Infusion Set for a Fluid Pump

• US 20070049870A1
• Filed: 09/21/2006
• Published: 03/01/2007
• Est. Priority Date: 05/18/2001
• Status: Active Grant

• Current Assignee: Deka Products Limited Partnership
• Original Assignee: Deka Products Limited Partnership
• Inventors: Gray, Larry, Tracey, Brian, Lanigan, Richard, Hamilton, Jared
• Granted Patent: US 9,173,996 B2
• Time in Patent Office: Days
• US Class Current: 604/158
• CPC Class Codes: A61M 2005/14573 with a replaceable reservoir for quick connection/disconnection with a driving system
• CPC Class Codes: A61M 2005/1581 Right-angle needle-type devices
• CPC Class Codes: A61M 2005/1585 Needle inserters
• CPC Class Codes: A61M 2005/1587 suitable for being connected to an infusion line after insertion into a patient
• CPC Class Codes: A61M 25/0612 Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders
• CPC Class Codes: A61M 39/1011 Locking means for securing connection; Additional tamper safeties A61M39/16 takes precedence
• CPC Class Codes: A61M 39/14 for connecting tubes having sealed ends needle sets A61M5/162; having valves closing automatically on disconnection of line A61M39/26
• CPC Class Codes: A61M 5/14 Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
• CPC Class Codes: A61M 5/142 Pressure infusion, e.g. using pumps
• CPC Class Codes: A61M 5/1452 pressurised by means of pistons
• CPC Class Codes: A61M 5/1456 with a replaceable reservoir comprising a piston rod to be moved into the reservoir, e.g. the piston rod is part of the removable reservoir
• CPC Class Codes: A61M 5/158 Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body

Abstract

A medical device for delivery of a fluid to a patient from a line terminating in a tubing needle. The medical device includes a cannula assembly for coupling the fluid into a cannula that is inserted into the patient. The cannula assembly has a first locking element disposed in a fixed position with respect to the cannula. Coupling the line to the cannula assembly is an infusion flap. The infusion flap includes a second locking element for engaging the first locking element of the cannula assembly and a lift tab for disconnecting the infusion flap from the cannula assembly. Coupling of the first and second locking elements requires initial mating of the infusion flap and cannula assembly followed by locking through rotation of the infusion flap with respect to the cannula assembly.

Claims

1. A medical device for delivery of a fluid to a patient from a line terminating in a tubing needle, the medical device comprising:

a cannula assembly for coupling the fluid into a cannula for insertion into the patient, the cannula assembly having a first locking element disposed in a fixed position with respect to the cannula; and

an infusion flap for coupling the line to the cannula assembly, the infusion flap comprising;

a second locking element for engaging the first locking element of the cannula assembly; and

a lift tab for disconnecting the infusion flap from the cannula assembly, wherein coupling of the first and second locking elements requires initial mating of the infusion flap and cannula assembly followed by locking through rotation of the infusion flap with respect to the cannula assembly.

2. The medical device according to claim 1, where the first locking element is a locking lug and the second locking element is a lug receptacle.

3. The medical device according to claim 1, wherein the first locking element is a lug receptacle and the second locking element is a locking lug.

4. The medical device according to claim 1, wherein the cannula assembly includes a septum housing defining a core coupled to the cannula, the septum housing including a first septum positioned within the core at a first position, such that when the infusion flap and the cannula assembly are locked, the tubing needle penetrates the first septum so as to permit fluid communication between the line and the cannula.

5. The medical device according to claim 4, wherein the septum housing includes a second septum positioned within the core at a second position, such that an insertion needle can be introduced through the second septum into the cannula.

6. The medical device according to claim 1, wherein the cannula assembly includes a soft overmolded body.

7. A medical device according to claim 1, the cannula assembly further including:

a flexible tube in fluid communication with the cannula; and

a septum in fluid communication with flexible tube, wherein, when the flexible tube is in a first position, an insertion needle can be introduced through the septum into the cannula, and when the flexible tube is in a second position, a tubing needle inserted through the septum permits fluid communication between the line and the cannula.

8. The device according to claim 1, further comprising an insertion flap, the insertion flap including an insertion needle for inserting into the passageway through the septum, the insertion flap when inserted further extending through the cannula and terminating with a sharp distal end disposed slightly beyond a distal end of the cannula.

9. The device according to claim 1, wherein the insertion flap has an interface for coupling to an auto-insertion device.

10. A medical device for delivery of a fluid to a patient from a line terminating in a tubing needle, the medical device comprising:

a cannula for insertion into the patient;

a flexible tube in fluid communication with the cannula; and

a septum in fluid communication with the flexible tube, wherein when the flexible tube is in a first position, an insertion needle can be introduced through the septum into the cannula, and when the flexible tube is in a second position, a tubing needle inserted through the septum permits fluid communication between the line and the cannula.

11. The device according to claim 10, further comprising:

an infusion flap that includes the tubing needle; and

a cannula assembly that includes the cannula;

wherein when the infusion flap and cannula assembly are mated, the tubing needle passes through the septum permitting fluid communication between the line and the cannula.

12. The device according to claim 11, further comprising a locking mechanism for securing the infusion flap to the cannula assembly.

13. The device according to claim 12, wherein the locking mechanism includes a locking tang on the infusion flap, the locking tang inserted into a tang receptacle on the cannula assembly.

14. The medical device according to claim 12, wherein the septum is disposed in a septum housing, and the locking mechanism includes a first locking element disposed on the septum housing and a second locking element disposed on the infusion flap, wherein coupling of the first and second locking elements requires initial mating of the infusion flap and cannula assembly followed by locking through rotation of the infusion flap with respect to the cannula assembly.

15. The medical device according to claim 14, where the first locking element is a locking lug and the second locking element is a lug receptacle.

16. The medical device according to claim 14, wherein the first locking element is a lug receptacle and the second locking element is a locking lug.

17. The device according to claim 14, wherein the septum housing can be rotated to a mating position that allows the infusion flap and the septum housing to be mated together and the infusion flap rotated with respect to the cannula assembly to lock the infusion flap onto the septum housing, and

wherein the septum housing can then be rotated to a stable position that prevents rotation of the infusion flap.

18. The device according to claim 10, further comprising an insertion flap, the insertion flap including an insertion needle for inserting into the passageway through the septum, the insertion flap when inserted further extending through the cannula and terminating with a sharp distal end disposed slightly beyond a distal end of the cannula.

19. The device according to claim 18, wherein the insertion flap has an interface for coupling to an auto-insertion device.

20. A method for delivering a fluid to a patient from a line terminating in a tubing needle, the method comprising,

inserting an insertion needle through a septum and a cannula, the septum and the cannula having a relative orientation;

inserting the cannula into tissue of a patient;

withdrawing the insertion needle from the cannula and the septum;

inserting the tubing needle through the septum;

varying the relative orientation between the septum and the cannula; and

delivering a fluid through the line and the cannula.

21. A method of providing flow of a fluid from a fluid delivery device to a porous medium, the method comprising:

coupling a hub to the fluid delivery device, the hub permanently affixed to a tube set;

controlling a configuration of the fluid delivery device via the hub; and

coupling the tube set to the porous medium so as to allow fluid to flow from the fluid delivery device to the porous medium.

22. The method according to claim 21, wherein controlling the configuration of the fluid delivery device includes allowing the pump to move from a first configuration to a second configuration.

23. The method according to claim 22, wherein the first configuration of the fluid delivery device is a load position and the second configuration is an operate position.

24. The method according to claim 21, wherein controlling the configuration of the fluid delivery device includes moving a flange on the hub.

25. The method according to claim 21, wherein controlling the configuration of the fluid delivery device includes generating one of a magnetic field and an optical signal.

26. The method according to claim 21, wherein the fluid delivery device is an infusion pump.

27. A hub for retaining a replaceable reservoir in a barrel in a pump housing, the barrel including a longitudinal axis, the hub comprising:

a first end including a first end face disposed transverse to a hub axis, the first end face including a port disposed along the hub axis, the port having tubing affixed thereto for passage of fluid from the reservoir, the first end face having formed therein a grip to facilitate rotation of the hub about the hub axis; and

a second end including a first male element for engaging with a corresponding female element on the reservoir to lock the hub to the reservoir and a second male element for engaging with a corresponding element of the pump housing to retain the reservoir in the barrel when (a) the hub is placed in the pump housing so that the hub axis corresponds with the barrel axis and (b) the hub is rotated.

28. A hub according to claim 27 wherein the grip is a cam.

29. A tubing set for coupling a fluid delivery device into fluid communication with a cannula assembly having a first locking element disposed in a fixed position with respect to a cannula, the tubing set further including:

a length of tubing having a first end and a second end;

a hub for retaining a replaceable reservoir in a barrel in a pump housing in the fluid delivery device, the barrel including a longitudinal axis, the hub comprising;

(1) a first end including a first end face disposed transverse to a hub axis, the first end face including a port disposed along the hub axis, the port having the first end of the length of tubing affixed thereto for passage of fluid from the reservoir, the first end face having formed therein a grip to facilitate rotation of the hub about the hub axis, and

(2) a second end including a first male element for engaging with a corresponding female element on the reservoir to lock the hub to the reservoir and a second male element for engaging with a corresponding element of the pump housing to retain the reservoir in the barrel when (a) the hub is placed in the pump housing so that the hub axis corresponds with the barrel axis, and (b) the hub is rotated; and

an infusion flap coupled to the second end of the length of tubing for connecting to the cannula assembly, the infusion flap including;

a tubing needle,

a second locking element for engaging the first locking element of the cannula assembly, and

a lift tab for disconnecting the infusion flap from the cannula assembly, wherein coupling of the first and second locking elements requires initial mating of the infusion flap and cannula assembly followed by locking through rotation of the infusion flap with respect to the cannula assembly.

30. The tubing set according to claim 29, where the first locking element is a locking lug and the second locking element is a lug receptacle.

31. The tubing set according to claim 29, wherein the first locking element is a lug receptacle and the second locking element is a locking lug.

32. The tubing set according to claim 29, wherein the cannula assembly includes a septum housing defining a core coupled to the cannula, the septum housing including a first septum positioned within the core at a first position, such that when the infusion flap and the cannula assembly are locked, the tubing needle penetrates the first septum so as to permit fluid communication between the line and the cannula.

33. The tubing set according to claim 29, wherein the septum housing includes a second septum positioned within the core at a second position, such that an insertion needle can be introduced through the second septum into the cannula.

34. The tubing set according to claim 29, wherein the cannula assembly includes a soft overmolded body.

35. The tubing set according to claim 29, the cannula assembly further including:

a flexible tube in fluid communication with the cannula; and

a septum in fluid communication with flexible tube, wherein, when the flexible tube is in a first position, an insertion needle can be introduced through the septum into the cannula, and when the flexible tube is in a second position, a tubing needle inserted through the septum permits fluid communication between the line and the cannula.

36. The tubing set according to claim 29, further comprising an insertion flap, the insertion flap including an insertion needle for inserting into the passageway through the septum, the insertion flap when inserted further extending through the cannula and terminating with a sharp distal end disposed slightly beyond a distal end of the cannula.

37. The tubing set according to claim 29, wherein the insertion flap has an interface for coupling to an auto-insertion device.