JPH045946A - Endoscope device - Google Patents

Abstract

PURPOSE:To hold the suction quantity and the press-feeding quantity in a prescribed state, and to prevent gas from being fed excessively into a body-cavity by providing a reflux duct line system for communicating between a suction duct line system and a feed air duct line system, and providing a pump for press-feeding gas sucked from a suction port side by the same quantity to a nozzle side. CONSTITUTION:A reflux pump 30 sucks gas, for instance, air press-fed into a body- cavity from a nozzle 7 of an endoscope 1, from a suction port 8, passes successively through a suction line 13 and a reflux line 14 and is guided to a reflux container 18. The reflux container 18 is in a closed state except an opening part 14a for communicating with the suction port 8 and an opening part 14b to the reflux pump 30. Therefore, air of the same quantity as the quantity of air which flows into the reflux container 18 is sucked to the reflux pump 30. The sucked air is press-fed to the reflux line 14 and a feed air line 10 by the reflux pump 30 and injected to an observation window 6 from the nozzle 7, and reaches the inside of the body-cavity again. Even in the case other foreign matter than air such as mucus, blood, etc., is sucked from the suction port 8, these foreign matter is stored in the reflux container 18, and no foreign matter is mixed into the reflux pump 30 and only air can be press-fed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an endoscope apparatus that is provided within an endoscope and includes a pump that pumps and suctions the same amount of gas.

[Prior Art] Conventionally, the tip of an endoscope is provided with a nozzle for cleaning the observation window, and gas or liquid is ejected from the nozzle connected to an air and water supply pipe system. The observation windows are being cleaned.

However, when the above-mentioned nozzle is used, mucus, blood, etc. in the body cavity invade and become stuck inside the nozzle, causing the air supply to be delayed.
There was a problem in that it became difficult to supply air and water from the water pipeline system.

Therefore, by constantly pumping gas to the nozzle to prevent the intrusion of mucus, blood, etc.
We have developed two types of endoscope devices equipped with pumps that can smoothly supply water and at the same time suck the gas from the suction port and prevent excessive gas from being sent into the body cavity.

One method employs a system in which pumps equipped with separate driving sources are used to pump and suck the flowing gas in order to eliminate clogging of the air and water supply pipe systems, and is disclosed in Japanese Patent Application Laid-Open No. 61736.
It is disclosed in 34. The other type is a two-unit type in which separate pumps for pressure feeding and suction are operated by one driving means, and is disclosed in Japanese Patent Laid-Open No. 141310/1983.

By the way, when pumping or suctioning gas, in order to keep the pressure inside the body cavity constant, it is necessary to set the pumping amount and the suction amount to be the same to prevent excessive gas from being sent into the body cavity. be.

[Problems to be Solved by the Invention] However, in the method of performing pressure feeding and suction using separate pumps, it is difficult to maintain a balance between pressure feeding and suction, and if the amount of pumping is even slightly larger than the amount of suction, If used for a long time, there is a risk that too much gas will be pumped into the body cavity. On the other hand, in the case of two pumps, the balance between the amount of pumping and the amount of suction is guaranteed by the performance of the pump itself. For this reason, it is not possible to respond to changes in conditions other than the pump, such as a decrease in the amount of suction due to a decrease in the effective cross-sectional area of the suction conduit when a medical treatment instrument is inserted through the suction conduit system. That is,
Even if the amount of suction decreases, the amount of pumping continues to be constant at all times, and as a result, there is a risk that an excessive amount of gas will be sent into the body cavity.

The present invention has been made to solve the above-mentioned problems, and its purpose is to eliminate air and water supply failures caused by foreign matter adhering to the nozzle, and to prevent gas from entering body cavities. An object of the present invention is to provide an endoscope device equipped with a pump that can maintain constant pressure in a body cavity at all times by suctioning an amount corresponding to pressure feeding.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention includes a nozzle and a suction port provided at the distal end of an endoscope, and an air supply pipe system connected to the nozzle. In an endoscope apparatus in which a suction line system is connected to each of the suction ports, a reflux line system is provided that communicates between the suction line system and the air supply line system, and the reflux line system is connected to the suction line system. A pump was provided to pump the same amount of gas sucked from the suction port side to the nozzle side.

[Function] The pump operates constantly to pump gas into the nozzle, preventing foreign substances such as mucus and blood from entering the nozzle, and keeping the suction amount and pumping amount constant, thereby reducing the amount of gas inside the body cavity. This prevents overfilling of the gas.

[Example] Hereinafter, an example of the endoscope apparatus of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram schematically showing the entire endoscope device 20 of the present invention, and this endoscope device 20 includes an endoscope 1 and a control section 2 to which the endoscope 1 is connected. It is equipped with

First, the configuration of the endoscope apparatus 20 will be described with reference to FIGS. 1 and 2.

The endoscope 1 includes an insertion section 3, an operation section 4, and a cable 5, and the proximal end of the cable 5 is connected to the control section 2. Furthermore, an observation window 6, a nozzle 7, and a suction port 8 are provided on the distal end surface of the insertion section 3. A solid-state imaging device 9 is provided inside the observation window 6, which photoelectrically converts the image of the field of view observed through the observation window 6, and sends this electrical signal to a video processing circuit ( (not shown). Further, the nozzle 7 is opened toward the outer surface of the observation window 6 and is formed to be able to spray cleaning water and air onto the outer surface of the observation window 6. This nozzle 7 is connected to a controller 2 from the endoscope 1.
An air supply path 10 of an air supply pipe system that extends in communication within the endoscope apparatus 20 is connected to the endoscope apparatus 20. In the middle of this air supply path 10, there is a water supply channel 1 of a water supply pipe system disposed within the endoscope device 20.
1 is connected, and this water supply channel 11 also extends in communication from the endoscope 1 to the control section 2. Further, a suction path 13 of a suction pipe system that extends from the endoscope 1 to the control section 2 in the endoscope apparatus 20 is connected to the suction port 8 . Furthermore, within the endoscope device 20, there is a reflux path 1 of a reflux pipe system that extends to communicate the air supply path 10 and the suction path 13.
4 are arranged.

Next, the control section 2 includes an air supply pump 37, a suction pump 39, and a reflux pump 30. A water supply channel 11 branched from the air passage 10 and extended is a water supply tank 1
6 to the air supply pump 37, respectively. On the other hand, a suction path 13 extending from the endoscope 1 is connected to a suction pump 39 via a suction container 17.

Further, a reflux path 1 extending from the suction path 13 in the endoscope 1
4 is connected to the suction side of the reflux pump 30 via the reflux container 18 disposed in the control unit 2, and the reflux path 14 extending from the discharge side of the reflux pump 30 is connected to the endoscope 1. Air supply path inside] 0.

The reflux pump 30 has an inner peripheral surface 3 as shown in FIG.
It includes a case 31 whose upper part 1a is formed into a substantially circular shape, and a fluid conduit 32 made of an elastically deformable soft member disposed along the inner circumferential surface 3 and a of the case 31. A suction side 32a and a discharge side 32b of this fluid pipe line 32 are connected to the reflux path 14, respectively. Further, a rotating stay 34 having two rollers 33 at both ends is disposed inside the case 31.
rotates counterclockwise about axis 35 as shown by the arrow.

The length of the rotary stay 34 is such that when one roller 33 reaches a substantially circular area of the inner circumferential surface 31a of the case 31, the fluid conduit 32 is crushed against the inner circumferential surface 31a. As a result, by rotating the rotating stay 34,
The roller 33 moves while crushing the fluid conduit 32. As the roller 33 moves, the gas within the fluid conduit 32 is continuously moved from the suction side 32a toward the discharge side 32b.

In addition, as shown in FIG. 1, first to third valves S1 S2 are provided in the air supply path 10, the water supply path 11, and the suction path 13, respectively.
, S3 are provided, and when the reflux pump 30 is in operation, the supply of cleaning water, air, etc., water supply, and suction are regulated. Said first
Further, the second valves S1 and S2 have a switching function in which when one valve is open, the other valve is opened, and a closing function in which both valves are closed. The third valve S3 has only an opening/opening function. Moreover, the water supply channel 11 connected to the water supply tank 16
The connection opening 11a opens relatively to the bottom of the water tank 16 and is submerged in the wash water.

A pressurized air intake opening 11b that is communicatively connected to the air pump 37 is arranged in the upper space of the water tank 16. Then, the surface of the cleaning water is pressed by the air pressure from the pressurized air intake opening 11b, and the cleaning water flows into the connection opening 11.
Sent via a. Next, the connection opening 13a of the suction path 13 connected to the suction container 17 is separated from the suction opening 13b connected to the suction pump 39 and positioned at the bottom. Thereby, foreign substances such as mucus and blood sucked from the suction port 8 fall to the bottom of the suction container 17 and are stored, and are not sucked into the suction opening 13b.

Next, the operation of the reflux pump 30 of the endoscope apparatus 20 of this embodiment will be explained in detail.

When the endoscope 1 is used, the reflux pump 30 is operated at all times or during operation to supply gas, such as air, pumped into the body cavity from the nozzle 7 of the endoscope 1 to a suction port. 8 and guided to a reflux container 18 via a suction path 13 and a reflux path 14 sequentially. This reflux container 1
8 is in a sealed state except for an opening 14a that communicates with the suction port 8 and an opening 14b that connects to the reflux pump 30.

Therefore, the same amount of air as the amount of air that has flowed into the reflux container ] 8 is sucked into the reflux pump 30 . The sucked air is sequentially transferred to the reflux path 14 and the air supply path 1 by the reflux pump 30.
0, is injected through the nozzle 7 into the observation window 6, and reaches the body cavity again. Note that even if foreign substances other than air, such as mucus or blood, are sucked through the suction port 8, these foreign substances are stored in the reflux container 18, and the reflux pump 3o is not contaminated with foreign substances, and only air is absorbed. can be pumped.

Since air is constantly ejected from the nozzle 7, mucus, blood, etc. do not flow back into the nozzle 7. In addition, the reflux pump 3
Even if a liquid such as a foreign object gets mixed into the pump, it will not have any adverse effect on the function of the pump, and the pump can pump an amount that matches the suction amount. The function of the reflux pump 30 becomes effective when air is mainly injected from the air supply path 1° to the observation window 6 through the nozzle 7 and the observation window 6 is completely dried.

In this case, the first to third valves 51S2, S3
It is desirable to close the pump 37.3 and also stop the driving of the pump 37.3.

Note that this embodiment is not limited to a double-circuit system; for example, a cylinder type pump may be used instead of the reflux pump 30 and the reflux container 18. In this case, a reservoir for mucus, blood, etc. is provided in the pump, and the reflux path 1 is
It is necessary to prevent contamination into the 4.

[Effects of the Invention] According to the endoscope device of the present invention, since the endoscope device is provided with a reflux pump, suction and pressure feeding of gas in the body cavity is performed appropriately, and mucus and blood are removed from the nozzle. It is possible to prevent the backflow of foreign substances such as the like, and also to prevent air and water supply failures due to nozzle clogging. Further, even if the amount of suction changes due to insertion of the treatment tool into the suction path, the balance between the amount of suction and the amount of pumping can be adjusted, so that the pressure inside the body cavity can be maintained at a constant constant.

[Brief explanation of drawings]

FIG. 1 is a diagram schematically showing a connection state of the endoscope apparatus of the present invention, and FIG. 2 is a diagram schematically showing a reflux pump provided in the endoscope apparatus of FIG. 1. 1... Endoscope, 2... Control unit, 7... Nozzle, 8
... Suction eye, 14... Reflux path, 18... Reflux container, 30... Reflux pump.

Claims (1)

[Scope of Claims] An endoscope in which a nozzle and a suction port are provided at the distal end of the endoscope, and an air supply pipe system is connected to the nozzle, and a suction pipe system is connected to the suction port. In the mirror device, a reflux duct system is provided that communicates between the suction duct system and the air supply duct system, and the reflux duct system allows the gas sucked from the suction port side to flow into the nozzle side. An endoscope device characterized by having a pump for pumping the volume under pressure.