Steerable catheter - Patent Review 4723936

Claims

We claim:

1. A steerable dilatation catheter means comprising:

a flexible catheter comprising a spring coil body defining a lumen, each of said catheter and said spring coil body having proximal and distal ends, the distal end of said spring coil body being closed, and said spring coil body having a flexible covering thereon,

dilatation balloon means positioned concentrically around the distal end of said spring coil body,

a deflection wire having proximal and distal ends and being substantially co-extensive with said spring coil body, the distal end of said deflection wire being attached to the distal end of said spring coil body, and

control means attached to the proximal end of said catheter, the proximal end of said deflection wire extending to the control means, the control means having engaging means which fixedly engages the proximal end of said deflection wire to cause said deflection wire to be displaced distally or proximally, said displacement causing the distal end of said catheter to bend out of or toward the line of its longitudinal axis, and the control means having rotation means to cause said deflection wire and said catheter to rotate together to cause the distal end of said catheter to rotate about its longitudinal axis.

2. The catheter means of claim 1, wherein there is spacing between the flexible covering and said spring coil body sufficient to facilitate inflation of the dilatation balloon.

3. The catheter means of claim 1 which comprises an anchor wire having proximal and distal ends, the proximal and distal ends of the anchor wire being affixed to the proximal and distal ends, respectively, of the spring coil body.

4. The catheter means of claim 1 which comprises an optical fiber having proximal and distal ends, the distal end of the optical fiber being attached to the distal end of the catheter and the proximal end of the optical fiber extending through the control means.

5. The catheter means of claim 4, wherein the optical fiber has a pressure sensing membrane at its distal end and means at its proximal end to convert a signal from the pressure sensing membrane into an electrical signal or pulse.

6. The catheter means of claim 4, wherein the optical fiber is within the lumen defined by said spring coil body.

7. The catheter means of claim 4, wherein the optical fiber is between said spring coil body and said flexible covering.

8. The catheter means of claim 1 which comprises a flexible tip having proximal and distal ends, the proximal end of the flexible tip being attached to the distal end of the spring coil body.

9. The catheter means of claim 8, wherein the flexible tip is a floppy wire comprised of spring wire.

10. The catheter means of claim 9, wherein the wire comprises radiopaque material selected from the group consisting of platinum, gold, tungsten, and tantalum.

11. The catheter means of claim 1, wherein the flexible covering comprises a flexible polymeric material.

12. The catheter means of claim 11, wherein the flexible polymeric material is polytetrafluoroethylene, polyethylene, or polyvinyl chloride.

13. The catheter means of claim 1, wherein the deflection wire is within the lumen defined by said spring coil body.

14. The catheter means of claim 1, wherein the deflection wire is between said spring coil body and said flexible covering.

15. The catheter means of claim 1, wherein the spring coil body comprises two or more spring coils.

16. The catheter means of claim 15, wherein the spring coil body comprises two spring coils having respective smaller and larger diameters, the proximal end of the spring coil with the smaller diameter being bonded to the inside of the distal end of the spring coil with the larger diameter.

17. The catheter means of claim 1, wherein said spring coil body is less tightly wound for a predetermined length at a point substantially adjacent to the distal end of said spring coil body and within the dilatation balloon means.

18. The catheter means of claim 17, wherein the dilatation balloon means is capable of being inflated by fluid entering the dilatation balloon means through the less tightly wound coils in said predetermined length.

19. A steerable dilatation catheter means comprising:

a flexible catheter comprising a spring coil body defining a lumen, each of said catheter and said spring coil body having proximal and distal ends, the distal end of said spring coil body being closed, and said spring coil body having a flexible covering thereon,

dilatation balloon means positioned concentrically around the distal end of said spring coil wire,

an anchor wire having a proximal and distal ends, the proximal and distal ends of the anchor wire being affixed to the proximal and distal ends, respectively, of the spring coil body, and

control means attached to the proximal end of said catheter, said control means having rotation means to cause said catheter and said anchor wire to rotate together to cause the distal end of said catheter to rotate about its longitudinal axis.

20. The catheter means of claim 19, wherein there is spacing between the flexible covering and said spring coil body sufficient to facilitate inflation of the dilatation balloon.

21. The catheter means of claim 19 which comprises an optical fiber having proximal and distal ends, the distal end of the optical fiber being attached to the distal end of the catheter and the proximal end of the optical fiber extending through the control means.

22. The catheter means of claim 21, wherein the optical fiber has a pressure sensing membrane at its distal end and means at its proximal end to convert a signal from the pressure sensing membrane into an electrical signal or pulse.

23. The catheter means of claim 21, wherein the optical fiber is within the lumen defined by said spring coil body.

24. The catheter means of claim 21, wherein the optical fiber is between said spring coil body and said flexible covering.

25. The catheter means of claim 19 which comprises a flexible tip having proximal and distal ends, the proximal end of the flexible tip being attached to the distal end of the spring coil body.

26. The catheter means of claim 25, wherein the flexible tip is a floppy wire comprised of spring wire.

27. The catheter means of claim 26, wherein the wire comprises radiopaque material selected from the group consisting of platinum, gold, tungsten, and tantalum.

28. The catheter means of claim 19, wherein the flexible covering comprises a flexible polymeric material.

29. The catheter means of claim 28, wherein the flexible polymeric material is polytetrafluoroethylene, polyethylene, or polyvinyl chloride.

30. The catheter means of claim 19, wherein the spring coil body comprises two or more spring coils.

31. The catheter means of claim 30, wherein the spring coil body comprises two spring coils having respective smaller and larger diameters, the proximal end of the spring coil with the smaller diameter being bonded to the inside of the distal end of the spring coil with the larger diameter.

32. The catheter means of claim 19, wherein said spring coil body is less tightly wound for a predetermined length at a point substantially adjacent to the distal end of said spring coil body.

33. The catheter means of claim 32, wherein the dilatation balloon is capable of being inflated by fluid entering the dilatation balloon through the less tightly wound coils in said predetermined length.

34. A steerable dilatation catheter means comprising:

a flexible catheter comprising a spring coil body defining a lumen, said spring coil body having proximal and distal ends, a flexible tip having proximal and distal ends, the proximal end of said flexible tip being positioned a short distance from the distal end of said spring coil body to form a discfontinuity, and a flexible covering, said flexible covering extending from the proximal end of said spring coil body along the length of said spring coil body across said discontinuity to the proximal end of said flexible tip,

dilatation balloon means positioned concentrically around said discontinuity,

a deflection wire having proximal and distal ends, said deflection wire extending substantially co-extensively with said spring coil body, the distal end of said deflection wire being attached to the proximal end of said flexible tip, and

control means attached to the proximal end of said spring coil body and having engaging means which fixedly engages the proximal end of said deflection wire to cause said deflection wire to be displaced distally or proximally, said displacement causing the distal end of said catheter to bend out of or toward the line of its longitudinal axis, and the control means having rotation means to cause said deflection wire and said catheter to rotate together to cause the distal end of said catheter to rotate about its longitudinal axis.

35. The catheter means of claim 34, wherein there is spacing between the flexible covering and said spring coil body sufficient to facilitate inflation of the dilatation balloon.

36. The catheter means of claim 34 which comprises an anchor wire having proximal and distal ends, the proximal and distal ends of the anchor wire being affixed to the proximal and distal ends, respectively, of the spring coil body.

37. The catheter means of claim 34 which comprises an optical fiber having proximal and distal ends, the distal end of the optical fiber being attached to the distal end of the catheter and the proximal end of the optical fiber extending through the control means.

38. The catheter means of claim 37, wherein the optical fiber has a pressure sensing membrane at its distal end and means at its proximal end to convert a signal from the pressure sensing membrane into an electrical signal or pulse.

39. The catheter means of claim 37, wherein the optical fiber is within the lumen defined by said spring coil body.

40. The catheter means of claim 37, wherein the optical fiber is between said spring coil body and said flexible covering.

41. The catheter means of claim 34, wherein the flexible tip is a floppy wire comprised of spring wire.

42. The catheter means of claim 41, wherein the wire comprises radiopaque material selected from the group consisting of platinum, gold, tungsten, and tantalum.

43. The catheter means of claim 34, wherein the flexible covering comprises a flexible polymeric material.

44. The catheter means of claim 43, wherein the flexible polymeric material is polytetrafluoroethylene, polyethylene, or polyvinyl chloride.

45. The catheter means of claim 34, wherein the deflection wire is within the lumen defined by said spring coil body.

46. The catheter means of claim 34, wherein the deflection wire is between said spring coil body and said flexible covering.

47. The catheter means of claim 34, wherein the spring coil body comprises two or more spring coils.

48. A steerable catheter means comprising:

a flexible catheter comprising a spring coil body defining a lumen, each of said catheter and said spring coil body having proximal and distal ends, the distal end of said spring coil body being open,

a deflection wire having proximal and distal ends and being substantially co-extensive with said spring