TWI728116B - Medical inner tube - Google Patents

Abstract

The subject of the present invention is to provide an inner tube with high operability.

The solution is an inner tube (20) capable of inserting an endoscope and a treatment tool into the interior, which has: a flexible bendable oscillating tube (22) provided at the front end, and an internal tube (20) along the axial direction. A sliding button (25a) slidably installed on the outer circumference of the inner tube (20). The front end of the oscillating tube (22) and the sliding button (25a) are connected by a wire member (29a). It also has: a stop ring (28) that is provided on the slider (25a), the direction intersecting the aforementioned axial direction as a rotation axis, and a freely rotating stop ring (28), and a base end portion of the inner tube (20), which is set to face the base A protruding part (26a) set by a stop ring (28) that rotates on the end side.

Description

Medical inner tube

The present invention relates to an inner tube that assists the insertion of a treatment tool such as an endoscope, forceps, or a scalpel when the treatment tool is inserted into a body cavity.

Conventionally, there has been a technique of inserting an endoscope and a treatment tool such as a forceps or a scalpel used under observation of the endoscope into a body cavity to perform treatment.

In order to perform such a technique, there is known a treatment tool insertion aid equipped with a plurality of inner tubes and an outer tube that can be inserted into the inner tube. The plurality of inner tubes can be used for the endoscope and the treatment The tools are inserted into the interior with ease of advance and retreat.

The method of using this treatment tool insertion aid is to first make the front end of the outer tube face the treated part. Next, the front end of the inner tube is protruded from the front end. Then, it is fixed to the tip portion via a wire, and the sliding member slidably mounted on the inner tube is pulled to the base end side, thereby causing the tip portion of the inner tube to radiate away from the axis of the outer tube Curved likewise. At this time, a small wedge-shaped sliding stopper mounted on the back side of the sliding member is inserted between the sliding member and the inner tube, thereby maintaining the bend The state of the song.

Then, after the endoscope and the treatment tool are respectively advanced to protrude from the inner tube, the endoscope and the treatment tool are bent in a direction close to the axis of the outer tube so as to face the treated part.

With the above, the aforementioned auxiliary tool for inserting the treatment tool can ensure a sufficient working space and visual field, and it is easy to grasp the sense of distance.

[Prior Technical Literature] [Patent Literature]

[Patent Document 1] International Publication No. WO2016/143142

However, in order to hold the aforementioned inner tube in a bent state, it is necessary to operate a small sliding stopper, which has the inconvenience that operability is not easy. In addition, in order to release the bent state, it is necessary to use a nail to pull out the inserted slide stopper from between the slide member and the inner tube, so there is also the inconvenience that the operability is not easy.

In view of the above-mentioned points, the purpose of the present invention is to provide an inner tube with high operability.

In order to achieve such a purpose, the inner tube of the present invention is inserted into: an assisting tool for inserting the endoscope and the treatment tool into the body cavity, and the endoscope and the treatment tool can be inserted through The inner tube inside is characterized by: a bendable bending part, which is arranged at the front end of the inner tube and has flexibility; a steel wire member, one end of which is fixed to the front end of the aforementioned bending part; sliding A member that fixes the other end of the wire member and is slidably mounted on the outer circumference of the inner tube along the axial direction of the inner tube; and a holding mechanism that slides the sliding member to the base end of the inner tube The holding mechanism is provided with a rotatable stopper part, which is provided on the sliding member, and uses a direction intersecting the axial direction as a rotation axis; and a protrusion, It is provided at the base end of the inner tube and is closed by the stopper rotating toward the base end side.

In the inner tube of the present invention, the curved part and the sliding member are connected via a wire member. Therefore, when the inner tube protrudes from the distal end of the treatment tool insertion aid, the sliding member is pulled to the proximal side, and the curved part Will be bent. Then, in this state, the stopper portion provided on the sliding member is rotated toward the base end portion of the inner tube to be caught by the protruding portion, thereby maintaining the bent state of the bent portion.

Therefore, the inner tube of the present invention is operated by rotating the stopper to perform the hooking or unfastening of the protruding part, and the bent state can be maintained and released, so the operability is high.

In the inner tube of the present invention, it is desirable that the protruding portion is provided at a position where the sliding member that is slid to bend the bent portion contacts.

Thereby, as long as the sliding member is pulled to the base end side, the bending part will be bent moderately until it comes into contact with the protruding part, so the operability is high.

In the inner tube of the present invention, the length of the stopper portion is smaller than the distance from the rotation axis of the sliding member to the protrusion, and the stopper portion is characterized by a stretchable elastic material.

Thereby, it is possible to prevent the bending state from being loosened by the operation of pulling the catching part while being caught by the protrusion part.

In addition, in the inner tube of the present invention, it is preferable that the protruding portion is provided with a plurality of trapped portions that are trapped by the trapping portions. Thereby, the distance that the sliding member is pulled to the base end side changes according to the position of each covered part covered by the covering part, so the amount of bending of the bending part can be adjusted.

10‧‧‧Aid for insertion of treatment tools

20‧‧‧Inner tube

22‧‧‧Bending part (shaking head tube)

25a‧‧‧Sliding member (slide button)

26a‧‧‧Protrusion

28‧‧‧Sleeve stop (stop ring)

29a‧‧‧Wire components

Fig. 1 is an explanatory diagram showing an auxiliary tool for inserting a treatment tool according to an embodiment of the present invention.

Fig. 2 is an explanatory view showing an inner tube of the treatment tool insertion aid of Fig. 1 and a perspective view showing an extended state.

Fig. 3 is an explanatory view showing an inner tube of the treatment tool insertion aid of Fig. 1 and a perspective view showing a bent state.

Fig. 4 is a side view showing a modification of the inner tube of the treatment tool insertion aid of the present invention.

The auxiliary tool 10 for inserting a treatment tool according to an embodiment of the present invention will be described. The treatment tool insertion aid 10 is used to assist the introduction of a treatment tool (not shown) such as an endoscope, forceps, and a scalpel into the body.

The auxiliary tool 10 for inserting a treatment tool is mainly composed of an inner tube 20 and an outer tube 30 as shown in FIG. 1. One or more inner tubes 20 are inserted into the outer tube 30.

The outer tube 30 is a bendable cylindrical body having flexibility, and the inner wall surface is provided with a plurality of guide portions (not shown) extending in the axial direction from the distal end side to the proximal end side. The guide portion is, for example, a dovetail groove formed on the inner wall surface of the outer tube 30, and the inner wall surface is formed at equal intervals in the circumferential direction.

On the proximal end side of the outer tube 30, a duct 32, an air leakage prevention ring 33, and a valve seat (not shown) are attached.

The duct 32 is a member that connects the outer tube 30 and the air leakage prevention ring 33, and is formed of a metal such as stainless steel or a hard material such as resin. The air leakage prevention ring 33 is connected to the valve seat. The air leakage prevention ring 33 is detachably attached to the duct 32. A plurality of holes through which the inner tube 20 is inserted are formed in the valve seat.

As shown in FIG. 2, the inner tube 20 is a flexible cylindrical body, and a treatment tool such as an endoscope and forceps or a scalpel can be inserted into the inside. The inner tube 20 is subjected to hydrophilic processing on the outer peripheral surface.

In the present embodiment, the inner tube 20 is equipped with four pieces of the same outer diameter, but it is also possible to mount the inner pipe 20 with different outer diameters.

The inner tube 20 is formed by alternately coupling soft parts 20a and hard parts 20b in the axial direction. The soft parts 20a are made of soft plastics such as polypropylene and polyvinyl chloride resin, rubber, and other soft materials. The hard parts 20b are more The soft portion 20a is also hard, and is made of hard plastics such as ABS and polycarbonate, or hard materials such as hard rubber.

The inner tube 20 includes an engaging portion 21 that is slidably engaged with the guide portion of the outer tube 30 from the tip to the base end of the outer peripheral surface, and a scale (not shown) for grasping the insertion depth.

The engaging portion 21 of the inner tube 20 is a dovetail-shaped protrusion protruding from the outer peripheral surface of the inner tube 20 in this embodiment, but it may have any shape as long as it can be engaged with the guide portion of the outer tube 30.

The engaging portion 21 of the inner tube 20 is intermittently provided in a part of the portion from the front end to the base end of the inner tube 20. In this embodiment, the hard parts 20b are provided on the front end side and the center part, respectively. As the two engaging parts 21 are sandwiched by the guide part of the outer tube 30, the inner tube 20 is attached to the outer tube 30.

Therefore, the inner tube 20 can be reliably attached to the outer tube 30 by the engagement part 21 provided in the hard part 20b.

In addition, since the area of the inner tube 20 sandwiched by the hard portion 20b is constituted by the flexible portion 20a that can be bent, the inner tube 20 does not hinder the bending when the outer tube 30 is bent.

In addition, since the inner tube is slidable on the guide portion of the outer tube 30 via the engaging portion 21, when the outer tube 30 is bent, each inner tube 20 can follow each other while sliding, so this structure will not hinder Bending of the outer tube 30.

A flexible head tube 22 and a nose cover 23 are installed at the front end of the inner tube 20. Specifically, the base end of the oscillating tube 22 is attached to the hard portion 20 b on the tip side, and the nasal mask 23 is attached to the tip of the oscillating tube 22.

The oscillating tube 22 is a flexible tube that connects thin-walled ring members into a multi-joint shape and can bend in any one direction. For example, it is a stainless steel tube that can be configured to bend only from the stretched state. Bending mechanism in one direction. In addition, the oscillating tube 22 may be formed by connecting a tube made of a flexible soft material or a ring made of a hard plastic material such as ABS or polycarbonate. In addition, the oscillating tube 22 is a bending part corresponding to the present invention.

The nasal mask 23 is made of plastic that is the same as or softer than the oscillating tube 22, for example, made of soft plastic such as polyvinyl chloride resin, rubber, or the like. Since the nasal mask 23 is made of a soft material, there will be no damage to the tissue even if it comes into contact with the tissue.

In the following, when the inner tube 20 is viewed from the nasal mask 23 side along the axial direction of the inner tube 20, the direction in which the oscillating tube 22 is bent is defined as the upward direction, and the direction from the bent state to the extended state is defined as the downward direction , And the direction orthogonal to the up-down direction is defined as the left-right direction for description.

At the base end of the inner tube 20, a slide pipe 24, slide knobs 25a, 25b, a slide stopper 26, and a degassing prevention valve 27 are attached. The slide tube 24, the slide buttons 25a, 25b, the slide stopper 26, and the degassing prevention valve 27 are formed of the same hard material as the hard part 20b.

The slide tube 24 has a roughly cylindrical shape, and on the outer periphery, the horizontal strip portions 24a and 24b are arranged symmetrically with an axis sandwiched therebetween. The horizontal strip portion 24a is constituted by a pair of strip portions each protruding in the left-right direction on one side and extending along the axial direction on the other side. Similarly, the horizontal strip portion 24b is also constituted by a pair of strip portions each protruding in the left-right direction on one side and extending along the axial direction on the other side.

The sliders 25a, 25b are roughly rectangular parallelepipeds, the bottom side of which is curved and recessed in a manner corresponding to the upper side or bottom side of the slide tube 24, and is formed in a manner corresponding to the horizontal strip portions 24a, 24b of the slide tube 24, respectively.沟25c. In addition, the sliders 25a and 25b are sliding members corresponding to the present invention.

On the upper side of the slide button 25a, the supporting portion 25d is formed by integral molding. The support portion 25d is a plate-shaped piece extending from the center in the left-right direction of the slider 25a to the upper direction. A pair of hole portions 25e are provided on the left and right side surfaces of the support portion 25d. In addition, the pair of holes 25e may be connected through holes.

The front end surface of the support portion 25d is a finger placement portion formed by bending so that the fingers can be easily placed, and the base end surface thereof coincides with the base end surface forming surface of the slide button 25a.

A stopper ring 28 is attached to the pair of holes 25e. The stop ring 28 is made of an elastic member such as a stainless steel wire or rubber. The stop ring 28 is roughly C-shaped, and by inserting both ends into the pair of hole portions 25e, the pair of hole portions 25e can be rotated as a rotation axis.

The slide stopper 26 is a roughly cylindrical body that can be fitted to the outer circumference of the slide tube 24. On the upper side of the slide stopper 26, a plate-shaped protrusion 26a extending in the upward direction is provided by integrally molding from the front end to the base end side.

The length of the inner circumference of the stop ring 28 exposed from the pair of holes 25e is designed to be the same as the distance from one side of the hole 25e around the base end surface of the protrusion 26a to the other side of the hole 25e. Wait or some length. In addition, the stop ring 28 is equivalent to the stopper part of this invention.

The degassing prevention valve 27 prevents the inner tube 20 from leaking air from a body cavity, such as an abdominal cavity.

Furthermore, the steel wire members 29a, 29b are attached from the front end side to the base end side of the inner tube 20. As shown in FIG. In addition, in each peripheral wall of the soft portion 20a and the hard portion 20b, a pair of internal passages (not shown) through which the steel wire members 29a and 29b can be inserted are provided along the axial direction. The internal passage is formed to have a slightly larger diameter than the wire members 29a, 29b, so that the wire members 29a, 29b can slide inside.

The wire members 29a, 29b are fixed to the nasal mask 23 at the front end, and pass through the outside of the oscillating tube 22, according to the hard part 20b at the front end, the soft part 20a at the front end, the hard part 20b at the center, and the soft rear end. The part 20a is inserted along the axial direction in order, and the base end part is fixed to the slider 25a, 25b. Thereby, the sliding buttons 25a, 25b are configured to be slidable along the horizontal bar portions 24a, 24b of the sliding tube 24.

The operation method of the inner tube 20 is explained.

First, the inner tube 20 is inserted from the valve seat of the air leakage prevention ring 33 to the outer tube 30 and moved forward until the oscillating tube 22 is exposed from the front end of the outer tube 30.

At this time, a part of the soft portion 20a on the proximal side is exposed from the proximal end of the outer tube 30 as shown in FIG. 1. Since the soft portion 20a is bendable, the proximal end side of the inner tube 20 can be bent to the outside in the radial direction, which prevents interference by the endoscope or forceps during operation.

Next, as shown in FIG. 3, once the slider 25a is slid to the proximal side, the nasal mask 23 is pulled to the proximal side via the wire member 29a. At this time, the oscillating tube 22 is bendable, and the steel wire member 29a passes through the outside thereof, so the oscillating tube 22 is bent in a direction away from the axis of the outer tube 30.

Then, when the slide button 25a and the support portion 25d are slid to contact the slide stopper 26 and the protrusion 26a, the bending state of the swing tube 22 is completed.

In this state, the stop ring 28 is lifted and rotated to the base end side, and it is caught by the protrusion 26a. At this time, as described above, since the stop ring 28 is designed to be the same or slightly longer than the length to the base end surface of the protrusion 26a, the stop ring 28 can be fitted to the protrusion 26a by just lifting it. Thereby, it is possible to maintain the state where the swing tube 22 is bent.

Conversely, when the bent state is released, the stop ring 28 is lifted to rotate to the tip side, and is released from the protrusion 26a. Then, slide the slider 25b to the base end side. Due to this, the nasal mask 23 is pulled to the proximal side via the wire member 29b, so that the swing tube 22 can be restored to the unbent stretched state.

As explained above, since the inner tube 20 is easy to operate, it can also be operated with one hand. For example, the thumb and index finger of one hand are used to hold, and the stop ring 28 is placed on the nail of the thumb, and the pad of the thumb is placed on the upper side of the slide button 25a and supports The front end surface (finger placement portion) of the portion 25d slides the slider button 25a to contact the slide stopper 26 and the protrusion 26a, and the stop ring 28 is bounced and rotated to the proximal side to hook and fit the protrusion 26a, Thereby, the swing tube 22 is maintained in a bent state.

Conversely, when the bending state is released, the stop ring 28 is pushed up with the index finger to rotate to the front end, and the protrusion 26a is released, and the slide button 25b is slid to the base end with the middle finger, thereby restoring the oscillating tube 22 to the base end. Stretched state.

As mentioned above, although the embodiment of this invention was described, this invention is not limited to this, The structure and form can be changed suitably.

For example, the protrusion 26a is sufficient as long as the stop ring 28 can be sleeved. Therefore, it is not limited to the shape of the protrusion in the upward direction, and it is sufficient as long as the front end extends from the surface orthogonal to the axis of the inner tube 20 toward the base end. The hook bent from the upper direction to the base end side.

For example, the stop ring 28 may be directly or indirectly attached to the slide button 25a. Therefore, the support portion 25d may not have a plate shape, or it may be omitted and the stop ring 28 may be directly attached to the slide button 25a.

字狀，左右一方側開口。又，停止環28是藉由被插入至支持部25d的穴部25e而成為可旋動，但亦可在支持部25d設置一對的圓柱狀的軸部，在停止環28的一對的前端面設置對應於該軸部的插入孔。 For example, the stop ring 28 can also be

Word-like, open on the left and right sides. In addition, the stop ring 28 is rotatable by being inserted into the hole 25e of the support portion 25d. However, a pair of cylindrical shafts may be provided on the support portion 25d, and a pair of ends of the stop ring 28 The surface is provided with an insertion hole corresponding to the shaft portion.

In addition, regarding the stopper part of the present invention, the stop ring 28 is taken as an example for description in this embodiment. However, the stopper part is provided as long as it has a rotating shaft part and a stopper piece stopped by the protruding part and connects the aforementioned shaft. The connecting portion between the upper part and the aforementioned stopper piece is sufficient, so it is also possible to use the sliding button 25a and the thin-plate-shaped connecting portion extending from the upper surface of the sliding button 25a to the base end direction and extending from the front end edge of the connecting portion to and The stopper piece in the direction in which the connecting portion intersects is integrally formed, and the connecting portion of the slider 25a and the connecting portion is formed into a thin wall, so as to be swingable.

In addition, the material of the stop ring 28 may also be soft plastic, such as soft plastic such as polyvinyl chloride resin, rubber, etc., so as to be stretchable. In this case, the length of the inner circumference of the range exposed from the pair of holes 25e of the stop ring 28 is designed to be the same as that from one of the holes 25e along the base end surface of the protrusion 26a to the other of the holes 25e. It is ideal that the distances are equal or slightly shorter.

According to this, by pulling the stop ring 28 while stopping the sleeve at the protrusion 26a, it is possible to prevent the oscillating tube 22 from being slackened from the bent state.

Further, the base end side surface of the protrusion 26a of the inner tube 20 extends upward in a straight line, but as shown in Fig. 4, for example, the base end side surface of the protrusion 26a' may be formed in a stepped shape. Thereby, the amount of bending of the oscillating tube 22 can be adjusted depending on where the stop ring 28 is hooked on the stepped base end side of the protrusion 26a'.

In addition, the configuration for adjusting the amount of bending of the swing tube 22 is not limited to the example in FIG. 4.

For example, a plurality of grooves parallel to the base end side surface of the protrusion 26a may be provided on the upper surface of the protrusion 26a. Thereby, by hanging the stop ring 28 in the aforementioned groove near the base end, the bending amount of the swing tube 22 can be enlarged. Conversely, by hanging the stop ring 28 in the aforementioned groove near the front end, the swing head can be reduced. The amount of bending of the tube 22.

In addition, for example, on the base end side of the protrusion 26a, from the root side to the tip side of the protrusion 26a, a plurality of trapped portions may be separated at predetermined intervals. Thereby, by obliquely blocking the stop ring 28 with respect to the blocked portion on the root side of the protruding portion 26a, the amount of bending of the oscillating tube 22 can be enlarged, and the stop ring 28 is opposed to the front end side of the protruding portion 26a. The capped part is capped parallel to the inner tube 20, so that the amount of bending of the head tube 22 can be reduced.

20: inner tube

20a: soft part

20b: Hard part

21: The card joint

22: Bend (shaking head tube)

23: nose mask

24: Sliding tube

24a: horizontal bar

24b: horizontal bar

25a: Sliding member (slide button)

25b: slider

25c: groove

25d: Support Department

25e: hole

26: Sliding stop

26a: protrusion

27: Degassing prevention valve

28: Set stop (stop ring)

29a: Steel wire member

29b: Steel wire member

Claims (4)

A medical inner tube that is inserted into: a treatment tool insertion aid used to assist the endoscope and treatment tool to be introduced into the body cavity, and the endoscope and treatment tool can be inserted into the internal medical use The tube is characterized by having: a bendable bending part, which is provided at the front end of the medical inner tube and has flexibility; a steel wire member, one end of which is fixed to the front end of the aforementioned bending part; a sliding member, It is fixed to the other end of the steel wire member, and is slidably mounted on the outer periphery of the medical inner tube along the axial direction of the medical inner tube; and a holding mechanism is used to slide the sliding member on the medical inner tube. The base end side of the inner tube is held in a state where the bending portion is bent, and the holding mechanism has: a rotatable stopper portion, which is provided on the sliding member, and the direction intersecting the axial direction is used as a rotation axis ; And the protrusion, which is provided at the base end of the inner tube for medical use, for the stopper that rotates toward the base end side to stop. The medical inner tube according to the first item of the scope of patent application, wherein the protruding portion is provided at a position that is slid to be brought into contact with the sliding member that bends the curved portion. For example, the medical inner tube in item 1 of the scope of patent application, in which the aforementioned sleeve The length of the stop portion is smaller than the distance from the rotation axis of the sliding member to the protrusion portion, and the sleeve stop portion is made of a stretchable elastic material. For example, the medical inner tube of item 1 of the scope of patent application, wherein the protruding part is provided with a plurality of quilt stop parts for the stop part to stop.

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