Catheter

• US 20090287135A1
• Filed: 02/21/2006
• Published: 11/19/2009
• Est. Priority Date: 02/22/2005
• Status: Active Grant

• Current Assignee: Kaneka Corporation
• Original Assignee: Kaneka Corporation
• Inventors: Michishita, Ichiro, Nishide, Takuji
• Granted Patent: US 8,105,259 B2
• Time in Patent Office: Days
• US Class Current: 604/6.160
• CPC Class Codes: A61M 2025/0031 characterized by lumina for withdrawing or delivering, i.e. used for extracorporeal circuit treatment
• CPC Class Codes: A61M 2025/0037 characterized by lumina being arranged side-by-side
• CPC Class Codes: A61M 2025/0039 characterized by lumina being arranged coaxially
• CPC Class Codes: A61M 2027/004 with at least a part of the circuit outside the body
• CPC Class Codes: A61M 25/0029 characterized by features relating to least one lumen located at the middle part of the catheter, e.g. slots, flaps, valves, cuffs, apertures, notches, grooves or rapid exchange ports catheter shaft surface irregularities A61M2025/006
• CPC Class Codes: A61M 25/0041 pre-formed, e.g. specially adapted to fit with the anatomy of body channels urethral catheters A61F2/04
• CPC Class Codes: A61M 25/007 Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked

Abstract

The present invention provides a catheter for extraction that can efficiently extract blood flowing in coronary sinus from coronary artery through coronary vein and has the same operability as catheters used in conventional PCI. The present invention also provides a catheter for extracorporeal circulation that can lessen an introduction number of devices for blood access as little as possible and reduce further the burden to a patient, in addition to the same operability as the catheters used in the conventional PCI. The catheter for extraction is equipped with blood extracting lumen in an inside and equipped with a hub at a proximal end portion, and when a minimum sectional area to a circumferential direction of the blood extracting lumen is referred to as S1 and immersion side length is referred to as L1, an equivalent diameter D1 satisfies the formula defined by D1=(4×S1)/L1 and the equivalent diameter D1 is at 1.80 mm. The catheter for extracorporeal circulation also has blood extracting lumen extending from the distal end to the proximal end and blood return lumen extending from the proximal end of the catheter to a fixed length distal end.

Claims

1. A catheter for extraction being arranged in the biolumen, having distal end and proximal end and for externally extracting the blood from the distal end, wherein the catheter for extraction is equipped with blood extracting lumen in the inside and equipped with a hub at the proximal end portion, and when the minimum sectional area to the circumferential direction of the blood extracting lumen is referred to as S1 and immersion side length is referred to as L1, an equivalent diameter D1 satisfies the formula defined by D1=(4×

S1)/L1 and the equivalent diameter D1 is at least 1.80 mm.

2. The catheter for extraction of claim 1, wherein side holes are provided at the distal end side of the catheter for extraction.

3. The catheter for extraction of claim 2, wherein side holes are at least 2 and at most 10.

4. The catheter for extraction of claim 3, wherein the number of the side hole existing on the same circumference is 1.

5. The catheter for extraction of claim 3, wherein the side holes are spirally arranged.

6. The catheter for extraction of claim 5, wherein when the sectional area of the side hole is referred to as S3 and the immersion side length is referred to as L3, the equivalent diameter D3 satisfies the formula defined by D3=(4×

S3)/L3 and the equivalent diameter D3 is at least 1.80 mm.

7. The catheter for extraction of claim 6, wherein the catheter for extraction is composed of the combination of a braiding tubing complexing metal and a resin and a tube made of a resin.

8. The catheter for extraction of claim 7, wherein the distal end side is composed of a tube made of a resin.

9. The catheter for extraction of claim 8, wherein the resin comprises an elastomer with a shore hardness of at least 25 D and at most 75 D, or the blend of the elastomers.

10. The catheter for extraction of claim 9, wherein the elastomer is a polyamide elastomer.

11. The catheter for extraction of claim 9, wherein a substance impermeable for X-ray is mixed with the resin.

12. The catheter for extraction of claim 11, wherein hydrophilic coating is carried out on the outer face of the catheter for extraction.

13. The catheter for extraction of claim 12, having a subcatheter detachably installed in the blood extracting lumen.

14. The catheter for extraction of claim 13, wherein the subcatheter is composed of a flexible tube member and preferably equipped with a hub at the rear end portion.

15. The catheter for extraction of claim 14, wherein the tube member is composed of a tube made of a resin.

16. The catheter for extraction of claim 15, wherein the resin is either of a high density polyethylene and a low density polyethylene.

17. The catheter for extraction of claim 15, wherein the resin is either selected from a group comprising a polytetrafluoroethylene (PTFE), a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), a tetrafluoroethylene-hexafluoropropylene copolymer (FEP), a tetrafluoroethylene-ethylene copolymer (ETFE), a polyvinylidene fluoride (PVDF) and a polychlorotrifluoroethylene (PCTFE).

18. The catheter for extraction of claim 15, wherein a substance impermeable for X-ray is mixed with the resin.

19. The catheter for extraction of claim 18, wherein the tube member is equipped with a marker impermeable for X-ray.

20. The catheter for extraction of claim 19, wherein a tip for suppressing the damage of the biolumen is installed on the distal end of the catheter for extraction.

21. The catheter for extraction of claim 19, wherein a tip for suppressing the damage of the biolumen is installed on the distal end of the subcatheter.

22. The catheter for extraction of claim 21, wherein the tip is composed of a resin and is an elastomer with a shore hardness of at least 25 D and at most 40 D, or the blend of the elastomers.

23. The catheter for extraction of claim 22, wherein a substance impermeable for X-ray is mixed with the resin.

24. The catheter for extraction of claim 23, wherein the biolumen is the coronary sinus.

25. A catheter for extracorporeal circulation having distal end and proximal end, whose distal end is arranged in the coronary sinus of the heart that can hydrate the blood into the body after externally extracting blood from the distal end, wherein the catheter has blood extracting lumen extending from the distal end to the proximal end and blood return lumen extending from the proximal end of the catheter to the fixed length distal end.

26. The catheter for extracorporeal circulation of claim 25, wherein when the minimum sectional area to the circumferential direction of the blood extracting lumen is referred to as S1 and an immersion side length is referred to as L1, an equivalent diameter D1 satisfies the formula defined by D1=(4×

S1)/L1 and the equivalent diameter D1 is at least 1.80 mm, and when the minimum sectional area to the circumferential direction of the blood return lumen is referred to as S2 and an immersion side length is referred to as L2, an equivalent diameter D2 satisfies the formula defined by D2=(4×

S2)/L2 and the equivalent diameter D2 is at least 1.30 mm and at most 2.00 mm.

27. The catheter for extracorporeal circulation of claim 26, wherein side holes are provided at the distal end side of the catheter for extracorporeal circulation.

28. The catheter for extracorporeal circulation of claim 27, wherein side holes are at least 2 and at most 10.

29. The catheter for extracorporeal circulation of claim 28, wherein the number of the side hole existing on the same circumference is 1.

30. The catheter for extracorporeal circulation of claim 29, wherein the side holes are spirally arranged.

31. The catheter for extracorporeal circulation of claim 30, wherein when the sectional area of the side hole is referred to as S3 and an immersion side length is referred to as L3, an equivalent diameter D3 satisfies the formula defined by D3=(4×

S3)/L3 and the equivalent diameter D3 is at least 1.80 mm.

32. The catheter for extracorporeal circulation of claim 31, wherein the catheter for extracorporeal circulation is composed of the combination of a braiding tubing complexing metal and a resin and a tube made of a resin.

33. The catheter for extracorporeal circulation of claim 32, wherein the distal end side is composed of a tube made of a resin.

34. The catheter for extracorporeal circulation of claim 33, wherein the resin comprises an elastomer with a shore hardness of at least 25 D and at most 75 D, or the blend of the elastomers.

35. The catheter for extracorporeal circulation of claim 34, wherein the elastomer is a polyamide elastomer.

36. The catheter for extracorporeal circulation of claim 34, wherein a substance impermeable for X-ray is mixed with the resin.

37. The catheter for extracorporeal circulation of claim 36, wherein hydrophilic coating is carried out on the outer face of the catheter for extracorporeal circulation.

38. The catheter for extracorporeal circulation of claim 37, having a subeatheter detachably installed in the blood extracting lumen.

39. The catheter for extracorporeal circulation of claim 38, wherein the subcatheter is composed of a flexible tube member.

40. The catheter for extracorporeal circulation of claim 39, wherein the resin is either of a high density polyethylene and a low density polyethylene.

41. The catheter for extracorporeal circulation of claim 39, wherein the resin is either selected from a group comprising a polytetrafluoroethylene (PTFE), a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), a tetrafluoroethylene-hexafluoropropylene copolymer (FEP), a tetrafluoroethylene-ethylene copolymer (ETFE), a polyvinylidene fluoride (PVDF) and a polychlorotrifluoroethylene (PCTFE).

42. The catheter for extracorporeal circulation of claim 39, wherein the resin is a polyamide elastomer.

43. The catheter for extracorporeal circulation of claim 39, wherein a substance impermeable for X-ray is mixed with the resin.

44. The catheter for extracorporeal circulation of claim 43, wherein the tube member is equipped with a marker impermeable for X-ray.

45. The catheter for extracorporeal circulation of claim 44, wherein a tip for suppressing the damage of the biolumen is installed on the distal end of the catheter for extracorporeal circulation.

46. The catheter for extracorporeal circulation of claim 44, wherein a tip for suppressing the damage of the coronary sinus is installed on the distal end of the subcatheter.

47. The catheter for extracorporeal circulation of claim 46, wherein the tip is composed of a resin and is an elastomer with a shore hardness of at least 25 D and at most 40 D, or the blend of the elastomers.

48. The catheter for extracorporeal circulation of claim 47, wherein a substance impermeable for X-ray is mixed with the resin.

49. A method of actuating a catheter for extracorporeal circulation, wherein the catheter has distal end and proximal end, the catheter has blood extracting lumen extending from the distal end to the proximal end and blood return lumen extending from the proximal end of the catheter to the fixed length distal end, the blood is extracted from the distal end of the blood extracting lumen arranged in the coronary sinus of patient'"'"'s heart and the blood is returned from the blood extracting lumen arranged in the body of a patient into the body of the patient.

50. The method of claim 49, further equipped with that when the minimum sectional area to the circumferential direction of the blood extracting lumen of the catheter for extracorporeal circulation is referred to as S1 and an immersion side length is referred to as L1, an equivalent diameter D1 satisfies the formula defined by D1=(4×

S1)/L1 and the equivalent diameter D1 is at least 1.80 mm, and when the minimum sectional area to the circumferential direction of the blood return lumen is referred to as S2 and the immersion side length is referred to as L2, an equivalent diameter D2 satisfies the formula defined by D2=(4×

S2)/L2 and the equivalent diameter D2 is at least 1.30 mm and at most 2.00 mm.