JPH0618548B2 - Direct view endoscope suction mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a direct-view endoscope having an observation window, an illumination window, and the like attached to the distal end surface of an insertion portion and a suction port provided on the same surface. The present invention relates to a suction mechanism.

[Conventional technology]

In the suction mechanism of the conventional direct-view endoscope having a suction port, a pipe line that follows the suction port in a direction orthogonal to the distal end surface of the insertion portion is formed, and the suction port is formed near the center of the distal end surface. It was

[Problems to be solved]

For example, in a direct-viewing endoscope that is inserted into the bronchus, when trying to aspirate sputum, mucus, etc., the conventional suction mechanism has a suction port near the observation window. There is a risk that mucus or the like will adhere and cause a significant obstruction to observation. In addition, since the sputum and mucus are attached to the inner wall of the bronchus, there is a distance between the suction port of the conventional suction mechanism and the inner wall where the sputum and mucus are attached, so that the sputum and mucus can be sucked efficiently. I couldn't.

Further, Japanese Utility Model Application Laid-Open No. 58-157102 discloses an example in which a suction opening is provided in a direction different from that of an observation or illumination window. Has a suction opening on its outer peripheral surface. Furthermore, JP-A-60-1
No. 37343 discloses that the normal direction of the opening surface of the tip of the suction port and the direction of the central axis of the field of view of the target observation optical system intersect and the front surface of the objective window of the optical system and the opening surface of the tip of the suction port are less than 180 °. Those that are designed to intersect are described.

[Problems to be Solved by the Invention]

The one disclosed in Japanese Utility Model Laid-Open No. 58-157102 has an L-shaped portion in which a channel following a suction opening is substantially right angle,
This part is a sharp bending point. If there is a sharp bending point, it is difficult to suck foreign matter smoothly. Further, in the one disclosed in Japanese Patent Laid-Open No. 60-137343, the suction pipe line extends straight toward the suction port, but this suction port is provided in a portion near the outer peripheral surface of the tip, and therefore the suction pipe line is provided. Is also formed near the outer peripheral surface. Although the tip of the endoscope is hard, the angle part that follows this tip is bent, so it is necessary to provide a bending member near the outer peripheral surface of the tube. Even if the suction pipe line can be provided near the shaft, the suction pipe line must be formed at a position close to the axis. The suction pipe line will be formed at a position where the bending member is avoided, but the angle part must be thickened so that it is on a straight line with the suction port at a position far from the axis. If the part is thickened, the patient will suffer.

Therefore, the present invention eliminates the risk that the sputum, mucus, etc. will adhere to the observation window and cause significant obstruction to observation, smoothly sucks the sputum, mucus, etc., and does not need to increase the thickness of the insertion portion. An object is to provide a suction mechanism for a direct-viewing endoscope.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, in the present invention, the suction port opens toward the outer peripheral surface of the insertion portion, and the pipe line near the suction port is gently inclined so as to approach the axial center of the insertion portion as the distance from the suction port increases. At the same time, a pipe line following this is provided near the axis and parallel to the axis, and the opening surface of the suction port is inclined so as to face obliquely outward.

[Action]

In the present invention, in the case of the endoscope for the bronchus, the suction port moves away from the observation window and opens toward the outer peripheral surface of the insertion part, and the duct in the vicinity of the suction port is inclined, so that it adheres to the inner wall of the bronchus. It becomes easy to suck the sprouts and mucus. In particular, since the pipe in the vicinity of the suction port is gently inclined, there is no sharp bending point in the pipe and smooth suction is performed. Since this inclined conduit continues to the straight conduit near the axis, it is not necessary to thicken the angle portion near the tip of the insertion portion. Furthermore, since the opening surface of the suction port is inclined and directed obliquely outward, suction is facilitated. Further, since the sputum, mucus, etc. can be surely sucked, it is possible to prevent the spout, mucus, etc. from adhering to the observation window and significantly hindering observation.

〔Example〕

Preferred embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, an observation window 3, an illumination window 4 (see FIG. 2) and a suction port 5 are provided on the tip surface 2 of the insertion portion 1. The suction port 5 provided on the tip end surface is opened toward the outer peripheral surface of the insertion section 1, that is, at a position away from the observation window 3, and the axis of the insertion section 1 is moved as the pipe line 6 near the suction port 5 moves away from the suction port 5. It is gently tilted so that it approaches the heart. This inclined conduit 6 is connected to a straight conduit 7. Further, the opening surface of the suction port 5 is formed so as to be inclined so as to face obliquely outward.
That is, the distal end surface 2 of the insertion portion 1 is not formed into a flat surface, but the portion where the suction port 5 is formed is cut obliquely. When sucking sputum or mucus with the direct-viewing endoscope having the structure of the insertion portion 1 configured as described above, when suction is performed at a hand operation portion (not shown) of the endoscope, Since they are usually attached to the inner wall of the bronchus, they are smoothly sucked from the suction port 5 opened at a position close to the inner wall through the inclined pipe line 6 and discharged from the discharge port of the endoscope outside the body. It

The distal end portion of the insertion portion 2 shown in FIG. 1 is hard, and the subsequent portion of the insertion portion 2 (the portion extending in the right-hand direction in the drawing) is formed as a bendable angle portion.

In the second embodiment shown in FIG. 3, when a treatment tool such as forceps is also used, an example is shown in which the straight conduit 7 is also used as a suction conduit and an insertion conduit such as forceps. The straight conduit 7 is provided with a treatment tool insertion conduit 8 that extends linearly from the conduit 7.
The pipe 8 which is connected to the inclined pipe 6 is shown. When suctioning the mucus or mucus from the suction port 5 through the conduit 6 and the straight conduit 7, it is necessary to block the opening of the treatment instrument insertion conduit 8. A rubber cap 10 having a slit 9 as shown is attached. When a treatment tool such as forceps is inserted, the forceps can be taken out through the slit 9 of the cap 10 through the treatment tool insertion conduit 8.

The third embodiment shown in FIG. 5 also shows that the treatment instrument insertion conduit 8 is formed, and as a means for closing the opening of the treatment instrument insertion conduit 8 at the time of suction, the opening portion is always closed by the spring 11. The thing which attached the lid part 12 is shown.

The fourth embodiment shown in FIG. 6 also shows the one in which the treatment instrument insertion conduit 8 is provided, and one of the two conduits 6 and 8 is opened when the rotary valve 13 is rotated to close the other. The rotary valve 13 can be operated with a wire 14 at a hand-held operation unit.

In the embodiment shown in FIG. 3 and subsequent figures, when the treatment instrument insertion pipe 8 is provided separately from the inclined suction passage 6 and the straight pipe 7 is used together, the treatment instrument insertion pipe is used during suction. Although various means for closing the conduit 8 are shown, it is of course possible to employ other means not shown.

〔effect〕

As described above, according to the present invention, the suction port opens toward the outer peripheral surface of the insertion portion, and the pipe line near the suction port is gently inclined so as to approach the axial center of the insertion portion as the distance from the suction port increases. Along with this, a pipe line that follows this is provided closer to the axis and parallel to the axis, so for example, in the case of an endoscope for bronchi, it is possible to smoothly suck the sputum and mucus, and the sputum and mucus. As a result of smooth aspiration of the particles, there is no possibility that sprouts, mucus or the like will adhere to the observation window and will not cause any significant obstruction to the observation. Since the straight pipe line is closer to the axial center than the outer peripheral surface of the insertion portion, it is not necessary to thicken the insertion portion, especially the angle portion. Moreover, since the opening surface of the suction port is inclined so as to face obliquely outward, the suction effect is further enhanced. Further, even in an endoscope that requires the insertion of a treatment tool, the suction conduit is provided in a branched manner, and the opening of the treatment tool insertion conduit is closed at the time of suction. Suction can be done.

[Brief description of drawings]

FIG. 1 is a sectional view showing a first embodiment, FIG. 2 is a front view showing a distal end surface of an insertion portion, and FIG. 3 is a sectional view showing a second embodiment.
FIG. 4 is a perspective view showing the cap used in FIG. 3, FIG. 5 is a sectional view showing a third embodiment, and FIG. 6 is a sectional view showing a fourth embodiment. 1 ... Insertion part, 2 ... Tip surface, 3 ... Observation window, 4 ... Illumination window, 5 ... Suction port, 6 ... Pipe line.

Claims (2)

[Claims] 1. A suction mechanism of a direct-viewing endoscope in which an observation window, an illumination window, etc. are attached to the distal end surface of the insertion section, and a suction port is provided on the same surface, in which the suction port is closer to the outer peripheral surface of the insertion section. And gently incline the duct in the vicinity of the suction port so that it approaches the axis of the insertion section as it moves away from the suction port, and the duct that follows this is provided near the axis and parallel to the axis. A suction mechanism for a direct-view endoscope, wherein an opening surface of the suction port is inclined so as to face obliquely outward. 2. A straight pipe line is connected to the inclined pipe line,
Providing a treatment instrument insertion line that extends linearly from the straight line,
2. The suction mechanism for a direct-view endoscope according to claim 1, further comprising means for separately using the pipe line and the inclined pipe line and for closing the treatment instrument insertion pipe line during suction.