JPH02167130A - Suction operation apparatus of endoscope - Google Patents

Abstract

PURPOSE:To simplify a structure and to enhance operability by forming a notch to a tube and changing over a suction state and a stand-by state only by operation for pressing said notch part laterally. CONSTITUTION:A notch 6 is formed to a tube 2 obliquely and linearily in the direction from the part communicating with a suction means 3 to the part communicating with a suction part 5. In a stand-by state, a press plate 7 always presses the tube 2. Therefore, even when the suction means 3 is operated, no suction is performed from the suction port 5 because the cut opening on the side communicating with the suction port 5 of the leading end of an insert part is closed and the open air is sucked in the tube 2 from the opening of the notch 6. Next, when an operation button 8 is pushed in, the press state is released and the notch 6 of the tube 2 is closed from the open air and suction is performed from the suction port 5 of the leading end of the insert part 4. At this time, the flap 6a of the notch 6 gets into the cut opening on the opposite side and stopped in the pressure contact state with the inside surface of the tube 2 by the repulsive elastic force thereof.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a suction operation device for an endoscope. Background Art] A suction operation device for an endoscope is usually a control section of an endoscope. A piston is installed in a cylinder that is connected to a suction tube that opens at the tip of the insertion section of an endoscope, and a piston is inserted into the cylinder so that it can move forward and backward.

[Problems to be Solved by the Invention] However, the above-mentioned endoscope suction operation device has a large number of parts and a complicated structure, so the suctioned dirty liquid etc. tends to get stuck between the parts, making it difficult to completely clean them. It was extremely difficult to do so. Furthermore, because it was impossible to make the device disposable due to economic reasons, there were hygienic problems, such as the risk of infection from one patient to the next.

Therefore, for example, in a standby state, there has been a device in which the operation section presses the tube in the radial direction to close it, and then suction is performed by opening the blocked suction tube.

With such a device, the sucked liquid does not come into contact with anything other than the tube, so it is possible to make only the tube disposable. However, in order to crush the tube itself from the side, a large amount of operating force is required, which has the drawback of extremely poor operability.

Therefore, in order to reduce the amount of operating force, it is possible to reduce the wall thickness of the tube, but if the wall thickness of the tube is made thinner, the restoring force when the pressing operation is released will be weakened.
Alternatively, the tube may be crushed and occluded by the suction force, making it impossible to perform suction.

This invention eliminates such conventional drawbacks, makes the part that comes into contact with the suctioned waste liquid disposable, has a simple structure, and allows the suction operation to be performed reliably with a small amount of force. The purpose of the present invention is to provide a suction operation device for an endoscope.

[Means for Solving the Problems] In order to achieve the above object, the endoscope suction operation device of the present invention communicates with the suction means from the proximal end.

A flexible tube whose distal end communicates with the suction port that opens at the distal end of the insertion section of the endoscope is placed in the operating section of the endoscope, and a flexible tube is placed in the middle of the tube in the direction from the proximal end to the distal end. A standby state in which a diagonal linear cut is formed and the tube is pressed radially from the cut side of the cut to close the cut on the side leading to the tip side, and a standby state in which the tube is restored to a free state and the tip is closed. The present invention is characterized in that a suction operating means is provided for switching between a suction state in which suction is performed from the side to the proximal end.

[Operation] In the standby state, the tube is pressed laterally from the cut end side of the incision, and the cut end on the side leading to the distal end side is crushed and occluded. If the suction means is activated at this time,
Atmospheric air is sucked through the opening on the unpressed side of the cut.

In the suction state, the tube returns to its free state, at which time the cut end on the pressed side remains stuck inside the cut end on the opposite side. Therefore, the tube is closed off from the atmosphere at the cut portion, and suction is performed from the suction port at the tip of the insertion portion.

[Example] Examples will be described with reference to the drawings.

FIG. 1 shows an embodiment of the invention. In the figure, ■ is an operating section of the endoscope, and a flexible tube 2 made of, for example, tetrafluoroethylene is disposed inside the operating section. The proximal end of the tube 2 is connected to a suction means 3, and the distal end thereof is connected to a suction port 5 that opens at the distal end of the insertion section 4 of the endoscope.

Therefore, the sewage etc. in the body cavity can be removed from the suction port 5 through the tube 2.
Suction can be drawn into the suction means 3 through the inside.

The tube 2 may be arranged along the outside of the operating section 1 and the insertion section 4, or may be configured to be detachable from the endoscope, or the tube 2 may be divided into several parts in the middle. They may also be connected to each other.

As shown in FIG. 2, the tube 2 has a diagonal linear cut 6 inside the operating section 1 from the side communicating with the suction means 3 to the side communicating with the suction port 5. It is formed of. This cut 6 is formed by cutting with a sharp blade such as a razor at an angle of about 20 degrees to 45 degrees to the tube axis to a depth of about two-thirds of the diameter of the tube 2. It is. Further, as shown in FIG. 4, the tube 2 has a bamboo leaf-shaped section (hereinafter referred to as "flap 6a") that is inserted into the inside of the opposite side. is set to .

Returning to FIG. 1, inside the operating part l, there is a suppression plate 7 that can crush the tube 2 by pressing it laterally from the cut end side of the notch 6 in a direction perpendicular to the tube 2 (the diameter of the tube direction). On the suppression plate 7,
As shown in FIG. 3, a hole 7a is bored through which the tube 2 is inserted, and a portion of the hole 7a on the side that presses the tube 2 is formed into a straight line. 7b is a notch for inserting and removing the tube 2 when the tube 2 is installed or replaced.

In order to prevent the tube 2 from moving in the direction in which it is pressed, the portions before and after the notch 6 are passed through a guide groove a formed in the operating portion l. Therefore, when the tube 2 is pressed from the cut side by the suppression plate 7, the flap 6a of the notch 6 is pressed by the pressure plate 7 against the inner wall 1b of the operating section on the opposite side of the tube, as shown in FIGS. 1 and 3. To,
The cut on the side leading to the distal end of the tube 2 is closed.

The suppression plate 7 is connected to the operation button 8 via a connecting rod 8a. This operating button 8 has a receiver fixed to the operating part 1 that is fitted into a metal plate 9 so as to be able to move forward and backward.
The compression coil spring 10 interposed between the outside (
(to the left in Figure 1) is always energized. therefore,
In the standby state, the pressing plate 7 always presses the tube 2. When the operation button 8 is pushed in, the suppression plate 7 is retracted from the tube 2 and the pressed state is released.

In the above embodiment configured in this way.

In the standby state, as shown in Figures 1 and 3,
The tube 2 is pressed by the pressing plate 7. Therefore, even if the suction means 3 is operated, the incision at the tip of the insertion section on the side communicating with the suction port 5 is closed, so the suction port 5 is closed.
There is no suction from.

Outside air is sucked into the tube 2 through the opening of the cut 6.

At this time, due to an increase in the patient's body cavity pressure,
Even if dirty liquid or the like enters the tube 2 from the suction port 5, the dirty liquid 20 is blocked from advancing behind the flap 6a that closes the tube 2 and accumulates there, as shown in FIG. Furthermore, even if the tube 2 is not completely occluded at that part, the dirty liquid 20 will only be sucked in small amounts into the constantly operating suction means 3 and will not leak to the outside. .

Next, as shown in FIG. 4, when the operation button 8 is pressed and operated, the suppressed state is released, the notch 6 of the tube 2 is closed to the outside air, and the suction port 5 at the tip of the insertion section 4 is also sucked. will be held. At this time, flap 6 of cut 6
As shown in FIG. 4, the portion a sinks into the inside of the cut on the opposite side and is stopped in a state in which it is pressed against the inner surface of the tube 2 due to its repulsive elastic force. Therefore, no leakage of suction to the outside occurs in this part.

Note that it is more effective to surround the notch 6 of the tube 2 with a soft bag or the like to prevent leakage in case of an emergency.

[Effect of the invention] According to the endoscope suction operation device of the present invention.

The structure is extremely simple and the operation is simple, as the suction state and standby state can be switched by simply forming a notch in the tube and pressing the notch from the side. The force required is light and the operability is very good.As a result, a thick-walled tube can be used, so collapse of the tube during suction can be completely prevented.

Furthermore, in the endoscope suction operation device of the present invention, only the inner surface of the tube comes into contact with the suctioned sewage.
It is also extremely hygienic, as only the tube can be made disposable and infection from one patient to another can be prevented.

[Brief explanation of the drawing]

Fig. 1 is an overall schematic diagram of an embodiment of the present invention, Fig. 2 is a partial side view of a tube of the embodiment, Fig. 3 is a plan cross-sectional view of the pressure plate and tube of the embodiment, and Fig. 4. 2 is a partially enlarged side sectional view of the embodiment in a state where the operation button is pushed in. FIG. ■... Operating unit, 2... Tube, 3... Suction means, 4... Insertion part, 5... Suction port, 6... Notch,
6a...Flat 7...Press plate,

Claims (1)

[Scope of Claims] A flexible tube is disposed in the operating section of the endoscope, and the proximal end communicates with the suction means and the distal end communicates with the suction port opened at the distal end of the insertion section of the endoscope. In the middle of the tube, a diagonal linear cut is formed from the proximal end to the distal end, and the tube is pressed radially from the cut end of the cut to close the cut leading to the distal end. a standby state to
A suction operation device for an endoscope, comprising a suction operation means for switching between a suction state in which the tube is restored to a free state and suction is performed from the distal end to the proximal end.