JPH077970Y2 - Catheter guide wire manipulation tool - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operating tool for a guide wire for introducing a catheter used in an angiographic examination, and more particularly, the guide wire from the puncture hole of the hip artery or the elbow artery to the aorta, or the primary aorta thereof. When inserting into the limb or secondary limb under selective / super-selective operation, the guide wire can be pushed, pulled, and rotated securely without loss. In addition, it is designed so that it can be added safely and smoothly.

[0002]

2. Description of the Related Art When performing angiographic examination based on DSA or other computer images, the punctures made in the hip or elbow arteries are introduced into the aorta, and further from the aorta to the primary limb or secondary and tertiary limbs. It is necessary to introduce a catheter into the limb and inject the contrast agent through the catheter.
Since the catheter has a slender and flexible tube shape, it is pushed forward from the proximal part, and the tip is smoothly and safely introduced while properly changing its direction according to the bending of the aorta and its various limbs. Is impossible,
This is especially true when introducing a catheter that does not have a peculiar bending shape (so-called bending tendency) at the distal end, and when performing superselective introduction operation, or over a long distance from the puncture hole in the elbow artery to the various limbs of the aorta. , Becomes noticeable when manipulating very elongated catheters.

Therefore, conventionally, a guide wire whose tip is bent in a V-shape or a J-shape is also used as an introduction tool for the catheter, and the guide wire is inserted into the hollow inside of the catheter and then the guide wire is inserted. By pushing, pulling, or twisting, the catheter is introduced into the target position under the guidance of the way.

[0004]

However, since the guide wire is usually about 0.021 to 0.038 inches in thickness, it is very thin for safety and the surface is smooth, so that the guide wire is stable and firm. It is difficult to grip it, and especially if the surface is slightly wet due to the adhesion of water or blood, the fingertip of the operating hand will slip and slip.

The length of the guy wire is usually about 12
The length is 0 to 150 mm, and particularly in the case of being used together with a catheter for introducing into the various limbs of the aorta through the puncture hole of the elbow artery, the extremely thinning thereof is also required,
In order for one person to correctly and safely and quickly insert the guide wire into the catheter, advanced techniques and abundant experience are required.

As a result, during the operation of introducing into the blood vessel, the catheter is often pulled out of the wire, or conversely, the wire is excessively inserted into the catheter, and forgetting to pull it out of the blood vessel afterward. In addition, there is a risk that the inner wall surface of the blood vessel may be damaged due to incorrect direction change.

[0007]

SUMMARY OF THE INVENTION In view of such problems, the present invention provides a guide wire in its longitudinal direction (front-back direction).
As a manipulating tool for accurately applying not only the forward / backward operating force of pushing and pulling along the shaft but also its rotational operating force (rotational torque), the guide wire is arranged in the radial direction. A holding tube having a row of split grooves that can be received, a flat plate type that can be retracted in the split groove, and a pressing lever that is rotatably supported by the holding tube, and the lifting of the pressing lever is prevented. In order to do so, a retaining ring that is fitted over the holding cylinder is used, and the holding cylinder is fitted on the proximal portion of the guide wire, and then the pressing lever is pushed into the recessed groove and rotated. Thus, the pressing lever is pressure-bonded integrally with the surface of the guide wire so as to prevent relative idling and positional displacement, and the state is restricted by the retaining ring.

[0008]

According to the above construction of the present invention, since the holding tube of the operating tool is provided with the split grooves which can receive the guide wire in the radial direction, the holding tube is provided even from the middle of the guide wire. The long guide wire can be easily inserted, and there is no trouble of inserting or pulling it out from the back of the long guide wire one by one.

Further, if the holding cylinder is fitted into the proximal portion of the guide wire, and then the pressing lever is pushed into the split groove of the holding cylinder and is rotated, it is received in the split groove. The guide wire is pressed and integrated by the pressing lever so as to prevent relative slipping and positional displacement.

As a result, while the operating tool is stably gripped as a handle grip for operating the guide wire, the guide wire pushes and pulls back and forth without loss up to the tip portion, and the twisting and rotating operation force for changing the direction. (Rotation torque) can be applied, and the angiographic catheter can be accurately pushed to the target position of the blood vessel under the guideway action of the guide wire.

Further, since the fixed state between the guide wire and the operating tool is maintained by the retaining ring which prevents the pressing lever from floating, there is no risk of accidental loosening. In particular, if the retaining ring is shaped into a C-shape with a notch that matches the split groove of the holding cylinder, even if the retaining ring is fitted into the holding cylinder, the mating communication will be achieved. The holding tube can be fitted to the guide wire through the notch and the split groove, and in order to crimp the guide wire to the holding tube, the pressing lever can be rotated without any trouble, and then stopped. By rotating the wheel and keeping the notch and the split groove in a non-matching state, it is possible to prevent the pressing lever from floating, which is extremely convenient for handling and use.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The specific construction of the present invention will be described in detail below with reference to the illustrated embodiments. In FIGS. 1 and 2, (10) is a straight end having no peculiar bending shape (bending habit). The angiographic catheter (11) is a guide wire for introducing a catheter that is longer than the catheter (10) and has appropriate flexibility, and only the distal end portion (11a) thereof is highly flexible and is always J-shaped. It is designed to be restored and deformed into a peculiar bending shape (curvature) of a mold or a V-shape.

Then, the guide wire (11) is inserted into the hollow inside of the catheter (10) so as to be freely inserted and removed, and the wire (11) is used to set the catheter (10).
As shown in FIGS. 8 and 9 described later, the hip artery and elbow artery (A)
From the puncture hole (12) given to the aorta (B), and further various limbs (C) (D) derived from the aorta (B)
To smoothly guide the introduction.

In this case, after inserting the guide wire (11) into the catheter (10), the wire (1)
It is preferable that the elastic stopper ring (13) is fitted to the straight hand portion (11b) of 1). Then the catheter (1) for the guide wire (11)
This is because it is possible to prevent the accidental omission of the wire (0) and to keep the tip length (L1) of the wire (11) exposed from the tip of the catheter (10) constant at all times.

(G) is a guide wire (1) according to the present invention.
The operation tools of 1) are collectively referred to as the operation tools, which serve as an easy-to-grip grip handle for pushing, pulling, or rotating the guide wire (11). Is configured.

That is, (14) is a holding tube for the operating tool (G), which is made of a hard synthetic resin or other plastic material so as not to damage the surface of the guide wire (11) and has a constant length. It is formed in a cylindrical shape with a thickness of 10 mm and a thickness, and a guide wire receiving split groove (15) having a depth reaching from the circumferential surface to the center is opened, so that the entire U shape in a front view is almost U-shaped. Shaped.

The split groove (15) is, as is clear from the figure,
Since the holding tube (14) is arranged in a row over the entire length, the holding tube (14) itself is attached to the guide wire (11) even in the radial direction of the guide wire (11). The operating tool (G) can be fitted and removed conversely, which is extremely convenient for handling and using the operating tool (G).

Further, (16) is a parallel groove rail which is notched in a pair of wall surfaces facing each other which defines the dividing groove (15), and this is one end in the longitudinal direction of the holding tube (14). As a loading / unloading port, and a certain length (L
2) Only the cuts are lined up in a row, and the rear part is blind as it were.

On the other hand, (17) is a pressing lever that forms a pair with the holding tube (14), and is made of a hard synthetic resin or other plastic material, and the split groove () of the holding tube (14). 1
It is made in a flat plate type with a size that can appear and disappear in 5).
(18) is a pair of projections laterally extended from one end of the pressing lever (17) in the lengthwise direction, which corresponds to the groove rail (16) of the holding tube (14),
By being inserted into and engaged with the inside thereof, it can be assembled with the holding tube (14).

In the assembled state, the convex (1
Using 8) as a fulcrum of the lever action, the pressing lever (17) can be pushed into the split groove (15) of the holding tube (14) in a retracted state and rotated, and the push lever (17) can be inserted into the split groove (15). Due to the ventral surface of the depressed lever (17), the guide wire (1
1) The surface of 1) is pressed down, the guide wire (11) is clamped and fixed together with the holding tube (14), and the operation tool (G) is provided.
The guide wire (11) and the guide wire (11) can be kept incapable of slipping or displacement.

Reference numeral (19) is a knob for making use of the pushing operation, which is integrally erected from the other end of the pressing lever (17) and is always located on the circumferential surface of the holding cylinder (14). It is exposed. (20) is a pressing lever (1
The retaining ring (14) for preventing the floating of (7)
It is slidably fitted onto the circumferential surface of.

In this case, since the operation knob (19) stands up from the other end of the pressing lever (17), the retaining ring (20) fitted to the holding cylinder (14) from the remaining one end is retained. Even when the slide operation is performed, the operation knob (19) still retains the retaining ring (2
It functions as a stopper of 0) and there is no risk of falling off from the other end.

The retaining ring (20) is C-shaped as shown in the drawing, and has a notch (21) on its circumferential surface that can be fitted in the split groove (15) of the holding tube (14). Then,
By making the notch (21) and the split groove (15) communicate with each other, the holding cylinder (14) can be guided even when the retaining ring (20) is fitted in the holding cylinder (14). The wire (11) can be fitted in the radial direction, and the pressing lever (17) can be pushed and rotated into the split groove (15) without any trouble, and then the retaining ring (20) is rotated. Then, by keeping the notch (21) and the split groove (15) in a non-matching state, the floating of the pressing lever (17) can be reliably prevented.

In carrying out an angiographic examination in the above-mentioned construction, a guide wire (11) longer than this is inserted into the catheter (10), and the bent tip (11a) is inserted into the catheter (10). ) Is appropriately exposed from the tip of the wire, and the operating tool (G) of the present invention is fitted from the radial direction to the proximal portion (11b) of the wire (11) which is also exposed from the catheter (10). At this time, it is preferable to fit the stopper ring (13) into the proximal portion (11b) of the wire (11) from the rear side to prevent the wire from coming out backward.

That is, so that the guide wire (11) is received in the split groove (15) of the holding tube (14), the holding tube (14) is guided by the guide wire (1) as shown in FIG.
1) The push lever (17) fitted into the groove rail (16) of the holding tube (14) before and after the push lever (17),
As changing from the state of FIG. 4 to the state of FIGS. 5 to 7, the convex ring (18) is pushed around the fulcrum and rotated, and then the retaining ring (20) fitted into the pre-holding cylinder (14). Is slid and rotated to restrain the pressing lever (17) from floating.

In this case, the guide wire (11) is clamped and fixed between the holding tube (14) and the pressing lever (17), and the guide wire (11) cannot be displaced from the operating tool (G) or slip. Therefore, the guide wire (11) is pushed, pulled, or further rotated from the proximal portion (11b) thereof while grasping the operating tool (G) as a grip handle. Then, as shown in FIGS. 8 and 9, the catheter (10) can be smoothly and safely introduced into the aorta (B) and various limbs (C) and (D) thereof.

Under the accurate and loss-free guiding action of the guide wire (11), the catheter (1
0) is advanced to the target position of the blood vessel, and only the guide wire (11) is extracted, and the remaining catheter (1
Pour contrast agent into 0). The guide wire (1
Prior to the extraction of 1), the operation tool (G) can be removed from the wire (11) in the radial direction.
Needless to say.

[0028]

INDUSTRIAL APPLICABILITY As described above, the operating tool (G) of the guide wire (11) for introducing a catheter according to the present invention is provided with split grooves (15) for receiving the guide wire (11) in the radial direction. Holding tube (14) and its split groove (1
5) A holding lever (17) which is a flat plate type that can appear in and out of the holding barrel and is pivotally supported by the holding barrel (14), and a holding barrel for preventing the pushing lever (17) from floating. And a retaining ring (20) which is fitted over the holding tube (1).
4) is fitted to the proximal portion (11b) of the guide wire (11), and then the pressing lever (17) is pushed into the recessed groove (15) so as to be retracted, whereby the pressing lever (17) is rotated. ) Is integrally pressure-bonded to the surface of the guide wire (11) so as to prevent relative slippage and displacement, and
Since the state is determined to be restrained by the retaining ring (20), there is an effect that the problems of the prior art described at the beginning can be completely improved.

That is, since the holding tube (14) of the operating tool (G) is provided with split grooves (15) for receiving the guide wire (11) from the radial direction, the holding tube (14) is provided.
Can be easily fitted to or removed from a desired middle portion of the guide wire (11), and there is no need to insert or pull out the guide wire (11) one by one from the rear end portion, Particularly, it is extremely convenient in handling the long catheter introduction guide wire (11), and its operability is improved.

Further, after the holding tube (14) is fitted on the proximal portion (11b) of the guide wire (11) as described above,
When the push lever (17) is pushed into the split groove (15) and rotated, the push lever (17) is pushed against the surface of the guide wire (11) received in the split groove (15). Since the abdominal surface of 17) is pressure-bonded and integrated, and the relative slip between the operating tool (G) and the guide wire (11) and displacement of the guide wire (11) are kept impossible, the catheter (10) has a unique bending shape (bending tendency). ), No matter how thin and long the guide wire (11) for introduction into the blood vessel, the guide wire (11) can be held while gripping the operating tool (G) as a stable handle grip.
The forward / backward operation force and the twisting / rotating operation force (rotational torque) can be applied to the tip portion (11b) of the without loss.
This has the effect of allowing the catheter (10) to be accurately introduced into the target position of the blood vessel.

From that point of view, as described at the beginning, a straight catheter is provided especially over a long distance from the puncture hole (12) of the elbow artery (A) to the various limbs (C) (D) of the aorta (B). It can be said that when (10) is used as an operating tool (G) for a thin guide wire (11) for selectively and superselectively introducing it, it is extremely effective.

Further, the guide wire (1) is clamped between the holding cylinder (14) and the pressing lever (17).
Since the fixed state of 1) is maintained by the retaining ring (20) that prevents the pressing lever (17) from floating, there is no risk of accidentally loosening the fixed state. If a notch (21) matching the dividing groove (15) of the holding tube (14) is provided on the circumferential surface as an overall C-shape, the notch (21) and the dividing groove (15) are provided. Even if the retaining ring (20) is preliminarily fitted to the holding tube (14) in the assembled state, the holding tube (14) is fitted to the guide wire (11). Since the pressing lever (17) can be pushed in and rotated with respect to the split groove (15) of the holding tube (14), the operability can be further improved.

[Brief description of drawings]

FIG. 1 is an overall schematic side view showing a disassembled state of an angiographic catheter and an introduction guide wire thereof.

FIG. 2 is an overall schematic side view showing the same state as the insertion set.

FIG. 3 is a perspective view showing a disassembled state of the guide wire operating tool.

FIG. 4 is a side sectional view showing a fitted state of a holding cylinder with respect to a guide wire.

FIG. 5 is a side sectional view showing a crimped state of the guide wire corresponding to FIG.

FIG. 6 is a perspective view showing the same pinched state.

7 is a sectional view taken along line 7-7 of FIG.

FIG. 8 is an operation explanatory view showing a process of introducing a catheter into a blood vessel.

FIG. 9 is an operation explanatory view of the operation process subsequent to FIG. 8;

[Explanation of symbols]

 (10) -Catheter (11) -Guide wire (11a) -Tip (11b) -Hand (14) -Holding tube (15) -Split groove (17) -Pressing lever (20) -Snap ring (21) ) ・ Notch (G) ・ ・ Operating tool

Claims (2)

[Scope of utility model registration request] 1. A holding tube (14) in which split grooves (15) for receiving a guide wire (11) in a radial direction are arranged.
And a pressing lever (17) which is a flat plate type capable of projecting and retracting in the split groove (15) and is pivotally supported by the holding tube (14).
And a retaining ring (20) fitted over the holding tube (14) so as to prevent the pressing lever (17) from rising up. The holding tube (14) is held near the guide wire (11). After being fitted to the portion (11b), the pressing lever (17) is pushed into the recessed groove (15) in a retracted state and rotated, whereby the pressing lever (17) is moved to the guide wire (1).
1) A tool for operating a guide wire for introducing a catheter, which is characterized in that it is crimped and integrated with the surface of 1) so as to prevent relative slipping and displacement, and that the state is restrained by the retaining ring (20). . 2. The retaining ring (20) is shaped into a C-shape with a cutout (21) which matches the split groove (15) of the holding tube (14). Guide wire operation tool for catheter introduction.