JPH0617751U - Catheter guide wire manipulation tool - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to accurately apply the advancing and retracting operation force and the rotating operation force for pushing and pulling up to the distal end portion of the guide wire for introducing a catheter without loss. [Structure] A guide wire (11) is received in a split groove (15) of a holding tube (14), and a push lever (17) is pushed into the split groove (15) in a retracted state so as to rotate. , The pressing lever (17) to the guide wire (1
It was determined that the surface of 1) was pressure-bonded integrally to the surface so that it could not slip relative to the surface and could not be displaced, and that the state was restrained by a retaining ring (20) fitted in the holding tube (14).

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tool for operating a guide wire for introducing a catheter used in an angiographic examination, and more particularly, using the guide wire from the puncture hole of the hip artery or the elbow artery to the aorta, or the primary limb of the aorta, or 2, 3 When inserting into the next limb under selective or super-selective operation, the guide wire can be pushed, pulled, and further rotated securely and safely without loss. It was devised so that it could be done.

[0002]

[Prior art]

 When performing angiographic examination based on DSA or other computer images, a catheter is inserted into the aorta from the puncture hole in the hip artery or the elbow artery, and from that aorta to the primary limb or secondary limb. It is necessary to introduce the contrast agent and inject the contrast agent through the catheter, but since the catheter has an elongated and flexible tube shape, it is pushed forward from the proximal part and its distal end is operated, and the tip part is aorta and its It is impossible to smoothly and safely introduce the correct direction change according to the flexion of various limbs, which means that a catheter without a unique bending shape (so-called bending tendency) at the tip part, It becomes remarkable when performing superselective introduction operation or when operating a very elongated catheter over a long distance from the puncture hole of the elbow artery to various legs of the aorta.

Therefore, conventionally, a guide wire whose tip is bent in a V-shape or a J-shape is also used as an insertion assisting tool for the catheter, and this guide wire is inserted into the hollow inside of the catheter and then the guide wire is inserted. By pushing, pulling, or twisting the wire, the wire is guided to guide the catheter to the target position.

[0004]

[Problems to be solved by the device]

 However, since the guide wire is usually about 0.021 to 0.038 inch in thickness, it is very thin for safety and the surface is smooth, so it is difficult to grasp it stably and firmly. , If the surface of the operator's finger is slipping and slipping, especially if the surface is slightly wet due to the adhesion of water or blood.

Further, the length of the guy wire is usually about 120 to 150 mm, and particularly when used in combination with a catheter for introducing from the puncture hole of the elbow artery into various limbs of the aorta, its extremely thin shape. Therefore, it is necessary to have a high level of skill and abundant experience to correctly and safely and quickly insert the guide wire into the catheter by one person.

[0006] 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. Moreover, there is a risk that the inner wall surface of the blood vessel may be scratched by misdirection.

[0007]

[Means for Solving the Problems]

 In view of these problems, the present invention is suitable not only for the forward / backward operation force of pushing or pulling the guide wire along its longitudinal direction (front-back direction) but also for its rotational operation force (rotation torque). As a manipulation tool for accurately giving it, a holding tube in which split grooves are arranged in a row for receiving the guide wire in the radial direction due to its configuration, and a flat plate type that can appear in and out of the split grooves, and It consists of a pressing lever that is pivotally supported by the holding tube and a retaining ring that is fitted over the holding tube to prevent the pressing lever from floating. Part, then push the lever into the split groove and rotate it to unify the push lever relative to the guide wire surface without slipping or misalignment. Along with the retaining ring, Is characterized in that the defined to bundle.

[0008]

[Action]

 According to the above configuration of the present invention, since the holding tube of the operating tool is provided with the split grooves that can receive the guide wire in the radial direction, the holding tube can be comfortably installed even from the middle of the guide wire. It can be fitted, and there is no need to insert or pull out the long guide wire one by one from the back.

Further, if the holding cylinder is fitted into the proximal portion of the guide wire, and the push lever is pushed into the split groove of the holding cylinder and is rotated, the receiving lever is received in the split groove. The guide wire is crimped and integrated by its pressing lever so that relative idling and displacement cannot occur.

As a result, while firmly gripping the operating tool as a handle grip for operating the guide wire, the guide wire pushes and pulls back and forth without loss up to the tip end, and twisting rotation for changing the direction. An operating force (rotational 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 of the guide wire and the operating tool is maintained by the retaining ring that 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 having a notch that matches the split groove of the holding tube, even if the retaining ring is fitted into the holding tube, The holding tube can be fitted to the guide wire through the notch and the split groove that are in communicative communication, and the pressing lever can be pressed and rotated in order to crimp the guide wire to the holding tube. By rotating the retaining ring to keep the notch and the split groove in a non-matching state, it is possible to prevent the pressing lever from rising, which is extremely convenient for handling and use.

[0012]

【Example】

 Hereinafter, the specific structure of the present invention will be described in detail with reference to the illustrated embodiment. In FIGS. 1 and 2, (10) is a straight angiography without a bent shape (curvature) peculiar to the tip. The 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 or It is designed to be restored and deformed into a peculiar bent shape (curvature).

Then, the guide wire (11) is inserted into the hollow inside of the catheter (10) so that the guide wire (11) can be freely inserted and removed, and the wire (11) is used to guide the catheter (10) as shown in FIGS. Guide smoothly from the puncture hole (12) given to the hip artery or the elbow artery (A) to the aorta (B) and further to the various limbs (C) and (D) derived from the aorta (B). Of.

In that case, it is preferable to insert the guide wire (11) into the catheter (10) and then fit the elastic stopper ring (13) to the straight proximal portion (11b) of the wire (11). . By doing so, the catheter (10) can be prevented from accidentally coming off the guide wire (11), and the tip length (L1) of the wire (11) exposed from the tip of the catheter (10) can be kept constant. This is because it can be held constant.

(G) is a general term for the operation tool of the guide wire (11) according to the present invention, which is a grip for pushing, pulling or rotating the guide wire (11). It functions as a grip handle that is easy to operate, and is configured as shown in FIGS.

That is, (14) is a holding tube for the operating tool (G), which is made of hard synthetic resin or other plastic material so as not to damage the surface of the guide wire (11). It is made in a cylindrical shape of length and thickness, and the split groove (15) for receiving the guide wire that reaches from the circumferential surface to the center is opened, so that the entire front view U It is shaped like a letter.

As is apparent from the figure, the split grooves (15) are arranged in a row over the entire length of the holding tube (14), so that the half-diameter of the middle portion of the guide wire (11). Even from the direction, the holding tube (14) can be fitted into the guide wire (11) and vice versa, which is extremely convenient for handling and using the operating tool (G).

Further, (16) is a parallel groove rail notched in a pair of wall surfaces facing each other which define the dividing groove (15), and this is one end in the longitudinal direction of the holding tube (14). There is a line for cutting a certain length (L2) from one end of it as a port for taking in and out, and the rear part of it is in a blind state.

On the other hand, (17) is a pressing lever that forms a pair with the holding tube (14), and is made of a synthetic resin or other plastic material that is slightly harder than the holding tube (14). It is made in a flat plate type of a size that can be projected and retracted in the groove (15). Reference numeral (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 cylinder (14).

Then, in the assembled state, the pressing lever (17) is pushed into the split groove (15) of the holding tube (14) in the retracted state with the convex member (18) as a fulcrum of the lever action to rotate. The guide wire (11) is pressed down by the ventral surface of the pressure lever (17) which is depressed in the split groove (15), and works together with the holding tube (14). The id wire (11) is clamped and fixed, so that the idling wire (11) and the guide wire (11) can be kept incapable of relative idling or positional deviation.

Reference numeral (19) is a knob for making use of the pushing operation, which is integrally provided upright from the other end of the pressing lever (17) and is always on the circumferential surface of the holding cylinder (14). It is overhanging and exposed. Reference numeral (20) is a retaining ring that prevents the pressing lever (17) from rising, and is slidably fitted onto the circumferential surface of the holding cylinder (14).

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) functions as a stopper of the retaining ring (20), and there is no risk of the operation knob (19) falling off from the other end.

The retaining ring (20) is particularly C-shaped as shown in the drawing, and is provided with a notch (21) on the circumferential surface thereof that can be matched with the split groove (15) of the holding tube (14). Then, by making the notch (21) and the split groove (15) communicate with each other, even if the retaining ring (20) is fitted in the holding cylinder (14), the holding cylinder ( 14) can be fitted in the guide wire (11) in the radial direction, and the push lever (17) can be pushed and rotated with respect to the split groove (15) without any trouble, and then the snap ring ( By rotating 20) to keep the notch (21) and the split groove (15) in a non-matching state, it is possible to reliably prevent the pressing lever (17) from floating.

In the above configuration, when performing an angiographic examination, a guide wire (11) longer than this is inserted into the catheter (10) and the bent tip (11a) is inserted into the catheter (10). While properly exposing the tip end of 10), the operating tool (G) of the present invention is fitted from the same radial direction to the proximal part (11b) of the wire (11) exposed from the catheter (10). At this time, it is preferable that the stopper ring (13) is also fitted from the rear to the proximal portion (11b) of the wire (11) to prevent the backward slipping out.

That is, the holding tube (14) is fitted into the guide wire (11) as shown in FIG. 4 so that the guide wire (11) is received in the split groove (15) of the holding tube (14). The push lever (17) mounted in the groove rail (16) of the holding tube (14) before and after the change is changed from the state shown in FIG. 4 to the state shown in FIGS. ) Is rotated around the fulcrum, and then the retaining ring (20) fitted in the preliminary holding cylinder (14) is slid and rotated to prevent the pressing lever (17) from rising. To restrain.

Then, 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 operation tool (G) or slip. Therefore, the guide wire (11) can be pushed, pulled, or even rotated while gripping the operating tool (G) as a grip handle, thereby pushing the guide wire (11) from the proximal portion (11b). 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.

The guide wire (11) advances the catheter (10) to the target position of the blood vessel under the accurate and loss-free way guide function, and then only the guide wire (11) is extracted. Then, the contrast agent is poured into the remaining catheter (10). Needless to say, the operation tool (G) can be detached from the radial direction of the wire (11) before the guide wire (11) is pulled out.

[0028]

[Effect of device]

 As described above, the operating tool (G) of the guide wire (11) for introducing a catheter according to the present invention is a holding tube () in which split grooves (15) that can receive the guide wire (11) from the radial direction are arranged. 14), 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 the floating of the pressing lever (17). And a retaining ring (20) fitted over the holding tube (14) to prevent the above-mentioned holding tube (14) from being fitted on the proximal portion (11b) of the guide wire (11). By pushing the push lever (17) into the split groove (15) and rotating the push lever (17), the push lever (17) slips and shifts relative to the surface of the guide wire (11). It is impossible to crimp and integrate, and the state is ) Since that is determined so as to restrain a result, an effect of completely improve the problem of the conventional technology mentioned at the outset.

That is, since the holding tube (14) of the operating tool (G) is provided with the split grooves (15) for receiving the guide wire (11) from the radial direction, the holding tube (14) is provided. The guide wire (11) can be easily fitted into or removed from the desired middle part of the guide wire (11), and the guide wire (11) can be inserted or removed one by one from the rear end of the guide wire (11). In particular, it is remarkably convenient for handling a long catheter introduction guide wire (11) and its operability is improved.

Further, as described above, the holding tube (14) is fitted on the proximal portion (11b) of the guide wire (11), and the pressing lever (17) is put into the split groove (15). When the push-pivot operation is performed, the ventral surface of the pressing lever (17) is pressure-bonded integrally with the surface of the guide wire (11) received in the split groove (15), and the operation tool (G ) And the guide wire (11) are prevented from slipping and misaligning each other, so that the catheter (10) can be introduced into a blood vessel even if the catheter (10) does not have an inherent bending shape (curvature). No matter how thin and long the guide wire (11) is, while grasping the operating tool (G) as a stable handle grip, the forward / backward operation force up to the tip (11b) of the guide wire (11), Twist rotation operation force (turn The rolling torque) can be applied without loss, which 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, in particular, 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 it is extremely effective when used as an operating tool (G) for a thin guide wire (11) for selectively and superselectively introducing a different catheter (10).

Furthermore, the fixed state of the guide wire (11) clamped between the holding cylinder (14) and the pressing lever (17) prevents the pressing lever (17) from floating. Since the retaining ring (20) is maintained by the ring (20), there is no fear of loosening the fixed state, but in particular, the retaining ring (20) is made into an overall C-shape, and the retaining tube (14) is provided on the circumferential surface thereof. If a cutout (21) that matches the split groove (15) is provided, the cutout (21) and the split groove (15) are brought into matching communication so that the retaining ring (20) holds the tube (14). Even in the assembled state in which the holding wire is pre-fitted to the holding wire, the holding tube (14) is fitted to the guide wire (11), and the pressing lever against the split groove (15) of the holding tube (14). (17) can be pushed and rotated without hindrance. 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.