Intravascular foreign matter removing wire and medical implement

• US 8,303,612 B2
• Filed: 06/07/2006
• Issued: 11/06/2012
• Est. Priority Date: 06/20/2005
• Status: Active Grant

• Current Assignee: Terumo Kabushiki Kaisha
• Original Assignee: Terumo Kabushiki Kaisha
• Inventors: Nakao, Koji, Obitsu, Hideshi, Kanamaru, Takeshi
• Primary Examiner(s): Severson, Ryan
• Assistant Examiner(s): Papeika, Rachel S
• Application Number:
  US11/921,935
• Publication Number:
  US 20100016875A1
• Time in Patent Office: 2,344 Days
• Field of Search: 606/110, 606/113, 606/114, 606/127, 606/128, 606/159, 606/200
• US Class Current: 606/159
• 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 2017/22034 for gripping the obstruction or the tissue part from inside
• CPC Class Codes: A61B 2017/2212 having a closed distal end, e.g. a loop

Abstract

An intravascular foreign matter removing wire has a flexible long wire body, a first catching section located on the tip side of the wire body and operative to catch a foreign matter present inside a blood vessel, and a second catching section located in the vicinity of and on the base end side of the first catching section and operative to catch a foreign matter present inside a blood vessel.

Claims

1. An intravascular foreign matter removing wire comprising:

a flexible long wire body;

a first catching section located on a tip side of the wire body and operative to catch a foreign matter present inside a blood vessel;

a second catching section located in a vicinity of and on a base end side of said first catching section and operative to catch a foreign matter inside a blood vessel, the second catching section possessing a tip end part and a base end part, the tip end part of the second catching section being located closer to the first catching section than the base end part of the second catching section; and

an operating wire possessing a tip end part directly connected to the tip end part of the second catching section, the operating wire being movable with respect to the first catching section so that movement of the operating wire in a base end direction away from the first catching section moves the tip end part of the second catching section.

2. The intravascular foreign matter removing wire as set forth in claim 1, wherein the tip end part of the second catching section is connected to a base end part of the first catching section by a connecting wire, the connecting wire possessing a base end part fixed to the tip end part of the second catching wire and a tip end part fixed to a base end part of the first catching section, said first catching section is composed of at least two spaced apart branch wire parts extending distally from the tip end part of the connecting wire, the at least two branch wire parts including a first branch wire part and a second branch wire part, the first and second branch wire parts each possessing a tip end part remote from the second catching section, the first catching section also being composed of a plurality of filament parts each having one end fixed to the tip end part of the first branch wire part and an opposite end fixed to the tip end part of the second branch wire part so that each of the filament parts extends between the first and second branch wire parts.

3. The intravascular foreign matter removing wire as set forth in claim 1, wherein said second catching section is coil-like in shape.

4. The intravascular foreign matter removing wire as set forth in claim 1, wherein said second catching section is composed of a plurality of loop-formed loop wires arrayed along the longitudinal direction of said wire body.

5. The intravascular foreign matter removing wire as set forth in claim 4, wherein said plurality of loop wires are so formed that their respective formation directions are substantially the same, when said second catching section is viewed from the tip side of the second catching section in said longitudinal direction of said wire body.

6. The intravascular foreign matter removing wire as set forth in claim 4, wherein at least adjacent ones of said loop wires are so formed that their respective formation directions are different, when said second catching section is viewed from the tip side in said longitudinal direction of said wire body.

7. The intravascular foreign matter removing wire as set forth in claim 1, wherein said second catching section is deformable.

8. The intravascular foreign matter removing wire as set forth in claim 7, wherein said wire body includes a ring-shaped portion, and wherein an intermediate part of the operating wire positioned external of the wire body passes through the ring-shaped portion to support the intermediate part of said operating wire.

9. The intravascular foreign matter removing wire as set forth in claim 1, wherein a maximum outer diameter of said second catching section is smaller than the maximum outer diameter of said first catching section.

10. The intravascular foreign matter removing wire as set forth in claim 1, wherein the base end part of said first catching section and the tip end part of said second catching section are connected to each other by a connecting wire.

11. The intravascular foreign matter removing wire as set forth in claim 10, wherein at least one of said first catching section and said second catching section has antislipping means for preventing said foreign matter caught from slipping.

12. The intravascular foreign matter removing wire as set forth in claim 1, wherein at least one of said first catching section and said second catching section has a plurality of flexible cilia.

13. The intravascular foreign matter removing wire as set forth in claim 1, wherein at least one of said first catching section and said second catching section is composed of an alloy which shows super-elasticity in vivo.

14. The intravascular foreign matter removing wire as set forth in claim 1, wherein said wire body has a part varying in rigidity along the longitudinal direction of said wire body.

15. A medical implement comprising:

an intravascular foreign matter removing wire as set forth in claim 1; and

a catheter having a lumen capable of storing said intravascular foreign matter removing wire therein.

16. An intravascular device for removing foreign matter from a bodily lumen, the intravascular device comprising;

a flexible wire body having a distal end positionable inside the bodily lumen and a proximal end positionable outside the bodily lumen;

a first catching section connected to the distal end of the wire body and configured to catch foreign matter inside the bodily lumen;

a second catching section configured to catch foreign matter inside the bodily lumen, the second catching section comprising a first filamentous body and a second filamentous body, the second filamentous body surrounding the first filamentous body, the second filamentous body possessing a tip end part and a base end part, the tip end part of the second filamentous body being fixed to the first filamentous body and the base end part of the second filamentous body being fixed to the first filamentous body, the tip end part of the second filamentous body being located closer to the first catching section than the base end part of the second filamentous body; and

an operating wire possessing a tip end part connected to the tip end part of the second filamentous body and movable in a base end direction to cause the second catching section to curve into an arc-shape.

17. The intravascular device of claim 16, wherein the second filamentous body comprises a coil-shaped filamentous body and the first filamentous body is a rectilinear filamentous body.