JPH06125866A - Operating implement of catheter - Google Patents

Abstract

PURPOSE:To improve operability and to simplify adjustment of tension of a wire by providing a detaining part of the wire for turning the wire provided along the longitudinal direction of the catheter to the diameter direction of the catheter and a reel part to which its wire is wound round, and an operating dial. CONSTITUTION:At the time of curving the tip part 103 of a catheter main body 101, an operating dial 7 is rotated. A fixing screw 10 turns around a hollow shaft 6 so as to go away from a through hole 62 of the hollow shaft 6, and on the other hand, a fixing screw 11 turns around the hollow shaft 6 so as to draw near the through hole 62. A wire 120 whose base end is fixed to the fixing screw 10 is drawn and wound round to a reel part 61, and also, a wire 130 whose base end is fixed to the fixing screw 11 is transferred out. The wire 120 is drawn, the wire 130 is relaxed, and the tip part 103 of the catheter main body 101 is curved. In this regard, when the wire 130 is relaxed, tension returns again to the wire 130 by rotating and moving the fixing screw 11 in the prescribed direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a catheter manipulating tool for bending a tip portion of a catheter constituting an endoscope by pulling a wire.

[0002]

2. Description of the Related Art An endoscope is inserted from the outside of the body to observe inside the body cavity such as digestive system, bronchial system, blood vessel, bile duct, urethral duct, tubular organ such as uterus, and further to the inner wall thereof. Since medical treatments such as administration of the drug solution and laser beam irradiation can be performed, attention has been paid in recent years and its development has been advanced.

When observing the inside of a body cavity using such an endoscope, the endoscope is used in order to make the distal end portion of the endoscope reach a target site, or to select and change the visual field in observation. It is necessary to bend (or bend) the tip of the catheter that constitutes the mirror.

As a method of bending the distal end of the catheter from the external position, the distal end of the catheter is constructed by sequentially connecting a plurality of node rings in a rotatable manner, a wire is disposed inside the catheter, and the distal end thereof is connected to the catheter. There is a method in which the wire is fixed near the distal end of the catheter and the wire is pulled from the proximal end by an operating tool attached to the proximal end of the catheter to bend the distal end of the catheter in a desired direction (Japanese Patent Publication No. 60-
No. 21734, No. 62-23442, No. 62
23447). In addition, recently, in response to a request for reducing the diameter of an endoscope, a catheter tube having a structure without a node ring has been proposed. Even in this catheter, the tip of the catheter is bent by similarly pulling the wire. (Japanese Patent Laid-Open No. 2-1292).

Here, as an operation tool for bending the distal end portion of the catheter by pulling the wire, the proximal end portion of the wire is made coaxial with the angle dial by rotating the angle dial (or bending operation knob). There is known a structure in which a wire is pulled around a fixed pulley (Japanese Utility Model Publication No. 62-23442 and Japanese Utility Model Publication No. 62-23447), but such an operating tool is a pulley for winding the wire inside. Since it requires a space to install, and the angle dial (or bending operation knob) projects to the outer periphery of the operation tool,
There is a drawback that the operating tool becomes large and inconvenient to handle and store.

In order to solve such a drawback, a cylindrical collar installed on the outer periphery of the housing so as to be able to rotate coaxially with the catheter and an inner peripheral portion of this collar are screwed together to form a proximal end of the wire. Has a fixed movable member,
An operating tool is known in which a movable member moves in the axial direction of a catheter to pull a wire by rotating a collar in a predetermined direction (US Pat. No. 5,030,204).
issue).

However, with this operating tool, only one wire can be pulled, and therefore the bending direction of the catheter tip is limited to one direction. In addition, since the moving amount of the movable member is small relative to the rotation amount (rotation angle) of the collar, the responsiveness of the bending of the catheter tip portion to the rotating operation of the collar is poor, and the catheter tip portion is bent immediately or at a large angle. It is disadvantageous to bend it.

Further, there is disclosed an operating tool having a structure in which one of the two wires is pulled by the rotation of the operating ring and at the same time the other wire is loosened.
No. 7281), with this operation tool, an operation ring, a cam cylinder,
A pair of sliders, a pair of pins that abut the cam surface of the cam barrel,
There are drawbacks in that many components such as a joining member between the operation ring and the cam barrel are required and the structure is complicated.

Further, when the wire is stretched and relaxed due to frequent bending operations, a desired bending angle cannot be obtained at the tip of the catheter. Therefore, it is necessary to adjust the tension of the wire again. With each operating tool, is it possible to readjust such a loose wire?
Or the operation tool had to be disassembled.

[0010]

SUMMARY OF THE INVENTION An object of the present invention is to provide a catheter manipulating tool having a simple structure, excellent operability, and capable of easily adjusting the wire tension.

[0011]

This object is achieved by the present invention described in (1) below. Also, the following (2)
It is preferably from (14) to (14).

(1) The distal end of at least one wire is fixed to the proximal end of a catheter,
An operating tool for pulling the wire to bend the distal end portion of the catheter, wherein the operating tool has a grip portion and a bending operation portion, and the bending operation portion is connected to the grip portion. An operation portion main body, a wire locking portion that is arranged along the longitudinal direction of the catheter and that directs the wire in the radial direction of the catheter, and a reel portion that winds the wire that is oriented in the radial direction of the catheter, An operation dial installed rotatably around the axis of the catheter with respect to the operation unit main body, and a fixing means for fixing the proximal end of the wire wound around the reel unit to the operation dial. A catheter operation tool.

(2) The catheter manipulator according to (1), wherein the reel portion is formed on the outer periphery of the annular member.

(3) The catheter operating tool according to (2), wherein the engaging portion is a through hole formed in the outer peripheral portion of the annular member.

(4) The catheter is provided with two wires facing each other via the central axis of the catheter,
The catheter operating tool according to any one of (1) to (3) above, wherein the respective wires are wound around the reel portion in opposite directions.

(5) The reel portion is made of a low-friction material having excellent wear resistance.
A catheter operation tool according to any one of 1.

(6) The catheter manipulator according to any one of the above (1) to (5), wherein the fixing means includes a tension adjusting mechanism for adjusting the tension of the wire.

(7) The catheter manipulating tool according to (6), wherein the tension of the wire is adjusted by the tension adjusting mechanism from the outside of the operation dial.

(8) The operating tool for a catheter according to any one of the above (1) to (7), which has a rotation angle restricting means for restricting a rotation angle of the operation dial.

(9) The catheter operating tool according to any one of the above (1) to (8), which has a locking means for locking the rotation of the operation dial.

(10) The lock means includes a braking member installed between the operation portion main body and the operation dial,
The catheter operation tool according to (9) above, which comprises an urging means for pressing the operation dial against the braking member.

(11) The catheter operating tool according to any one of the above (1) to (10), wherein the gripping portion is formed at an end of the bending operating portion opposite to the catheter.

(12) The catheter operating tool according to any one of (1) to (11) above, wherein the grip portion and the bending operation portion are separably connected to each other.

(13) The catheter manipulator according to any one of (1) to (12) above, which constitutes an endoscope.

(14) The above-mentioned (1) to (13), wherein a fiberscope insertion portion is formed at the end of the grip portion.
A catheter operation tool according to any one of 1.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The catheter operating tool of the present invention will be described in detail below with reference to the preferred embodiments shown in the accompanying drawings. Figure 1
FIG. 2 is a plan view showing a configuration example of a catheter operating tool of the present invention, FIG. 2 is an enlarged sectional view taken along line II-II in FIG.
[Fig. 2] is a vertical sectional view of the operating tool shown in Fig. 1. In addition, in the following description, the right side in FIGS.
The left side is called the "tip".

The catheter 100 shown in FIG. 1 constitutes an endoscope and has a catheter body 101. The proximal end of the catheter body 101 (right side in FIG. 1)
A catheter operation tool (hereinafter, simply referred to as “operation tool”) 1 of the present invention, which will be described later, is attached to the device 102.

The catheter body 101 is made of a flexible material such as polyvinyl chloride, polyurethane, polyethylene, polypropylene, polyamide, polytetrafluoroethylene, silicone rubber, and ethylene-vinyl acetate copolymer. There is. In particular, the distal end portion 103 of the catheter body 101 has a wire 1 which will be described later by appropriately selecting the above-mentioned material and the diameter of the catheter body 101.
It has such flexibility that it can be easily bent when it is pulled by 20 and 130.

Although not shown, the catheter body 10
By embedding or coating a reinforcing member made of a resin such as hard polyurethane or polyimide or a metal such as a coil spring in a portion excluding the distal end portion 103 of 1, the rigidity of the portion of the catheter body 101 other than the distal end portion 103 is increased. Part 1
It can be increased compared to 03.

Since the catheter 100 is usually used by being inserted and left in the living body under fluoroscopy, it is preferable to impart X-ray contrast property to the catheter body 101, that is, the catheter body. X in 101 constituent materials
It is preferable to include a line contrast agent. Examples of the X-ray contrast agent include metals such as platinum, silver, tungsten, barium sulfate and bismuth oxide, and metal compounds.

The catheter body 101 is formed with various lumens having different uses and functions as described below. That is, as shown in FIG. 2, the catheter body 1
In 01, four first to fourth lumens 104, 105, 106 and 107 are formed over substantially the entire length thereof.

The first lumen 104 accommodates an optical fiber bundle 108 as an observing instrument (fiberscope) for observing the inside of a body cavity such as a blood vessel or a tubular organ. The optical fiber bundle 108 can also be used for medical treatment such as irradiation of a laser beam to a blood vessel or an inner wall of a tubular organ.

As shown in FIG. 2, the optical fiber bundle 108 is composed of a light transmitting fiber (light guide) 109 and a light receiving fiber (image fiber) 110.
It is made into a bundle by being hardened with acrylic, silicone rubber or the like. Incidentally, the light-transmitting and light-receiving fibers 109, 1
Each of 10 is made of an optical fiber such as quartz, plastic, or multi-component glass.

At the tip of the optical fiber bundle 108,
A lens (not shown) is attached, and the lens is located near the tip opening of the first lumen 104. The optical fiber bundle 108 may be installed in the first lumen 104 so as to be movable in the axial direction of the catheter body 101. In this case, the catheter body 101
The protruding length of the optical fiber bundle 108 from the tip of the can be adjusted. At this time, the optical fiber bundle 108 is moved and fixed by operating the valve cap 27, which will be described later.

The second lumen 105 is the main body 1 of the catheter.
The fluid can be injected into the body cavity or the like through the opening to the distal end of 01, or the fluid can be sucked from the body cavity or the like. Specifically, the second lumen 105 is used to administer a drug solution or the like into a body cavity such as a blood vessel in which the catheter 100 is inserted or left, or when observing the inside of the blood vessel with an endoscope, A transparent liquid (for example, saline solution, glucose solution) for pushing out blood etc. that obstructs visibility
It is used as a flash channel for injecting.
The second lumen 105 can also be used as a medical treatment instrument insertion channel for inserting a medical treatment instrument as described below.

Third lumen 106 and fourth lumen 1
07 is the tip portion 10 of the catheter body 101.
It is for accommodating the wires 120 and 130 for pulling the tip of the catheter body 2 to bend the catheter 3. Third lumen 106 and fourth lumen 107
Are formed on the cross section of the catheter body 101 at positions facing each other via the central axis of the catheter body.

The tip openings of the lumens 106 and 107 are sealed with, for example, a filler, and the filler allows the tips of both wires 120 and 130 to be located at the tip of the catheter body 101 on the cross section of the catheter body. Are fixed at positions facing each other via the central axis of the catheter body. Thereby, one wire 120
When the wire is pulled, the tip 103 bends in the direction in which the wire tip is fixed (upward in the figure), and the other wire 1
When 30 is pulled, the tip portion 103 bends in the direction in which the tip of the wire is fixed (downward in the figure).

With the bending of the distal end portion 103, the distal end portion of the optical fiber bundle 108 in the first lumen 104 is curved, so that the inner surface of the body cavity such as the blood vessel in which the catheter 100 is inserted can be observed or medical treatment can be performed. In the present specification, “curvature” means that the catheter body 101 is bent, that is, bent in a linear shape having one step or two or more steps.
Alternatively, it is a concept including continuous curving.

The wires 120 and 130 have a tensile strength that does not cause disconnection due to a pulling operation described later, and the constituent materials thereof are, for example, stainless steel, piano wire, superelastic alloy, and amorphous alloy. Metals such as, aromatic polyamides, aliphatic polyamides, polyesters such as polyarylate and polyethylene terephthalate, various resins such as polyimide, single wires and fiber bundles made of carbon fibers, and twisted yarns.

The preferred diameter of the wires 120 and 130 depends on the material thereof, but is preferably 30 to 500 μm, more preferably 100 to 300 μm in the case of a fiber bundle of polyarylate, and stainless wire. In this case, it is preferably about 10 to 200 μm.

The tip portion 10 of the catheter body 101
Even if there is one or more expanders (not shown) such as balloons that can be expanded by injecting a working fluid near 3 in the vicinity of the curved point of the distal end portion 103, Good. In this case, the catheter body 101 has a fifth portion communicating with the dilatation body in order to send a working fluid to the dilatation body.
A lumen (not shown) is formed.

The proximal end portion 10 of such a catheter 100
The operation tool 1 of the present invention is attached to the device 2. The operating tool 1 includes a bending operation portion 2 and a grip portion 15.
By gripping the grip portion 15 and operating the bending operation portion 2, the distal end portion 103 of the catheter body 101 can be remotely curved.

The bending operation section 2 mainly includes an operation section main body 3, which is composed of a tubular manifold 4 and a holder 5, a hollow shaft (annular member) 6, an operation dial 7, a locking means 8, and a rotation angle regulating means 9. And the wire base end fixing means (fixing screws 10 and 11). Hereinafter, these configurations will be sequentially described with reference to FIG.

The proximal end portion 102 of the catheter body is inserted and fixed in the manifold 4, and in this state, the manifold 4 is inserted in the holder 5 and the hollow shaft 6.
The tip of the hollow shaft 6 is inserted into the holder 5,
It is fixed to the holder 5 with screws 51. The manifold 4 is fixed to the holder 5 with a set screw 41, and when the set screw 41 is loosened, the manifold 4 can rotate in the holder 5 and the hollow shaft 6 and can move in the axial direction of the catheter body 101 (left and right direction in FIG. 3). . It should be noted that the manifold 4 may be configured to have a rectangular cross-section, or a member such as a key may be used so as not to rotate in the holder 5 and the hollow shaft 6.

A groove is formed on the outer circumference of the hollow shaft 6 on the base end side along the circumferential direction thereof. The groove forms a reel portion 61 around which the wires 120 and 130 are wound. The hollow shaft 6 is provided below the reel portion 61 in FIG.
Through holes 62 are formed so as to penetrate the inside and the outside. The through hole 62 functions as a wire locking portion that inserts the wires 120 and 130 arranged along the longitudinal direction of the catheter body 101 and directs the wires in the radial direction of the catheter body 101.

The wires 120 and 130 whose directions are changed by the locking portions (through holes 62) are wound around the reel portion 61, respectively. This winding direction is
As shown, the hollow shaft 6 is in the circumferential direction of the cross section,
This direction is not strict and the wires 120, 13
The configuration may be such that 0 is wound around the reel portion 61 while being slightly displaced in the longitudinal direction of the tube body 101. In the case of the configuration shown in the drawing, the cross-sectional shape of the groove forming the reel portion 61 is a quadrangle, but the shape is not limited to this, and for example, V
It may be letter-shaped or arc-shaped.

In the present invention, the reel portion is not limited to the one formed on the outer peripheral surface of the hollow shaft 6 as shown in the drawing. For example, the outer peripheral surface of the hollow shaft 6 on the base end side may not be formed, and the outer peripheral surface of the base end portion of the hollow shaft 6 may be the reel portion. It may be the surface or the outer peripheral surface of the connection tubes 20 and 24. Further, the reel portion is composed of a plurality of hooks (not shown) provided along the circumferential direction of the tube body 101 inside the holder 5 or the like, and these hooks move the wires 120 and 130 in the circumferential direction. It may be arranged so as to be curved.

The locking portion for locking the wires 120 and 130 is a through hole 6 formed in the hollow shaft 6 as shown in the figure.
The number is not limited to 2, and may be, for example, a hook, a pulley, or a round bar provided on the outside of the catheter body 101. Also,
Wires 120 and 13 whose direction is changed by the locking portion
0 indicates the circumferential direction of the cross section of the hollow shaft 6 as shown.

Material of hollow shaft 6, especially material of reel portion 61
As for friction due to sliding with the wires 120, 130
The resistance is relatively small, and the wire 120, 130
It is preferable that there is little wear due to sliding.
Stainless steel, aluminum, titanium, white metal, copper
Metals such as alloys and aluminum alloys, hard polyvinyl chloride
, Polyethylene, polypropylene, polystyrene,
Li- (4-methylpentene-1), polyethylene telef
Polyester such as talate, polycarbonate, acrylic
Resin, acrylonitrile-butadiene-styrene copolymer
Coalesced, aromatic or aliphatic polyamide (nylon),
Litetrafluoroethylene, polyacetal, melamine
Such as resin, various glasses, ceramics such as alumina, silica, etc.
Cousses and the like.

An operation dial 7 is provided on the outer periphery of the hollow shaft 6.
The operation unit body 3 and the hollow shaft 6 are rotatably installed. The operation dial 7 is rotatable concentrically with the hollow shaft 6 in both forward and reverse directions.

At the base end of the operation dial 7, screw parts 71 and 72 to which fixing screws 10 and 11 to be described later are respectively engaged.
Are formed. In addition, in FIG. 3, a cross section of one screw portion 71 is shown for easy understanding.

Locking means 8 is provided at the tip of the operation dial 7. The locking means 8 rotates the operation dial 7 with respect to the operation portion main body 3 by a predetermined angle, and when the wire is pulled, holds the rotation angle as it is and maintains the curved state of the distal end portion 103 of the catheter main body 101. A ring-shaped braking member 81 installed between the tip of the operation dial 7 and the base end of the holder 5, one end of which is locked to the rib 63 of the hollow shaft 6 and the other end of which is the operation dial. 7 and a spring 82 that locks the operation dial 7 in the distal direction by being locked to the inner peripheral portion of the operation dial 7.

The braking member 81 is made of an elastic material such as various rubbers such as silicone rubber, nitrile rubber and butyl rubber, and thermoplastic elastomer such as polyurethane. The operation dial 7 is biased toward the tip by a spring 82, its tip is pressed toward the braking member 81, and its rotation is locked by a frictional force generated between the tip surface of the operation dial 7 and the braking member 81. . This locked state is maintained until the operation dial 7 is rotated again.

The locking means 8 is not limited to the one having such a structure, and for example, only the braking member 81 is used.
The spring 82 may be omitted, a ratchet may be used, the rotation of the operation dial 7 may be directly stopped by a stopper, and such a locking means may be omitted.

The rotation angle regulating means 9 has the maximum rotation angle (rotation angle range) of the operation dial 7, that is, the wire 12.
It controls the maximum pulling length of 0 and 130,
It is composed of a pin 91 which is erected in the radial direction of the operation dial 7 in a groove 73 formed at the tip of the operation dial 7, and a pin 92 which is erected in the holder axial direction on the outer periphery of the base end of the holder 5. ing. The rotation angle of the operation dial 7 is increased, and the operation dial 7 is rotated counterclockwise or clockwise, for example, 180 degrees.
When rotated, both pins 91 and 92 are locked and the operation dial 7 stops rotating.

Therefore, when the maximum rotation angle of the operation dial 7 in one direction is 180 °, the standing positions of the pins 91 and 92 in the circumferential direction should be opposed to each other via the rotation center of the operation dial 7. The operation dial 7
The maximum rotation angle of can be obtained. Further, when the maximum rotation angle of the operation dial 7 is set to less than 180 ° clockwise or counterclockwise, the number of pins 91 and 92 installed is increased or the pins 91 and 92 are erected in accordance with the regulated rotation angle. Adjust the position.

By providing the rotation angle regulating means 9 as described above, the maximum bending angle of the distal end portion 103 of the catheter body can be made constant, and the fiber scope is damaged due to excessive bending of the distal end portion 103, and the wire 1
It is possible to prevent breakage due to excessive pulling of 20, 130.

The rotation angle restricting means 9 is not limited to the one having such a structure, and for example, the depth of the groove 73 is changed,
The one that regulates the rotation angle by locking the step and the pin 92, the one that inserts and fixes an arc-shaped member in the groove 73, and the pin 92 is locked to this member to regulate the rotation angle, or Alternatively, protrusions formed on the outside of the operation dial 7 and the holder 5 may be engaged with each other to regulate the rotation angle (neither is shown). May be.

FIG. 4 is a sectional view taken along line IV-IV in FIG. 3 (in the figure, the connection tubes 20 and 24 are omitted). As shown in the figure, the screw portions 71 and 7 of the operation dial 7
Hollow fixing screws 10 and 11 which are fixing means for fixing the base end portions of the wires 120 and 130 wound around the reel portion 61 are screwed onto the screw 2, respectively.

Third lumen 106 and fourth lumen 1
Wires 120 and 130 exposed from the inside of 07 to the outside of the catheter main body 101 are guided from the inside of the hollow shaft 6 through the through hole 62 to the outer peripheral portion of the hollow shaft 6, and
Oriented in the radial direction. And the wires 120, 13
4 are wound from the through hole 62 to the left and right in FIG. 4, wound around the opposing outer peripheral surfaces of the reel portion 61 in opposite directions, and further inserted into the hollow portions of the fixing screws 10 and 11, respectively. , 130 are fixed to the heads of the fixing screws 10 and 11. Such a figure 4
Hereinafter, the state shown in FIG.

The fixing screws 10 and 11 which are fixing means are provided with a tension adjusting mechanism for adjusting the tension of the wires 120 and 130, respectively. That is, the fixing screws 10 and 11
By rotating each of them in a predetermined direction and adjusting their axial position with respect to the operation dial 7,
The tension of 0, 130 can be adjusted.

In the present invention, the fixing means typified by the fixing screws 10 and 11 may not have the wire tension adjusting mechanism, and the operating tool does not have the tension adjusting mechanism itself. May be

A grip portion 15 is attached to the base end of the bending operation portion 2 as described above. That is, the grip 15
The proximal end of the hollow shaft 6 is inserted into the distal end of the body 16 of
The grip body 16 and the hollow shaft 6 are detachably connected and fixed by a set screw 161.

As described above, since the operation tool 1 has the construction in which the bending operation portion 2 and the grip portion 15 are separably connected,
Winding the wires 120 and 130 around the reel portion and fixing the base end thereof, and connecting tubes 20 and 24 described later,
Assembling of the catheter 100 and the operating tool 1 is facilitated by easy connection with the corresponding connectors 18 and 25.

The grip portion main body 16 has a branch portion 17 that branches so as to project obliquely upward in FIG. 1. A connector 18 is fitted to the base end of the branch portion 17, and the connector 18 further comprises: It is fixed by a connector fixing member 19 which is screwed to the base end of the branch portion 17. The distal end of the connector 18 and the proximal end of the second lumen 105 of the catheter body 101 are connected by a connection tube 20.

The connector 18 is a so-called luer taper connector having an inner surface formed in a taper shape, and a three-way stopcock (not shown), the tip of a syringe, or the like can be liquid-tightly connected. For example, the tip of a syringe is connected to the connector 18, and the liquid in the syringe is supplied into the second lumen 105 via the connector 18 and the connection tube 20.
Further, from the connector 18, for example, forceps or a medical treatment instrument such as probes emitting ultrasonic waves, microwaves, high frequencies, electric currents, electro-hydraulic shock waves, etc. can be inserted.

A fiberscope insertion port 21 is formed at the base end of the grip body 16, and a connector 22 is fitted in the fiberscope insertion port 21. Further, the connector 22 is fixed by a connector fixing member 23 that is screwed to the base end of the grip body 16. The distal end of the connector 22 and the proximal end of the first lumen 104 of the catheter body 101 are connected by a connection tube 24.

In addition, a hollow optical fiber fixing member 25 made of an elastic material such as silicone rubber and a cover 26 thereof are fitted in the connector 22, and the base end of the connector 22 is further fitted. The hollow valve cap 27 is screwed.

As shown in FIG. 3, the optical fiber bundle 1
08 is inserted into the optical fiber fixing member 25, the cover 26 and the valve cap 27, the valve cap 27 is rotated and its tip is screwed into the connector 22, and the tip surface 28 of the valve cap 27 is covered. 26 and the optical fiber fixing member 25 are pressed, the optical fiber fixing member 25 is deformed, and the hollow portion of the optical fiber fixing member 25 is closed. As a result, the optical fiber bundle 108 inserted through the hollow portion is fixed so as not to move in the axial direction. Such fixing of the optical fiber bundle 108 is
This is performed after the axial position of the optical fiber bundle 108 is adjusted as desired.

In such an operating tool 1, a scale (not shown) indicating the amount of rotation of the operation dial 7 is provided on the operation dial 7, the holder 5 or the grip body 16 and the pulling length of the wires 120 and 130 is set. , The tip 10
The degree of bending (angle) of 3 can be known. Further, in the present invention, the positional relationship between the bending operation portion and the grip portion is not limited to that shown in the figure, and for example, the grip portion may exist on the distal end side or the side of the bending operation portion.

Next, the method of use and the operation of the operation tool 1 shown will be described. While holding the grip portion 15, the operation dial 7 of the bending operation portion 2 is rotated in a predetermined direction to bend the distal end portion 103 of the catheter body 101.

First, when the distal end portion 103 of the catheter body 101 is bent downward in FIG. 1 as shown in FIG. 1, the operation dial 7 is moved from the basic position shown in FIG. 4 to that shown in FIG. Rotate clockwise. As a result, the fixing screw 10 rotates around the hollow shaft 6 so as to move away from the through hole 62 of the hollow shaft 6, while the fixing screw 11 rotates around the hollow shaft 6 so as to approach the through hole 62. Along with this, the wire 120 whose base end is fixed to the fixing screw 10 is pulled and wound around the reel portion 61, and the wire 130 whose base end is fixed to the fixing screw 11 is paid out. Therefore, one wire 120 is connected to the third lumen 1 through the through hole 60.
Is pulled to the proximal side of the catheter body in 06, and the other wire 130 is relaxed in the fourth lumen 107.
The tip portion 103 of the catheter body 101 is curved downward in FIG.

According to the same principle, the operation dial 7 is set to the position shown in FIG.
5 is rotated counterclockwise in FIG. 5, the wire 130 is pulled to the catheter body proximal end side in the fourth lumen 107, and the wire 120 is pulled in the third lumen 106. Pushed to the tip side,
The tip portion 103 of the catheter body 101 is curved upward in FIG.

The rotation angle of the operation dial 7 is the wire 1
Since it corresponds to the pulling movement amount of 20, 130, the degree of bending (angle) of the tip portion 103 can be adjusted as desired by appropriately adjusting the rotation angle of the operation dial 7.

The rotation angle of the operation dial 7 is held by the lock means 8 described above, and the catheter body 10
The curved state of the tip portion 103 of No. 1 is maintained as it is. Further, since the rotation angle range of the operation dial 7 is regulated by the rotation angle regulation means 9 described above, damage to the fiberscope due to excessive bending of the tip portion 103 and breakage due to excessive pulling of the wires 120 and 130 are prevented. be able to.

The rotation angle range of the operation dial 7 is
Generally, it is preferably within ± 180 ° with respect to the basic position state, more preferably within ± 120 °, and even more preferably within ± 90 °.

As described above, the operation tool having a structure in which the change in the winding length of the wires 120 and 130 around the reel portion 61 due to the rotation of the operation dial 7 corresponds to the axial movement amount of the wires 120 and 130. Then wire 12
The degree of traction of 0, 130, that is, the degree (angle) of bending of the tip 103 can be adjusted quickly and accurately,
Excellent operability.

When the bending operation of the tip portion 103 is repeated, the wires 120 and 130 are loosened, and depending on the degree, the desired bending angle of the tip portion 103 cannot be obtained even if the operation dial 7 is rotated. There is. In this case,
The tension of the wires 120 and 130 is adjusted as follows.

For example, when the wire 130 is loosened, for example, a screwdriver is used to rotate the fixing screw 11 in a predetermined direction to move it upward in FIG. This allows
The tension is restored to the pulling wire 130, and the relaxation of the wire 25 can be removed. Even when the wire 120 is loosened, the fixing screw 10 is adjusted in the same manner,
Relaxation can be removed.

In the illustrated operation tool 1, the wires 120, 1
Since the fixed position of the base end of 30 to the operation dial 7 is the outer surface of the bending operation portion 2, it is possible to easily adjust the tension of the wire, and the wire is relaxed after the operation tool 1 is assembled, particularly during use. Even at this time, the tension of the wire can be easily adjusted in a short time without disassembling the operation tool 1.

Although the catheter operating tool of the present invention has been described above based on the configuration example shown in the drawings, the present invention is not limited to this. For example, as a fixing means of the wire base end, the fixing screws 10 and 11 are one fixing screw (fixing member), and both wires 120 are fixed to the fixing screw.
The base ends of 130 may be fixed to each other, or may not be fixed by such fixing screws.

Further, in the above, the two wires 120,
Although the operating tool applied to the catheter 100 having the 130 has been described, the number of wires is not limited to this, and
There may be one or three or more, and the arrangement thereof is not particularly limited. For example, in the case of a catheter in which four wires are arranged at 90 ° intervals in the circumferential direction of the cross section of the catheter body in order to bend the catheter tip in four directions, all wires are operated by one operation dial. Alternatively, the bending operation section may be replaced with the same 2
Two operation dials are provided. One operation dial (vertical bending operation dial) operates a pair of wires facing each other via the catheter body shaft, and the other operation dial (horizontal bending operation dial) operates the remaining wires. It is possible to employ a configuration in which a pair of wires (which are at positions displaced by 90 ° with respect to the pair of wires) are operated.

[0083]

As described above, according to the catheter operating tool of the present invention, it is possible to perform a bending operation with a small size and a simple structure and excellent operability. Furthermore, in the present invention, since the tension adjusting mechanism for adjusting the tension of the wire can be provided outside the operation tool,
When the wire is loosened during initial setting or during use, the tension of the wire can be easily adjusted without disassembling the operation tool.

[Brief description of drawings]

FIG. 1 is a plan view showing a configuration example of a catheter operating tool of the present invention.

FIG. 2 is an enlarged sectional view taken along line II-II in FIG.

3 is a vertical cross-sectional view of the operation tool shown in FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG. 3 (basic position state).
Is.

5 is a sectional view taken along line IV-IV in FIG. 3 (during an operation dial rotation operation).

FIG. 6 is a sectional view taken along line IV-IV in FIG. 3 (when adjusting the tension of the wire).

[Explanation of symbols]

 1 Operation Tool 2 Bending Operation Section 3 Operation Section Main Body 4 Manifold 41 Set Screw 5 Holder 51 Set Screw 6 Hollow Shaft 61 Reel Part 62 Through Hole 63 Rib 7 Operation Dial 71, 72 Screw Part 73 Groove 8 Locking Means 81 Braking Member 82 Spring 9 Rotation Angle Control Means 91, 92 Pins 10, 11 Fixing Screw 15 Grip 16 Grip Main Body 161 Screw 17 Branch 18 Connector 19 Connector Fixing Member 20 Connection Tube 21 Fiberscope Insert 22 Connector 23 Connector Fixing Member 24 Connection Tube 25 Optical fiber fixing member 26 Cover 27 Valve cap 28 Tip surface 100 Catheter 101 Catheter body 102 Base end 103 Tip part 104 First lumen 105 Second lumen 106 Third lumen 107 Fourth lumen 108 Optical fiber Bundles 109 Okuhikariyo fiber 110 light-receiving fiber 120 and 130 wire

[Procedure amendment]

[Submission date] November 4, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0048

[Correction method] Change

[Correction content]

The locking portion for locking the wires 120 and 130 is a through hole 6 formed in the hollow shaft 6 as shown in the figure.
The number is not limited to 2, and may be, for example, a hook, a pulley, or a round bar provided on the outside of the catheter body 101.

Claims (1)

[Claims] 1. An operation tool which is attached to a proximal end side of a catheter having a tip end of at least one wire fixed to a tip end thereof and which pulls the wire to bend the tip end portion of the catheter. The tool has a grasping portion and a bending operation portion, and the bending operation portion includes an operation portion main body connected to the grasping portion, and the wire provided along the longitudinal direction of the catheter of the catheter. A locking part of the wire directed in the radial direction, a reel part for winding the wire directed in the radial direction of the catheter, an operation dial installed rotatably around the axis of the catheter with respect to the operation part main body, An operation tool for a catheter comprising: an operation dial; and a fixing means for fixing a base end portion of a wire wound around the reel portion.