Vessel recanalizer

• US 20060276805A1
• Filed: 05/03/2005
• Published: 12/07/2006
• Est. Priority Date: 05/03/2005
• Status: Abandoned Application

• Current Assignee: Chun H.O. Yu
• Original Assignee: Chun H.O. Yu
• Inventors: Yu, Chun Ho
• Application Number:
  US11/121,848
• Publication Number:
  US 20060276805A1
• Time in Patent Office: Days
• US Class Current: 606/114
• CPC Class Codes: A61B 17/22031 Gripping instruments, e.g. forceps, for removing or smashing calculi A61B17/221 takes precedence
• CPC Class Codes: A61B 17/221 Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions surgical snare instruments A61B17/32056
• CPC Class Codes: A61B 2017/00287 Bags for minimally invasive surgery

Abstract

A vessel recanalizer, for removing a blood clog in a blood vessel, includes an elongated main wire, and a capturing pocket. When the main wire is in vicinity with the blood clog, the main wire is actuated to open the capturing pocket for capturing the blood clog therein. The capturing pocket is then closed to retain the blood clog within the capturing pocket. By pulling the main wire outwards, the blood clog is then removed from the blood vessel along with the capturing pocket.

Claims

1. A vessel recanalizer for removing a piece of blood clog in blood vessel, comprising:

an elongated main wire, which is sized and shaped for slidably extending along said blood vessel, having a control end and a guiding end adapted for reaching said blood clog in said blood vessel; and

a capturing pocket, which is provided at said main wire between said control end and said guiding end, and located near to the said guiding end, having an opening facing against said control end and a receiving cavity having a size adapted for receiving said blood clog therein, wherein said capturing pocket is adapted to fold between an opened position that said opening of said capturing pocket is opened to communicate said receiving cavity with an exterior of said capturing pocket and a closed position that said opening of said capturing pocket is closed to enclose said receiving cavity, such that when said guiding end of said main wire is slid forwardly in vicinity of said blood clog, said capturing pocket opens to said opened position for aligning said opening with said piece of blood clog, such that when said main wire is pulled backwardly, said receiving cavity collects said piece of blood clog in so as to remove said blood clog in said blood vessel.

2. The vessel recanalizer, as recited in claim 1, further comprising a introducer catheter slidably receiving said main wire therein, wherein said introducer catheter is slid backward against said main wire to open said capturing pocket when said capturing pocket is slid out of said introducer catheter.

3. The vessel recanalizer, as recited in claim 1, wherein said capturing pocket further comprises a restoring ring mounted at said opening, wherein said restoring ring having a flexibility expands a size thereof to open said opening of said capturing pocket when said capturing pocket is slid out of said introducer catheter and contracts said size to close said capturing pocket after said capturing pocket is slidably pulled back into said introducer catheter.

4. The vessel recanalizer, as recited in claim 2, wherein said capturing pocket further comprises a restoring ring mounted at said opening, wherein said restoring ring having a flexibility expands a size thereof to open said opening of said capturing pocket when said capturing pocket is slid out of said introducer catheter and contracts said size to close said capturing pocket after said capturing pocket is slidably pulled back into said introducer catheter.

5. The vessel recanalizer, as recited in claim 4, further comprises a retriever sheath slidably receiving said introducer catheter in such a manner that said retriever sheath is capable of slidably inserted into said blood vessel, and said introducer catheter is guided into said blood vessel therethrough.

6. The vessel recanalizer, as recited in claim 3, wherein said restoring ring is made of thermo sensitive material that said restoring ring increases in stiffness thereof at a body temperature.

7. The vessel recanalizer, as recited in claim 4, wherein said restoring ring is made of thermo sensitive material that said restoring ring increases in stiffness thereof at a body temperature.

8. The vessel recanalizer, as recited in claim 4, wherein said restoring ring has a metallic memory that said restoring ring returns to an original shape to open up said opening of said capturing pocket.

9. The vessel recanalizer, as recited in claim 7, wherein said restoring ring has a metallic memory that said restoring ring returns to an original shape to open up said opening of said capturing pocket.

10. The vessel recanalizer, as recited in claim 4, wherein said restoring ring is made of nitinol.

11. The vessel recanalizer, as recited in claim 7, wherein said restoring ring is made of nitinol.

12. The vessel recanalizer, as recited in claim 9, wherein said restoring ring is made of nitinol.

13. The vessel recanalizer, as recited in claim 1, wherein said capturing pocket further has a plurality of pores for allowing blood passing therethrough to ensure said blood clog to be captured in said capturing pocket when said capturing pocket is slidably pulled backward.

14. The vessel recanalizer, as recited in claim 2, wherein said capturing pocket further has a plurality of pores for allowing blood passing therethrough to ensure said blood clog to be captured in said capturing pocket when said capturing pocket is slidably pulled backward.

16. The vessel recanalizer, as recited in claim 12, wherein said capturing pocket further has a plurality of pores for allowing blood passing therethrough to ensure said blood clog to be captured in said capturing pocket when said capturing pocket is slidably pulled backward.

17. The vessel recanalizer, as recited in claim 1, wherein said capturing pocket has a tapered shape reducing a size from said opening for reinforcing said blood clog to be captured in said capturing pocket when said capturing pocket is slidably pulled backward.

18. The vessel recanalizer, as recited in claim 5, wherein said capturing pocket has a tapered shape reducing a size from said opening for reinforcing said blood clog to be captured in said capturing pocket when said capturing pocket is slidably pulled backward.

19. The vessel recanalizer, as recited in claim 12, wherein said capturing pocket has a tapered shape reducing a size from said opening for reinforcing said blood clog to be captured in said capturing pocket when said capturing pocket is slidably pulled backward.

20. The vessel recanalizer, as recited in claim 16, wherein said capturing pocket has a tapered shape reducing a size from said opening for reinforcing said blood clog to be captured in said capturing pocket when said capturing pocket is slidably pulled backward.

21. The vessel recanalizer, as recited in claim 1, wherein said main wire further has a floppy end portion formed at said guiding end towards said capturing pocket for allowing said main wire to extend along said blood vessel until said capturing pocket reaches said blood clog.

22. The vessel recanalizer, as recited in claim 4, wherein said main wire further has a floppy end portion formed at said guiding end towards said capturing pocket for allowing said main wire to extend along said blood vessel until said capturing pocket reaches said blood clog.

23. The vessel recanalizer, as recited in claim 16, wherein said main wire further has a floppy end portion formed at said guiding end towards said capturing pocket for allowing said main wire to extend along said blood vessel until said capturing pocket reaches said blood clog.

24. The vessel recanalizer, as recited in claim 20, wherein said main wire further has a floppy end portion formed at said guiding end towards said capturing pocket for allowing said main wire to extend along said blood vessel until said capturing pocket reaches said blood clog.

25. The vessel recanalizer, as recited in claim 1, wherein said guiding end is covered by platinum.

26. The vessel recanalizer, as recited in claim 12, wherein said guiding end is covered by platinum.

27. The vessel recanalizer, as recited in claim 24, wherein said guiding end is covered by platinum.

15. The vessel recanalizer, as recited in claim , wherein said capturing pocket further has a plurality of pores for allowing blood passing therethrough to ensure said blood clog to be captured in said capturing pocket when said capturing pocket is slidably pulled backward.

28. A method for removing blood clog in blood vessel by a vessel recanalizer which comprises a main wire and a capturing pocket provided thereon, comprising the steps of:

(a) slidably inserting the vessel recanalizer along said blood vessel until said capturing pocket is positioned in vicinity of said blood clog;

(b) opening said capturing pocket and aligning an opening thereof towards said blood clog;

(c) capturing said blood clog in said capturing pocket;

(d) closing said opening of said capturing pocket to trap said piece of blood clog therein; and

(e) slidably ejecting said main wire from said blood vessel to remove said blood clog therein.

29. The method as recited in claim 28, in step (b), further comprising the steps of:

(b.1) slidably pulling said introducer catheter backward against said main wire until said capturing pocket is slid out thereof to open said opening of said capturing pocket, wherein said main wire is slidably received in said introducer catheter to retain said capturing pocket in a closed position while said introducer catheter is slid along said blood vessel to locate said blood clog; and

(b.2) expanding a restoring ring at said opening of said capturing pocket to fully open said opening thereof.

30. The method, as recited in claim 29, in step (d), further comprising the steps of:

(d.1) slidably pulling said main wire along said introducer catheter in a backward direction;

(d.2) contracting said restoring ring against said introducer catheter to enclose said blood clog in said capturing pocket; and

(d.3) slidably pulling said main wire and introducer catheter along said retriever sheath until said capturing pocket is slidably received in said retriever sheath.

31. The method, as recited in claim 30, wherein said restoring ring is made of thermo sensitive material that said restoring ring increases a stiffness thereof at a body temperature.

32. The method, as recited in claim 30, wherein said restoring ring has a metallic memory that said restoring ring returns to an original shape to open up said opening of said capturing pocket.

33. The method, as recited in claim 31, wherein said restoring ring has a metallic memory that said restoring ring returns to an original shape to open up said opening of said capturing pocket.

34. The method, as recited in claim 30, wherein said restoring ring is made of nitinol.

35. The method, as recited in claim 33, wherein said restoring ring is made of nitinol.

36. The method as recited in claim 28, in step (a), wherein said main wire is slid along said blood vessel until said opening of said capturing pocket passes said blood clog.

37. The method as recited in claim 30, in step (a), wherein said main wire is slid along said blood vessel until said opening of said capturing pocket passes said blood clog.

38. The method, as recited in claim 28, in step (c), further comprising the steps of:

(c.1) guiding blood to flow out of said capturing pocket through a plurality of pore provided thereon when said blood clog is captured in said capturing pocket; and

(c.2) ensuring said blood clog to be trapped at a rear portion of said capturing pocket when closing said opening of said capturing pocket.

39. The method as recited in claim 30, in step (c), further comprising the steps of:

(c.1) guiding blood to flow out of said capturing pocket through a plurality of pore provided thereon when said blood clog is captured in said capturing pocket; and

(c.2) ensuring said piece of blood clog to be trapped at a rear portion of said capturing pocket when closing said opening of said capturing pocket.

40. The method as recited in claim 37, in step (c), further comprising the steps of:

(c.1) guiding blood to flow out of said capturing pocket through a plurality of pore provided thereon when said blood clog is captured in said capturing pocket; and

(c.2) ensuring said piece of blood clog to be trapped at a rear portion of said capturing pocket when closing said opening of said capturing pocket.