JPH0319361Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an endoscope that is also equipped with a channel for forming a nonflammable gas passage for supplying nonflammable gas.

(Prior art) As is well known, observation, inspection, judgment, etc. inside a living body cavity, etc.
Endoscopes, which are used not only for diagnosis but also for treatment, are equipped with various parts that are directly necessary for them, as well as various auxiliary parts that are necessary for the functions of these parts to be completed. One of them is a channel for forming a nonflammable gas passage used for supplying nonflammable gas.

By the way, this channel for forming a nonflammable gas passage is achieved by introducing a high-frequency treatment instrument through a forceps channel built into the endoscope body with an insertion section inserted into a body cavity, etc., and applying high-frequency waves to the affected area in the body cavity. When performing treatment with methane gas, flammable gas such as methane gas accumulated in the body cavity should be replaced with non-flammable gas and used only to prevent unexpected accidents, and the pumping pressure of this non-flammable gas should be Partly because it is relatively expensive,
In many cases, this was installed alone, and was a major factor in reducing the diameter of the insertion section.

(Problems to be solved by the invention) The invention does not stop at using this nonflammable gas only to replace combustible gas, but also focuses on the fact that the pumping pressure is relatively high. The nonflammable gas during the replacement operation can also be used to wipe away water droplets etc. adhering to the surface of the observation window lens installed and fixed at the tip of the insertion section of the endoscope body. At the same time, the present invention aims to provide an endoscope whose insertion portion can be made smaller in diameter.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the endoscope according to the present invention has an air/water supply switching valve arranged in the endoscope body and installed in the operation section. The base side is provided for connection to a water supply source through the tube, and the distal end is connected to a water supply nozzle that opens toward a lens for an observation window fixedly installed at the distal end of the endoscope body. The tip of the water supply channel is opened and communicated with the water supply channel part in the operation unit, the base side is provided for connection to a nonflammable gas supply source, and an on-off valve and a check valve are provided along the flow path direction of the nonflammable gas. The present invention is characterized in that a channel for forming a nonflammable gas flow path formed by arranging valves in this order is also provided inside.

(Function) In other words, the insertion section of the endoscope main body of this type of endoscope is inserted into the living body cavity, and air/water supply and suction operations are repeated as needed to remove the affected area within the body cavity. When performing treatments and treatments using high-frequency treatment instruments based on the results of observations, tests, and diagnoses, etc.,
Appropriate treatment must be taken while constantly observing the operation unit through the eyepiece, so the observation must be quick, short, and accurate.Also, in order to prevent unexpected accidents, the observation must be done quickly and accurately. It is necessary to replace the flammable gas that has accumulated inside with non-flammable gas.

The endoscope according to the present invention has the above-mentioned configuration, and is suitable for air and water supply when performing treatments and treatments using a high-frequency treatment instrument such as an electric scalpel using a so-called forceps channel. The water supply operation using the switching valve is stopped, and while performing a suction operation using a forceps channel, etc., the on-off valve installed in the channel for forming a nonflammable gas passage is operated. If the gas is ejected from the water nozzle, the water droplets and body fluids that would otherwise accumulate on the surface of the observation window lens installed and fixed at the tip of the insertion tube will be removed. Unlike when using air, the gas is quickly wiped away in an extremely short period of time, allowing accurate observation images to be obtained, and at the same time replacing the flammable gas that had accumulated within the body cavity. Furthermore, by making the communication opening of the channel for forming a nonflammable gas flow path to the water supply channel part inside the operation part, water droplets remaining in the water supply channel after water supply can be removed with nonflammable gas. , Water droplets remaining in the water channel during observation will not drip onto the observation window and interfere with observation.

(Example) Hereinafter, the embodiments of the present invention will be described with drawings, in which components that belong to the public knowledge and are not obvious are omitted as much as possible, and only the main configuration that is particularly new in the present invention is illustrated. This will be explained in detail.

In the figure, A denotes an operating section 1, which is also referred to as a manual operating section or a manual operating section main body.
An insertion section 2 consisting of a flexible tube section or a curved tube section, which may also be referred to as a flexible section, and a distal end section 3, which may also be referred to as a rigid tip section, and a connection connected to the operating section 1. The main body of the endoscope is made up of cables 4 and the like as the main parts, and B has a light source, pumps for air and water supply, suction, and various control members and devices built-in. , a control device section equipped with a connector for the cable 4, etc., a connector 51 for the nonflammable gas supply pipe 60, etc. C is a water tank, and D is a CO connected to the control device section B via a pressure regulating valve 61. It is _{a 2nd} class non-flammable gas cylinder.

Then, in the endoscope main body section A, 5
6 is an eyepiece with a built-in eyepiece provided on the rear end side of the operation unit 1, and 6 is a lens for forming the observation optical system fixedly installed on the tip 3 (a window for transmitting an image). 7 is an image guide made of an optical fiber bundle or the like installed between the objective lens optical system fixedly installed in the distal end part 3 and the eyepiece part 5 of the operating part 1; 10 is the control device section B
The connector part of the cable 4 connected to the water supply connector part of the cable 4 passes through the air/water supply switching valve 30 installed in the operation part 1 and is connected to the water supply nozzle 11 which is open and fixed to the tip part 3 and is connected internally. Similarly to the water supply channel 10, the water supply channel 20 is connected from the connector section of the cable 4 connected to the air supply connector section of the control device section B through the air/water supply switching valve 30 installed in the operation section 1. This is an air supply channel connected to and connected to an air supply nozzle 21 whose opening is fixed to the tip 3.

Further, 40 is a channel for forming a nonflammable gas passage, which is connected to the connector part of the cable 4 connected to the nonflammable gas supply connector part in the control device part B, similar to the water supply channel 10 and the air supply channel 20. A distal end 41 is connected to a water supply channel section between the air/water supply switching valve 30 and the water supply nozzle 11 via an on-off valve 42 and a check valve 45 installed in the operating section 1.

By the way, the air/water supply switching valve 30 is always biased by a spring 33 and includes a valve body 31 in which a leak hole 32 is opened, and the on-off valve 42 is always biased by a spring 43. Valve body 4 biased in the direction to cut off the communication state
4, the water supply nozzle 11 is equipped with a lens 6 for forming an observation optical system installed and fixed on the tip part 3,
Alternatively, the window may be opened toward the window for image transmission, etc., which are not only well-known and for public use when viewed individually, but also include the operation section 1, which is not shown in the drawings. A knob for operation, a forceps introduction port, etc. are provided, and inside the endoscope main body A, although not shown, there is a light guide made of an optical fiber bundle, etc., and a forceps introduction port connected to the endoscope body.
A forceps channel connected to a forceps introduction port provided at the distal end 3, a suction channel connected to the forceps channel, an operating wire, etc. are installed inside the endoscope in the same way as conventional endoscopes.

The endoscope of the present invention has the above-described configuration, and, like conventional endoscopes of this type, the insertion section 2 is inserted into a living body cavity, etc., and the endoscope is attached to the operation section 1. Operate the knob or the like to bend the curved tube in the desired direction, repeat the suction operation and air/water supply as necessary to observe, inspect, and diagnose the inside of the body cavity etc. through the eyepiece 5. Of course, it can be used for photographing, etc., but in particular, it can be used to insert a high-frequency treatment instrument into the forceps channel through the forceps introduction port provided in the operation section 1, and to treat and treat affected areas in the body cavity. When replacing flammable gas accumulated in the body cavity with non-flammable gas, which is often necessary for 44 against the bias of the spring 43 to connect the nonflammable gas cylinder D and the water channel 10 through the channel 40 for forming a nonflammable gas passage, the nonflammable gas is transferred to the lens for forming the observation optical system. The water is ejected from the water supply nozzle 11 which is opened toward the lens 6 and the window, and gas is replaced with the help of the continuous suction operation. Adhering water droplets, body fluids, etc. are wiped away extremely quickly, making it possible to accurately and clearly transmit an image to the eyepiece section 5.

Therefore, appropriate treatment using high-frequency treatment instruments,
Treatment, etc. can be performed quickly and safely, and the diameter of the insertion portion 2 can be reduced easily.

In the above embodiment, in order to simplify the explanation, the air channel 20 is separated from the water channel 10, and they are connected to the water nozzle 11 which is fixedly opened to the distal end 3 of the insertion section 2. The air supply channel 20 is connected to the air supply nozzle 21, but as with the conventional one, a check valve is provided in the air supply channel 20.
Similar to the channel 40 for forming a nonflammable gas passage shown in the figure, if the water supply channel 10 is made to have a connecting opening within the operating section 1, it becomes much easier to reduce the diameter of the insertion section 2 than in the illustrated embodiment.

(Effects of the device) As is clear from the above explanation, according to the present invention, when treating or treating an affected area in a body cavity with a high-frequency treatment instrument, flammable In addition to replacing the flammable gas with a non-flammable gas, the relatively high-pressure non-flammable gas ejected during this replacement process can be used to quickly remove cleaning water droplets, body fluids, etc. that have adhered to observation optical lenses, etc. As a result, accurate observation images can be obtained quickly, and it has become possible to provide an endoscope that can safely perform appropriate treatments and treatments using high-frequency treatment instruments in an extremely short period of time.

[Brief explanation of drawings]

The drawing is a schematic diagram for explaining the main part configuration of an embodiment of an endoscope according to the present invention. A: endoscope main body, 1; operation section, 2; insertion section,
3; Tip part, 4; Connection cable, 5; Eyepiece part,
6; lens, 7; image guide, 10; water channel, 11; water nozzle, 20; air channel, 21; air nozzle, 30; air/water switching valve, 31; valve body, 32; leak hole , 33; Spring, 40; Channel for forming a nonflammable gas passage, 41; Tip, 42; Open/close valve, 43; Spring, 44; Valve body, 45; Check valve, B: Control device section, 51; Nonflammable gas Connector for supply pipe 60, C: water tank, D: nonflammable gas cylinder, 60; nonflammable gas supply pipe, 61; pressure regulating valve.

Claims (1)

[Scope of utility model registration request] It is arranged inside the endoscope body, and the base side is used for connection to a water supply source via the air/water supply switching valve installed in the operation part, and the tip end is connected to the tip of the endoscope body. The tip of the water supply channel is connected to a water supply nozzle that opens toward a lens for an observation window fixedly installed in the operation part of the water supply channel, and the base side is connected to a nonflammable gas supply source. A channel for forming a nonflammable gas flow path is provided for connection and is also provided with an internal channel in which an on-off valve and a check valve are arranged in this order along the flow path direction of the nonflammable gas. endoscope.