Medical passing device and method

• US 7,018,384 B2
• Filed: 08/29/2002
• Issued: 03/28/2006
• Est. Priority Date: 08/29/2002
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Skakoon, James Grant
• Primary Examiner(s): Nguyen, Anhtuan T.
• Assistant Examiner(s): LYNCH, ROBERT A
• Application Number:
  US10/230,531
• Publication Number:
  US 20040044348A1
• Time in Patent Office: 1,307 Days
• Field of Search: 600/434, 604/158, 604/161, 604/163, 604/164.01, 604/164.06, 604/170.01, 604/170.02, 604/171, 606/108, 606/129, 606/145, 606/190
• US Class Current: 606/108
• CPC Class Codes: A61B 17/3415 for introducing tubes or catheters, e.g. gastrostomy tubes, drain catheters A61B17/3417 takes precedence; body piercing catheter guide needles A61M25/06
• CPC Class Codes: A61N 1/05 for implantation or insertion into the body, e.g. heart electrode A61N1/06 takes precedence

Abstract

A medical device and method for placing a medical tube, such as a catheter or a shunt, or a medical electrical lead within a patient is disclosed. The medical device of the present invention comprises a passer having a proximal end and a distal end, the passer defining a channel between the proximal end and the distal end. The medical device of the present invention further comprises an obturator having an elongated body, and a first end and a second end, the second end comprising a cradle. In accordance with the invention, the obturator has a removable probe having a first section that fits within the cradle and a second section having a tunneling tip that is exposed outside of the cradle. The obturator is placed into the passer so that the tunneling tip of the probe is exposed outside of the passer at the distal end of the passer. The cradle has dimensions to receive and hold in place a portion of the medical tube or medical lead after the probe is removed from the cradle.

Claims

1. A medical device for placing a medical tube comprising:

a passer having a proximal end and a distal end, the passer defining a channel between the proximal end and the distal end,

an obturator having an elongated body, and a first end and a second end, the second end comprising a cradle, the obturator having a removable probe having a first section that fits within the cradle, and a second section having a tunneling tip that is exposed outside of the cradle,

the tunneling tip exposed outside of the passer at the distal end of the passer when the elongated body of the obturator is inserted into the passer,

the cradle having dimensions to receive and hold in place a portion of the medical tube after the probe is removed from the cradle.

2. The medical device of claim 1, further comprising a handle at the proximal end of the passer.

3. The medical device of claim 1, wherein the medical tube is a catheter.

4. The medical device of claim 1, wherein the medical tube is a shunt.

5. The medical device of claim 1, wherein the tunneling tip is bullet-shaped.

6. The medical device of claim 2, wherein the first end of the obturator is removably attached to the handle.

7. The medical device of claim 1, wherein the cradle comprises at least one member that fits over the first section of the probe

8. The medical device of claim 7, wherein the cradle comprises at least two members that fit over the first section of the probe.

9. The medical device of claim 1, wherein the cradle has a mating rib that corresponds to and fits within a slot defined by the probe, the slot located between the first section and the second section of the probe.

10. The medical device of claim 9, wherein the cradle has a flange that abuts a surface of the probe when the mating rib is placed within the slot.

11. The medical device of claim 9, wherein the cradle has a flange having a first side that abuts a flat surface of the probe when the mating rib is placed within the slot, the flange having a second side that abuts the distal end of the passer when the obturator is inserted into the channel of the passer.

12. The medical device of claim 11, wherein the flange defines an opening to receive a filler section of the probe.

13. The medical device of claim 12, wherein the passer, the flange, and the filler section each have substantially the same outside diameter.

14. The medical device of claim 13, further comprising a sheath that covers a majority of the passer, while leaving the tunneling tip exposed.

15. The medical device of claim 14, wherein the sheath has a tapered end that forms a friction fit with the passer.

16. The medical device of claim 11 wherein the mating rib has an inner surface that abuts the portion of the medical tube when the portion is inserted into the cradle.

17. The medical device of claim 2 wherein the handle is removable from the passer.

18. A medical device for placing a medical lead comprising:

a passer having a proximal end and a distal end, the passer defining a channel between the proximal end and the distal end, an obturator having an elongated body, and a first end and a second end, the second end comprising a cradle, the obturator having a removable probe having a first section that fits within the cradle, and a second section having a tunneling tip that is exposed outside of the cradle, the tunneling tip exposed outside of the passer at the distal end of the passer when the elongated body of the obturator is inserted into the passer, the cradle having dimensions to receive and hold in place a portion of the medical lead after the probe is removed from the cradle.

19. The medical device of claim 18, further comprising a handle at the proximal end of the passer.

20. The medical device of claim 18, wherein the tunneling tip is bullet-shaped.

21. The medical device of claim 19, wherein the first end of the obturator is removably attached to the handle.

22. The medical device of claim 18, wherein the cradle comprises at least one member that fits over the first section of the probe.

23. The medical device of claim 22, wherein the cradle comprises at least two members that fit over the first section of the probe.

24. The medical device of claim 18, wherein the cradle has a mating rib that corresponds to and fits within a slot defined by the probe, the slot located between the first section and the second section of the probe.

25. The medical device of claim 24, wherein the cradle has a flange that abuts a surface of the probe when the mating rib is placed within the slot.

26. The medical device of claim 24, wherein the cradle has a flange having a first side that abuts a flat surface of the probe when the mating rib is placed within the slot, the flange having a second side that abuts the distal end of the passer when the obturator is inserted into the channel of the passer.

27. The medical device of claim 26, wherein the flange defines an opening to receive a filler section of the probe.

28. The medical device of claim 27, wherein the passer, the flange, and the filler section each have substantially the same outside diameter.

29. The medical device of claim 28, further comprising a sheath that covers a majority of the passer, while leaving the tunneling tip exposed.

30. The medical device of claim 29, wherein the sheath has a tapered end that forms a friction fit with the passer.

31. The medical device of claim 26 wherein the mating rib has an inner surface that abuts the portion of the medical lead when the portion is inserted into the cradle.

32. The medical device of claim 19 wherein the handle is removable from the passer.

33. A method for placing a medical tube within a patient, the method comprising:

(a) inserting an obturator into a channel of a passer, the passer having a proximal end and a distal end, the obturator having an elongated body, and a first end and a second end, the second end comprising a cradle, the obturator having a removable probe, the removable probe having a first section that fits within the cradle and a second section having a tunneling tip that is exposed outside the cradle,

(b) making a first incision in the patient,

(c) making a second incision in the patient, the second incision being spaced apart from the first incision,

(d) inserting the distal end of the passer into the first incision,

(e) forming a tunnel within the patient using a tunneling tip by moving the distal end of the passer from the first incision to the second incision by feeding the passer into the patient at the first incision,

(f) removing the probe from the cradle of the obturator after the tunneling tip reaches the second incision,

(g) inserting a portion of the medical tube into the cradle so that the portion of the medical tube is held within the cradle,

(h) moving the distal end of the passer back through the tunnel, along with the cradle of the obturator and the portion of the medical tube held therein, and

(i) removing the portion of the medical tube from the cradle of the obturator after the distal end of the passer reaches the first incision, thereby leaving the medical tube within the tunnel.

34. The method of claim 33, comprising fastening the first end of the obturator to a handle of the passer after step (a) and prior to step (e).

35. The method of claim 34, comprising unfastening the first end of the obturator from the handle of the passer after step (e).

36. The method of claim 35, comprising fastening the first end of the obturator to the handle of the passer after step (g).

37. The method of claim 36, comprising unfastening the first end of the obturator from the handle of the passer after step (h) and prior to step (i).

38. A method for placing a medical lead within a patient, the method comprising:

(a) inserting an obturator into a channel of a passer, the passer having a proximal end and a distal end, the obturator having an elongated body, and a first end and a second end, the second end comprising a cradle, the obturator having a removable probe, the removable probe having a first section that fits within the cradle and a second section having a tunneling tip that is exposed outside the cradle,

(b) making a first incision in the patient,

(c) making a second incision in the patient, the second incision being spaced apart from the first incision,

(d) inserting the distal end of the passer into the first incision,

(e) forming a tunnel within the patient using a tunneling tip by moving the distal end of the passer from the first incision to the second incision by feeding the passer into the patient at the first incision,

(f) removing the probe from the cradle of the obturator after the tunneling tip reaches the second incision,

(g) inserting a portion of the medical lead into the cradle so that the portion of the medical lead is held within the cradle,

(h) moving the distal end of the passer back through the tunnel, along with the cradle of the obturator and the, portion of the medical lead held therein, and

(i) removing the portion of the medical lead from the cradle of the obturator after the distal end of the passer reaches the first incision, thereby leaving the medical lead within the tunnel.

39. The method of claim 38, comprising fastening the first end of the obturator to a handle of the passer after step (a) and prior to step (e).

40. The method of claim 39, comprising unfastening the first end of the obturator from the handle of the passer after step (e).

41. The method of claim 40, comprising fastening the first end of the obturator to the handle of the passer after step (g).

42. The method of claim 41, comprising unfastening the first end of the obturator from the handle of the passer after step (h) and prior to step (i).