FLUID DELIVERY DEVICE, TRANSCUTANEOUS ACCESS TOOL AND INSERTION MECHANISM FOR USE THEREWITH

• US 20140142508A1
• Filed: 04/01/2013
• Published: 05/22/2014
• 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
• Granted Patent: US 10,130,758 B2
• Time in Patent Office: Days
• US Class Current: 604/151
• 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 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.

2. The fluid delivery device of claim 1 wherein the insertion mechanism is configured to increase an insertion force as the needle/trocar moves in an insertion direction.

3. The fluid delivery device of claim 1 wherein the transcutaneous access tool includes a cannula, and 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 3 wherein the insertion mechanism comprises:

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

a second sliding member configured to move the cannula in the insertion direction;

a torsion spring; and

linkages coupled between the torsion spring and the first sliding member such that energy stored in the torsion spring causes the linkages to move the first sliding member in the insertion direction and the retraction direction in the single, uninterrupted motion.

5. The fluid delivery device of claim 4 wherein the 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.

6. The fluid delivery device of claim 5 wherein the frame includes a cam finger configured to lock the sliding members in the pre-deployment position.

7. The fluid delivery device of claim 6 wherein the cam finger is configured to lock the second sliding member in the post-deployment position.

8. The fluid delivery device of claim 6 wherein the 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.

9. The fluid delivery device of claim 8 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.

10. A fluid delivery device comprising:

a fluid reservoir;

a transcutaneous access tool fluidly coupled to the fluid reservoir, the transcutaneous access tool including at least 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 the needle/trocar with an increasing insertion force as the needle/trocar moves in an insertion direction.

11. The fluid delivery device of claim 10 wherein

the transcutaneous access tool insertion mechanism comprises a spring-biased linkage mechanism to increase the insertion force as the needle/trocar moves in the insertion direction.

12. The fluid delivery device of claim 10 wherein the transcutaneous access tool includes a cannula, and wherein the needle/trocar is located within the cannula such that the cannula remains inserted when the needle/trocar is retracted.

13. The fluid delivery device of claim 12 wherein the insertion mechanism comprises:

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

a second sliding member configured to move the cannula in the insertion direction;

a torsion spring; and

linkages coupled between the torsion spring and the first sliding member such that energy stored in the torsion spring causes the linkages to move the first sliding member in the insertion direction and the retraction direction.

14. The fluid delivery device of claim 13 wherein the 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 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. A transcutaneous access tool insertion mechanism for deploying a transcutaneous access tool including a cannula and a needle or a trocar located inside of the cannula, the insertion mechanism comprising:

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

a second sliding member configured to move the cannula in the insertion direction;

a torsion spring; and

linkages coupled between the torsion spring and the first sliding member such that energy stored in the torsion spring causes the linkages to move the first sliding member in the insertion direction and the retraction direction.

20. The transcutaneous access tool insertion mechanism of claim 19 further comprising:

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.

21. The transcutaneous access tool insertion mechanism of claim 20 wherein the frame includes a cam finger configured to lock the sliding members in the pre-deployment position.

22. The transcutaneous access tool insertion mechanism of claim 21 wherein the cam finger is configured to lock the sliding members in the post-deployment position.

23. The transcutaneous access tool insertion mechanism of claim 21 further comprising:

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.