Integrated slitter for medical instrument inserter

• US 8,257,312 B2
• Filed: 07/30/2008
• Issued: 09/04/2012
• Est. Priority Date: 07/30/2008
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Duffy, Niall
• Primary Examiner(s): Jackson, Gary
• Assistant Examiner(s): SHIPLEY, AMY R
• Application Number:
  US12/182,725
• Publication Number:
  US 20100030161A1
• Time in Patent Office: 1,497 Days
• Field of Search: 604/164.05, 604/523, 604/524, 623/1.11, 623/1.12, 623/1.23, 606/108, 606/129, 30 901-108
• US Class Current: 604/164.05
• CPC Class Codes: A61M 2025/0675 Introducing-sheath slitters
• CPC Class Codes: A61M 25/0097 characterised by the hub connectors A61M39/10
• CPC Class Codes: A61M 25/0668 splittable, tear apart

Abstract

A catheter system for positioning of an instrument within a body. The catheter system includes a hub defining a lumen therethrough for passage of the instrument and an elongate tubular member defining a lumen therethrough. The lumen of the tubular member is in communication with the lumen of the hub. The system also includes a slitter member that is coupled to the hub. The slitter member is disposed to slit the tubular member. The slitter further includes a moveable member that is moveably coupled to the hub and that is coupled to the tubular member, the moveable member is operable to advance the elongate tubular member toward the slitter member as the moveable member is moved relative to the hub. The slitter member thereby slits the elongate tubular member.

Claims

1. A catheter system for positioning of an instrument within a body, the catheter system comprising:

a hub defining a lumen therethrough for passage of the instrument toward the body;

an elongate tubular member defining a lumen therethrough, the lumen of the elongate tubular member being in direct communication with the lumen of the hub for further passage of the instrument toward the body;

a slitter member that is coupled to the hub, the slitter member disposed to slit the elongate tubular member; and

a moveable member that is moveably coupled to the hub and that is directly coupled to the elongate tubular member, the moveable member operable to advance the elongate tubular member toward the slitter member as the moveable member is moved relative to the hub, thereby slitting the elongate tubular member.

2. The catheter system of claim 1, wherein the moveable member is rotationally coupled to the hub.

3. The catheter system of claim 2, wherein the moveable member is rotationally coupled to the hub generally about a pivot axis that is substantially transverse to a longitudinal axis of the lumen of the hub.

4. The catheter system of claim 3, wherein the moveable member includes a handle portion and a lever portion that spaces the handle portion from the pivot axis to provide a mechanical advantage while advancing the elongate tubular member toward the slitter member.

5. The catheter system of claim 4, further comprising a tube coupling member that couples the moveable member and the elongate tubular member.

6. The catheter system of claim 5, wherein the tube coupling member and the elongate tubular member are monolithic.

7. The catheter system of claim 3, wherein the moveable member is configured to pull the elongate tubular member toward the slitter member as the moveable member rotates about the pivot axis.

8. The catheter system of claim 3, wherein the moveable member includes a rounded back surface upon which the moveable member is rotatably supported on the hub.

9. The catheter system of claim 8, wherein the rounded back surface includes a camming feature that cams the moveable member away from the hub as the moveable member rotates.

10. The catheter system of claim 3, further comprising side members that generally retain the pivot axis in position relative to the hub.

11. The catheter system of claim 1, wherein the moveable member is removably coupled to the hub.

12. The catheter system of claim 11, wherein the moveable member is rotationally coupled to the hub at a rotational coupling, wherein the rotational coupling removably couples the moveable member to the hub.

13. The catheter system of claim 12, wherein the moveable member is configured to pull the elongate tubular member toward the slitter member as the moveable member rotates about the rotational coupling, and wherein the moveable member is further configured to pull the elongate tubular member toward the slitter member after the moveable member is detached from the hub.

14. The catheter system of claim 1, wherein the hub defines a proximal end and a distal end, and wherein the moveable member is removably coupled to the hub generally at a first coupling member and a second coupling member, the first coupling member disposed generally adjacent the proximal end of the hub and the second coupling member disposed generally adjacent the distal end of the hub.

15. The catheter system of claim 1, further comprising a coupling fork that removably couples the moveable member to the hub, the coupling fork including a first arm and a second arm that removably couple to opposing sides of at least one of the hub and the moveable member.

16. The catheter system of claim 15, wherein the coupling fork includes at least one of a grooved portion and a protrusion, and the hub includes the other of the grooved portion and the protrusion, and wherein the grooved portion receives the protrusion to removably couple the coupling fork and the hub.

17. The catheter system of claim 16, wherein the hub further includes a trigger member that is resiliently flexible to resiliently move the other of the grooved portion and the protrusion to thereby detach the grooved portion and the protrusion.

18. The catheter system of claim 1, further comprising a sealing member that removably seals the moveable member to the hub.

19. The catheter system of claim 1, wherein the moveable member includes a flange that conforms generally to an outer surface of the hub.

20. The catheter system of claim 1, further comprising a guide loop that encompasses the elongate tubular member to guide the elongate tubular member as the moveable member is moved relative to the hub.

21. The catheter system of claim 1, wherein the slitter member forms a slit longitudinally in the elongate tubular member, and further comprising a guide fin that extends into the slit to guide the elongate tubular member as the moveable member is moved relative to the hub.

22. The catheter system of claim 1, wherein the hub includes a longitudinal slot that is in communication with the lumen of the hub.

23. The catheter system of claim 1, wherein the moveable member is configured to create a pulling force on elongate tubular member to advance the elongate tubular member toward the slitter member, the hub further including a grip member configured to be gripped to create an opposing force that generally opposes the pulling force.

24. The catheter system of claim 1, wherein the moveable member is rotatably coupled to the hub via a first coupling member, and wherein the hub includes a recess that receives the first coupling member for rotation therein.

25. The catheter system of claim 1, wherein an outer surface of the hub is tapered, and wherein the tubular member advances over the outer surface as the moveable member moves relative to the hub.

26. A catheter system for positioning of an instrument within a body, the catheter system comprising:

a hub defining a lumen therethrough for passage of the instrument toward the body;

an elongate tubular member defining a lumen therethrough, the lumen of the elongate tubular member being in communication with the lumen of the hub for further passage of the instrument toward the body;

a slitter member that is coupled to the hub, the slitter member disposed to slit the elongate tubular member; and

a moveable member that is moveably coupled to the hub and that is coupled to the elongate tubular member, the moveable member operable to advance the elongate tubular member toward the slitter member as the moveable member is moved relative to the hub, thereby slitting the elongate tubular member, wherein the moveable member is rotationally coupled to the hub generally about a pivot axis that is substantially transverse to a longitudinal axis of the lumen of the hub.

27. The catheter system of claim 26, wherein the moveable member includes a handle portion and a lever portion that spaces the handle portion from the pivot axis to provide a mechanical advantage while advancing the elongate tubular member toward the slitter member.

28. The catheter system of claim 27, further comprising a tube coupling member that couples the moveable member and the elongate tubular member.

29. The catheter system of claim 28, wherein the tube coupling member and the elongate tubular member are monolithic.

30. The catheter system of claim 26, wherein the moveable member is configured to pull the elongate tubular member toward the slitter member as the moveable member rotates about the pivot axis.

31. The catheter system of claim 26, wherein the moveable member includes a rounded back surface upon which the moveable member is rotatably supported on the hub.

32. The catheter system of claim 31, wherein the rounded back surface includes a camming feature that cams the moveable member away from the hub as the moveable member rotates.

33. The catheter system of claim 26, further comprising side members that generally retain the pivot axis in position relative to the hub.

34. A catheter system for positioning of an instrument within a body, the catheter system comprising:

a hub defining a lumen therethrough for passage of the instrument toward the body, wherein the hub defines a proximal end and a distal end;

an elongate tubular member defining a lumen therethrough, the lumen of the elongate tubular member being in communication with the lumen of the hub for further passage of the instrument toward the body;

a slitter member that is coupled to the hub, the slitter member disposed to slit the elongate tubular member; and

a moveable member that is moveably coupled to the hub and that is coupled to the elongate tubular member, the moveable member operable to advance the elongate tubular member toward the slitter member as the moveable member is moved relative to the hub, thereby slitting the elongate tubular member, wherein the moveable member is removably coupled to the hub generally at a first coupling member and a second coupling member, the first coupling member disposed generally adjacent the proximal end of the hub and the second coupling member disposed generally adjacent the distal end of the hub.

35. A catheter system for positioning of an instrument within a body, the catheter system comprising:

a hub defining a lumen therethrough for passage of the instrument toward the body;

an elongate tubular member defining a lumen therethrough, the lumen of the elongate tubular member being in communication with the lumen of the hub for further passage of the instrument toward the body;

a slitter member that is coupled to the hub, the slitter member disposed to slit the elongate tubular member;

a moveable member that is moveably coupled to the hub and that is coupled to the elongate tubular member, the moveable member operable to advance the elongate tubular member toward the slitter member as the moveable member is moved relative to the hub, thereby slitting the elongate tubular member; and

a coupling fork that removably couples the moveable member to the hub, the coupling fork including a first arm and a second arm that removably couple to opposing sides of at least one of the hub and the moveable member.

36. The catheter system of claim 35, wherein the coupling fork includes at least one of a grooved portion and a protrusion, and the hub includes the other of the grooved portion and the protrusion, and wherein the grooved portion receives the protrusion to removably couple the coupling fork and the hub.

37. The catheter system of claim 36, wherein the hub further includes a trigger member that is resiliently flexible to resiliently move the other of the grooved portion and the protrusion to thereby detach the grooved portion and the protrusion.