RAPID EXCHANGE CATHETERS AND EMBOLIC PROTECTION DEVICES

• US 20110230861A1
• Filed: 05/31/2011
• Published: 09/22/2011
• Est. Priority Date: 02/18/2005
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Tyco Healthcare Group LP (Medtronic Plc)
• Inventors: von Lehe, Cathleen, Sirivong, Sengkham
• Granted Patent: US 9,456,889 B2
• Time in Patent Office: Days
• US Class Current: 604/528
• CPC Class Codes: A61B 17/12022 Occluding by internal devices, e.g. balloons or releasable wires plugging an opening in the wall of an organ A61B17/0057; occluders for the cervical canal A61F6/146; vas deferens occluders A61F6/20
• CPC Class Codes: A61B 17/12109 in a blood vessel
• CPC Class Codes: A61B 17/12122 within the heart for closing a cardiac septal defect A61B17/0057
• CPC Class Codes: A61B 17/12172 having a pre-set deployed three-dimensional shape methods of manufacturing A61B2017/00526
• CPC Class Codes: A61B 2017/1205 Introduction devices
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• CPC Class Codes: A61F 2/013 Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting
• CPC Class Codes: A61F 2002/015 Stop means therefor
• CPC Class Codes: A61F 2002/016 made from wire-like elements
• CPC Class Codes: A61F 2002/018 made from tubes or sheets of material, e.g. by etching or laser-cutting
• CPC Class Codes: A61F 2230/0008 elliptical or oval
• CPC Class Codes: A61F 2230/0067 conical
• CPC Class Codes: A61M 2025/0183 Rapid exchange or monorail catheters
• CPC Class Codes: A61M 25/0023 by the form of the lumen, e.g. cross-section, variable diameter

Abstract

A catheter comprising a housing portion defining an interior cavity and the housing portion comprising a housing member having an interior space dimensioned for housing an indwelling medical device. The elongated member comprises a lumen extending at least from an exit port to a distal port, the housing member is disposed within the lumen, and the lumen is dimensioned in the housing portion to receive a guidewire outside of the interior space of the housing member. A medical device for filtering emboli from blood flowing in a blood vessel of patient comprising an elongate support member and an elongate side branch member connected to the elongate support member. The filter element is attached to the elongate side branch member by a proximal filter element slider, and the elongate side branch member is adapted to maintain the filter element centered in the vessel.

Claims

1. A catheter comprising:

an elongated member configured to be advanced along a vascular path of a patient, the elongated member having a proximal portion, a distal portion, a proximal end, a distal end, a housing portion adjacent to and proximal of the distal portion, and a sidewall exit port proximal of the housing portion, the sidewall exit port being dimensioned to receive a guidewire;

the distal end comprising a distal port;

the distal portion comprising an indwelling medical device delivery structure;

the housing portion defining an interior cavity and the housing portion comprising a housing member contained within the interior cavity, the housing member having an interior space dimensioned for housing an indwelling medical device, and the housing member having a proximal end that is distal of the proximal end of the elongated member; and

the elongated member comprising a lumen extending at least from the exit port to the distal port, the housing member being disposed within the lumen and the lumen encompassing the interior cavity of the housing portion, and the lumen being dimensioned in the housing portion to receive a guidewire outside of the interior space of the housing member.

2. A catheter of claim 1, wherein the housing member is secured at a fixed location within the housing portion.

3. A catheter of claim 1, wherein the housing portion comprises distal and proximal housing sections and the housing member can move axially within the housing portion.

4. A catheter of claim 3, wherein the housing member can move axially between the proximal and distal sections of the housing portion.

5. A catheter of claim 1, wherein the housing portion and distal portion have outer diameters and the outer diameter of the housing portion is larger than the outer diameter of the distal portion.

6. A catheter of claim 1, wherein the housing portion and distal portion have inner diameters and the inner diameter of the housing portion is larger than the inner diameter of the distal portion.

7. A catheter of claim 5, wherein the housing portion and distal portion have inner diameters and the inner diameter of the housing portion is larger than the inner diameter of the distal portion.

8. A catheter of claim 3, wherein the proximal housing section comprises a stop member.

9. A catheter of claim 8, wherein the stop member is tubular.

10. A catheter of claim 9, wherein the stop member comprises one or more sidewall slots that allow additional pathways for the guidewire.

11. A catheter of claim 1, wherein the elongated member has an inner wall defining the lumen and the housing member is adjacent to the inner wall.

12. A catheter of claim 2, wherein the elongated member has an inner wall defining the lumen and the housing member is adjacent to the inner wall.

13. A catheter of claim 3, wherein the elongated member has an inner wall defining the lumen and the housing member is adjacent to the inner wall.

14. A catheter of claim 1, wherein the housing member is centered within the lumen.

15. A catheter of claim 2, wherein the housing member is centered within the lumen.

16. A catheter of claim 3, wherein the housing member is centered within the lumen.

17. A catheter of claim 2, wherein the housing portion comprises distal and proximal housing sections and the proximal housing section comprises the housing member, and the housing member is tubular.

18. A catheter of claim 17, wherein the housing member comprises one or more sidewall slots that allow additional pathways for a guidewire.

19. A catheter of claim 2, wherein the elongated member has an inner wall defining the lumen, and the housing member is suspended within the housing portion by a grommet that is affixed to the inner wall.

20. A catheter of claim 19, wherein the grommet has an outer periphery, and the entire outer periphery of the grommet contacts the inner wall.

21. A catheter of claim 19, wherein the housing member is centered within the lumen.

22. A catheter of claim 19, wherein the grommet comprises one or more openings which allow passage of the guidewire.

23. A catheter of claim 22, wherein the grommet comprises a single opening that allows passage of the guidewire.

24. A catheter of claim 22, wherein the grommet comprises two openings that allow passage of the guidewire.

25. A catheter of claim 24, wherein the housing member is centered within the lumen.

26. A catheter of claim 1, wherein the housing member is tubular.

27. A catheter of claim 2, wherein the housing member is tubular.

28. A catheter of claim 3, wherein the housing member is tubular.

29. A catheter of claim 1, wherein the catheter comprises a ramp in the lumen that causes a guidewire to be directed out the exit port.

30. A catheter of claim 1, wherein the proximal portion comprises an indwelling medical device retrieval structure.

31. A catheter of claim 1, wherein the proximal portion comprises a second sidewall port.

32. A catheter of claim 1, wherein at least a portion of the housing portion is transparent.

33. A catheter of claim 1, wherein the proximal end comprises a rolled tip.

34. A catheter of claim 1, wherein the proximal end comprises a shapeable tip.

35. A catheter of claim 1, wherein the distal port has a diameter and the distal end comprises a removable delivery tip transition component that reduces the diameter of the distal port.

36. A catheter of claim 35, wherein the removable delivery tip transition component comprises a tearable spirally wrapped material and a string that extends along the side of the delivery catheter.

37. An assembly comprising a guidewire and a catheter of claim 1.

38. An assembly comprising a medical device and a catheter of claim 1.

39. An assembly of claim 38, further comprising a guidewire.

40. An assembly of claim 38, wherein the medical device is selected from an embolic protection device, balloon catheter, stent delivery catheter, atrial appendage occlusion device, mitral valve remodeling device, or septal defect closure device.

41. An assembly of claim 38, wherein the medical device is an embolic protection device.

42. An assembly of claim 41, wherein the embolic protection device is a filter.

43. An assembly of claim 41, wherein the embolic protection device is an occlusive device.

44. An assembly of claim 38, wherein the medical device is adapted to be delivered and retrieved by the elongated member.

45. An assembly comprising a catheter of claim 1 and a removable packaging sheath having an end adapted to accommodate a fluid filled syringe for flushing the catheter.

46. A method for positioning a medical device within a patient'"'"'s blood vessel, the method comprising:

providing a catheter of claim 1;

placing the medical device within the catheter;

advancing the catheter to a target site within the patient'"'"'s blood vessel; and

advancing the medical device out of the catheter to the target site within the patient'"'"'s blood vessel.

47. A method for positioning a catheter within a patient'"'"'s blood vessel, the method comprising:

providing a catheter of claim 1;

providing a guidewire having a proximal end and a distal end;

advancing the guidewire to a target site within the patient'"'"'s blood vessel; and

advancing the catheter over the guidewire by inserting the guidewire through the lumen between the distal port and the sidewall exit port.

48. The method of claim 47, wherein an embolic protection device is loaded into the catheter prior to advancing the catheter over the guidewire.

49. The method of claim 48, wherein the catheter is advanced over the guidewire to a treatment site, the guidewire is removed, and the embolic protection device is advanced out of the catheter.

50. A distal tip of a host wire of an embolic protection device comprising:

a wire comprising a first constant diameter region having a first diameter, a second constant diameter region having a second diameter, and a third constant diameter region having a third diameter, the second constant diameter region having a smaller diameter than the first constant diameter region, and the third constant diameter region having a smaller diameter than the second constant diameter region;

a first tapering transition region between the first constant diameter region and the second constant diameter region; and

a second tapering transition region between the second constant diameter region and the third constant diameter region.