KR20090121209A - Handle for catheters - Google Patents

Abstract

PURPOSE: A handle for a catheter is provided, which makes operation improved and can easily stop a manipulation part in the arbitrary axial position. CONSTITUTION: A handle for a catheter comprises a handle body(24); a manipulation part(22) which is mounted in an axial direction about the handle body; and an elastic member(42) of a ring shape which is mounted between the handle body and manipulation part. The proximal end of the catheter tube is fixed to the manipulation part. The elastic member is mounted in the handle body. In the outside circumference surface of the controller member placed on the inner girth of the handle body, the taper surface(40) in which the outside diameter becomes small toward the top is formed. A controller wire is inserted and penetrated within the catheter tube.

Description

Handle for Catheters {Handle for catheters}

The present invention relates to a catheter handle excellent in operability.

Various catheters have been proposed as medical catheters. In the proximal end side of the catheter, a catheter handle is usually provided. Various handles for catheter have been proposed according to the type of catheter.

For example, the distal end of the catheter may be bent or extended by manipulating the operation portion of the catheter handle.

As a handle for catheter used in such a case, the handle of the piston structure which inserted the drive member in the cylinder is proposed, for example as shown in following patent document 1. In this conventional handle, the outside diameter of the piston and the inside diameter of the cylinder are constant along the axial direction.

Depending on the method of using the catheter, the distal end of the catheter may be inserted into the body of the patient to maintain the shape while the distal end of the catheter is bent. In such a case, it is necessary to brake the axial movement of the operation section with respect to the catheter handle. Therefore, a structure has been proposed in which a ring-shaped elastic member such as an O-ring is mounted between the outer circumference of the piston and the inner circumference of the cylinder to enable the operation portion of the catheter handle to be braked at any position in the axial direction.

However, in the conventional handle, since the outside diameter of the piston and the inside diameter of the cylinder are constant along the axial direction, if the brake performance is to be improved, there is a problem that the operation of moving the operation portion with respect to the handle becomes heavy and difficult to operate. . In addition, when the operability is improved, there is a problem that the brake performance is lowered.

[Patent Document 1] Japanese Patent Laid-Open No. 2003-319915

This invention is made | formed in view of such a fact, The objective is to provide the catheter handle which is excellent in operability and can easily stop an operation part in arbitrary axial position.

In order to achieve the above object, the catheter handle of the present invention

With the steering wheel body,

An operation unit which is mounted to move freely in the axial direction with respect to the handle body;

A handle for a catheter having a ring-shaped elastic member mounted between the handle body and the operation portion,

The elastic member is in contact with a tapered surface formed on a part of the handle body or a part of the operation part.

According to the first aspect of the present invention,

The proximal end of the catheter tube is fixed to the operation section,

The elastic member is mounted to the handle body,

A part of the said operation part enters into the inner periphery of the said handle main body,

The tapered surface is formed on the outer circumferential surface of the operation portion that is entered into the inner circumference of the handle body,

An operation wire is inserted into the catheter tube,

The distal end of the operation wire is fixed to a part of the distal end of the catheter tube,

The proximal end of the operation wire is fixed to a part of the handle body,

When the operation portion is moved in the distal end direction with respect to the handle main body, the elastic member moves relative to the tapered surface in the axial direction toward the greater outer diameter of the tapered surface.

Preferably, a tapered surface is formed on the outer circumferential surface of the operation portion, which is enclosed in the inner circumference of the handle body, to reduce the outer diameter in the distal end direction.

The inner peripheral surface of the elastic member is in contact with the outer peripheral surface of the tapered surface and is configured to be movable in the axial direction.

Preferably, the distal end of the catheter tube is manipulated by moving the operation portion axially relative to the handle body.

According to a second aspect of the invention,

The proximal end of the catheter tube is fixed to the handle body,

The operation portion is mounted freely in the axial direction around the outer portion of the handle body,

It is formed in the taper surface in the inner peripheral part of the said operation part,

The outer circumference of the elastic member is in contact with the tapered surface,

The inner circumference of the elastic member is in contact with a portion outer circumference of the handle body,

An operation wire is inserted into the catheter tube,

The distal end of the operation wire is fixed to a part of the distal end of the catheter tube,

The proximal end of the manipulation wire is fixed to a part of the manipulation section,

According to the axial movement of the operation portion relative to the handle body, the axial position of the handle body in contact with the elastic member changes,

Operating the distal end of the catheter tube by axially moving the operation portion with respect to the handle body,

The direction which moves the said operation part to the distal end side with respect to the said handle main body corresponds with the direction to which the outer diameter in the said taper surface becomes large.

A portion of the inner periphery of the operation portion is formed with a tapered surface with a larger outer diameter in the distal end direction,

The outer circumference of the elastic member is in contact with the tapered surface,

The inner circumference of the elastic member is configured to be movable in the axial direction in contact with a portion of the outer circumference of the handle body.

Preferably, the tapered surface is formed of a push ring mounted between the operation portion and a part of the handle body.

According to the present invention, it is possible to provide a catheter handle which is excellent in operability and which can easily stop the operation portion at any axial position.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated based on embodiment shown in drawing.

First embodiment

As shown in FIG. 1, the tip deflection operable catheter 2 of one Embodiment of this invention is used for the diagnosis or treatment of arrhythmia in the heart, for example, The catheter tube (tube member) 4 At the distal end of the tip chip 10 and a plurality of intermediate rings 12 are mounted. The tip chip 10 and the intermediate ring 12 function as electrodes, and are fixed to the catheter tube 4 by, for example, adhesion with an adhesive.

A handle 20 is attached to the proximal end of the catheter tube 4. A lead wire enters through the catheter tube 4 and the handle 20, respectively, and its tip is electrically connected to the tip chip 10 and the intermediate ring 12 constituting the electrode. Moreover, the base end of these conducting wires is connected to the connector 21 fixed to the rear end of the handle 20 shown in FIG. In addition, the handle 20 is equipped with an operation handle 22 for performing deflection movement operation (head shaking operation) of the distal end of the catheter tube 4.

The catheter tube 4 is made of a hollow tube member and may be made of a tube having the same characteristics along the axial direction. Preferably, the catheter tube 4 has a shaft with respect to the distal end and the distal end, which is relatively flexible. It is integrally formed in the direction and has a proximal end portion that is relatively rigid than the distal end portion. In addition, although the length of the catheter tube 4 is shown short in FIG. 1, it is actually several times-about tens of times longer than the axial length of the handle 20. As shown in FIG.

The catheter tube 4 is made of synthetic resin such as polyolefin, polyamide, polyether polyamide, polyurethane, or the like. The outer diameter of the catheter tube 4 is generally about 0.6 to 3 mm, and the inner diameter is about 0.5 to 2.5 mm. In the axial lumen of the catheter tube 4, the conductive wires connected to the tip chip 10 and the intermediate ring 12 constituting the electrode shown in FIG. 1 are insulated from each other.

The tip chip 10 and the intermediate ring 12 shown in FIG. 1 are made of a metal having good electrical conductivity, such as aluminum, copper, stainless steel, gold, and platinum. In addition, in order to make the contrast property with respect to X-rays favorable, these tip chips 10 and the intermediate ring 12 are preferably comprised of platinum etc. Although the outer diameter of the tip chip 10 and the intermediate ring 12 is not specifically limited, It is preferable that it is about the same as the outer diameter of the catheter tube 4, and it is about 0.5-3 mm normally.

The head shaking member is accommodated inside the distal end of the catheter tube 4. It does not specifically limit as a hair shaking member, For example, it is comprised from the leaf spring etc. The distal end of the operation wire 30 shown in FIGS. 2-4 is connected and fixed to the leaf spring as this head shaking member.

Although the outer diameter of the operation wire 30 is not specifically limited, Preferably it is 0.01-0.3 mm, More preferably, it is 0.03-0.08 mm. The operation wire 30 is made of, for example, a Ni-Ti superelastic alloy, but is not necessarily made of a metal. The operation wire 30 may be made of, for example, a high strength non-conductive wire or the like.

After adjusting the tension of the operation wire 30 in this embodiment, the proximal end of the operation wire 30 is fixed to the wire tension adjustment tool 32 as shown in FIG. The wire tension adjusting tool 32 is freely mounted in the handle main body 24 of the handle 20 in the axial direction. By fixing this wire tension adjusting tool 32 to a predetermined axial position inside the handle main body 24, the tension of the operation wire 30 can be adjusted.

As shown in FIG. 2, the proximal end of the catheter tube 4 is fixed to the operation handle 22 and the operation cylinder 28 via the sheath tube 26. The operation handle 22 and the operation cylinder 28 correspond to the operation unit. The operation cylinder 28 is inserted into the shaft hole 25 formed in the handle main body 24 to be free to move in the axial direction with respect to the handle main body 24.

The operator holds the handle main body 24 with one hand, operates the operation knob 22 with the finger of one hand, and enables the operation cylinder 28 to be moved in the axial direction with respect to the handle main body 24. . Since the operation cylinder 28 is connected and fixed to the proximal end of the catheter tube 4, when the operation cylinder 28 is moved in the axial direction with respect to the handle main body 24, the operation wire 30 is connected to the operation wire 30. The proximal end of the catheter tube 4 relatively moves relative to the axial direction. Further, the tip of the operation wire 30 is fixed to the head shaking member provided near the distal end of the catheter tube 4, and the proximal end of the operation wire 30 is fixed to the handle 20. It is fixed to 32.

When the operation cylinder 28 is moved to the distal end side, the proximal end of the catheter tube 4 is relatively moved to the distal end side while the proximal end of the operation wire 30 is fixed to the wire tension adjusting port 32. In this case, by the operation of the operation cylinder 28, the tension is applied to the operation wire 30, and the force that compresses in the axial direction is applied to the catheter tube 4. In addition, since the length of the operation wire 30 and the catheter tube 4 hardly changes in the axial direction, the catheter tube 4 and the operation wire 30 are bent. As a result, as shown in FIG. 1, as shown by the arrow A of the distal end of the catheter tube 4, a head shaking deflection operation is performed.

That is, the distal end of the catheter 2 can be deflected and moved in the A direction by operating the operation knob 22 of the handle 20 shown in FIG. 1 in the axial direction X. FIG. Moreover, when the handle 20 is rotated about the axis, the direction of the A direction with respect to the catheter 2 can be set freely in the state inserted in the body cavity.

In this embodiment, as shown to FIG. 3 and FIG. 4, the taper surface 40 is formed in the outer peripheral surface of the operation cylinder 28. As shown in FIG. The tapered surface 40 is a tapered surface whose outer diameter decreases toward the distal end side of the handle body 24. The length of the tapered surface 40 in the axial direction is preferably equal to or greater than the length of the range in which the operation knob 22 is relatively movable in the axial direction with respect to the handle main body 24. Specifically, the length in the axial direction of the tapered surface 40 is preferably 5 to 20 mm. The taper inclination angle of the tapered surface 40 is preferably an angle of 0.1 to 2.0 degrees with respect to the shaft center.

The maximum outer diameter in the tapered surface 40 is a dimension equal to or less than the inner diameter of the shaft hole 25 shown in FIG. 2, and the operation cylinder 28 can move the inside of the shaft hole 25 in the axial direction X. Determined to lose. The axial length of the operation cylinder 28 is preferably 40 to 80 mm longer than the axial length of the tapered surface 40.

The inner peripheral surface of the O-ring 42, which is a ring-shaped elastic member, is in contact with the tapered surface 40 by sliding. The O-ring 42 is mounted in a cap 44 which is detachably attached to the distal end of the handle body 24 and an O-ring groove 46 formed between the handle body 24. have. The outer circumferential surface of the O-ring 42 is always in contact with the inner circumferential surface of the O-ring groove 46, and the inner circumferential surface of the O-ring 42 is always in contact with the tapered surface 40. . However, it is preferable that there is a gap 47 in the axial direction of the O-ring groove 46. The O-ring 42 is made of, for example, rubber such as silicone rubber, nitrile rubber, fluorine rubber or synthetic resin.

The operator holds the handle main body 24 with one hand, operates the operation knob 22 with the finger of one hand, and shows the operation cylinder 28 with respect to the handle main body 24, for example in FIG. The operation was performed in the state shown in FIG. In this case, since the operation cylinder 28 is connected and fixed to the proximal end of the catheter tube 4, the catheter tube 4 relatively moves relative to the operation wire 30 in the axial direction. As a result, as shown in FIG. 1, the distal end part of the catheter tube 4 turns into a curved state as shown by arrow A in a linear state.

In addition, in this embodiment, when the operation cylinder 28 moves with respect to the handle main body 24 toward the distal end direction, the O-ring 42 moves to the tapered surface 40 with respect to the operation cylinder 28. The outer diameter of the ball moves relatively axially from the smaller to the larger. That is, in this case, the force in the direction in which the O-ring 42 is widened in the circumferential direction increases with the movement. Moreover, since the inside diameter of the O-ring groove 46 is invariable, the space | interval of the operation cylinder 28 and the O-ring groove 46 becomes narrow according to the said movement, and the O-ring 42 is the operation cylinder 28 for operation. And the force which pushes down the cap 44 becomes strong, and the frictional force of the O-ring 42 and the operation cylinder 28 increases.

Moreover, when the operation cylinder 28 is moved to the most proximal end direction with respect to the handle main body 24, the O-ring 42 is the outer side in the taper surface 40 relatively with respect to the operation cylinder 28. As shown in FIG. It is located at the smallest diameter. For this reason, in this case, since the space | interval of the operation cylinder 28 and the O-ring groove 46 becomes the largest, the force which the O-ring 42 presses down the operation cylinder 28 and the cap 44 is the most. It becomes small and the frictional force of the O-ring 42 and the operation cylinder 28 is reduced. Therefore, at the time of the initial movement which moves the operation knob 22 toward the axial direction away from the handle main body 24, the operation knob 22 moves to the axial direction with light force.

And even if a finger is removed from the operation handle 22, as shown in FIG. 4, the O-ring 42 contacts the taper surface 40 with a large outer diameter, and the operation handle 22 is because of the friction force. ) Does not move in the axial direction. For this reason, even if a finger is removed from the operation handle 22, the distal end of the catheter tube 4 shown in FIG. 1 can be kept bent.

In order to make the distal end of the catheter tube 4 shown in FIG. 1 upright, the operation handle 22 is moved to the axial direction against the frictional force of the taper surface 40 and the O-ring 42, and FIG. What is necessary is just to return to the state shown in FIG. At that time, since the O-ring 42 moves from the large outer diameter portion of the tapered surface 40 to the small outer diameter portion, the frictional force between the tapered surface 40 and the O-ring 42 gradually decreases.

2nd Embodiment

The catheter handle 20a of the tip deflection operable catheter 2a of the embodiment shown in FIG. 5 and FIG. 6 is the catheter of the tip deflection operable catheter 2 of 1st Embodiment mentioned above except the following. It has the same structure and effect as the dragon handle 20, and the overlapping description is omitted.

In this handle 20a, the catheter tube 4a is connected and fixed to the distal end of the handle main body 24a of the handle 20a via the sheath 26a. An operating wire 30 is disposed freely in the catheter tube 4a in the axial direction X. The proximal end of the wire 30 has a slide piece 50 in which the tension of the wire 30 can be adjusted. Is fixed to

As shown in FIG. 6, the plate-shaped slide piece 50 is connected and fixed to the ring-shaped operation handle 22a via the slide hole 60 formed in the handle main body 24a. The slide piece 50 is movable to the axial direction X along the slide hole 60 with respect to the handle main body 24a with the operation handle 22a. The slide holes 60 are formed in two places in the circumferential 180 degree symmetrical position of the handle main body 24a, and the length of the axial direction is the axially movable range of the handle 22a and the slide piece 50 for operation. It defines.

The ring-shaped cap 54 is fixed to the operation knob 22a freely in the axial direction, and forms an elastic member accommodating groove 46a therebetween. The elastic member accommodating groove 46a houses a ring-shaped elastic member 42a and a backup ring 52 having a tapered surface 40a which is press-contacted around its outer circumference. .

The inner circumferential surface of the backup ring 52 has a predetermined gap with respect to the outer circumference of the handle body 24a. The inner circumferential surface of the ring-shaped elastic member 42a is in contact with the outer circumference of the handle main body 24a, and the ring-shaped elastic member 42a moves in the axial direction with the movement of the slide piece 50, Its inner circumferential surface slides about the outer circumference of the handle body 24a.

The operator holds the handle main body 24a with one hand, operates the operation knob 22a with the finger of one hand, and moves the slide piece 50 along the slide hole 60 to the proximal end side with respect to the handle main body 24a. It was taken in and pulled and operated in the state shown in FIG. In that case, the operation wire 30 is pulled toward the proximal end side, and the operation wire 30 is pulled with respect to the catheter tube 4a. As a result, as shown in FIG. 1, the distal end part of the catheter tube 4 turns into a curved state as shown by arrow A in a linear state.

In addition, in this embodiment, when the slide piece 50 moves axially to the proximal end side with respect to the handle main body 24a, the ring-shaped elastic member 42a is made to the taper surface 40a of the elastic member accommodation groove 46a. The outside diameter is pushed down to the larger side. In this case, since the ring-shaped elastic member 42a can deform toward the larger outer diameter of the elastic member accommodating groove 46a, as a result, the force of the ring-shaped elastic member 42a to tighten the handle body 24a. This weakens, and the frictional force between the ring-shaped elastic member 42a and the handle main body 24a is reduced. Therefore, at the time of the initial movement which moves the operation handle 22a toward the proximal end direction with respect to the handle main body 24a, the operation handle 22a moves axially with light force.

And even if a finger is removed from the operation handle 22a, as shown in FIG. 6, the slide piece 50 and the operation handle 22a are pulled in the distal end direction because of the tension of the operation wire 30. As shown in FIG. Lose. In this case, the outer diameter in the tapered surface 40a of the elastic member accommodation groove 46a is pushed down to the smaller side. That is, since the ring-shaped elastic member 42a is deformed so that the outer diameter of the elastic member accommodating groove 46a is pushed to a smaller side, the force that the ring-shaped elastic member 42a tightens the handle main body 24a becomes stronger as a result. The frictional force between the ring-shaped elastic member 42a and the handle main body 24a is increased.

For this reason, even if a finger is removed from the operation handle 22, the operation handle 22a does not move in the axial direction, and the distal end of the catheter tube 4 shown in FIG. 1 can be kept bent.

In order to make the distal end of the catheter tube 4 shown in FIG. 1 upright, the operation handle 22a goes against the frictional force of the inner peripheral surface of the elastic member 42a and the outer peripheral surface of the handle main body 24a. ) Is moved to the distal end side in the axial direction.

In addition, this invention is not limited to embodiment mentioned above, It can variously change within the scope of this invention. For example, the handle for a catheter of the present invention is not limited to the tip deflectable catheter of the illustrated embodiment, but can also be applied to other catheters.

1 is an overall perspective view of a catheter of an embodiment of the present invention.

FIG. 2 is a sectional view of principal parts of the catheter handle shown in FIG. 1. FIG.

3 is a cross-sectional view showing a further main part of FIG. 2.

4 is a cross-sectional view illustrating a state in which an operation unit is moved from the state of FIG. 3.

5 is a half cross-sectional perspective view of a catheter handle according to another embodiment of the present invention.

FIG. 6 is a cross-sectional view illustrating main parts of FIG. 5. FIG.

Explanation of the sign

2, 2a... Tip deflection catheter

4, 4a... Catheter tube

20, 20a... Catheter handle

22, 22a... Operation handle

24... Handle body

30... Operation wire

40, 40a... Tapered face

42... O ring

42a... Ring-shaped elastic member

Claims (4)

With the steering wheel body, An operation unit which is mounted to move freely in the axial direction with respect to the handle body; A handle for a catheter having a ring-shaped elastic member mounted between the handle body and the operation portion, The proximal end of the catheter tube is fixed to the operation section, The elastic member is mounted to the handle body, The operation cylinder which comprises the said operation part enters the inner periphery of the said handle main body, On the outer circumferential surface of the operating cylinder, which enters the inner circumference of the handle body, a tapered surface is formed in which the outer diameter decreases in the distal end direction. The inner peripheral surface of the elastic member is in contact with the outer peripheral surface of the tapered surface is configured to be movable in the axial direction, An operation wire is inserted into the catheter tube, The distal end of the operation wire is fixed to a part of the distal end of the catheter tube, The proximal end of the manipulation wire is fixed to a part of the handle body, When the operation portion is moved from the proximal end to the distal end with respect to the handle body, the distal end of the catheter tube is bent, and the elastic member is disposed on the tapered surface with respect to the tapered surface. A handle for a catheter, wherein the handle moves relatively in the axial direction toward the larger outer diameter. The method of claim 1, When the operation portion is moved from the proximal end to the distal end with respect to the handle body, the distal end portion of the catheter tube is bent in a straight state, and the elastic member is in the tapered surface with respect to the tapered surface. Catheter handle, characterized in that the relative movement in the axial direction toward the outer diameter of the larger. With the steering wheel body, An operation unit which is mounted to move freely in the axial direction with respect to the handle body; A pressing ring mounted between the operating portion and a part of the handle main body and axially moved with respect to the handle main body together with the operating portion; A handle for catheter having a ring-shaped elastic member mounted between the handle body and the pressing ring, The proximal end of the catheter tube is fixed to the handle body, The operating portion and the pressing ring are mounted freely in the axial direction around the outer portion of the handle body, A portion of the inner ring of the push ring is formed with a tapered surface that increases in diameter in the distal end direction, The outer circumference of the elastic member is in contact with the tapered surface, The inner circumference of the elastic member is configured to be movable in the axial direction in contact with the outer circumference of the handle body, An operation wire is inserted into the catheter tube, The distal end of the operation wire is fixed to a part of the distal end of the catheter tube, The proximal end of the manipulation wire is fixed to a part of the manipulation section, The axial position of the handle body in contact with the elastic member changes in accordance with the axial movement of the operation portion and the push ring relative to the handle body, By moving the operation portion and the pressing ring from the distal end to the proximal end with respect to the handle body, the distal end of the catheter tube is bent and the elastic member is pressed down toward the larger diameter on the tapered surface. Catheter handle, characterized in that the losing. The method of claim 3, By moving the operation portion and the pressing ring from the distal end to the proximal end with respect to the handle body, the distal end portion of the catheter tube is bent in a straight state, and the elastic member has a diameter at the tapered surface. The handle for a catheter, which is pressed down by this large side.

Images