JPH07148109A - Sucking apparatus for endoscope - Google Patents

Abstract

PURPOSE:To provide a sucking tube system to suck body fluid frost the cavity of a patient body with sucking pressure by inserting an endoscope inside the patient's cavity, capable of having a start with milder sucking pressure, by installing a buffer to moderate rapid increase of sucking pressure inside this sucking tube systems. CONSTITUTION:An endoscope comprises a movable tube l to insert into the patient's cavity being connected to the console through operation part 1b, a universal cable 1c, and connecotor 1e, and having a sucking tube 2 inside the scope for a passage of the body fluid being sucked. This sucking tube 2 is connected to a sucking apparatus 5 through a sucking cap 1d and a bulb 4. For such an apparatus, bellows 3 is installed at the position between the sucking cap 1d and the bulb 4 as a buffer. The bellows 3 is fully stretched before sucking begins, but is moving to shrink once sucking starts with the sucking apparatus 5 in operation, and thereby the rapid change in sucking pressure may be suppressed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope suction device, and more particularly to a technique for preventing a sudden change in suction pressure.

[0002]

2. Description of the Related Art In recent years, endoscope devices have been widely used as medical diagnostic devices have been developed. The endoscopic device is a device in which a scope having an imaging element mounted at its tip is inserted into a body cavity, and an image of the inside of the body is captured for diagnosis. In such an endoscope device, a device to which a suction device is attached in order to take out a body fluid in a patient's body as a sample has been used in recent years. This will be described below with reference to FIG.

FIG. 4 is an explanatory view schematically showing a general endoscope, and a flexible tube 1 to be inserted into a body cavity of a patient.
Is the operating portion 1b, the universal cord 1c and the connector 1
It is connected to a console (not shown) via e. Also,
An operation button 1a for performing an operation is attached to the operation unit 1b.

Inside the scope, there is provided a suction conduit 2 which serves as a passage for sucking body fluid.
It is connected to one end of the valve 4 via d. The other end of the valve 4 is connected to the suction device 5.

Therefore, by inserting the flexible tube 1 into the body cavity of the patient, driving the aspirator 5 and appropriately adjusting the valve 4, the body fluid can be aspirated from the patient's body.

FIG. 5 is a characteristic diagram showing a change in suction pressure when the suction device 5 is driven. In FIG. 5, “ON” is the time when the valve 4 is “open” and “OFF” is the valve. The time when 4 is set to “closed” is shown. As is clear from the figure, the suction pressure changes abruptly when suction is started and when suction is stopped.

[0007]

As described above, in the conventional endoscope suction device, the valve 4 is digitally opened and closed by the electric switch. Therefore, when a suction switch (not shown) is turned on, suction starts suddenly, and the suction pressure at the suction port rises sharply, which may injure the patient.

The present invention has been made in view of the above circumstances, and is intended to slow down the rise of suction at the suction port to remove the risk of damaging the patient and to injure the patient. The purpose is to remove the anxiety of the operator and reduce the burden on the operator.

[0009]

In order to achieve the above object, in the suction device for an endoscope according to claim 1, the suction conduit system buffers a sudden increase in suction pressure in the suction conduit system. It is characterized by having a buffer for

The suction device for an endoscope according to a second aspect of the present invention is characterized in that the buffer is a bellows tube whose volume gradually decreases when the suction pressure rapidly increases.

According to another aspect of the suction device for an endoscope of the present invention, the buffer is provided with a valve provided so as to be openable and closable so as to partition the inside and outside of the suction conduit system, and the valve is biased against the suction pressure. And a biasing means for performing a sudden increase in the suction pressure,
The valve is slowly closed.

[0012]

In the present invention constructed as described above, when the suction switch is turned on and the valve is opened, the volume of the bellows tube is gradually reduced, or the valve is gently coupled with the taper portion while pressing the biasing means. To do.

Therefore, the rise of the suction pressure at the suction port portion rises more gently than in the conventional example. As a result, the risk of damaging the patient can be eliminated.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing the main part of an endoscope suction device according to an embodiment of the present invention. In the figure, the same symbols as the symbols shown in the conventional example are the same elements. The present embodiment is different from the conventional example of FIG. 4 in that the bellows tube 3 is attached to the suction conduit 2 at a position between the suction mouthpiece 1d and the valve 4. The bellows tube 3 takes in and releases the sucked air by its expanding and contracting operation.

Next, the operation of this embodiment will be described.
FIG. 2 is a characteristic diagram showing changes in suction pressure at the suction port portion, and (A) to (F) show the bellows tube 3 at each time.
It is explanatory drawing which shows the expansion-contraction state of typically.

In the figure, in the state before the suction is started, the bellows tube 3 is completely extended as shown in (A). Then, when the suction device 5 is driven and the valve 4 is opened, suction is started, and the suction pressure causes the bellows tube 3 to start contracting as shown in (B). That is, a rapid change in suction pressure is suppressed by the bellows tube 3, and the suction pressure at the suction port portion slowly rises as shown in the characteristic diagram.

After that, when the suction pressure reaches a certain level, the bellows tube 3 is in a fully contracted state as shown in (C). Then, when the suction is completed and the valve 4 is closed, the abrupt change in the suction pressure causes the bellows tube 3 to extend this time as shown in (D) to (F). As a result, the sudden change in the suction pressure at the suction port is alleviated, and the suction pressure is gradually reduced as shown in the characteristic diagram. In this way, a sudden change in suction pressure at the suction port can be suppressed.

Thus, in this embodiment, the suction conduit 2
Since the bellows tube 3 is attached to, the rise of the suction pressure at the suction port can be made gentle when the suction switch is turned on and the valve 4 is opened. by this,
It is possible to ensure safety during suction. If the bellows tube 3 can be removed, the inside can be easily cleaned.

FIG. 3 is a constitutional view showing another embodiment of the present invention. In this embodiment, the taper portion 32, the lid portion 31, and the spring 33 are provided in the suction pipe line 2 between the suction mouthpiece 1d and the valve 4.
Valve is attached. In this valve, when the spring 33 extends, the lid portion 31 and the taper portion 32 are separated from each other to open the suction conduit 2 to the outside (see FIG. A), and when the spring 33 contracts, the lid portion 31 and the taper portion 32 are separated. It operates so as to contact and close (see B in the same figure).

Therefore, when suction is started, the lid portion 31 is attracted by the suction pressure, the spring 33 contracts, and the valve is closed. This action alleviates a sudden pressure change at the suction port portion. To be done. Further, when the suction is stopped, the spring 33 extends and the suction pipe line 2 is opened to the outside. Therefore, it is also possible to suppress a sudden change in the suction pressure at the suction port.

In this way, also in the other embodiments, the sudden change of the suction pressure can be prevented as in the above-mentioned embodiments, so that the safety can be improved.

[0023]

As described above, according to the present invention,
Since the buffer for buffering a sudden increase in the suction pressure in the suction pipeline is connected to the suction pipeline of the endoscope, the rise of suction becomes gentle.

As a result, the risk of damaging the patient can be eliminated, and the operator's anxiety about whether or not to injure the patient can be removed, so that the burden on the operator can be reduced. The effect is obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of essential parts showing an embodiment of a suction device for an endoscope of the present invention.

FIG. 2 is a characteristic diagram for explaining the operation of the bellows tube in the embodiment of FIG.

FIG. 3 is a sectional view of an essential part of another embodiment of the endoscope suction device of the present invention.

FIG. 4 is a cross-sectional view of essential parts showing an example of a conventional endoscope suction device.

FIG. 5 is a characteristic diagram showing changes in suction pressure in the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Flexible tube 1d Suction mouthpiece 1e Main body connection connector 2 Suction line 3 Bellows tube 4 Valve 5 Suction device 31 Lid part 32 Tapered part 33 Spring

Claims (3)

[Claims] 1. A suction conduit system for sucking the body fluid in the patient's body cavity by suction pressure when the endoscope is inserted into the body cavity of the patient to diagnose / treat the body, and suction for generating the suction pressure. In a suction device for an endoscope including a suction device, the suction pipe line system comprises a buffer for buffering a sudden increase in suction pressure in the suction pipe line system. apparatus. 2. The suction device for an endoscope according to claim 1, wherein the buffer is a bellows tube that gradually decreases in volume when the suction pressure rapidly increases. 3. The suction buffer is provided with a valve that is openable and closable so as to partition the inside and outside of the suction pipe line system, and a biasing unit that biases the valve against the suction pressure. The suction device for an endoscope according to claim 1, wherein the valve is slowly closed when the pressure increases rapidly.