JPH09168598A - Coil, pusher and fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use these coil, a pusher and a fixture for the obstruction of a blood vessel and the fixing of a catheter. SOLUTION: This coil 1 has one open end of both open ends, and is provided with a stopper 6 of arbitrarily selected shape on the coil 1, and also a connector 4 at the arbitrarily selected area of the coil 1. In addition, a pusher 5 of arbitrarily selected shape is installed at an arbitrarily selected part or arbitrarily selected parts of a single coil 1 or plural coils 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil used for occluding a blood vessel and fixing a catheter.

[0002]

2. Description of the Related Art The prior art includes vascular embolic coils. As a blood vessel embolization coil, it is known that a stainless wire is wound into a coil having a small diameter as shown in FIG.

When this is used, the tip of the catheter is left at the target site, and the coil is inserted from the end of the catheter.
Insert straight into the catheter as shown in 1. Next, a technique is known in which a pusher is inserted from the end of the catheter, the coil is pushed out from the catheter, the coil is restored to its original shape, and the coil is placed. (For example, RADIOLOGY, 135
(1980), 507-509).

[0004]

The prior art has the following drawbacks. Since it is made for the purpose of embolization of the blood vessel, it passes through the tip of the catheter with little resistance, so that the tip of the catheter cannot be left in the blood vessel for a long time, the tip of the catheter moves, and effective drug injection cannot be performed. In addition, the tip of the catheter may move and damage the lumen of the blood vessel.

In addition, a large number of coils are required to fix the tip of the catheter, which increases the cost. Moreover, since the coil is placed around the outer periphery of the tip of the catheter, another catheter is required, which makes the operation difficult and time-consuming.

Further, since the coil once inserted into the catheter cannot be recovered again, if the diameter of the blood vessel and the type of the coil do not match, the coil cannot be placed at the target position and may be washed away to other than the target site.

[0007]

DISCLOSURE OF THE INVENTION A stopper is provided at one end of a coil, and a fiber is provided on the outer circumference of the coil.

Further, as shown in FIG. 1, a connecting part is made on one end and both ends of the coil to provide fibers.

A blood flow blocker is attached to an arbitrary part of the coil.

Further, as shown in FIG. 13, a fixing material and a penetrating material are provided in the inner cavity of the pusher. The coil and pusher configured as described above.

[0011]

[Function] When using this coil,
Proceed from outside the body to the target site inside the body, extend the coil linearly from the distal end of the catheter as shown in FIG. 3, and insert it into the catheter. Next, a guide wire is inserted from the distal end of the catheter, and the guide wire is pushed toward the tip of the catheter as shown in FIG. 14, thereby advancing the coil to the target portion from the catheter tip. Fix it.

When using a coil having a connecting part as shown in FIG. 1, a penetrating material is inserted into the coil ring and the coil bore as shown in FIG. Next, the fixing member is tied to the penetrating member. In this state, insert the catheter into the catheter, pull out from the tip of the catheter, pull the penetrating material toward the operator at the desired site, and leave the penetrating material in the coil for about 4 mm to restore the coil.

If it is necessary to collect the coil, the penetrating member is pushed toward the distal end so that the coil is linear and the pusher fixing member and the penetrating member are simultaneously pulled toward the operator, so that the coil is collected into the catheter.

If the position and the restored shape of the coil are good, the penetrating material is completely removed from the coil and the coil is detached from the pusher to leave the coil in the blood vessel.

[0015]

EXAMPLE Example 1 will be described with reference to the drawing. As shown in FIG. 3, a coil is formed by thickening a part of the coil to form a stopper and winding a fiber around the outer circumference of the coil.

As a method of thickening a part of the coil, a stainless wire may be overlapped and wound around a part of the coil.

Further, as shown in FIG. 4, the winding diameter at one end of the coil may be changed to increase the resistance and a part of the coil may be left in the catheter.

The shape of the stopper may be any shape as long as it achieves the object of the present invention.

The second embodiment will be described with reference to FIG.
As you can see, with ring-shaped connecting parts made at both ends of the coil. The outer circumference of the coil is a coil in which fibers are wound all around. As the material of the ring, a wire material such as a metal wire or a plastic wire can be used. To make a ring, insert the ring into the coil. Or weld. Alternatively, there is a method of raising a part of the coil.

Also, as shown in FIG. 6, a coil may be used in which a core is inserted into the inner cavity of the coil to form connecting parts at both ends of the core, and fibers are wound around the outer circumference of the coil.

The third embodiment will be described with reference to the drawing. A coil in which one end or both ends of the coil is released and a thin wire can be inserted or inserted as shown in FIG.

When using this, a thin wire is placed in the target blood vessel from outside the body. The coil is then straightened and the extracorporeal end of the thin wire is inserted into the lumen of the coil. Next, insert a pusher having an empty space from the outer end of the small-diameter wire body, advance the coil, fix the wire at the target position, and advance the pusher toward the inside of the body. The coil returns to its original shape and is placed in the blood vessel away from the tip of the wire.

The structure is not limited as long as the structure of the coil can achieve the object of the present invention. In addition, the connecting parts are shown in Fig. 1.
As in No. 8, one end or both ends of the coil can be processed into a hook shape. Of course, it may be a ring or a sphere.

Explaining the pusher of the fourth embodiment, the fixing member and the penetrating member are passed through the inner cavity of the pusher as shown in FIG. When this is used, a penetrating material is passed through the coil coupling ring and the coil lumen as shown in FIG. next,
Wrap the fixing material around the penetrating material and tie it at the fixing material to form a ring. Next, let it pass through the catheter lumen in the state of FIG.
When the penetrating material is pulled toward the operator at the target position, the coil returns to its original shape and remains in the blood vessel.

The material of the pusher is preferably stainless alloy or platinum alloy, and plastic can be used. As shown in FIGS. 19, 20, and 21, a marker such as platinum can be formed on the pusher portion. Multiple markers may be used.

As the pusher, a rod-shaped pusher can be used as shown in FIG. The fixing material can be used even when the wire is folded back as shown in FIG. As for the material, alloy wire and plastic wire are desirable. Any material and shape of the fixing material, pusher, and penetrating material that achieve the object of the present invention may be used. The pusher may be a coil tube. The tip of the fixing material may be ring-shaped or straight. A penetrating material may be attached to the tip of the pusher.

To explain the fixture, as shown in FIG. 23, a fixing part is provided at both ends of the fixing port. As shown in FIG. 24, the pusher is inserted from one fixing port and the penetrating member and the fixing member are inserted from the other fixing port. Then, the fixing part A is rotated to squeeze the parts, and the pusher is fixed. Similarly, the fixing portion B is rotated to squeeze the tightening component in the fixing portion B, and the penetrating material and the fixing material are fixed. Although the work is performed in the above state, when the coil is moved, the fixing portion B is loosened and the penetrating member is pulled toward the operator, so that the coil is separated from the pusher. Fixture,
Fixing parts and fastening parts are made of resin such as plastic, or
Alloy such as stainless steel is preferable.

One of the fixed parts may be a luer lock type.

The stopper described here is a part of the coil that remains inside the catheter to fix the blood vessel and the catheter with the coil to prevent the catheter from moving. As shown in FIG. Make thicker. Alternatively, the winding diameter of the coil is reduced as shown in FIG. Alternatively, as shown in FIG. 1, a connecting part can be formed at the coil end.

Further, it will be described here. The structure of the coil may be a) a structure in which one or both ends of the coil are opened. (B) It is also possible to make a coupling part having a core as shown in FIG. The structure does not matter as long as it achieves the object of the present invention.

As the marker, a platinum tube may be fixed as shown in FIG. A platinum wire may be wound around a part of the coil. The marker attachment position may be arbitrary.

The shape of the coil may be a) a claw type, an abacus ball type, a rugby ball type, a conical type, a barbell type, a cylindrical type, an 8-shaped type, or the like. The abacus ball type is a type in which the coil diameter at both ends of the coil is smaller than the central portion as shown in FIG. Usually, it is assumed that the coil has fibers wound around it. Of course, you can use it without it. The tsutsumi type is the shape of two cones
Although it is a fixed type, a barbell shape is also included.

The cross-sectional shape of the coil wire may be circular, elliptical, rectangular, or the like.

Although the ring can be made by passing the core through the coil lumen as shown in FIG. 6, the ring can be attached to the end of the coil as shown in FIG. The ring and stopper can be made simultaneously on the same coil section.

The fibers wound around the outer circumference of the coil may be chemical fibers, but Dacron fibers are particularly desirable. Metal fibers can also be used. The fibers can be made in any amount of the coil as needed.

As shown in FIG. 12, the blood flow blocking material is preferably a soft plastic resin. For example, Teflon, Dacron, etc. can be used.

The coil material may be a metal or a noble metal, and is preferably platinum or a stainless alloy. Elastic plastics can also be used. Further, any material may be used as long as it achieves the object of the present invention.

The coupling component may be spherical or rugby ball type, other than the ring as shown in FIG. It is also possible to make holes or convex concaves in the part of the spherical coupling part. Providing a gap in the coil portion as shown in FIG. 9 is also a coupling component. The shape of the component is not limited as long as it achieves the object of the present invention. In addition, the connecting parts are the pusher and coil,
The coil and pusher shall be able to release the connection at the target site.

The structure of the coil may be a wire rod or a tubular wire rod formed in a coil shape, but the wire rod may be wound in a rod shape and the rod wire rod may be wound in a coil shape. The structure of the coil is not limited as long as it achieves the purpose of the coil.

The structure of the coil may be such that a fine wire is wound into a thin cylindrical shape as shown in FIG. 8 and the restored shape is made into a circular thrust shape, a cylindrical shape, a circular shape or the like as shown in FIG. Usually, it is used by winding a thin wire around a cylindrical diameter to make an arbitrary shape. Further, the number of turns of the coil and the distance between the coils may be arbitrarily changed. In addition, the wire is simply wound and the restored shape is circular, cylindrical,
It can also be made into a circular shape. Further, a pusher having an arbitrary shape can be attached to one end or both ends of the coil. The pusher may be a wire rod. The method of attachment may be welding or tying. The pusher should have a diameter of 0.2 mm. The material can be plastic wire, stainless alloy, etc. Of course, it is possible to attach only the pusher parts. In addition, blood vessels can be blocked at an early stage by creating numerous scratches on the coil surface.

A resistor can be formed in the inner cavity as shown in FIG. The resistor makes it difficult to pull out when the fixing rod is pulled out from the coil. Usually, there is a method of fixing plastic such as silicon resin or alloy such as stainless alloy in the coil inner cavity. Also, any part of the coil may be narrowed. In FIG. 26, a narrow portion is provided at one end of the coil. The shape, material, and structure of the resistor are as follows:
Any object that achieves the object of the present invention may be used.

Further, a thick portion can be provided at the position of the penetrating member. The thickening method may be mounting of plastic resin or welding, or welding, but any location, shape, material, and method that achieves the object of the present invention may be used.

When using the present invention, as shown in FIG. 28, the thick portion of the penetrating material is inserted into the coil lumen, and the pusher is inserted into one of the penetrating material. Next, by inserting into the blood vessel in the state of FIG. 27 and pulling the penetrating material toward the operator at the target site and fixing the pusher by hand, the coil has some resistance,
Can be placed in a blood vessel apart from the penetrating material.

[0044]

According to the above-mentioned structure, since the coil has a stopper in a part thereof, it is difficult for the coil end to pass through from the catheter tip, and the catheter tip can be stably fixed to a target site for a long period of time.

Further, since the tip of the catheter can be securely fixed, the amount of coils used is small, and the operation can be completed easily and quickly.

Further, since the coil can be collected from the inside of the catheter, the coil can be safely removed from the body even if the size of the coil is different.

Further, with the configuration as shown in FIG. 7, the coil can be placed through the side hole of the catheter, so that the coil can be added after the catheter is placed.

Since the pusher has a penetrating material, the coil is linear and the passage resistance is small, and smooth insertion is possible.

Since the pusher has a fixing material, the coil does not come off early and it is safe.

Since the fixture has a plurality of fixing parts, the pusher can be operated with one hand.

[Brief description of the drawings]

FIG. 1 is a side view of a coil provided with a coupling component.

FIG. 2 is a side view in which a coil is connected to a pusher.

FIG. 3 is a side view in which a coil provided with a stopper is linearly extended.

FIG. 4 is a side view of a coil in which the coil diameter is changed.

FIG. 5 is a side view of the coil provided with a coupling component.

FIG. 6 is a side view in which a core is provided in the coil lumen.

FIG. 7 is a side view of a coil having a cavity in the coil.

FIG. 8 is a side view of a coil having a structure in which a wire is wound in a tube shape.

FIG. 9 is a side view of a coil in which a gap is provided in a coil portion.

FIG. 10 is a side view of a conventional coil.

FIG. 11 is a side view in which a conventional coil is linearly extended.

FIG. 12 is a side view in which blood flow is blocked in the coil.

FIG. 13 is a side view of the pusher according to the fourth embodiment.

FIG. 14: Side view of coil insertion

FIG. 15 is a side view of a catheter placed in a blood vessel.

FIG. 16 is a side view showing a marker provided on a coil.

FIG. 17: Side view of an abacus beaded coil

FIG. 18 is a side view of a coil with a hook of the present invention.

FIG. 19 is a side view of the pusher with a marker of the present invention.

FIG. 20: Side view of pusher with marker

FIG. 21 is a side view of a modified pusher according to the fifth embodiment.

FIG. 22 is a side view of a deformed fixing material according to the fifth embodiment.

FIG. 23 is a cutaway sectional view of a fixture.

FIG. 24 is a side view when the fixing tool is used.

FIG. 25 is a side view of a cutout in which a coil is provided with a resistor.

FIG. 26 is a side view in which a coil portion is thinned.

FIG. 27 is a side view of a notch when a coil with a resistor is coupled.

FIG. 28 is a side view of a partly thickened penetrating material.

[Explanation of symbols]

 1 Coil 2 Fiber 3 Catheter 4 Coupling Part 5 Pusher 6 Stopper 7 Welding 8 Core 9 Marker 10 Ring Spacing 11 Abacus Ball-shaped Coil 12 Thin Wire 13 Blood Flow Blocker 14 Fixture 15 Rod Pusher 16 Hook-shaped Coupling Part 17 Penetrating material 18 Fixing material 19 Fixing port 20 Fixing part A 21 Fixing part B 22 Parts 23 Resistor 24 Narrow part 25 Thick part

Claims (10)

[Claims] 1. A coil having one end or both ends open. 2. A coil in which a stopper having an arbitrary shape is provided on the coil. 3. A coil in which a coupling component is provided at an arbitrary portion of the coil. 4. A coil in which a pusher having an arbitrary shape is provided on an arbitrary portion of a single coil or a plurality of coils. 5. The coil according to claim 1, wherein the blood flow blocking material is provided on an arbitrary part of the coil. 6. The coil according to claim 1, wherein the fiber is provided on an arbitrary portion of the coil. 7. A coil in which any number of resistors of any shape are provided on any part of the coil. 8. A pusher in which a penetrating member is provided on an arbitrary portion of the pusher and a fixing member is provided on an arbitrary portion of the penetrating member. 9. The pusher of claim 8 having a single and multiple markers on any portion of the pusher. 10. A fixture having a plurality of fixing portions.