JPH07406A - Embolus coil and insertion jig - Google Patents

Abstract

PURPOSE:To provide an embolus coil held in the lumen of the body over a short or long period of time to embolize the lumen. CONSTITUTION:At least one ring 3 is provided to the arbitrary part of an indwelling embolus coil 1 and fibers 5 are partially or entirely wound around the periphery of the coil 1. The embolus coil 1 is molded into a hand drum-shape and the fibers 5 are partially or entirely wound around the embolus coil 1. The arbitrary part of the coil 1 is fixed to a guide wire 2 in the vicinity of the leading end thereof through a fixing band 6A and a wire 4A is passed through the gap between the fixing band 6A and the guide wire 2 and a fixing band 6B is passed through the arbitrary part of the wire guide 2 to be partially fixed and a wire 4B is passed through the gap between the guide wire 2 and the fixing band 6B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an embolic coil and an inserter which are left in the body for a short term or a long term to close a lumen wall or block intraluminal traffic.

[0002]

2. Description of the Related Art There is no application in which an embolic coil (1) according to claim 1 is provided with a ring (3). A ring-shaped coil or a cylindrical coil is known as a conventional vascular embolization technique. As the material, stainless steel or platinum is used to wrap Dacron fibers around the outer circumference of the coil. When this is used, the catheter tip is left in the target position, and as shown in FIG. By inserting and pushing the coil with the guide wire,
The coil is pushed out from the tip of the catheter, restores the original ring-shaped coil, and embolizes the blood vessel. (For example, refer to the Japanese Medical Journal 44: 585-592 (1984) and the Nikkei Medical Bulletin Vol. 30, No. 1, 13P, 1985).

As a technique for closing a blood vessel wall, a catheter is placed in a target blood vessel, a sponge-like embolizing substance is inserted into a lumen of the catheter, and the embolizing substance is pushed out from the catheter with a pushing catheter or a pushing guide wire. A spongy embolic material is placed inside. In this case, a sponge or sheet-shaped embolic substance is used as the embolic substance. (For example, Nikkei Medical Bulletin Vol. 30, No. 1, 57P, 1985, Japanese Patent Publication No. 2-2
(See No. 77459, Japanese Patent Publication No. 2-307480)

No application for the insert according to claim 3 is found.

[0005]

The prior art has the following drawbacks. B) Since it is pushed out from the tip of the catheter, it cannot be used for lumens where the catheter cannot reach. B) Since the method is to pass through the catheter, if the tip of the catheter moves from the target site during the operation, the coil cannot be removed from the catheter, and the catheter must be replaced and reinserted. C) Since the coil does not have a recovery ring, it is dangerous because it cannot be recovered even if the coil shape or size is mistaken after being pushed out from the tip. D) Since the coil makes a shape when the coil comes out of the tip of the catheter, it is not possible to control the formation when the coil is restored. E) Since the coil has a ring shape or a cylindrical shape, when it is placed in a blood vessel, it becomes an open end and a complete embolization cannot be achieved unless a plurality of coils are placed. F) ASD, V because the coil shape is ring or cylindrical
It cannot close blood vessel walls or tissue walls such as SD and PDA. G) Since the embolization material becomes large, the diameter of the catheter becomes large, and the blood vessel at the insertion part is greatly damaged, and it cannot be used when the blood vessel at the insertion part is thin. H) The shape and size of the embolic material is fixed, so it cannot be executed unless a patient is selected.

(1) Since a large-diameter embolic substance passes through the blood vessel, it damages the blood vessel. Nu) Surgery is difficult, requires skill, and requires a long operation time. The present invention has been invented to eliminate the above drawbacks.

[0007]

At least one ring (3) is provided at an arbitrary portion of an embolization coil (1).
Furthermore, the fiber (5) is wound around a part or the entire circumference of the embolic coil (1). In addition, the embolic coil (1) is molded into a loop shape, and the fiber (2) is wound around the coil (1). Further, the fixing bands (6A, 6B) are passed through the guide wire (2) to fix the portions of the fixing bands (6A, 6B) at arbitrary points. Insert the wire (4) into the gap between the guide wire (2) and the fixed band (6A).
Through the guide wire (2) and the fixing band (6).
Pass the wire (4B) through the gap with B). An embolic coil and an insertion tool having the above configurations.

[0008]

As shown in FIG. 1, one end of the snare wire (4A) provided at the tip of the guide wire (2) is passed through the ring (3A) provided at the tip of the coil (1). Next, both ends of the snare wire are pulled toward the proximal side and fixed to the tip of the coil (1). Similarly, one end of the wire (4B) provided at the end of the coil (1) is passed through the ring (3B), and the coil (1) is linearly extended to the proximal side and fixed on the guide wire (2). In this state, the guide wire (2) with the coil (1) held at a target position is passed through the sheath mantle or the catheter lumen, and the wire (4A) at the distal end and the wire (4A) at the distal end ( 4B)
Unlock the fixed. The embolic coil (1) returns to its original shape, pulling only one end of each wire (4A, 4B) to remove the wire (4A, 4B) and remove the guide wire (2) outside the body. When the coil (1) is placed in the body for a short period of time, the wire (4B) on the proximal side may be left. When the coil (1) achieves its purpose and recovers, both ends of the wire (4A) are inserted from the tip of the catheter, and the catheter is advanced along the wire (4A) to embolize the coil (1).
Is collected in the catheter lumen and removed outside the body. If the coil (1) moves to a position other than the target position during placement,
The position can be corrected by operating the wires (4A, 4B). Further, as shown in FIG. 2, the coil (1) is expanded into a rod shape and inserted into the catheter (3), and the distal end of the coil (1) is pushed toward the distal end by the guide wire (2). When 1) comes out, return to the original mold and mold the continuous mold. There, the blood flow is cut off.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the drawings. One end of a wire (4A) provided at the tip of a guide wire is passed through a ring (3A) provided at the tip of a coil (1) as shown in the drawing. Both ends of the wire (4A) are pulled toward the proximal side, and the coil tip is fixed to the tip of the guide wire (2). Similarly, a ring (3) provided at the end of the coil (1)
B), one end of the wire (4B) is passed through the ring (3B), and the coil is linearly extended to the proximal side and fixed on the guide wire (2). In this state, the sheath mantle is passed through to allow the coil with guide wire (1) to reach the target position, and the fixation of the tip wire (4A) and the proximal snare wire (4B) is released. Once the wires (4A, 4B) have been unfixed, the embolic coil (1) returns to its original shape and remains in the lumen. When the purpose is reached, the guide wire (2) and the wires (4A, 4B) are removed. If you want to leave the coil for a short period of time and retrieve the coil non-operatively, the embolic coil (1) should be placed on the guide wire (2) with the wire (4).
Remove the wire (4A) at the distal part while being fixed by A, 4B) to release the fixation of the embolic coil (1) and remove the guide wire (2), leaving the snare wire (4B) at the proximal part. Good.

The material of the coil is preferably a recoverable metal, a noble metal or a plastic which is harmless to the human body and has contrast properties.

The structure of the coil may be a single wire, but a metal wire (11) may be wound around the core material (10) as shown in FIG. 10 in the same structure as the angiographic caded wire.

The fiber (5) wound around the coil can be wound around the entire circumference of the coil or at any desired position. It can also be fixed.
The material is preferably chemical fiber, and ultrafine metal wire can also be used.

Another embodiment will be described below in detail with reference to the drawings. Example 2. As shown in FIG. 3, an arbitrary part of the coil formed in a zigzag shape is wound around a coil (5) wound into a rod shape and inserted from the end of the catheter as shown in FIG. Therefore, when the guide wire is inserted from the distal end of the catheter into the lumen of the catheter and the coil is moved toward the distal end, and the embolic coil (1) emerges from the distal end of the catheter (7), the embolic coil (1) remains in the original position in the blood vessel. It returns to the shape and becomes a continuous shape, blocking blood flow. Example 3. As shown in FIG. 4, it is also possible to use a discontinuous splint type, which is particularly effective for treating PDA. The material is stainless alloy, and the fiber (5) is wound around a part of the coil. Example 4. As shown in FIG. 5, a conical shape can also be used, and the material is a stainless alloy, and the fiber (5) can be wound around a part of the embolic coil (1). Example 5. As shown in FIG. 6, the embolic coil (1) having a shape in which the central portions of two spiral coils are fixed is effective when closing the blood vessel wall, and the material of the embolic coil (1) is preferably a stainless alloy or a titanium alloy. Although the fiber (5) can be used without being wound, it is preferable that the fiber (5) is short when the fiber (5) is wound. Example 6. As shown in FIG. 7, an ellipsoidal embolic coil (1) can also be used and is effective for a table with a large blood flow rate.

With respect to the coil inserting tool of claim 3, a fixing band (6A) is provided near the tip of the guide wire (2) as shown in FIG.
And a part of the fixing band (6B) is fixed at an arbitrary position on the distal portion of the guide wire (2). The metal wire (4A) is passed through the gap between the guide wire (2) and the fixed band (6A), and the ring (3A) is passed through the fixed band (6A).
Wire (4A) through the gap from the front to the end
Pull both ends of the to the distal direction. Similarly a guide wire (2)
The wire (4) to the fixing band (6B) attached to the distal part of the
Pass B) through ring (3B). Next, the fixed belt (6B)
Wire (4
Pass B) and pull both ends of wire (4B). As described above, the embolic coil (1) is fixed to the guide wire (2) and moved to the target site. When the target part is reached, the wire (4A, 4B) is unwound to restore the shape of the embolic coil (1), and one end of the wire (4A) and one end of the wire (4B) are removed from the coil. To do.

The material of the guide wire may be metal or plastic, but it is desirable that the tip is soft and the shaft portion is hard, and it is strong against bending. It may also be a catheter. (A) As shown in FIG. 8, the end of the embolic coil (1) can be a pigtail type, and when the embolic coil (1) is placed in a blood vessel, the blood flow can be completely blocked in a short time. (B) Metal fibers and chemical fibers or threads can be attached to all or part of the circumference of all coils, and blood plasma and erythrocytes can be attached to the fibers in the blood vessel, and vascular embolization can be performed early. (C) As shown in FIG. 9, all coils (1) can be provided with a plurality of detents (9) at arbitrary positions, and it is possible to prevent the coils from moving early in the blood vessel, which is safe. (E) In the present invention, the coil may be made of metal, noble metal, alloy, or plastic, but is preferably a metal having good recoverability such as stainless steel, elastic alloy or spring steel. F) A single metal wire or a plastic wire can be used for the coil structure, but a structure similar to the guide wire in which the metal wire (11) is wound around the core material (10) as shown in FIG. 10 is inexpensive and can be manufactured. Easy. G) All coils have one or both ends as shown in FIG.
Threading holes or curls can be provided for recovery and position correction of the embolic coil (1). H) A gripper receptacle (13) can be formed at one or both ends of the embolic coil (1) so that the gripper for coil position correction can be easily gripped as shown in FIG.

The staggered shape is a shape in which the vertices of two triangular pyramids are joined on a straight line. A shape in which two upper surfaces of two triangular truncated pyramids are joined to each other, including a barbell type.

The case where one bottom surface is small is also included.

The structure of the shaft of the embolic coil (1) may be a single wire, but it may be the same structure as a guide wire for angiography.

Rings (3) can be fixed to one end and both ends of the embolic coil (1). The material can be made of metal wire or plastic wire. Similarly, one end and both ends of the embolic coil (1) can be processed into a ring shape.

As the coil, a rod-shaped embolic coil (1) can be used and is effective when the blood flow is stationary or when the blood flow is slow. The coil can be used without winding the fiber (5).

A fine thread-shaped embolic coil (1) can also be used and is effective when used for an aneurysm. The structure may be a single wire or a structure similar to a guide wire. The material can be soft metal or plastic. Holes or rings can be made at one and both ends of the filament coil. You may ring-process one end and both ends of a filamentous coil. Further, it is possible to make one end and both ends of the filamentous coil a part of the coil so that the gripper can be easily grasped.

For the fastening bands (6A, 6B), metal or plastic rings are preferred.

Regarding the wire, it is desirable that the wire is a thin wire of metal or plastic that has contrast and has tension.

The size and the number of turns of the coil (1) can be freely selected.

The coil insertion tool can be used for inserting an indwelling body other than a coil.

[0026]

【The invention's effect】

B) Since it is a method of carrying the coil to the target position while holding it on the guide wire, it is possible to embolize even the lumen where the catheter does not pass. B) Since the coil can be collected, the size and shape of the coil can be changed during placement.

C) It is safe to adjust the shape of the coil when restored by adjusting the tension of the wires (4A, 4B). D) Since the proximal wire (4B) can be left so that the embolic coil (1) can be collected, the embolic coil (1) is temporarily
Can be indwelled and collected non-operatively. Further, even when an accident occurs and the embolic coil (1) moves from the target position, the position can be corrected and recovered.

(E) Since the shape is continuous in the blood vessel, stable placement on the lumen wall is possible. F) Since it becomes a pigtail in the blood vessel as shown in FIG. 8, there is no leakage of blood flow and safe blood blockage is achieved.

(G) As shown in FIG. 6, it is possible to embolize a blood vessel wall portion which cannot be embolized by a ring-shaped coil or a cylindrical coil. H) Since the coil has a rod shape inside the catheter, a catheter having a small diameter can be used, and the blood vessel at the insertion portion is not damaged. (I) Since the coil can be freely shaped in size and shape, it can be used for a wide variety of blood vessels, and thus can be used without selecting a patient.

(C) Since the coil becomes rod-shaped by the catheter and passes through the lumen of the catheter, the inside of the blood vessel is not damaged. B) Since the coil is inserted into the lumen of the catheter and pushed out by the guide wire, the procedure is easy and anyone can do it.

[Brief description of drawings]

FIG. 1 is a side view in which an embolic coil is fixed to an insertion tool of the present invention.

FIG. 2 Conventional technology implementation diagram

FIG. 3 is a side view of the second embodiment of the present invention.

FIG. 4 is a side view of the third embodiment of the present invention.

FIG. 5 is a side view of the fourth embodiment of the present invention.

FIG. 6 is a side view of the fifth embodiment of the present invention.

FIG. 7 is a side view of the sixth embodiment of the present invention.

FIG. 8 is a front view of the end of the embolic coil of the present invention, which is pig-processed.

FIG. 9 is a side view of the embolic coil of the present invention provided with a movement stopper.

FIG. 10 is a sectional view of a guide wire.

FIG. 11 is a side view in which a hole is formed in the present invention.

FIG. 12 is a side view showing a receptacle for a gripper according to the present invention.

[Explanation of symbols]

 1 embolic coil 2 guide wire 3A, 3B ring 4A, 4B wire 5 fiber 6A, 6B fixed band 7 catheter 8 stopcock 9 detent 10 core material 11 metal wire 12 hole 13 gripper receptacle

Claims (3)

[Claims] 1. An embolic coil, characterized in that at least one ring (3) is provided at an arbitrary part of the embolic coil (1) and a fiber (5) is wound around the part or the entire circumference of the coil. 2. The embolic coil (1) is formed into a hook shape,
An embolic coil characterized in that a fiber (5) is wound around a part or the entire circumference of the coil. 3. A fixing band (6A) is passed through the fixing band (6A) in the vicinity of the tip of the guide wire (2), and the fixing band (6A) is fixed.
The wire (4A) is passed through the gap between the guide wire (2) and the guide wire (2), and the fixing band (6
The embolic coil insertion tool in which the portion of the fixing band (6B) is fixed through the B) and the wire (4B) is passed through the gap between the guide wire (2) and the fixing band (6B).