JPS6348242Y2 - - Google Patents

Description

[Detailed description of the invention] This invention sucks blood, secretions, or smoke generated by laser ablation or high-frequency ablation, which obstructs observation during endoscopy, and expels them from the body. Regarding endoscopes that can be used.

As shown in FIG. 1, a typical endoscope consists of a distal end 1, an insertion section 2, and an operating section 3.
is provided with an observation window 4, an illumination window 5, and a forceps opening 7 for protruding the forceps 6, etc., and the insertion section 2 is provided with an optical fiber bundle (not shown in FIG. 1) for observation and illumination. ), the end of the forceps channel 8 connected to the forceps opening 7 is housed, and the operation part 3 has a forceps insertion opening 9 connected to the forceps channel 8 and a forceps channel 8 connected to the forceps channel 8 and an observation window 4 transmitted through the observation optical fiber bundle. The camera is equipped with an eyepiece 10 for observing the image. Further, a cord 11 for introducing illumination light from a light source device (not shown) is connected to the operation section 3, and this illumination light is projected from the illumination window 5 through the illumination optical fiber bundle.

In this type of endoscopic examination of body cavities,
Depending on the condition of the examination site, blood or internal secretions from the tumor may cover the examination site, or may adhere to the observation window 4 and illumination window 5 of the endoscope, causing damage to the examination site. May interfere with observation. Furthermore, when irradiating a laser beam or applying high-frequency current to remove polyps, stop bleeding, or cauterize tumors such as those caused by early cancer, the smoke generated by the cauterization may obstruct observation. .

Furthermore, in a general endoscope, the forceps opening 7 provided in the endoscope tip 1 is provided on the same surface close to the observation window 4 and illumination window 5 of the endoscope. Therefore, the sucked blood, secretions, etc. flow along the observation window 4 and the illumination window 5 and are sucked, making the observed image unclear or dark. Particularly when blood is aspirated, the blood often coagulates upon contact with the air in the body cavity and sticks to the observation window 4 and the illumination window 5. Further, smoke during cauterization flows in front of the observation window 4 and the illumination window 5, causing the observed image to become unclear or dark. However, in this case, vaporized proteins, fats, etc. contained in the smoke are cooled when they come into contact with the surface of the tip of the endoscope, and adhere to the observation window 4 and illumination window 5, causing the observed image to be distorted. Not only did this result in blurred images and a reduction in the amount of illumination light, but in some cases, observation with an endoscope was impossible.

Therefore, regarding providing a suction opening in the distal end 1 for discharging blood, secretions, mucus, smoke, etc.,
It is necessary to select a part that does not cause the above-mentioned obstruction, but on the other hand, the insertion part 2 of the endoscope
In addition to the aforementioned optical fiber bundle that extends from the observation window 4 to the operation unit 3 and the optical fiber bundle that transmits light from the outside of the endoscope to the illumination window 5, there are also channels for air and water supply. Because it is necessary to accommodate a wide variety of members, such as housing a suction channel connected to the suction opening 7 separately in the insertion section 2, it is necessary to make the outer diameters of the tip section 1 and the insertion section 2 thicker. Otherwise, the insertion of the distal end portion 1 and the insertion portion 2 into the body cavity may be easily obstructed, increasing the patient's pain.
A separate channel for such suction is provided in the insertion section 2.
There is also the problem that it is undesirable to store them inside.

The present invention was made in order to solve the above-mentioned problem, and includes providing a suction opening in addition to the forceps opening 7 at a position away from the observation window 4 and the illumination window 5, and changing the direction of the suction opening. By using the forceps channel 8 as a suction channel connected to the suction opening 7, the blood, secretions, fat, etc. contained in the smoke can be removed without increasing the outer diameter of the tip 1 and the insertion portion 2. The present invention provides an endoscope that is prevented from adhering to the observation window 4 and the illumination window 5.

Hereinafter, according to the preferred embodiment shown in the attached drawings,
The present invention will be explained in detail.

FIG. 2 is a longitudinal sectional side view showing the first embodiment of the present invention. The endoscope in this embodiment is a so-called direct-viewing endoscope in which the observation direction is along the axial direction of the insertion section 2. In the figure, 12 is an optical fiber bundle for observation connected to the observation window 4, and 13 is an optical fiber bundle for illumination connected to the illumination window 5. The image of the object to be examined formed by the objective lens 14 incorporated in the optical window 4 is formed on the end face of the optical fiber bundle 12 for observation, and the fiber speed 12
The information is transmitted to the operation unit 3 via the .

In this embodiment, a suction opening 1 opens the forceps channel 8 as a flow path for suctioning blood, mucus, smoke, etc.
5 is provided on the circumferential side of the distal end portion 1 at a position away from the observation window 4, the illumination window 5, and the forceps opening 7, with the direction changed. That is, a through hole 18 branched from the forceps channel 8 that directly reaches the forceps opening 7 is inserted into the tip end 1.
The open portion of the opening is formed as a suction opening 15, and the blood, etc. sucked through the opening 15 is discharged to the outside using the forceps channel 8 as a discharge flow path. In order to perform the evacuation operation, a known suction device (not shown) is connected to the forceps insertion port 9 provided in the operating section 3, and the blood, smoke, etc. are sucked out using the negative pressure and removed from the body. Let it drain. In this way, a surface different from the surface of the distal end 1 on which observation and treatment is performed, that is, the surface provided with the observation window 4, the illumination window 5, the forceps opening 7, etc. (hereinafter referred to as the observation surface), is provided. The blood, smoke, etc. are sucked out from the surface.
The suction opening 15, which is the open part of the through hole 18, is connected to the stopper 19.
By fitting the stopper 19 into the suction opening 15 as shown by the dashed line, the forceps 6 can be protruded or retracted from the forceps opening 7. By fitting 19 into the forceps opening 7 as shown by the solid line, the forceps channel 8 is used as a discharge channel for blood, mucus, smoke, etc. sucked from the suction opening 15.

3 and 4 are longitudinal sectional side views showing a second embodiment of the present invention. In this embodiment, the configuration of the tip portion 1 is the same as that in the first embodiment, but
In place of the stopper 19 in the first embodiment, a removable hood 20 is provided for the forceps opening 7 and the suction opening 15.
This is a member that alternately closes the That is, the hood 20 is provided with a shape suitable for use with forceps as shown in FIG. 4 and a shape suitable for suction as shown in FIG. 5, and the hood 20 is exchanged depending on the purpose. This hood 20 is also designed so that the forceps opening 7 and the suction opening 15 can be closed using a single hood. The hood 20 may be provided to switch between using the forceps and suctioning by rotating the hood 20. Such a hood 20 protruding from the front end surface of the distal end portion 1 has a suction opening 15, regardless of whether it is a two-way exchange type or a one-way rotation type.
This helps prevent blood, mucus, smoke, etc. from approaching the observation surface.

FIG. 5 is a longitudinal sectional side view showing a third embodiment of the present invention. In this embodiment, most of the forceps opening 7 is always closed, leaving an opening approximately the same as the outer diameter of the treatment tool such as the laser probe 21 to be inserted. When the laser rod of the laser probe 21 is inserted into the forceps opening 7, almost no gap remains in the forceps opening 7. Therefore, if suction is performed in this state, the object to be aspirated will not be suctioned through the forceps opening 7 provided on the observation surface, but will be suctioned through the suction opening 15 provided on the peripheral side facing away from the observation surface. . In this embodiment, the forceps opening 7 and the suction opening 15
There is no need to close the space with a stopper 19, a hood 20, or the like.

FIG. 6 is a longitudinal sectional side view showing a fourth embodiment of the present invention. The configuration of the tip portion 1 in this example is as follows:
Although similar to those of the first and second embodiments,
A feature is that the forceps opening 7 is provided with a valve 24 that opens outward. That is, at the time of suction,
Due to the pressure inside the body cavity and the pressure inside the forceps channel 8, which is reduced to a low pressure by the suction device, the valve 24 comes into close contact with the front end surface of the distal end portion 1 and closes the forceps opening 7.
When the forceps are used, the valve 24 is easily separated from the front end surface of the distal end portion 1 due to the pressure applied to the forceps, allowing the forceps 6 to protrude.

In the above embodiments, the present invention is applied to a so-called direct-viewing endoscope in which the observation surface is located at the front end of the insertion section 2 in the axial direction. Of course, the present invention is not limited to endoscopes, and can also be applied to side-viewing endoscopes such as the one shown in FIG. In order to apply the present invention to such a side-viewing endoscope, it is necessary to guide the through hole 18 branching from the forceps channel 8 to the front end surface of the distal end portion 1, although not shown in the figure. The suction opening 15 may be formed on the front end surface to provide an open portion, or the suction opening may be formed on another portion of the circumferential surface opposite to the observation surface located on a part of the circumferential surface to provide an open portion. Therefore, it will be easily understood that the intended purpose of the present invention is similarly achieved and the expected effects are exhibited.

As described in detail above, according to the endoscope of the present invention, the suction opening is provided at a position away from the observation surface of the endoscope and in a direction different from the observation surface, so that secretions to be aspirated, Dirt, blood, etc. will not flow along the observation window or lighting window. Therefore, since the observation window and the illumination window are not contaminated, the observed image will not become unclear or the amount of illumination light will not decrease. In addition, the smoke generated during cauterization, such as when removing polyps using a laser beam or high-frequency current, does not flow over the observation surface, so vaporized proteins or fats contained in this smoke may come into contact with the observation window and the illumination window. , there is no risk of it sticking.

Furthermore, in order to aspirate and discharge these blood, secretions, mucus, smoke, etc. from the body, a conduit that serves as a suction channel is not stored separately in the insertion section, but a forceps channel is used for this purpose. This eliminates the need to increase the outer diameter of the distal end and insertion section of the endoscope when they are inserted into a body cavity, making them easier to operate and without increasing the pain for the patient. It has the advantage that the desired purpose can be achieved without using an endoscope.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing the general appearance of a general endoscope.
FIG. 2 is a longitudinal side view showing the first embodiment, FIGS. 3 and 4 are longitudinal side views showing the second embodiment, FIG. 5 is a longitudinal side view showing the third embodiment, and FIG. 6 is a longitudinal side view showing the third embodiment. It is a longitudinal side view showing a 4th example. 1...Tip part, 2...Insertion part, 3...Operation part,
4... Observation window, 5... Illumination window, 7... Forceps opening, 8... Forceps channel, 15... Suction opening,
18...through hole, 19...stopper, 20...hood,
24... Valve.

Claims (1)

[Claims for Utility Model Registration] (1) Consisting of a distal end portion 1, an insertion portion 2, and an operating portion 3,
The distal end portion 1 is provided with an observation window 4, an illumination window 5, and a forceps opening 7, and communicates with a forceps channel 8 that is connected to the forceps opening 7, is housed in the insertion section 2, and reaches the operation section 3. , and a suction opening 15 opened in the tip part 1 using this as a suction flow path,
On a plane different from the end face where the observation window 4 and the illumination window 5 are located, occupying a position away from the end face occupied by each of these windows 4 and 5, and in a direction different from the optical axis direction of those windows. An endoscope characterized by being open toward the target. (2) The observation window 4, the illumination window 5, and the forceps opening 7
is provided on the front end surface of the distal end portion 1, and the suction opening 15 is opened on the circumferential surface of the distal end portion 1. (3) The observation window 4, the illumination window 5, and the forceps opening 7
is provided on the circumferential side of the distal end portion 1, and the suction opening 15 is opened on the front end surface of the distal end portion 1. (4) The observation window 4, the illumination window 5, and the forceps opening 7
is provided on one side of the circumferential surface of the distal end portion 1, and the suction opening 15 is opened on the other side of the side circumferential surface of the distal end portion 1. mirror.