JPH019524Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an endoscope equipped with two systems of suction devices.

The endoscope is equipped with a suction device to exhaust out of the body cavity bleeding blood in the body cavity, a contrast agent injected during X-ray imaging, gas generated in the body cavity, etc., which impede observation. As shown schematically in FIG. 1, this type of suction device includes a suction channel 3, which is formed by branching the forceps channel 2 of an endoscope 1 at the operating section 1a of the endoscope, and a suction pump (not shown). It is connected via a suction operation section 4. As for the mode of branching between the forceps channel 2 and the suction channel 3, in the one shown in FIG. 1, the suction channel 3 is straight and the forceps channel 2 is bent inside the operating part 1a, but in FIG. There is also an endoscope in which the forceps channel 2 is straight and the suction channel 3 is branched, as shown with the exterior of the endoscope omitted.

In addition, in a laser scalpel used for intrabody cavity treatment using an endoscope, a power laser generated by a laser generator is transmitted through a laser fiber of a power laser transmission tube connected to the generator, and the tip of the laser fiber is Irradiate the affected area from the irradiation end face formed on the surface. At that time, if laser irradiation is performed with tissue scattered by the irradiation or evaporated blood etc. adhering to the irradiation end face,
Since the irradiation end face is heated together with the deposits and the irradiation end face is destroyed, it is necessary to prevent the tissue or blood from adhering to the irradiation end face. Also,
When the affected area is covered with bleeding blood, it is desirable to remove the bleeding blood in order to make the affected area easier to see and to prevent the bleeding blood from evaporating. Therefore, as shown in FIG. 3, a gap 8 is formed by attaching a fixture 7 between the laser fiber 5 and a protective tube 6 that protects the laser fiber 5 from damage caused by external forces.
is used as a channel for the above-mentioned air supply,
An air supply device (not shown) attached to a laser generator (not shown) supplies air or carbon dioxide gas to the tip of the laser fiber 5 to cool the tip. The above-mentioned adhesion is prevented by blowing Qi toward the affected area. Therefore, in order to prevent the internal pressure in the body cavity space from increasing due to the above-mentioned air supply, a suction device is required that sucks the supplied air, carbon dioxide gas, etc. from the space and discharges it to the outside of the body cavity.

For this purpose, as shown in Figs. 1 and 2, as a suction system for the laser scalpel, an adapter 9 is attached to the forceps port 2a of the forceps channel 2 into which the laser scalpel is inserted, and a separate suction pump (see Fig. 2) is attached to the adapter 9. A suction tube 10 from (not shown) is connected, and suction is performed using the gap between the forceps channel 2 and the protection tube 6 of the laser scalpel.

However, the above-described suction device has the following problems.

Two systems of suction devices share one channel for suction, so when both suction devices are used for suction at the same time, the resistance of the channel increases because the amount of air passing through the channel increases. This results in a decrease in suction power. Further, when only one suction device is operated, the amount of suction from the body cavity may be reduced due to the outside air flowing in from the other suction system. If the suction force becomes weak in this way, it becomes difficult to remove deposits that have adhered to the objective lens window or the test area, which may impede observation and treatment.

The present invention was made to solve such problems, and provides an endoscope equipped with a suction operation section that communicates the suction channel of the endoscope with only one of two systems of suction devices. It is something to do.

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

FIG. 4 is a diagram schematically showing the configuration of an endoscope 11 that is an embodiment of the present invention. In this embodiment, a suction operation section 14 is attached to the suction channel 13 branched from the forceps channel 12 of the endoscope 11 in the operation section 11a of the endoscope, and two suction pumps (not shown) are attached to the suction operation section 14. ) are connected to the suction pipes 15, 16 from the In the one shown in FIG. 4, the forceps channel 2 is bent inside the operating part 1a, but as shown in FIG. 5 with the exterior of the endoscope omitted, the suction channel 3 is branched. There are some that did. 6 and 7 are longitudinal sectional side views showing an enlarged view of the suction operation section 14, which will be described in detail later.
FIG. 6 shows that the suction channel 13 is connected to the first suction pipe 15.
FIG. 7 shows a state in which the suction channel 13 is connected to the second suction pipe 16. The suction operation unit 14 is a type of piston valve consisting of a cylinder 17 and a piston 18. A suction channel 13 is provided at the bottom of the cylinder 17 (top left in FIG. 6), and a first suction pipe 15 and a first suction pipe 15 are provided on the peripheral wall of the cylinder 17. A second suction tube 16 is connected. The piston 18 has a large diameter part 18a with a large diameter on the outside, and a small diameter part 18c with a small diameter between the tip part 18b facing the bottom of the cylinder 17 and the large diameter part 18a. The piston 18 is constantly urged by the spring 19 in the direction away from the cylinder 17 (to the upper right in FIG. 6), so that the large diameter portion 18a of the piston 18
7 and restricts the movement of the piston in the radial direction. The piston 18 has a tip 18
A communication hole 20 that communicates b with the circumferential surface of the large diameter portion 18a.
However, it is usually provided at a position facing the first suction tube 15. Large diameter portion 18 in which communication hole 20 is open
On the peripheral wall of a, there are two O-rings 2 across the opening.
1 and 21 are fitted. An annular projection 22 is provided on the circumferential surface of the tip 18b of the piston 18, and an O-ring 23 fitted to the annular projection 22 and the cylinder 17
A projecting edge 24 provided in an annular shape on the inner circumferential wall of the spring 19 abuts against it under the biasing force of the spring 19, and normally closes the part,
The suction channel 13 and the second suction pipe 16 are cut off.

Furthermore, a ventilation hole 25 is provided in the upper part of the cylinder 17 (upper right side in FIG. 6) by boring through the peripheral wall. The diameter of the upper part of the cylinder 17 is made slightly larger to match the diameter of the O-rings 21, 21, and this allows outside air to flow in from the vent hole 25 through the gap formed between the piston 18 and the cylinder 17. The flow path is The ventilation hole 25 is provided between the first suction pipe 15 and the second suction pipe 16, and is usually located between the piston 18 and the second suction pipe 16.
It communicates with the second suction tube 16 through the space formed by the small diameter portion 18c.

Cylinder 1 above the flange 24 (top right in Figure 6)
A second suction pipe 16 is connected to the seventh peripheral wall.

In the endoscope having the above-described configuration, the cylinder 1
8 is biased by a spring 19, and normally the piston 18 is in a state of protruding from the cylinder 17 as shown in FIG. The first suction pipe 15 and the suction channel 13 are communicated with each other. The second suction pipe 16 is connected to the O-ring 23 of the piston 18.
The projecting edge 24 of the cylinder 17 comes into contact with the cylinder 17 to cut off the communication with the suction channel 13, so that outside air flowing in through the ventilation hole 25 is sucked.

FIG. 7 shows a state in which the piston 18 is pushed into the cylinder 17 against the biasing force of the spring 19. In this state, the projecting edge 24 and the O-ring 23
The second suction pipe 16 and the suction channel 13 are brought into communication with each other, and the opening of the communication hole 20 is closed by the O-rings 21, 21 and the circumferential wall of the piston 18, and the first suction pipe 15 Outside air is sucked in from the vent hole 25 through the gap between the cylinder 17 and the piston 18.

According to the endoscope according to the present invention, suction can be performed by switching between two suction systems, for example, the endoscope's original suction system and the laser scalpel suction system, depending on the usage status. When suctioning the endoscope, there is no need to worry about external air flowing from the laser scalpel's suction system into the endoscope's original suction system and weakening the suction force of the endoscope's suction system. Therefore, a clear field of view can be obtained through reliable suction, and accurate observation and treatment can be performed. In addition, in any suction state, the unused suction device is communicated with the outside through the ventilation hole, so unnecessary load is not placed on the device and there is no negative impact on the suction system when it is in use. I have nothing to give.

[Brief explanation of the drawing]

Figures 1 and 2 are diagrams showing the configuration of a conventional endoscope, Figure 3 is a longitudinal cross-sectional side view showing the structure of a transmission tube of a laser scalpel, and Figures 4 and 5 are diagrams showing an embodiment of the present invention. Figures 6 and 7 showing the structure are longitudinal sectional side views showing the suction operation section of the same embodiment. 1,11... Endoscope, 2,12... Forceps channel, 3,13... Suction channel, 4,14...
...Suction operation unit, 15, 16...Suction tube, 17...
Cylinder, 18...Piston.

Claims (1)

[Claims for Utility Model Registration] (1) A suction operation section consisting of a piston and a cylinder, and the suction operation section includes a suction channel leading to the distal end of the endoscope, a first suction tube, and a second suction tube. The endoscope connects the first suction tube or the second suction tube to the suction channel by changing the position of the piston relative to the cylinder. (2) The endoscope according to claim 1, wherein the suction channel branches off from the forceps channel at the operating section of the endoscope. (3) Scope of Utility Model Registration Claim No. (1), wherein the first suction tube is connected to a suction pump of a laser scalpel, and the second suction tube is connected to a suction pump of an endoscope.
The endoscope described in section.