JPH045132Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention supplies irrigation fluid to the inside of a body cavity to clean the inside of the body cavity, as in a hysteroscope or cholangioscope. This invention relates to an endoscope irrigation fluid supply device that is inflated to ensure a wide field of view.

[Conventional technology] Among endoscopes, hysteroscopes, cholangioscopes, etc.
In order to obtain a wide observation field inside the body cavity, a liquid such as physiological saline is perfused into the body cavity. In order to supply this irrigation fluid, a irrigation fluid supply tank consisting of a sealed container is used, one end of a fluid feeding tube is connected to this tank, and the other end of this fluid feeding tube is attached to the endoscope. A system in which irrigation fluid is connected to a fluid supply path for irrigation, a tank is placed at a high place, and the head pressure generated by the potential energy of this tank is used to supply irrigation fluid into the body cavity has been used in the past. There is.

[Problems to be Solved by the Invention] As described above, simply arranging the tank at a high location may not provide enough pressure to supply perfusion fluid into the body cavity. For this purpose, a double-ball type hand pump etc. is used in the tank,
It is also known that the tank is pressurized by operating this hand pump,
Especially since the tank is located at a high place,
It is difficult for the person who operates the endoscope to operate this hand pump at the same time, and the operability is poor. In addition, when a pump is connected to the tank in this way, irrigation fluid can only be supplied by the pressure supplied from the pump. There is also the problem that it is not possible to switch between methods that use

The present invention was developed in view of the above points, and its purpose is to have a simple configuration and to easily pressurize the irrigation fluid supply tank as needed, and to open it to the atmosphere. An object of the present invention is to provide a perfusion fluid supply device for an endoscope that can be switched between.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention includes an irrigation fluid supply tank consisting of a closed container arranged at a high place, one end connected to this tank, and the other end connected to the irrigation fluid supply tank. a liquid feeding tube which is removably connected to a treatment instrument insertion channel of an endoscope, an air pipe opening into the inside of the tank, an air pump to which the other end of the air pipe is connected, and a liquid feeding tube provided in the air pipe. and a state in which the tank and the air pump are connected to the air pump, and a state in which the tank and the air pump are opened to the atmosphere through separate ports so that the air pump operates under no load and communicates the tank with the atmosphere. The feature is that the structure includes a switching valve that switches between the two.

[Function] By configuring as described above, the tank can be pressurized by connecting the tank and the air pump using the switching valve, so that the internal air can be pumped from the tank via the liquid feeding tube. High-pressure irrigation fluid can be supplied into the body cavity from the fluid delivery path of the endoscope.
Can greatly expand body cavities.

In addition, if the necessary irrigation fluid supply pressure can be obtained only by the head pressure based on the potential energy of the tank, without necessarily pressurizing the tank, switch the switching valve to a state where the tank is opened to the atmosphere,
And the on-off valve is opened. This allows liquid to be supplied to the liquid delivery tube based on the head pressure, and the air pump also communicates with the atmosphere through a separate port from the tank, resulting in no-load operation, resulting in energy savings. It will be done.

In addition, by supplying irrigation fluid through the treatment instrument insertion channel, there is no need to provide a separate channel for irrigation, and it can be used in devices such as hysteroscopes that require a smaller diameter insertion section. In some cases, it is extremely advantageous from a structural point of view that there is no need to provide a separate channel for irrigation fluid.

[Example] Hereinafter, an example of the present invention will be described in detail based on the drawings.

First, FIG. 1 shows the overall configuration of an endoscope. In the figure, 1 indicates an endoscope, and the endoscope 1 is connected to an operating section main body 2, an insertion section 3 inserted into a body cavity that is connected to the operating section main body 1, and a light source device 4. It is roughly composed of the universal code 5. The operating section main body 2 of this endoscope 1 includes a treatment instrument introduction section 7 through which a treatment instrument 6 such as forceps is inserted.
A treatment instrument insertion channel 8 is formed between the treatment instrument introduction section 7 and the distal end of the insertion section 3 . The treatment instrument insertion channel 8 is opened as a treatment instrument outlet (not shown) at the distal end of the insertion section 3, so that the treatment instrument 6 inserted from the treatment instrument introduction section 7 can pass through the treatment instrument insertion channel 8. The treatment instrument can be led out through the channel 8 from the outlet.

Next, reference numeral 9 indicates a perfusion liquid supply tank that stores perfusion liquid.This tank 9 is made of a sealed container, and is designed to be hung at a high place with a hanger or the like. Therefore, head pressure is acting on the tank 9. One end of a liquid feeding tube 10 is connected to this tank 9, and the other end of this liquid feeding tube 10 can be connected to the treatment instrument introduction part 7 in the operating section main body 2. The perfusate in this tank 9 is sent into the body cavity from a liquid feeding tube 10 through a treatment instrument insertion channel 8. Also, in the middle of this liquid feeding tube 10, there is communication between the tank 9 and the treatment instrument insertion channel 8.
An on-off valve 11 for shutting off is installed.

Here, the light source device 4 is equipped with a cleaning fluid for cleaning body fluids or other foreign matter that adheres to the observation window, illumination window, etc. normally provided at the tip of the insertion section 3 of the endoscope 1. An air pump 12 is built in to force-feed the air toward the observation window and the illumination window, and a pressurized air supply path 13 from the air pump 12 is led to the connection part of the light source connector 5a in the light source device 4. In cases where the inside of the body cavity is perfused during observation and treatment, such as with a hysteroscope or cholangioscope, there is no need to clean the observation window or illumination window. The light source connector portion 5a of the universal cord 5 in the endoscope 1 is normally not provided with a connection portion to the pressurized air supply path 13 described above. However, in the present invention, the air pump 12 built in the light source device 4 is used to pump the irrigation fluid supply tank 8.
We are trying to pressurize the area.

The tank 9 is provided with an air pipe 14 whose one end opens above the liquid level in the tank 9 and whose other end extends outside the tank 9. An air pipe 15 is connected to. The other end of the air pipe 15 extends to the light source connector section 5a, and the pressurized air supply path 1
It is now connected to 3. Furthermore, a switching valve 16 is interposed in the middle of the air pipe 15 for switching between the state in which the tank 9 is connected to the air pump 12 and the state in which it is opened to the atmosphere.

As shown in FIG. 2, the switching valve 16 includes a valve body 18 in a valve casing 17, a tank side port 19 communicating with the tank 9, a pump side port 20 communicating with the air pump 12, and a valve body 18 connected to the atmosphere. It consists of a four-way valve with communicating atmospheric side ports 21 and 22, and the valve body 18 has a tank side port 19.
A switching flow path 23 is provided for switching between the pump side port 20 and the atmosphere side port 21, and a state in which the atmosphere side ports 21 and 22 are communicated, and the pump side port 20 is switched between the atmosphere side port 20 and the atmosphere side port 21 is provided.
A switching flow path 24 is provided for switching to a state in which the 2 and 2 are communicated with each other. The above-mentioned flow path switching is performed by manually operating the operator 25.

Moreover, this switching valve 16 also has a function of adjusting the pressure inside the tank 9 by controlling the flow rate of pressurized air supplied from the air pump 12 toward the tank 9. That is, by rotating the valve body 18 by a predetermined amount from the state where the tank side port 19 is completely connected to the pump side port 20, as shown in FIG. By narrowing the passage to the port 20, the supply pressure to the tank 9 can be adjusted.

This embodiment is constructed as described above, and its operation will be explained next.

First, the liquid feeding tube 10 is connected to the treatment instrument introducing section 7, the light source connector 5a of the universal cord 5 is connected to the light source device 4, and the insertion section 3 is inserted into the body cavity. In this state, the on-off valve 1
At the same time, the tank side port 19 and the pump side port 20 of the switching valve 16 are made to communicate with the atmosphere side ports 21 and 22, respectively.
and the air pump 12 are both kept open to the atmosphere. As a result, the air pump 12 is opened to the atmosphere, and even if the air pump 12 is operated, it operates under no load.

When the insertion section 3 is guided to a predetermined observation target region, the on-off valve 11 is opened, and the irrigation fluid is supplied from the tank 9 through the treatment instrument insertion channel 8 from the liquid supply tube 10 into the body cavity. Here, the tank 9 is arranged at a high place, and the tank 9 is connected to a switching valve 16 via an air pipe 14 and an air pipe 15.
Since the tank 9 is in communication with the atmosphere, the head pressure in the tank 9 makes it possible to supply irrigation fluid from the liquid feeding tube 10 through the treatment instrument insertion channel 8.

Next, depending on the constitution of the patient, the type and nature of the test, etc., it may be necessary to supply the perfusate at high pressure. In this case, by rotating the operator 25 of the switching valve 16 and rotating the valve body 18, the tank side port 19 is switched to communicate with the pump side port 20. As a result, pressurized air from the air pump 12 is transferred to the air pipe 15.
and is supplied into the tank 9 via the air pipe 14 to pressurize the tank 9. As a result, the supply pressure of the perfusion fluid increases, making it possible to greatly expand the body cavity.

Furthermore, when the changeover valve 18 is switched from pressurizing the tank 9 to opening to the atmosphere, the pump side port 20 immediately communicates with the atmosphere side port 22, so the air pump 12 quickly returns to its no-load operating condition. And tank side port 1
9 is opened to the atmosphere via a separate atmospheric port 21, and the residual pressure within the tank 9 is immediately released to the atmosphere. Therefore, only head pressure due to potential energy acts on this tank 9.

In short, by operating the two valves, the switching valve 16 and the on-off valve 11, the high-pressure irrigation fluid supply state by pressurizing the tank 9 with the pressure from the air pump 12 and the potential energy of the tank 9 are utilized. low-pressure perfusate supply state due to the effect of the head pressure,
It is possible to switch between three states including the perfusion liquid supply stop state in which the supply of perfusion liquid is stopped, and the controllability of the supply of perfusion liquid becomes extremely good.

This switching valve 18 is designed to be able to adjust the flow rate of pressurized air supplied from the air pump 12 to the tank 9.
By adjusting the supply flow rate of pressurized air according to step 8, it becomes possible to supply the irrigation fluid at a desired pressure. Therefore, it is possible to obtain a sufficiently wide observation field of view inside the body cavity, and observation and examination can be carried out smoothly.

Moreover, in this endoscope 1, when performing treatment, cell collection, etc. using the treatment instrument 6 such as forceps, the treatment instrument 6 may be inserted into the treatment instrument insertion channel 8. However, at this time, the perfusion flow path within the treatment instrument insertion channel 8 becomes narrow;
Since the tank 9 can be pressurized, the flow rate of perfusion fluid supplied into the body cavity will not be insufficient. In this way, when the treatment instrument insertion channel 8 is shared with the irrigation channel, there is no need to provide a separate irrigation channel in the insertion section 3, and the diameter of the insertion section 3 can be reduced.

In particular, when supplying irrigation fluid using the treatment instrument insertion channel 8, the cross-sectional area of the irrigation fluid flow path is different between the state in which the treatment instrument 6 is inserted and the state in which it is not inserted. The supply flow rate of irrigation fluid may change. However, the treatment tool 6
When the perfusion channel is narrowed by inserting the
High-pressure irrigation fluid is supplied by pressurizing the inside of the tank, and when the treatment instrument 6 is not inserted and a wide irrigation channel is secured, low-pressure irrigation fluid is supplied by the action of the head pressure using the potential energy of the tank 9. By setting it in the supply state, it becomes possible to make the supply of perfusion fluid constant both when the treatment tool 6 is used and when it is not used.

[Effects of the invention] As detailed above, the present invention provides an on-off valve to a liquid feeding tube whose one end is connected to the irrigation fluid supply tank and whose other end is removably connected to the treatment instrument insertion channel of the endoscope. In addition, an air pipe is connected to pressurize the inside of this tank, and the other end of this air pipe is removably connected to an air pump built into the light source device. and a state in which the tank and air pump are opened to the atmosphere through separate ports so that the air pump operates without load and the tank and the atmosphere are communicated. Therefore, it is possible to easily switch between a high-pressure irrigation fluid supply state in which the inside of the tank is pressurized by the pressure from the air pump, and a low-pressure irrigation fluid supply state in which the head pressure is applied using the potential energy of the tank. This allows for extremely good control over the supply of irrigation fluid, and since the fluid delivery tube is connected to the treatment instrument insertion channel, the diameter of the endoscope insertion section can be reduced, and When supplying irrigation fluid through this treatment instrument insertion channel, when no treatment instrument is inserted through this treatment instrument insertion channel, a sufficient flow path is secured, so irrigation fluid can be supplied in a low pressure irrigation supply state. , When the flow path becomes narrow due to the insertion of a treatment instrument, the high-pressure irrigation fluid supply state makes it possible to always supply irrigation fluid in a constant state so that irrigation fluid does not run out. play.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is an explanatory diagram showing the overall configuration of an endoscope equipped with an irrigation fluid supply device, Fig. 2 is an explanatory diagram of the configuration of a switching valve, and Fig. 3 is an explanatory diagram showing the overall configuration of an endoscope equipped with an irrigation fluid supply device.
The figure is an explanatory diagram of the operation of FIG. 2. DESCRIPTION OF SYMBOLS 1...Endoscope, 2...Operation unit main body, 3...Insertion section, 4...Light source device, 5...Universal cord, 7...Treatment instrument introduction part, 8...Treatment instrument insertion channel, 9... ... Irrigation liquid supply tank, 10 ... Liquid feeding tube, 12 ... Air pump, 14 ... Air pipe, 15 ... Air piping, 16 ... Switching valve.

Claims (1)

[Scope of utility model registration request] an irrigation fluid supply tank consisting of a sealed container arranged at a high location; a fluid feeding tube having one end connected to this tank and the other end removably connected to a treatment instrument insertion channel of an endoscope; and the tank. an air pipe opening into the interior of the air pipe; an air pump to which the other end of the air pipe is connected; a state provided in the air pipe to connect the tank to the air pump; and a separate port for connecting the tank and the air pump. An irrigating fluid supply for an endoscope, characterized in that the switching valve is configured to switch between a state in which the air pump is opened to the atmosphere through the tank, the air pump operates under no load, and the tank communicates with the atmosphere. Device.