JP3411658B2 - Endoscope - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope having both functions of gas supply and water supply. 2. Description of the Related Art In recent years, transendoscopic surgery for inserting a high-frequency treatment instrument into a treatment instrument insertion channel to treat a lesion in a body cavity with a high-frequency current has been widely performed. . When a high-frequency treatment is performed in a body cavity in this manner, an explosion may occur if there is a flammable gas in the body cavity. Therefore, an incombustible gas such as carbon dioxide gas is sent into the body cavity. There is a need. In addition, it is necessary to supply water in order to clearly observe the lesion. Conventionally, therefore, a pipe switching valve is provided in the operation section so that the non-combustible gas can be fed into an air supply tube provided separately from the treatment instrument insertion channel in the insertion section of the endoscope. By performing a pneumatic operation, gas can be supplied toward the distal end of the insertion portion via an air supply tube (Japanese Utility Model Publication No. 63-44008, Japanese Patent Application Laid-Open No. 57-1)
03621). [0005] In order to use a treatment instrument having a high treatment capability, the treatment instrument insertion channel inserted into the insertion portion needs to be as thick as possible. However, increasing the diameter of the insertion portion of the endoscope has a great limitation in terms of insertability, except when performing treatment in a large digestive tract such as treatment in the large intestine. On the other hand, gas supply and water supply need to be performed effectively as described above. As a result, conventionally, if a thick channel is used in order to enhance the treatment ability, the insertion portion becomes thicker and the insertability deteriorates. Conversely, if the insertability is improved, the channel is made thinner to increase the treatment ability. If both had to be reduced and somehow tried to satisfy both, effective gas supply and water supply could not be achieved. Accordingly, an object of the present invention is to provide an endoscope which allows a treatment instrument insertion channel as thick as possible to be inserted into an insertion portion which is as thin as possible, and which can effectively perform gas supply and water supply into a body cavity. And [0008] To achieve the above object, an endoscope according to the present invention comprises a treatment tool insertion channel inserted into an insertion portion of the endoscope for allowing treatment tools to pass therethrough. When,
Gas supply operation means provided in the operation section so as to feed nonflammable gas into the treatment instrument insertion channel at an operation section connected to the proximal end side of the insertion section; In addition to the gas supply operation unit, the operation unit is provided with a water supply operation unit provided separately from the gas supply operation unit so as to supply water into the treatment instrument insertion channel in the operation unit independently of the gas operation. An embodiment will be described with reference to the drawings. In FIG. 2, reference numeral 10 denotes an insertion portion of an endoscope, which connects a bending portion 12 that is bent by remote control to a distal end side of a flexible tube 11,
Further, the distal end body 13 is connected to the tip side. As shown in FIG. 3, an observation window 14, an illumination window 15, and an outlet 16a of a treatment instrument insertion channel are formed on an end surface of the distal end body 13. Returning to FIG.
The proximal end side of the insertion section 10 is connected to the operation section 20. Then, a treatment instrument insertion port 16b which is an entrance of the treatment instrument insertion channel 16 inserted through the entire length of the insertion section 10
Is protruded obliquely upward near the lower end of the operation unit 20, and a forceps plug 21 is detachably attached thereto. The treatment tool insertion channel 16 is for allowing treatment tools to pass therethrough. In this embodiment, no other channels and tubes are inserted into the insertion portion 10, and air supply is performed. , Water supply, gas supply, and suction are all performed using the treatment instrument insertion channel 16 as a conduit. 22 selectively sends air and water into the treatment instrument insertion channel 16 in the operation section 20;
An air / water supply operation valve for performing an operation of supplying / supplying water to / from the outlet 16a at the distal end, and is provided at an upper portion of the operation unit 20 so as to project forward. Reference numeral 23 denotes a gas feed operation valve for feeding an incombustible gas such as carbon dioxide gas into the treatment instrument insertion channel 16 in the operation section 20 and sending the gas to the outlet 16a at the distal end. In addition, separately from the air / water supply operation valve 22, it is protruded rearward near the upper end of the operation unit 20. However, other arrangements such as protruding from the side surface of the operation unit 20 may be adopted. Reference numeral 24 denotes a suction operation valve for performing an operation of performing suction from the outlet 16 a at the distal end through the treatment instrument insertion channel 16, and is disposed above and adjacent to the air / water supply operation valve 22. Reference numeral 25 denotes an eyepiece. A connector 52 that is connected to a light source device (not shown) is attached to a distal end of a flexible connection pipe 51 whose base end is connected to the operation unit 20. On the side wall of the connector 52, an air supply pump (not shown) and an air supply water supply base 53 having a double cylinder structure for receiving air and water from a water supply tank, and a non-combustible gas such as a carbon dioxide gas cylinder are provided. Gas supply base 5 receiving supply of water
4 and a suction base 55 connected to the suction device are provided in a protruding manner. Reference numeral 56 denotes a ventilation cap for opening and closing between the inside of the connector 52 and the outside air. FIG. 4 shows the operation section 20, and each of the operation valves 22, 23, and 24 has a cylinder 221 or 231 formed with a groove or hole and urged forward by a piston 222, 232 or 242. , 241, and slidably disposed therein to operate the operation buttons 223, 233, 243 attached to the tips of the pistons 222, 232, 242. Since such a valve structure is known, a detailed description will be omitted. In addition, each piston 222, 23
An O-ring for sealing is appropriately mounted on the sliding surface between the cylinders 2,242 and the cylinders 221,231,241.
Its illustration is omitted. The air supply pipe 31 and the water supply pipe 32 connected to the air supply / water supply base 53 of the connector 52 are connected to the cylinder 221 of the air / water supply operation valve 22, and the gas supply pipe 33 connected to the gas supply base 54 is connected to the gas supply pipe 33. , Cylinder 231 of gas supply operation valve 23
And the suction tube 34 connected to the suction base 55 is
The suction operation valve 24 is connected to a cylinder 241. The end of the cylinder 241 of the suction operation valve 24 and the treatment instrument insertion channel 16 are connected in the operation section 20 by a thick communication pipe 36. The relay pipe 37 inserted in the middle of the communication pipe 36 and the cylinder 221 of the air / water supply operation valve 22 and the cylinder 231 of the gas supply operation valve 23 are connected by a water supply pipe 38 and a gas supply pipe 39. Have been. Therefore, water supply and gas supply from both operation valves 22 and 23 are performed in the communication pipe 36 via the relay cylinder 37 in the operation unit 20. The cylinder 22 of the air / water supply operation valve 22
1 is connected to the cylinder 231 of the gas supply operation valve 23, and the air supply from the gas supply / water supply operation valve 22 once passes through the cylinder 231 of the gas supply operation valve 23, This is performed on the same route as the gas transmission via the gas pipe 39. FIG. 4 shows a standby state, in which no air is supplied, no water is supplied, no gas is supplied, or no suction is performed from the operation valves 22, 23, 24 to the communication pipe 36. In this state, the air supplied from the air supply pipe 31 to the cylinder 221 of the air / water supply operation valve 22 is discharged into the atmosphere from the leak hole 224 opened to the operation button 223, and the water supply pipe 32, the gas supply pipe 33
And the suction pipe 34 are both pistons 222, 232, 2
Blocked at 42. When the suction operation button 243 is pressed in this state, the movement of the piston 242 causes the suction pipe 34 and the communication pipe 3 to move.
4 and suction is performed from the distal end of the insertion portion through the treatment tool insertion channel 16 as shown by a broken line in FIG. As shown in FIG. 5, if the leak hole 224 of the air / water supply operation button 223 is closed with a fingertip, the air supply pipe 3
The air sent into cylinder 221 from
0, and from the cylinder 231 of the gas feed operation valve 23 via the gas feed pipe 39, and from the relay cylinder 37 to the communication pipe 3
6, and the air reaches the treatment instrument insertion channel 16 from the outlet 16a at the distal end of the insertion portion. As shown in FIG. 1, when the air / water supply operation button 223 is pushed, the air supply pipe 31 is closed by the movement of the piston 222, and the water supply pipe 32 communicates with the water supply pipe 38, and Is sent from the relay tube 37 into the communication pipe 36, is supplied to the distal end of the insertion portion via the treatment tool insertion channel 16, and water is ejected from the outlet 16a at the distal end. Thereby, cleaning of the surface of the observed portion can be performed. As shown in FIG. 1, when the gas supply operation button 233 is pressed, the gas supply pipe 33 and the gas supply pipe 39 communicate with each other, and carbon dioxide gas is sent from the relay cylinder 37 into the communication pipe 36. Then, gas is sent to the distal end of the insertion portion via the treatment instrument insertion channel 16, and carbon dioxide gas is ejected from the outlet 16a at the distal end. As a result, carbon dioxide gas is sent into the body cavity, and even if high-frequency treatment is performed, there is no danger of explosion or the like. As shown in FIG. 1, the water supply operation and the gas supply operation can be operated completely independently of each other.
Therefore, by performing both water supply and gas supply operations simultaneously, it is possible to perform mixed injection of water and carbon dioxide gas through the same treatment tool insertion channel 16, thereby cleaning the surface to be observed and the body cavity. The non-combustible gas filling into the inside can be performed arbitrarily and easily simultaneously. In addition, by mixing and injecting, it is possible to obtain a better cleaning action than when only water is injected. Further, since the water supply operation and the gas supply operation can be performed completely independently of each other, both operation buttons 22
By appropriately adjusting the pushing amount of 3,233, the mixing ratio of water and carbon dioxide gas can be arbitrarily changed, and the necessary amount of water and gas can always be supplied. Note that the present invention is not limited to the above embodiment, and for example, the functions of air supply and suction may not be necessarily provided. According to the present invention, the gas supply and the water supply to the distal end of the insertion portion can be performed only by inserting one treatment instrument insertion channel into the insertion portion and passing through the treatment instrument insertion channel. Therefore, the outer diameter of the insertion portion can be formed as thin as possible, and the treatment instrument insertion channel can be formed as thick as possible. By the gas supply operation button and the water supply operation button provided independently of each other, the gas supply and the water supply can be independently mixed and injected in an arbitrary mixing state.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side sectional view of a water supply and gas supply state of an embodiment. FIG. 2 is an overall side view of the endoscope of the embodiment. FIG. 3 is a perspective view of a distal end of an insertion portion of the endoscope according to the embodiment. FIG. 4 is a side sectional view of the embodiment in a standby state. FIG. 5 is a side sectional view of the air supply state of the embodiment. [Description of Signs] 10 Insertion section 16 Treatment tool insertion channel 20 Operation section 22 Air supply / water supply operation valve 23 Gas supply operation valve

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A61B 1/00-1/32

Claims (1)

(57) Claims 1. A treatment tool insertion channel inserted into an insertion portion of an endoscope for passing treatment tools, and an operation connected to a proximal end side of the insertion portion. Gas transmission in the department
Feeding the feed gas operating means arranged on the operation unit to perform an operation for feeding the noncombustible gas to the tube, independently of the gas operation feed by the feed gas operating means water into the water pipe in the operating unit as such, the feed provided separately and water supply operation means arranged in the operation unit and the gas operating means and the feed gas tube and the water supply to a thick communication pipe than those
And connect the communicating pipe to the treatment instrument insertion channel.
An endoscope characterized by being connected in communication .