JPH0649282Y2 - Endoscope treatment device raising device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a side-view endoscope for raising a treatment tool such as forceps that is inserted into an insertion portion of the endoscope. The present invention relates to a treatment tool raising device for an endoscope.

[Prior Art] Endoscopes include a direct-viewing type in which the illumination window and the observation window are provided on the distal end surface of the insertion portion, and a side-viewing type in which the illumination window and the observation window are formed on the side portions. There is. In addition, in the side-view endoscope, an opening for leading out a treatment tool such as forceps is formed in the side part as well as an illumination window, an observation window, and the like.

However, even in a side-view endoscope, the treatment instrument insertion channel is arranged in the axial direction of the insertion portion, and therefore, the treatment instrument inserted in the treatment instrument insertion channel is led out from the opening. In order to smoothly and surely carry out the operation of directing to a portion to be treated, a treatment instrument raising base is provided at the distal end portion of the insertion portion. Then, in order to direct the treatment instrument guided from the treatment instrument raising base and led out from the opening in a desired direction, the treatment instrument raising base can be lowered and raised.

Then, in order to perform the elevation operation by remote control of the treatment instrument raising base, one end of the raising operation wire is connected to the treatment instrument raising base, and the other end of this raising operation wire is connected to the treatment instrument raising base. It extends from the insertion section to the main body operation section and is connected to an operation lever attached to the main body operation section. Therefore,
When this operating lever is operated, the raising operation wire is pushed and pulled, and the treatment instrument raising base is raised and lowered.

Here, in order to prevent body fluid or washing water from infiltrating into the insertion portion during washing, the raising operation is performed on the flexible tube from the portion through which the raising operation wire for operating the treatment instrument raising base is inserted. A wire is inserted through the flexible tube, and the flexible tube is connected to the distal end of the insertion portion.
During cleaning of the endoscope, the inside of the flexible tube must be completely cleaned, and therefore clean water can be supplied into the flexible tube. .

[Problems to be solved by the invention] By the way, after cleaning the inside of the flexible tube through which the raising operation wire is inserted, air is blown in to remove the cleaning water. It may not be possible to remove it completely. If the raising operation wire is pushed and pulled while water droplets remain in the flexible tube as described above, the sliding resistance increases and a large force is required to operate the operation lever. There is a problem that the operability of the wire deteriorates.

Therefore, as a result of various studies on the cause of the increase in the resistance of the upright operation wire described above, the inventors of the present invention have noticed that the material forming the upright operation wire has a problem. That is, the raising operation wire in the prior art is formed by coating the surface of a wire made of a super elastic metal wire with a hydrophobic fluororesin or the like in order to improve sliding. Here, when the inside of the flexible tube is in a dry state, it is possible to smoothly slide the raising operation wire coated as described above, but if water droplets or the like intervene in the flexible tube. The water droplets serve as a binder to increase the resistance to the movement of the raising operation wire.

The present invention has been made in view of the above points, and an object thereof is to provide a treatment instrument raising device for an endoscope, which enables easy operation of the treatment instrument raising base with a light force. To provide.

[Means for Solving the Problems] In order to achieve the above-described object, the present invention provides a raising operation wire for remotely operating a treatment instrument raising base formed of a hydrophilic member or a hydrophilic member. It is characterized by being formed by coating with a flexible member.

[Operation] With the configuration described above, even if the cleaning water remains in the flexible tube, the affinity between the surface of the raising operation wire and the water is good, and the cleaning water intervenes. It is possible to avoid an increase in resistance due to. In particular, if the flexible tube is filled with water, this water will cause a lubricating action during sliding between the raising operation wire and the flexible tube, and the raising operation wire will be further smoothed. Can be slid on. In addition, by filling the flexible tube with water in this way, it becomes possible to prevent the inflow of body fluids and the like into the flexible tube, so that cleaning after use can be performed quickly and reliably. You will be able to do it.

[Embodiment] An embodiment of the present invention will be described below in detail with reference to the drawings.

First, FIG. 1 shows the overall configuration of the endoscope. In the figure, reference numeral 1 denotes a main body operation portion, 2 denotes an insertion portion into a human body, etc., and most of the insertion portion 2 is freely bent along an insertion path from a continuous portion to the main body operation portion 1. The flexible portion 2a is formed so that the angle portion 2b is connected to the tip of the flexible portion 2a, and the tip hard portion 2c is sequentially connected to the angle portion 2b.

This endoscope is of a so-called side-view type in which an illumination window and an observation window (not shown) are provided on the side surface, and a treatment tool T such as forceps used in this endoscope has a main body operation unit 1. It is designed to be inserted from the treatment instrument insertion portion 3 provided on the. As shown in FIG. 2, a treatment instrument insertion channel 10 is provided in the axial direction of the insertion portion 2, and the treatment instrument T has a cavity formed in the distal end hard portion 2c via the treatment instrument insertion channel 10. Department
It is supposed to be derived within 11. The cavity 11 is open at the side of the distal end hard portion 2c, and the treatment tool T can be led out to the outside through the opening 12.

The treatment instrument T includes a treatment instrument insertion channel 10 provided in the insertion portion 2.
The inside is introduced into the cavity portion 11 so as to be guided in the axial direction of the insertion portion 2, and the direction thereof is changed in the cavity portion 11 so that it is led out from the opening 12. Become. Then, in order to surely change the direction of the treatment tool T in the hollow portion 11 so that the treatment tool T can be directed to the affected area or the like that needs to be treated, the treatment tool raising base 13 is provided in the hollow portion 11. Is installed. This treatment tool raising stand 13
Is capable of raising and lowering about the axis 13a, and when the treatment instrument raising base 13 is moved downward, the raising angle of the treatment instrument T decreases as shown by the solid line in FIG. When it is raised, it can be raised from the opening 12 at a substantially right angle or at a large angle as shown by the phantom line in FIG. Therefore, the treatment instrument raising base 13
The rising angle of the treatment tool T is controlled by controlling the elevation angle of the treatment tool T, so that the treatment tool T can be oriented in a desired direction.

Therefore, in order to remotely raise and lower the treatment instrument raising base 13, one end of a raising operation wire 14 is attached to the treatment instrument raising base 13, and the wire 14 is inserted from the insertion portion 2. The other end is extended to the inside of the main body operation portion 1 and is connected to the slide rod 15 as shown in FIG. The slide bar 15 has a pair of holding plates 16,1.
6 is attached so that the pin 18 protruding from the operation lever 17 is engaged between the holding plates 16 and 16. Therefore,
By rotating the operation lever 17 in the direction shown by the arrow in the figure, the wire 14 can be pushed and pulled to raise and lower the treatment instrument raising base 13.
The mechanism for pushing and pulling the wire 14 by the operating lever 17 and its operation are described in, for example, J.
Since it is well known from the publication, etc., its detailed description is omitted.

Further, a flexible tube 19 is provided in order to guide the wire 14 described above in the insertion portion 2, and the wire 14 is inserted through the flexible tube 19. One end of the flexible tube 19 is connected to the connecting pipe 20 inserted through the wall portion of the rigid tip end portion 2c, and the other end is connected to the main body operating portion 1
It is connected to the connecting pipe 21 provided in the. A water supply pipe 22 is connected to the connecting pipe 21, and the water supply pipe 22 is connected to a water supply port 23 provided in the main body operation unit 1. Therefore, attach the water supply tube 24 to this water supply port 23,
By supplying cleaning water from the water supply tube 24, the inside of the flexible tube 19 can be cleaned. Then, at the time of this cleaning, in order to prevent the cleaning water from flowing from the connecting pipe 21 into the main body operating portion 1, a seal member 25 is provided between the end of the connecting pipe 21 and the slide rod 15.
Is being installed.

Thus, as described above, in order to perform the raising operation of the treatment instrument raising base 13, the wire 14 is pushed and pulled by operating the operating lever 17 with a finger or the like. In doing so, the wire 14 slides on the inner surface of the flexible tube 19. Then, with the water droplets remaining in the flexible tube 19, the sliding resistance between the flexible tube 19 and the wire 14 can be reduced, and the operation lever 17 can be operated with a light operation force. To enable this, the wire 14 is made by coating the surface of a superelastic metal with a hydrophilic member.

As the coating material, for example, a mixture of maleic anhydride and methyl ethyl half ester in urethane resin is preferably used. Then, the wire 14 is subjected to an appropriate primary treatment in advance, the above-mentioned coating material is applied, and the hydrophilic coating layer thus formed is neutralized with an acid to form a hydrophilic coating.

Thus, by inserting the wire 14 having the hydrophilic coating layer formed on the surface thereof into the flexible tube 19, even if water droplets adhere to the flexible tube 19, the wire drops The operation resistance to 14 does not increase. Further, when the wire 14 is operated, water is supplied into the flexible tube 19 from the water supply port 23 through the connecting pipe 21, so that the flexible tube 19 is filled with water. Therefore, the sliding of the wire 14 in the flexible tube 19 becomes extremely good. Therefore, the operating lever 17 can be operated with a light operating force, and the treatment instrument raising base can be operated.
It is extremely easy and smooth to perform the 13 raising operations,
The operability of the operating lever 17 is improved. Further, if the flexible tube 19 is kept filled with water in this way, there is no possibility that body fluid or the like will enter the flexible tube 19, which is convenient from the viewpoint of hygiene.

In the above-described embodiment, the body portion of the wire 14 is formed of a superelastic metal wire, and a hydrophilic coating is formed on the metal wire.
The wire itself constituting 14 may be formed of a resin material having hydrophilicity.

[Effects of the Invention] As described above, according to the present invention, the raising operation wire is formed by a hydrophilic member or by coating a hydrophilic member. Even if water droplets after cleaning remain in the flexible tube that is inserted, there is no risk that the water droplets will increase resistance during sliding of the operation wire in the flexible tube. Pushing and pulling operations can be performed smoothly with a light operating force. In addition, if the flexible tube is filled with water, the raising operation wire can be pushed and pulled with a lighter operating force, and the flexible tube must be protected so that body fluids etc. do not enter. Therefore, bacteria and the like do not adhere to the inner surface of the flexible tube, and various effects such as easy cleaning of the flexible tube are achieved.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is an overall configuration diagram of an endoscope, FIG. 2 is a sectional view of a distal end portion, and FIG. 3 is a partial sectional view of a main body operating portion. 1: Main body operation part, 2: Insert part, 2a: Flexible part, 2b: Angle part,
2c: distal end hard part, 10: treatment instrument insertion channel, 11: cavity part, 12: opening, 13: treatment instrument raising base, 14: wire, 17: operating lever, 19: flexible tube, T: treatment instrument.

Claims (1)

[Scope of utility model registration request] 1. A treatment instrument raising base for raising a treatment instrument such as forceps is attached to a distal end portion of an insertion portion of an endoscope, and a treatment instrument insertion hole provided in the axial direction of the insertion portion is attached to a side thereof. An opening for forming a treatment tool to be inserted into the channel to the outside is formed, and a push-pull operation is performed by a raising operation wire inserted through a flexible tube in the treatment tool raising base. A treatment instrument raising device for an endoscope, characterized in that the operation wire is formed of a hydrophilic member or is formed by coating with a hydrophilic member.