drive mechanism for driving fluid from the reservoir, wherein the drive mechanism engages the release bar and triggers movement of the release bar to release the cam finger.

14. The fluid delivery device of claim 1 wherein the transcutaneous access tool insertion mechanism further comprises:

a frame slidably receiving the sliding members and configured to lock the sliding members in a pre-deployment position and to lock the second sliding member in a post-deployment position.

15. The fluid delivery device of claim 14 wherein the frame includes a cam finger configured to lock the sliding members in the pre-deployment position.

16. The fluid delivery device of claim 15 wherein the cam finger is configured to lock the second sliding member in the post-deployment position.

17. The fluid delivery device of claim 15 wherein the transcutaneous access tool insertion mechanism further comprises:

a release bar configured to hold the cam finger when the cam finger locks the sliding members in the pre-deployment position and configured to release the cam finger to allow the sliding members to move in the insertion direction.

18. The fluid delivery device of claim 17 further comprising a drive mechanism for driving fluid from the reservoir, wherein the drive mechanism engages the release bar and triggers movement of the release bar to release the cam finger.

19. The fluid delivery device of claim 1 wherein the transcutaneous access tool insertion mechanism is configured to insert and retract the needle/trocar in a single, uninterrupted motion.

20. The fluid delivery device of claim 19 wherein the single, uninterrupted motion is a rotational motion.

21. The fluid delivery device of claim 20 wherein the rotational motion of the transcutaneous access tool insertion mechanism is mechanically transformed to linear motion of the needle/trocar in an insertion direction and a retraction direction.

22. The fluid delivery device of claim 1 wherein the transcutaneous access tool insertion mechanism is configured to insert and retract the needle/trocar in a single, uninterrupted motion.

23. The fluid delivery device of claim 22 wherein the single, uninterrupted motion is a rotational motion.

24. The fluid delivery device of claim 23 wherein the rotational motion of the transcutaneous access tool insertion mechanism is mechanically transformed to linear motion of the needle/trocar in an insertion direction and a retraction direction.

25. A fluid delivery device comprising:

a fluid reservoir;

a transcutaneous access tool fluidly coupled to the fluid reservoir, the transcutaneous access tool including a cannula, and a needle or a trocar located inside the cannula;

a transcutaneous access tool insertion mechanism configured to deploy the transcutaneous access tool;

wherein the transcutaneous access tool insertion mechanism comprises

a first sliding member coupled with the needle/trocar and operable to move the needle/trocar in an insertion direction and in a retraction direction;

a second sliding member coupled with the cannula and operable to move the cannula in the insertion direction;

a torsion spring having a longitudinal axis;

first and second linkages coupled between the torsion spring and the first sliding member such that, upon deployment, energy stored in the torsion spring causes the first and second linkages to cooperate to move the first sliding member in the insertion direction and the retraction direction; and

wherein, upon deployment, the first linkage is arranged to rotate about the longitudinal axis of the torsion spring, and the first linkage and second linkage are arranged to rotate relative to each other about a moving pivot to move the first sliding member in the insertion direction and the retraction direction.

26. The fluid delivery device of claim 25 wherein the transcutaneous access tool insertion mechanism is configured to provide a maximum insertion force as the needle/trocar reaches a fully extended position.

27. The fluid delivery device of claim 25 wherein the needle/trocar is located within the cannula such that the cannula remains inserted when the needle/trocar is retracted.

28. The fluid delivery device of claim 25 wherein the transcutaneous access tool insertion mechanism is configured to increase an insertion force as the needle/trocar moves in an insertion direction.

29. The fluid delivery device of claim 25 wherein the transcutaneous access tool insertion mechanism is configured to insert and retract the needle/trocar with energy stored in a single spring.

30. The fluid delivery device of claim 25 wherein the first linkage is arranged to rotate in a first direction about the longitudinal axis of the torsion spring, and the second linkage is arranged to rotate in a second direction about the moving pivot, wherein the second direction is counter to the first direction.

31. The fluid delivery device of claim 25 wherein the first linkage is arranged to rotate clockwise about the longitudinal axis of the torsion spring, and the second linkage is arranged to rotate counter-clockwise about the moving pivot.