JPH0538321A - Cap incorporated with nozzle to be fitted to endoscope catheter - Google Patents

Abstract

PURPOSE:To cleanly and surely feed air and water by providing such an arrangement that when a cap incorporated with a nozzle is fitted to a catheter, the nozzle is communicated with a catheter pipe line, and when the pipe line is connected to a forceps channel at the front end of an endoscope, the jet port of the nozzle faces an objective lens. CONSTITUTION:When a catheter 12 is fitted into a fitting hole 15 in a cap 11 incorporated with a nozzle, a nozzle pipe 17 of the cap 11 on the rear end side, is inserted into an air and water feed pipe line 14 in the catheter 12, and the cap 11 is bonded to the catheter 12 in a water tight manner. In this arrangement, the rear end part of the catheter 12 is inserted into the opening 6 of the front end part of the endoscope, and is led to a forceps channel hole in a manipulating part, and a tube for feeding air or water is connected to the rear end of the catheter. In this condition, the jet port of the nozzle pipe 17 is set to face an objective lens 4, and accordingly, the objective lens 4 can be cleaned, and water can be removed therefrom when air or water is fed from the jet port 17a. With this arrangement which is disposable and which is simple in its structure, it is possible to cleanly and surely feed air or water with a simple structure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap with a nozzle attached to an endoscope catheter for supplying air and water to an objective lens of an endoscope.

[0002]

2. Description of the Related Art In recent years, by inserting an elongated insertion portion into a body cavity, it is possible to observe internal organs in the body cavity and, if necessary, to perform various therapeutic treatments using a treatment instrument inserted into a treatment instrument channel. Endoscopes are widely used. Further, it is used not only for medical purposes but also for industrial purposes for observing and inspecting objects in pipes of boilers, machines, chemical plants, etc., or machines.

Some endoscopes have a forceps channel through which various treatment tools such as forceps can be inserted, or an air / water supply conduit.

Further, various electronic endoscopes using a solid-state image pickup device such as a charge coupled device (CCD) as an image pickup means at the tip of the insertion portion are also used.

By the way, in an endoscope, particularly a medical endoscope, when it is inserted into a body cavity, dirt is adhered to the observation window such as body fluid, which hinders observation. Therefore, the objective lens is washed. There is a need.

[0006] The distal end forming portion 31 of the endoscope shown in FIG.
An objective optical system 33 including an objective lens 33a attached to the tip of the observation window and an image guide 34 are provided to enable visual observation. An air supply / water supply nozzle 35 is provided in the distal end configuration portion 31 of the endoscope, and water is supplied and air is supplied from an ejection port 35a of the air supply / water supply nozzle 35 via an air supply / water supply conduit 36. Thus, the objective lens 33a is washed and drained. The air supply can also be used to send air into the body cavity so as to separate the body wall from the endoscope distal end configuration part in order to observe the test part in detail.

Further, Japanese Utility Model Publication No. 64-6804 discloses that
It is disclosed that the tip cover of the tip part is detachably formed and the air / water feeding nozzle is integrally provided on the tip cover.

[0008]

It is difficult to clean the conventional air / water supply nozzle 35 because it is fixedly provided or the vicinity of the jet port 35a is bent. Further, if the attached dirt is left as it is or immersed in a chemical solution, the dirt may be solidified inside the nozzle.

When the nozzle is clogged, not only cannot the objective lens be washed, but it is often difficult to remove the solidified contaminants by liquid transfer.

Further, the dirt clogging the inside of the nozzle was a source of propagation of various bacteria and was extremely unsanitary. And
It was difficult to sterilize when the waste was hardened and clogged.

On the other hand, in Japanese Utility Model Laid-Open No. 64-6804, since the tip cover integrally provided with the nozzle can be attached and detached, the nozzle can be cleaned relatively easily. Since it is necessary to securely and precisely fit the objective optical system, the forceps channel, the air supply / water supply conduit, etc. provided on the side, it becomes expensive in manufacturing.
It was not suitable for single use.

The present invention has been made in view of the above-mentioned points, and always provides clean and reliable air / water supply, has a simple structure for disposable use, and is an inexpensive catheter for endoscopes. An object of the present invention is to provide a cap with a nozzle that is attached to the.

[0013]

A cap with a nozzle attached to an endoscope catheter of the present invention can be inserted into a forceps channel penetrating into an endoscope having an objective lens at its distal end, and can be inserted inside. A cap with a nozzle that is fixedly or detachably attached to the end of a catheter having a duct, and has a nozzle for performing at least one of air supply and water supply to the objective lens of the endoscope,
When the cap with the nozzle is attached to the catheter, the nozzle communicates with the conduit of the catheter,
When the cap with the nozzle is fitted into the opening of the forceps channel at the tip of the endoscope, the ejection port of the nozzle is configured to face only the objective lens.

[0014]

With this structure, the nozzle-equipped cap is fixedly or detachably attached to the catheter so that the nozzle of the nozzle-equipped cap communicates with the conduit of the catheter.
Insert the catheter equipped with the nozzle cap into the forceps channel of the endoscope, and fit the nozzle cap into the opening of the forceps channel to position the nozzle toward the objective lens of the endoscope. At least one of air supply and water supply is performed on the objective lens.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 3 shows the distal end configuration part 1 of the endoscope,
This endoscope includes a distal end forming section 1 configured in order from the distal end side,
The insertion portion is composed of a bendable bending portion 2, a flexible tube portion (not shown) having flexibility, and an operation portion (not shown) connected to a rear end of the insertion portion. A flexible universal cord (not shown) is laterally extended from the operation portion, and a connector is provided at an end portion of the universal cord. Further, at the rear end portion of the operation portion, an observation portion (not shown) capable of observing an endoscopic image with the naked eye is provided. A light source device (not shown) is connected to the connector, and illumination light is supplied from two illumination windows 3 provided on the tip surface of the tip forming portion 1 shown in FIG.

At the rear ends of the illumination windows 3 and 3, the emission ends of two light guides (not shown) are arranged, and these two light guides are inserted through the insertion portion, the operation portion and the universal cord. An incident end is connected to each of the light source devices.

In addition to the two illumination windows 3, an observation window 4 and a forceps channel 5 for fitting a cap with a nozzle attached to an endoscope catheter, which will be described later, are provided on the distal end surface of the distal end forming section 1. The opening 6 is provided.

An objective optical system (not shown) is mounted inside the observation window 4, and an incident end of an image guide fiber (not shown) is arranged at the rear end side of the objective optical system. The image guide fiber has its emission end connected to the observation section to enable observation of an endoscopic image.

At the rear end of the opening 6 of the forceps channel 5, a channel tube 7 constituting the forceps channel 5 is formed.
Is connected to a forceps channel port (not shown) provided on the side portion of the operation portion, so that various treatment tools can be inserted. Further, the opening 6 is asymmetrical, for example, formed in a substantially fan shape in the illustrated example, and limits the mounting position of the catheter with a nozzle for an endoscope to one direction.

On the other hand, as shown in FIGS. 1 and 3, the cap 11 with a nozzle is provided at the end of the catheter 12 for an endoscope.
It is detachably attached, or may be fixed by adhesion.

The catheter 12 is made of, for example, a flexible resin and is an elongated tube that is inserted into the channel tube 7 and has a length that can reach the forceps channel opening. Further, the catheter 12 has a large forceps conduit 13 through which a treatment tool such as forceps can be inserted, and a cross-sectional shape of, for example, a substantially crescent, and an air supply / water supply conduit 1 of small diameter
4 and 4 in the axial direction. Incidentally, instead of the forceps channel 5, a dedicated air supply / water supply conduit may be used.

The nozzle cap 11 is formed in a substantially cylindrical shape from, for example, a hard resin and has a fan-shaped cross section so that it can be fitted into the opening 6 of the forceps channel 5. Further, the cap 11 with nozzle is shown in FIG.
From the right (rear end) side in the middle to the middle in the axial direction, there is a fitting hole 15 shown in FIG. 2 into which the distal end portion of the catheter 12 can be fitted. Furthermore, the nozzle cap 11 is shown in FIG.
From the left (tip) side to the fitting hole 15, the large diameter forceps hole 16 is axially penetrated in the upper part, and the nozzle pipe is formed in the small diameter hole penetrating in the axial direction in the lower part of the drawing. 17 is attached and fixed. The nozzle tube 17 is bent at its tip end side to form an ejection port 17a toward the outer peripheral side of the cap 11 with nozzle, while its straight rear end is projected to the axial rear end side from the cap 11 with nozzle. There is.

Fitting hole 15 of cap 11 with nozzle
When the catheter 12 is attached, the forceps hole 16 of the nozzle cap 11 and the forceps conduit 13 of the catheter 12 are formed to have substantially the same diameter and communicate with each other. Further, by mounting in the same manner, the rear end side of the nozzle tube 17 of the cap 11 with a nozzle is attached to the catheter 12
It is designed to be inserted into the air / water supply conduit 14 of the above.
The nozzle cap 11 and the catheter 12 can be made more watertight by adhering the cap 11 with the nozzle fitted and fitted to each other.

With this structure, the opening 6 of the endoscope tip forming portion 1 is formed.
From the above, the rear end of the catheter 12 to which the nozzle cap 11 is fixed is inserted and guided to the forceps channel hole of the operating section. At this time, the cap 11 with nozzle is opened 6
The catheter 12 is continuously inserted until it is completely fitted and attached to the. Then, the other end of a connection tube (not shown) whose one end is bifurcated is connected to the rear end of the catheter 12 for supplying air and water. Furthermore, an air supply pump (not shown) is connected to one of the two ends of the connecting tube, and a water supply tank is connected to the other end of the two ends to enable air supply and water supply.

Further, with the nozzle cap 11 fitted in the opening 6, the ejection port 17a of the nozzle tube 17 faces the objective lens 4. Therefore, the objective lens 4 can be washed or drained by air or water from the ejection port 17a of the nozzle tube 17 as needed. Furthermore, this catheter with nozzle 1 for endoscopes
Since 0 also has a conduit for forceps, it is possible to insert necessary forceps and take necessary treatments such as excision of an inspected part.

In this embodiment, the cap 11 with the nozzle attached to the endoscope catheter 12 is attached to the distal end forming section 1 after the observation of the endoscope and the supply of air and water to maintain the observation function are completed. Since it can be removed from the side, it can be easily disposable because it has a simple structure and can be manufactured at low cost with resin or the like. Therefore, if necessary, the cap 11 with a nozzle attached to the endoscope catheter 12 may be replaced, or even if the catheter 12 is fixed, if the catheter 12 is replaced, the procedure such as cleaning is unnecessary. Therefore, it is possible to always perform clean and safe air and water supply. If the catheter 12 is formed to be long, the tip side may be cut off even when the nozzle cap 11 is fixed to the catheter 12. In this case, it only needs to be replaced with a new nozzle cap 11, and the catheter 12 can be used several times, which is more economical.

FIG. 4 is an external view of a cap with a nozzle and an endoscope to be mounted on the endoscope catheter according to the second embodiment. The nozzle cap mounted on the endoscope catheter of the present embodiment is the nozzle cap 1 of the first embodiment.
Although 1 had both the nozzle tube 17 and the forceps hole 16, it has no forceps hole. Other configurations and operations similar to those of the first embodiment are designated by the same reference numerals and description thereof will be omitted.

As shown in FIG. 4, there is shown a nozzle cap 22 fitted to a catheter 21 inserted through the channel tube 7 of the endoscope. This catheter 21
The tube may be a simple tube as long as it has an insertion duct, and when the nozzle cap 22 is not attached, it serves as a guide for the forceps while protecting the tube mouth of the test part from the forceps, for example.

The nozzle cap 22 has, for example, a gourd-shaped cross section and a substantially cylindrical cap body 23.
And a nozzle tube 24 protruding in the axial direction on the front side of the cap body 23.

The cap body 23 fits the catheter 21 from the rear end side up to the midway in the axial direction, and the rear end side hole of the nozzle tube 24 and the insertion conduit of the catheter 21 communicate with each other. Has become.

Further, as shown in FIG. 4, an opening 25 of the same shape is formed on the front surface side of the distal end forming portion 1 of the endoscope so as to fit with the cap body portion 23. This opening 25
Constitutes a forceps channel of the endoscope and is connected to and communicates with the channel tube 7 shown in FIG. Further, with the cap body 24 fitted in the opening 25 of the endoscope, the objective lens 4 and the nozzle tube 24 having a bent tip are provided.
The jet outlet 24a of the above is opposed. Other configurations and effects are the same as those in the first embodiment, and the description thereof will be omitted.

The present invention can be applied to electronic endoscopes as well as optical fiber endoscopes. Further, although the direct-viewing type is shown as the endoscope leading end component, it can be applied to the side-viewing type and the perspective type.

[0033]

As described above, according to the cap with a nozzle attached to the catheter for an endoscope of the present invention, the cap can be disposable, has a simple structure, and can be manufactured at low cost.
It has the effect of always supplying clean and reliable air and water.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a cap with a nozzle attached to an endoscope catheter according to a first embodiment.

FIG. 2 is a cross-sectional view of the cap with a nozzle of FIG. 1 taken along the line AA.

FIG. 3 is an explanatory diagram showing a mounting state of a cap with a nozzle mounted on a endoscope endoscope and an endoscope.

FIG. 4 is an external view of a cap with a nozzle mounted on an endoscope catheter according to a second embodiment and an endoscope.

FIG. 5 is a conventional endoscope with a nozzle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Tip structure part 5 ... Forceps channel 10 ... Catheter with nozzle for endoscope 11 ... Cap with nozzle 12 ... Catheter 13 ... Pipe line for forceps 14 ... Air / water supply pipe 17 ... Nozzle pipe

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuhiko Omagari 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Co., Ltd. (72) Ichiro Nakamura 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd. (72) Inventor Nobuhiko Washizuka 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd. (72) Inventor Yoshinao Daimei 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd.

Claims (1)

[Claims] 1. A cap with a nozzle which can be inserted into a forceps channel penetrating an endoscope having an objective lens at its tip and which is fixedly or detachably attached to the end of a catheter having a conduit therein. When the objective lens of the endoscope has a nozzle for performing at least one of air supply and water supply, and the cap with the nozzle is attached to the catheter, the nozzle communicates with the conduit of the catheter. On the other hand, when the cap with the nozzle is fitted into the opening of the forceps channel at the tip of the endoscope, the ejection port of the nozzle is configured to face only the objective lens. Cap with nozzle attached to the catheter for use.