TWI400055B - Endoscopic adapter - Google Patents

Abstract

[PROBLEMS] An adapter for an endoscope can reliably discharge to the outside a liquid, such as bodily fluid, water, chemical liquid, adhering to a distal end surface of the endoscope. [MEANS FOR SOLVING PROBLEMS] The adapter (1) for an endoscope is formed as a tube body having an installation section (2) removably installed on the outer peripheral surface of a distal end surface (Ea) of the endoscope (E) and also having a projection projecting forward of the endoscope (E) from a distal end (2a) of the installation section (2). The installation section (2) has at least one liquid discharge groove (4) opened to an inner space (S) that is formed by an inner peripheral surface (3a) of the projection (3) and by the distal end surface (Ea) of the endoscope (E) and formed depressed in an inner peripheral surface (2c) toward a proximal end (2b), and the installation section (2) also has at least one liquid discharge hole (5) connected to the liquid discharge groove (4) and penetrating through the installation section (2) in its thickness direction to be communicated with an outer peripheral surface (2d). The liquid discharge groove (4) and the liquid discharge hole (5) are formed so that a liquid, such as bodily fluid, water, and chemical liquid, adhering to the distal end surface (Ea) of the endoscope (E) is discharged to the outside by the capillary effect.

Description

Adapter for endoscope

The present invention relates to an adapter for an endoscope that is detachably attached to a front end portion of an endoscope.

In recent years, endoscopes have been used for surgery, examination, and the like of digestive organs. As shown in Fig. 3(a), the endoscope E is attached to the outer surface of the distal end portion Ea via a rigid resin endoscope adapter 11 and detachably attached to the flexible resin soft cover 12 to prevent the installation. The objective lens or the like of the front end face Eb is not in contact with the treated portion.

However, the body fluid (blood, lymph, and tissue fluid) that has flowed out from the treatment portion, and the liquid such as water or chemical liquid supplied to the treatment target for washing the body fluid may adhere to the objective lens of the distal end surface Eb of the endoscope E. This causes the vision of the endoscope E to deteriorate and hinder the treatment. Then, as shown in Fig. 3(b), the liquid discharge hole 13 or the tip end portion 12a having the outer wall surface extending in the thickness direction is provided with a notch portion 14 for allowing the liquid to pass from the liquid discharge hole 13 or the notch portion. 14 The outer soft cover 12 is discharged (for example, refer to Patent Document 1).

However, even if the soft cover 12 including the above-described liquid discharge hole 13 or the notch portion 14 is attached to the endoscope E, the body fluid remains in the internal space formed by the base end 13a of the liquid discharge hole 13 and the front end surface Eb of the endoscope E. Sa or the internal space Sb formed by the base end 14a and the front end surface Eb of the notch portion 14 cannot completely discharge the liquid adhering to the objective lens to the outside.

[Patent Document 1] Japanese Unexamined Gazette No. 59-93413

The present invention has been made in view of the above circumstances, and it is an object of the invention to provide an endoscope adapter that can reliably discharge a liquid such as a body fluid, water, or a chemical liquid attached to a front end surface of an endoscope.

In order to achieve the above object, the present invention provides a cylindrical endoscope having an attachment portion detachably attached to a peripheral surface of a front end portion of an endoscope and a projection protruding from a front end of the attachment portion toward the front end of the endoscope. In the adapter, the attachment portion includes: an inner space opening formed in the inner peripheral surface of the protruding portion and the front end surface of the endoscope, and at least one liquid discharge groove recessed toward the inner end surface of the inner peripheral surface; and a connection In each of the liquid discharge grooves, at least one liquid discharge hole that communicates with the outer peripheral surface is formed through the attachment portion in a thickness direction, and the liquid discharge groove and the liquid discharge hole are formed to be attached to the front end of the endoscope The liquid such as body fluid, water, and liquid medicine is discharged to the outside by capillary action.

According to the invention, the liquid discharge groove is an inner space opening formed in the inner peripheral surface of the protruding portion and the front end surface of the inner mirror, and is recessed toward the inner peripheral surface of the attaching portion toward the proximal end of the attaching portion. Since the liquid discharge hole that communicates with the outer peripheral surface of the attachment portion is connected, the liquid such as body fluid, water, or chemical liquid adhering to the distal end surface of the endoscope can be reliably discharged to the outside by capillary action. Based on this, the eyesight of the endoscope can be improved and it can be smoothly advanced. Disposal.

In the present invention, it is preferable that the liquid discharge groove has a width in a range of 0.3 to 1.3 mm and a depth in a range of 0.5 to 1.5 mm, and the liquid discharge hole preferably has a diameter in a range of 0.3 to 1.3 mm. When the liquid discharge groove and the liquid discharge hole are in the size of the above range, even if the viscosity of the liquid changes due to the amount and type of body fluid, water, chemical solution, etc., the liquid can be allowed to be independent of the liquid viscosity. The capillary phenomenon is used to discharge the outside.

If one of the width of the liquid discharge groove and the depth of the liquid discharge groove and the diameter of the liquid discharge hole is lower than the above range, the liquid utilizing the capillary phenomenon can be discharged to the outside, but the discharge amount is small. Therefore, it is not fully discharged. Further, if one of the width of the liquid discharge groove, the depth of the liquid discharge groove, and the diameter of the liquid discharge hole exceeds the above range, the capillary phenomenon becomes insufficient, and the liquid may not be discharged to the outside.

Further, in the invention, it is preferable that the attaching portion is a plurality of the liquid discharge grooves provided at equal intervals. Since the plurality of the liquid discharge grooves are provided, even when the body fluid is generated in a large amount, the discharge can be smoothly performed, and the liquid discharge grooves are arranged at equal intervals, so that the entire field of view of the endoscope can be made. Better.

[Best Embodiment of the Invention]

Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Fig. 1 is a view showing the adapter for an endoscope according to the embodiment. Fig. 1(a) is a side view, and Fig. 1(b) is a front view. 2(a) and 2(b) are explanatory views showing a modification of the adapter for an endoscope according to the embodiment.

The adapter 1 for an endoscope shown in Fig. 1 includes an attachment portion 2 having a small inner diameter that is detachably attached to a peripheral surface of the distal end portion Ea of the endoscope E, and a distal end 2a of the attachment portion 2 The protruding portion 3 having a large inner diameter that protrudes toward the front side of the endoscope E is formed, for example, of a soft resin cylinder such as silicone rubber. The endoscope adapter 1 is attached so as to protrude from the end portion Ea of the endoscope E by 1 to 4 mm depending on the purpose of use. The adapter 1 for an endoscope may be configured to include a soft cover (not shown) on the distal end side 1a.

The attaching portion 2 is provided with four openings 4 for opening the inner space S formed by the inner surface 3a of the protruding portion 3 and the front end surface Ea of the endoscope E, and recessing the inner peripheral surface 2c toward the proximal end 2b. Specifically, the drain groove 4 is opened at the front end 2a of the attachment portion 2 on the wall surface between the attachment portion 2 having a small inner diameter and the projection portion 3 having a large inner diameter, and is disposed at equal intervals in the circumferential direction. Each of the liquid discharge grooves 4 may be formed to have a width W in the range of 0.3 to 1.3 mm and a depth H in the range of 0.5 to 1.5 mm. In the present embodiment, the width W of each of the liquid discharge grooves 4 is 0.8 mm, and the depth H is 0.8mm. In the present embodiment, each of the liquid discharge grooves 4 has the same size, but may be formed to have different sizes as long as they are within the above range.

Further, the attaching portion 2 is provided with at least one liquid discharge hole 5 that is connected to the outer peripheral surface 2d so as to be continuous in the middle of each of the liquid discharge grooves 4 and penetrates the attaching portion 2 in the thickness direction. Each of the liquid discharge holes 5 may be formed to have a diameter D in the range of 0.3 to 1.3 mm. In the present embodiment, the diameter D of each of the liquid discharge holes 5 is 0.8 mm.

The liquid discharge groove 4 is formed so that liquid such as body fluid, water, or chemical liquid adhering to the front end surface Ea of the endoscope E can be discharged from the opening to the proximal end 2b side by capillary action, and discharged from the liquid discharge hole 5.

Next, the state of use of the endoscope adapter 1 of the present embodiment will be described. The adapter 1 for the endoscope is used for the space between the scalpel and the mucosa of the treated portion to ensure the presence of the resection when the endoscopic mucosa is removed. In the endoscope inspection and observation, when the objective lens (not shown) provided on the front end surface Eb of the endoscope E and the mucosa of the object to be treated are close to or in close contact with each other, the focus of the object lens can be prevented from being indefinitely caused. The ocular defect caused by the reddening of the object lens output screen. In the observation of the light in the narrow zone, it is used to ensure the distance between the above-mentioned objective lens and the mucosa and mucous membrane of the mucosa.

At the time of the above-described treatment, water such as water or body fluid (blood, lymph, tissue fluid) or chemical liquid supplied to the treatment target for blood rinsing from the treatment portion adheres to the distal end surface Ea of the endoscope E. In the adapter 1 for an endoscope according to the present embodiment, the drain groove 4 is an opening in the inner space S formed by the inner surface 3a of the protruding portion 3 and the front end surface Ea of the endoscope E, and is recessed toward the base end 2b. The inner peripheral surface 2c is connected to the liquid discharge hole 5 that communicates with the outer peripheral surface 2d of the attachment portion 2. Therefore, the endoscope attachment 1 can reliably discharge the liquid generated by the liquid drain such as the body fluid, the water, or the chemical liquid adhering to the distal end surface Ea of the endoscope E to the outside. In this way, the eyesight of the endoscope E can be improved, and the surgeon can be handled smoothly.

Further, the inventors conducted various kinds of tests on the width W, the depth H of the drain groove 4, and the diameter D of the drain hole 5, and as a result, the above-mentioned range was found. The size of the circumference is more suitable for the capillary phenomenon of the above liquid to be discharged. When the liquid discharge groove 4 and the liquid discharge hole 5 are formed in the above-described range, even if the viscosity and the viscosity of the liquid change due to the amount and type of the body fluid, the water, the chemical liquid, or the like, the liquid can be reliably discharged to the outside by the capillary phenomenon.

In addition, the number of the liquid discharge grooves 4 may be one or more. However, in the present embodiment, the four liquid discharge grooves 4 are provided. Therefore, even when a large amount of the liquid is generated, the discharge can be smoothly performed. Further, since the respective drain grooves 4 are arranged at equal intervals, the entire field of view of the endoscope E can be improved.

Further, the drain groove 4 can be formed, for example, by cutting the inner peripheral surface 2c from the distal end 2a of the attaching portion 2 toward the proximal end 2b in the axial direction, and thus can be easily manufactured. Further, when the adapter 1 for the endoscope is molded by a mold, the configuration of the mold can be simplified. In the present embodiment, the liquid discharge groove 4 is formed by recessing the inner peripheral surface 2c from the distal end 2a to the proximal end 2b of the attachment portion 2 in the axial direction. However, the drainage groove 4 may be recessed from the front end 2a to the liquid discharge. Hole 5.

Further, in the present embodiment, the cylindrical body is formed with the attaching portion 2 having a small inner diameter and the protruding portion 3 having a large inner diameter. However, as shown in Fig. 2, the cylindrical body may be formed with the secondary attaching portion. (2) The enlarged diameter portion 6 which is expanded toward the protruding portion 3, and the inner space opening formed by the liquid discharge groove 4 in the inner peripheral surface 3a of the protruding portion 3 and the inner peripheral surface 6a of the enlarged diameter portion 6 and the front end surface Ea of the endoscope E . The cylinder can also discharge the liquid adhering to the front end surface Ea of the endoscope E through the liquid discharge groove 4 and the liquid discharge hole 5 through the inner peripheral surface 6a of the enlarged diameter portion 6.

Further, although not shown, the tubular body may have a cylindrical body having the same diameter as the attachment portion and the protruding portion. In addition, at this time, the liquid discharge groove 4 may also be formed as an internal space formed by the opening in the inner surface of the protruding portion and the front end surface of the endoscope. The inner peripheral surface is recessed from the front end of the protruding portion to the base end of the mounting portion over the entire length of the cylindrical body.

1‧‧‧Endoscope adapter

2‧‧‧Installation Department

2a‧‧‧Connected front end

2b‧‧‧ Attachment base

2c‧‧‧The inner surface of the attachment

3‧‧‧Protruding

3a‧‧‧The inner surface of the protruding part

4‧‧‧Draining groove

5‧‧‧Drain hole

E‧‧‧Endoscope

Ea‧‧·endoscope inner surface

S‧‧‧Internal space

Figs. 1(a) and 1(b) are explanatory views showing the adapter for an endoscope according to the embodiment.

2(a) and 2(b) are explanatory views showing a modification of the adapter for an endoscope according to the embodiment.

3(a) and 3(b) are explanatory diagrams of the adapter and the soft cover for the endoscope according to the prior art.

1‧‧‧Endoscope adapter

2‧‧‧Installation Department

2a‧‧‧Connected front end

2b‧‧‧ Attachment base

2c‧‧‧The inner surface of the attachment

3‧‧‧Protruding

3a‧‧‧The inner surface of the protruding part

4‧‧‧Draining groove

5‧‧‧Drain hole

D‧‧‧Drain hole diameter

E‧‧‧Endoscope

Ea‧‧·endoscope inner surface

Eb‧‧ ‧ endoscope front end face

H‧‧‧Drain groove depth

S‧‧‧Internal space

W‧‧‧Drain groove width

Claims (3)

An adapter for an endoscope includes a mounting portion that is detachably attached to a peripheral surface of a front end portion of an endoscope, and a cylindrical inner view that protrudes from a front end of the attaching portion toward a front side of the endoscope In the mirror adapter, the attachment portion includes: an inner space opening formed in the inner peripheral surface of the protruding portion and the front end surface of the inner mirror, and at least one liquid discharge recessed toward the inner end surface of the inner peripheral surface a groove; and at least one liquid discharge hole that communicates with the outer peripheral surface through the discharge portion in the thickness direction, wherein the liquid discharge groove and the liquid discharge hole are formed to be attached to the groove Liquid such as body fluid, water, and liquid medicine on the front end surface of the endoscope is discharged to the outside by capillary action. The adapter for an endoscope according to the first aspect of the invention, wherein the drain groove has a width in a range of 03 to 1.3 mm and a depth in a range of 0.5 to 1.5 mm, and the drain hole has a 0.3. Diameter in the range of ~1.3mm. The endoscope adapter according to the first or second aspect of the invention, wherein the attachment portion includes a plurality of the liquid discharge grooves arranged at equal intervals in the circumferential direction.