JPH05317429A - Oscillating catheter - Google Patents

Abstract

PURPOSE:To obtain an oscillating catheter which is easy to assemble and to operate with a simple construction. CONSTITUTION:This catheter has a multi-channel tube 11 which is made of a soft material and has a plurality of channels peering longitudinally, a rod shaped material 14 which is inserted into at least one channel leaving the tip end part of the channel, a wire 12a which is retained at the tip part of the multi-channel tube and at least one channel into which a fiber scope 13a or the like with a fine diameter is inserted.

Description

Detailed Description of the Invention

[0001]

INDUSTRIAL APPLICABILITY The present invention is capable of changing the observation direction by inserting a scope after inserting a catheter into a region to be observed. Furthermore, a water channel for irrigation water and the like can be added. The present invention also relates to a swinging catheter having a simple structure.

[0002]

2. Description of the Related Art In order to make it possible to swing the tip of a small-diameter fiberscope and to observe a desired direction,
Conventionally, a swing mechanism as shown in FIGS. 13 to 16 has been used.

As shown in FIGS. 13 and 14, a ring body 1 having a ring-shaped ring body 1a and projections 1b provided on one end of the ring-shaped ring body 1a so as to face each other is pin-shaped like a snake toy as shown in FIG. Two wires 3 in a perpendicular direction are slidably attached to the pin 2 so as to be opposed to the outer circumference of the ring body 1, and the tip of the wire 3 is locked to the tip cap 4. When one of the wires 3 is pulled, it bends to the left or right. If the tube 5 is attached to this and the fiberscope 6 is passed through this tube 5, the observation direction can be freely selected.

Further, as shown in FIG. 15, a method of connecting a tube 5 and a tip cap 4 with a spring 7 and arranging a wire 3 and pulling one of them to bend it in an arbitrary direction, As shown in FIG. 16, the shape memory alloy 8 is arranged along the spring 7 to generate electricity to generate heat and shake the head.

[0005]

However, it is difficult to process the parts using the ring body 1 described above, and it is difficult to join the tube and the spring in the method using the spring.
Furthermore, the method of using shape memory alloy is difficult to handle because it uses electricity. Therefore, the tip of a small-diameter fiberscope can be swung so that it can be observed in a desired direction, but its mechanism is complicated and requires skilled personnel to manufacture parts and assemble them. There was an inconvenience.

The present invention has been made in view of the above circumstances, and the rigidity of the flexible multi-channel tube is combined with, for example, an FRP rod-like material to adjust the rigidity of the tube. It is an object of the present invention to provide a swinging catheter which can be easily used with other instruments such as a laser fiber instead of the fiberscope, or can use the fiberscope and the laser fiber at the same time.

[0007]

SUMMARY OF THE INVENTION In a swing catheter according to the present invention, a multi-channel tube made of a flexible material and having a plurality of longitudinally extending channels, and a tube within at least one channel are provided. The problem-solving means is to have a rod-shaped member that is inserted and fixed leaving the tip end portion and a wire that is inserted into at least one channel and whose tip is locked to the tip end portion of the multi-channel tube.

The multi-channel tube is provided with a channel serving as a channel for irrigation water in addition to a channel into which a rod-shaped material, a wire, and a small-diameter fiberscope are inserted. It is also possible to form a perforated hole and use it as a channel. The rod-shaped material in the present invention is a rod-shaped material which is made of a material having a slightly higher rigidity than the material forming the multi-channel tube and which itself has sufficient flexibility and does not expand or contract in its longitudinal direction. , Even if this rod is inserted and fixed in the multi-channel tube,
It does not significantly impair its flexibility. Further, synthetic resin is conveniently used as the multi-channel tube, and FRP is conveniently used as the rod-shaped material.

[0009]

Since the catheter according to the present invention has the above-mentioned structure, when the wire is pulled, one end of the tip is bent and contracted by the inside of the wire. However, the part where the rod is inserted and fixed does not bend because there is little shrinkage. In this case, if the bending rigidity of the scope itself becomes high, it cannot be used as a scope.

[0010]

1 and 2 show an embodiment of a swing catheter according to the present invention, in which reference numeral 11 is made of synthetic resin or the like provided with a plurality of channels in the length direction. It is a flexible multi-channel tube (hereinafter referred to as a tube). At the diametrically opposite ends near the outer circumference of the tube 11, the wire channel 1
2, 12 and working channels 13, 1 at positions near both ends in the diametrical direction intersecting the channels 12, 12 at right angles.
3 is provided.

Wires 12a and 12a are inserted into the wire channel 12, and the ends of these wires 12a are caps 11a provided at the ends of the tube 11.
Is locked to. Further, a rod-shaped member 14 made of FRP or the like is inserted into and bonded to one of the working channels 13, leaving the tip of the tube 11 at 2 to 5 cm, and a fiberscope 13a is inserted into the other working channel 13. .. When one of the wires 12a is pulled, only the tip of the tube 11 bends in the direction of the pulled wire 12a and the observation direction of the fiberscope 13a changes.

3 to 5 show another embodiment of the present invention, in which the rod-shaped member to be inserted into the working channel 13 of the tube 11 has a cylindrical cross section.
A continuous hole 15 is formed in the working channel 13 as a, a cross shape 14b, a flat shape 14c, etc., in the length direction different from this. The continuous hole 15 serves as a working channel 15 ', which can be filled with a liquid,
It can be used as a DDS by injecting physiological saline for reflash or by injecting a drug or the like. , It can also be used as a working channel for other uses. In this case, physiological saline is injected by the injector 16 as shown in FIG.

As described above, in the swing catheter according to the present invention, the degree of contraction near the distal end portion is changed by the insertion of the rod-shaped member, and the distal end direction is changed by the wire operation. The numbers of the wire channels 12 and the working channels 13 may be appropriately provided in the tube 11 as necessary.

For example, by providing four wire channels 12 as shown in FIG. 7 and engaging with the cap 11a through the wires 12a, the tip of the tube can be swung in all directions. Also working channel 1 in the center
A rod-shaped member 14 is inserted in 3, and the four working channels around it can be used respectively for a fiberscope, a laser fiber, and a irrigation water channel. Further, as shown in FIG. 8, one working channel 13 is formed in the center, and a cylindrical rod-shaped member 14a is inserted into this to form a working channel 15 ', or as shown in FIG. 9, a wire channel and a working channel. As shown in FIG. 10, a rod-shaped member 14 having a cross section extending at intervals of approximately 120 ° from the center is inserted and fitted into one working channel 13 as shown in FIG. A fiberscope may be inserted into the working channel 15 'composed of the continuous hole 15 formed by the working channel 13 or used as a channel for irrigation water. Further, as shown in FIG. 11, it is conceivable that a working channel is provided in the center of the tube, and the rod-shaped member 14 is inserted and fitted therein.

As shown in FIG. 12, in each of the swing catheters according to the present invention, the tip of the tube 11 is swung by the operation of the wire operating tool 17, and the working channel 13 of the tube 11 is passed through the check valve 18. The attached fiberscope 13a is inserted, and physiological saline or the like is injected by the injector 16.

[0016]

As described above, the swing catheter according to the present invention has a simple structure and low cost. Since it is mechanically configured, there are few failures. The diameter of the catheter can be reduced, and insertion observation and laser treatment can be performed on an extremely small area. By deforming the cross section of the rod-shaped member, the working channel is used as the FRP insertion channel, and the working channel and the rod-shaped member form separate working channels. When inserting a fiberscope, the visual field direction can be easily changed. Since it has a catheter shape, it is possible to change not only the visual field direction of the scope but also the insertion direction. There are advantages that the number of working channels is increased, a fiberscope, a laser fiber, etc. can be used at the same time, and the number of wire channels is increased, which allows fine adjustment of the swinging of the tip of the tube.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a swing catheter according to the present invention.

FIG. 2 is a sectional view taken along the line II-II of FIG.

FIG. 3 is a transverse cross-sectional view of a swing catheter using a cylindrical rod-shaped member.

FIG. 4 is a cross-sectional view of a swinging catheter using a cross-shaped rod-shaped member.

FIG. 5 is a transverse cross-sectional view of a swinging catheter using a flat rod-shaped member.

FIG. 6 is a side view of a swing catheter with a wire and a syringe for saline.

FIG. 7 is a cross-sectional view of a swing catheter having a working channel having a FRP inserted in the center and four wire channels and four working channels respectively.

FIG. 8 is a cross-sectional view of a swinging catheter in which a cylindrical rod-shaped member is attached to a tube having one working channel.

FIG. 9 is a transverse cross-sectional view of a swing catheter having three wire channels and three working channels.

FIG. 10 is a cross-sectional view of a swing catheter in which one working channel is arranged in the center and a rod-shaped member is inserted into the working channel to form a plurality of working channels.

FIG. 11 is a cross-sectional view of a swing catheter having a FRP channel formed in the center.

FIG. 12 is a side view of a catheter provided with a swinging machine using a wire and a fiberscope liquid injector.

FIG. 13 is a side view of a conventional swing catheter using an annulus.

FIG. 14 is a perspective view of a ring body.

FIG. 15 is a side view of a conventional swing catheter in which tubes are connected by springs.

FIG. 16 is a side view of a conventional swing catheter using a shape memory alloy.

[Explanation of symbols]

11 ... Multi-channel tube (tube), 12 ...
Wire channel, 12a ... Wire, 13 ... Working channel, 13a ... Fiberscope, 14 ... Rod, 15 ... Continuous hole, 15 '... Working channel

Front Page Continuation (72) Inventor Kazuo Sanada 1440 Rokuzaki, Sakura City, Chiba Fujikura Electric Cable Co., Ltd. Sakura Factory

Claims (3)

[Claims] 1. A multi-channel tube made of a flexible material and having a plurality of channels penetrating in a lengthwise direction, and a rod-shaped member inserted and fixed in at least one channel while leaving a tip of the channel. At least 1
A swinging catheter having a wire inserted into one channel and having a tip locked to the tip of the multi-channel tube. 2. The multi-channel tube is provided with a working channel serving as a channel for irrigation water.
The described swing catheter. 3. The swing catheter according to claim 1, wherein a continuous hole in the longitudinal direction is separately formed in the channel through which the rod-shaped member is inserted, and this hole is used as a separate working channel.