JPH01274730A - Suction device for endoscope - Google Patents

Abstract

PURPOSE:To improve safety of an organism and inspection and medical treatment workability, by a method wherein valve bodies located in a line connected to a suction pump and a communication passage through which the line and the open air are intercommunicated repeat opening and closing alternately and intermittently. CONSTITUTION:The one end of a first line 5 is connected to the base end of a suction line 2 through a joint 4 positioned to the base end thereof, and the other end is connected to a joint 7 of a control device 6. A first solenoid on-off valve 13 is located in a line 11 having the one end connected to the joint 7 and the other end connected to a suction pump 22. A line 11a between the joint 7 and the solenoid on-off valve 13 is communicated to a line 11b between the solenoid on-off valve 13 and a pressure switch 12 through a communication passage 14. The one end of a line 16 is connected to a communication passage 14a between a check valve 15 located in the communication passage 14 and a connection part thereof to the line 11b, and the other end thereof is released to the open air. A second solenoid on-off valve 17 is located. The opening and closing motions of the solenoid on-off valves 13 and 17 are alternately repeated at a proper period, and a negative pressure in the suction line 2 is suppressed to a value at which no hazard occurs.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to an improvement in a suction device for an endoscope, which is provided in an endoscope to ensure a view of an observation site.

(Conventional technology) Endoscopes used for examination and treatment inside the body cavities of living bodies include:
A suction device is provided at the distal end of an endoscope insertion section (hereinafter referred to as a scope), and has a conduit that passes through the scope and is connected to a suction pump provided outside the body cavity at the other end. ing. This suction device is used to secure the visual field of the observation site by suctioning mucus, food residue, filth, etc. present in the observation site, such as the inside of the digestive tract using a scope, and discharging it from the body.

However, when a scope is inserted into a body cavity and the suction device attempts to suction out waste, etc., the suction force of the suction pump causes the frontage of the suction conduit provided at the tip of the scope to slip into the wall of the digestive tract, etc. There was a problem that it could be adsorbed to.

As a result, the objective part of the observation optical system installed at the tip of the scope approaches the tube wall at the Fi end, which not only makes it impossible to obtain a field of view for observation, but also increases the possibility of perforation of the tube wall due to its suction force. was there. The risk was particularly high in cases with thin tube walls, such as the large intestine.

On the other hand, in the suction device provided in the conventional endoscope, the suction pump operates continuously while the operation button for the suction operation is pressed, and the suction operation continues. For this reason, conventionally, in order to avoid the above-mentioned danger, the operator has performed an intermittent operation by pressing and releasing the operation button.

(Problem to be solved by the invention) However, among the above conventional methods? [According to the document, the purpose is to prevent obstruction of the field of view and perforation of the wall of the living body tube when a scope is inserted into the body cavity of a living body and dirt, etc. from the observation area is suctioned out by a suction pump via the suction line. However, in order to operate the suction pump intermittently, the suction pump button must be pressed frequently, which poses a problem in that the operator's fingers become fatigued significantly.

The present invention has been made in view of the above-mentioned problems, and its purpose is to reduce the burden on the operator, prevent the occurrence of perforation due to adsorption of the biological tube wall, and secure the field of view for observation. An object of the present invention is to provide a suction device for an endoscope that can be used as a suction device for an endoscope.

[Configuration 1 of the Invention (Means for Solving Problem 81) The present invention has one end opened at the distal end of a scope inserted into the body cavity of a living body, and the other end connected to a suction pump driven outside the body cavity. a first valve body provided in the conduit for opening and closing the conduit, one end communicating with the conduit,
A suction device for an endoscope, comprising: a communication passage whose other end is open to the atmosphere; and a second valve body provided in the communication passage for opening and closing the communication passage; The gist of the present invention is to provide a control means for repeating the opening and closing operations of the two valve bodies alternately and intermittently.

(Function) In the endoscope suction device according to the present invention, when the first valve body is opened and the suction pump is operated to suction dirt etc. from the tip of the scope through the conduit, the suction device is connected to the conduit. The second valve body that opens and closes the communication passage installed in the pipe repeats the opening and closing operation intermittently and automatically by the control means, so the inside of the pipe is intermittently communicated with the atmosphere, and the negative pressure inside the pipe is reduced. You can suppress the rise. As a result, the suction phenomenon in which the tip of the scope suctions the wall of the living body due to the suction operation is prevented.
It becomes possible to secure the field of view of the observation site and to prevent the risk of perforation of the tube wall of the living body without placing any burden on the operator.

(Embodiment) FIG. 1 is a block diagram schematically showing an embodiment of an endoscope suction device to which the present invention is applied.

In the figure, a scope 1 is provided with a suction conduit 2 in the axial direction, and the distal end of the suction conduit 2 opens at the distal end of the scope 1 for insertion into a body cavity. Further, one end of a first pipe line 5 is connected to the M end of the suction pipe line 2 via a joint 4 provided on the hand control unit 3 of the scope 1, and the other end of the first pipe line 5 is connected to the M end of the suction line 2. is connected to a joint 7 provided on the control bag W6.

Furthermore, the hand operation unit 3 is provided with a suction switch 8 for operating a suction pump, which will be described later, and a button 9 for pressing the switch 8. This switch 8 is electrically connected to a connector 10 provided on the control device 6.

A second pipe line 11 having one end connected to the joint 7 is provided in the control device 6, and a pressure switch 12 is attached to the other end of the second pipe line 11. Further, a first electromagnetic on-off valve 13 is provided in this second conduit 11, and a second conduit 11a between the joint 7 and this first electromagnetic on-off valve 13, A second conduit 11b between the electromagnetic on-off valve 13 and the pressure switch 12 is communicated with each other through a communication path 14. And this communication path 14
is provided with a check valve 15, and one end of a third pipe line 16 is connected to a communication path 14a between the check valve 15 and the connection part with the second pipe line 11b. ing. The other end of this third conduit 16 is open to the atmosphere, and the third conduit 16 is provided with a second electromagnetic on-off valve 17.

Further, one end of a fourth pipe line 18 is connected between the connection part of the second pipe line 11b with the communication path 14a and the pressure switch 12, and the other end of the fourth pipe line 18 is connected to the pressure switch 12. is connected to a joint 19 provided on the control device 6. One end of a fifth conduit 20 is connected to this joint 19, and the other end of this fifth conduit 20 opens into a sealed suction bottle 21. Moreover, the air within this suction bottle 21 is suctioned by a suction pump 22.

On the other hand, a control circuit 23 is provided within the control device 6, and this control circuit 23 is configured by a combination of a general logic circuit and a timer circuit. This control circuit is connected to the connector 10. An indicator lamp 24 that displays whether the mode is continuous suction or intermittent suction, an opening/closing lamp 24 for the electromagnetic on-off valve when in intermittent suction mode, a knob 25 that selects the opening/closing timing of the electromagnetic on-off valve when in intermittent suction mode, and continuous suction. a switch 26 for switching between mode and intermittent suction, and a pressure switch 12 for detecting whether or not the suction pump 22 is in operation.
are electrically connected to each other, and the electromagnetic on-off valves 13.
17 opening/closing control is performed.

Next, the operation of this embodiment will be explained. While the suction pump 22 is operating, the inside of the suction bottle 21 is in a negative pressure state. The suction state at this time is as follows depending on the states of the first and second electromagnetic on-off valves 13 and 17.

(1) The first electromagnetic on-off valve 13 is open, the second electromagnetic on-off valve 1
When 7 is closed, pipe 2-)5-)11a-)13-sl 1b-)1
A suction operation is performed along the route 8-+20→bottle 21. The conduit 14 is closed by the action of a check valve 15.

, (2) When the first electromagnetic on-off valve 13 is closed and the second electromagnetic on-off valve 17 is open, the inside of the suction bottle 21 communicates with the atmosphere through the path of pipe 16 → 14a - + 11b → 18 → 21, Reduce the pressure inside the bottle to atmospheric pressure level. At the same time, the negative pressure in the suction pipe 2 is eliminated, and the pressure inside the suction pipe 2 is lowered to the atmospheric pressure level along the route of pipe 16→14→check valve 15→pipe 11a→5→2.

The opening and closing operations of these first and second electromagnetic on-off valves 13 and 17 are performed after switching the switch 26 to the intermittent suction mode side and adjusting the timing of opening and closing of the electromagnetic on-off valves 13 and 17 with the knob 25. By pressing the push button 9 of the suction switch 8 provided on the hand operation unit 3, the operation is repeated at an appropriate cycle via the logic circuit and timer circuit provided in the control circuit 23.

FIG. 2 shows the relationship between the opening and closing operations of the electromagnetic on-off valves 13 and 17 and the negative pressure in the suction pipe 2 of the scope 1 according to this embodiment.

When the first electromagnetic on-off valve 13 is open, the second electromagnetic on-off valve 17
When the suction pump 22 is in the open state, the negative pressure inside the suction pipe line 2 after adsorption increases due to the action of the suction pump 22. If this state continues, the negative pressure will rise extremely, as shown by the two-dot chain line in the figure, and will become so high that there is a risk of perforation of the gastrointestinal wall. However, as described above, immediately after the first electromagnetic on-off valve 13 is closed and the second electromagnetic on-off valve 17 is opened, the suction pipe 2 is communicated with the atmosphere, and the negative pressure inside the suction pipe 2 is reduced. It will be resolved immediately. Therefore, by selecting appropriate timing for repeating the opening and closing of the electromagnetic on-off valves 13 and 17, the negative pressure within the suction line 2 can be suppressed to a low level where there is no risk of perforation of the gastrointestinal wall or the like.

This repeated operation of opening and closing continues as long as the push button 9 of the suction switch 8 is pressed.

According to this embodiment, even if the push button 9 of the suction switch 8 is pressed continuously, the adsorption phenomenon that adsorbs the digestive tract wall of the living body as in the conventional case does not occur, so the risk of perforation can be prevented. , the safety of living organisms can be ensured. Furthermore, there is no need for the operator to frequently press and release the push button 9, and the electromagnetic on-off valves 13 and 17 open and close automatically, which significantly reduces the burden on the operator. It is possible to secure the field of view of the observation area with the mirror,
Improves work efficiency.

In the above embodiment, the pipes 14a and 11 are not in the suction state.
b is connected and the negative pressure inside the suction bottle 21 is reduced to atmospheric pressure. You don't have to.

In addition, a pressure switch 12, an indicator lamp 24, a knob 25
, the switch 26 may be omitted, and the conditions set by these may be provided as fixed conditions in the control circuit 23.

[Effects of the Invention] As explained above, the endoscope suction device to which the present invention is applied has a pipe line that connects the suction pump and the suction pipe line in the scope, and a pipe line that connects the atmosphere. The communication passages that communicate with each other are provided with valve bodies that can be opened and closed, and these valve bodies are alternately and intermittently opened and closed by a control means, thereby preventing the adsorption phenomenon of the tip of the scope to the wall of the in-vivo tube. It is possible to prevent this from occurring, eliminate the risk of perforation of the tube wall, and ensure the safety of the living body. Moreover, the burden on the operator can be significantly reduced, and the workability of examinations and treatments using an endoscope can be improved.

[Brief explanation of the drawing]

Fig. 1 is a block diagram schematically showing an embodiment of an endoscope suction device to which the present invention is applied, and Fig. 2 shows the relationship between opening and closing of the electromagnetic on-off valve and negative pressure in the suction pipe according to the present embodiment. It is a graph showing a relationship. 1... Endoscope 2... Suction pipe line 5.11,
16.18.20...Pipeline 6...Control device 13...First electromagnetic on-off valve (first valve body) 14...
Communication path 17...Second electromagnetic on-off valve (second valve body) 22...
Suction pump agent Patent attorney Kensuke Kondo Attorney Patent attorney Takeshi Kondo

Claims (1)

[Claims] A conduit with one end opened at the tip of the endoscope insertion part inserted into the body cavity of a living body and the other end connected to a suction pump driven outside the body cavity, and a conduit provided in the conduit and connected to the conduit. a first valve body that opens and closes; a communication passage whose one end communicates with the pipeline and whose other end opens to the atmosphere; and a second valve body that is provided in the communication passage and opens and closes the communication passage. A suction device for an endoscope, comprising a control means for alternately and intermittently repeating the opening and closing operations of the first and second valve bodies. Suction device.