JPH0347256A - Suction apparatus - Google Patents

Abstract

PURPOSE:To perform safely and efficiently an operation by providing a passing switch part positioned between a connecting part of a path connected with a pressurizing part and a holding part, and opening and closing the passage of a sucked substance in the path. CONSTITUTION:When suction is performed, the pressure of a holding part 70 is reduced by means of a reduced pressure adjusting part 60 and a passing switch part 80 is opened and a pressure adjusting part 30 stops a pressure from a pressurizing part to suck a sucked substance 34 from a suction hole 15. When suction is stopped, the inside of the holding part is made at the atmospheric pressure by means of the reduced pressure adjusting part 60 and the passing switch part 80 is closed. When back flow is performed, the holding part 70 is made at the atmospheric pressure by means of the reduced pressure adjusting part 60 and the passing switch part 80 is closed and a pressure from the pressurizing part is adjusted at a certain pressure by means of the pressure adjusting part 30 to pass the pressure in a suction path 40 and to make a back flow of the sucked substance 34. It is possible to make a back flow of the sucked substance 34 and in addition, it is possible to get rid of a remaining pressure in a pipe regardless of the value of the suction pressure just before stopping suction.

Description

[Detailed description of the invention] Industrial applications This invention relates to a suction device used during ophthalmic surgery.

BACKGROUND ART In vitreous surgery and cataract surgery, the contents inside the eyeball are sometimes sucked out using a suction device.

For example, in vitrectomy surgery, the cloudy vitreous is suctioned out of the eye and replaced with irrigation fluid to restore intraocular pressure.

The following suction devices have been proposed.

■ The suction device has a cutter. A cutter is inserted into the eyeball and removes the vitreous.

The vitreous body, which is the object to be aspirated, is sucked in through the suction port at the tip of the cutter and sent through the passage into the evacuated storage section.

■With another suction device, when suction to the storage part is stopped,
Some are equipped with a valve that opens to the atmosphere to release residual pressure in the passage.

Problem to be Solved by the Invention In eye surgery using a suction device, the vitreous is carefully removed, but sometimes the detached retina is suctioned out, or it cannot be removed at once. Fibers may be absorbed.

In this case, it becomes necessary to cause the object to be aspirated to flow backward in order to return the retina and fibers that were about to be aspirated.

However, conventional devices of this type do not have a function to reverse the suction, and in this case, immediately stop the suction and squeeze the part of the pipe from the cutter to the storage part with your finger. The suctioned material was being refluxed. As a result, the surgery is interrupted and cannot be performed efficiently.

In addition, in the suction device described in (3), if the pipe is only opened to the atmosphere to release the residual pressure when suction is stopped, the pipe is long, so it takes time to release the residual pressure, and when suction is stopped, the pipe is immediately released. The suction doesn't stop.

Further, the time required to remove the residual pressure in the pipe varies depending on the level of suction pressure immediately before the suction is stopped. If the suction pressure is low, the residual pressure can be lowered, but it takes longer. Furthermore, there is no function to reverse the suction object.

Purpose of the Invention The present invention provides a suction device that is capable of causing a suction object to flow backwards and that can immediately eliminate residual pressure in a pipe regardless of the level of suction pressure immediately before suction is stopped. The purpose is to

SUMMARY OF THE INVENTION The gist of the present invention is a suction device as set forth in the claims.

Means to solve problems The suction port 15 sucks the object to be sucked 34 .

The suction passage 40 guides the object to be sucked 34 from the suction port section 15 to the storage section 70 . The storage section 70 stores the object to be sucked 34 . The pressure reduction adjustment section 60 reduces the pressure inside the storage section 70 in order to suck the suction object 34 into the storage section 70 . The pressure detection section 50 detects the pressure inside the housing section 70 . A compression pump 31 as a pressurizing section is provided in the middle of the suction passage 40. The pressure adjustment section 30 adjusts the pressure of the pressure section.

The passage opening/closing part 80 is provided in the suction passage 40 between the connecting part of the suction passage 40 to which the pressurizing part is connected and the accommodating part 70, and opens and closes passage of the object to be sucked 34 in the suction passage 40.

Effect (1) At the time of suction, the pressure in the accommodating part 70 is reduced by the pressure reduction adjustment part 60. The passage opening/closing section 80 is opened, and the pressure adjusting section 30 stops the pressure from the pressurizing section. The object to be sucked 34 is sucked from the suction port 15 .

(2) When the suction is stopped, the pressure reduction adjustment section 60 makes the inside of the storage section 70 atmospheric, and the passage opening/closing section 80 is closed.

(3) At the time of backflow, the accommodation section 70 is
The passage opening/closing section 80 is closed with the air being exposed to the atmosphere. The pressure adjusting section 30 adjusts the pressure from the pressurizing section to a certain pressure, and passes the pressure through the suction passage 40 to cause the object to be sucked 34 to flow backward.

Embodiment 1 FIG. 1 shows a suction device of the present invention installed in an ophthalmic surgical apparatus.

In ophthalmic surgery, an aspirated object 34, which is a cloudy part of the gel-like vitreous body between the crystalline lens a of the eyeball 13 and the retina, is removed by suction and replaced with a clear liquid.

This allows light to pass through the crystalline lens a and reach the retina, thereby restoring vision.

The suction device includes a cutter 20, a pressure adjustment section 30, a compression pump 31 as a pressure section, a suction passage 40, and a pressure detection section 50.
, a pressure reduction adjustment section 60, a housing section 70, and a passage opening/closing section 80.

[Cutter 20] The cutter 20 cuts off the object to be aspirated 34 inside the eyeball 10 and suctions it from the suction port 15.

[Suction passage 40] The suction passage 40 connects the suction port 15 of the cutter 20 and the housing section 7.
0, and the sucked object 34 is stored in the storage section 70.
lead to.

[Pressure adjustment section 30 and compression pump 31] A tube 41 branches off from the middle of the suction passage 40.

Tube 41 further branches into tubes 42, 43. The tube 42 is provided with a valve 44, and the tube 43 is provided with a valve 45, respectively. A compression pump 31 is connected to the tube 43.

The opening and closing of the valves 44 and 45 are controlled by the control section 46.

[Pressure detection unit 50] The pressure detection section 50 detects the pressure inside the housing section 70.

[60 decompression adjustment parts The pressure reduction adjustment section 60 is for reducing the pressure inside the housing section 70 .

It has a vacuum pressure adjustment section 90 and a vacuum pump 91.

The vacuum pressure adjustment section 90 includes a motor 92, a rack 93, a pinion 94, an atmosphere release tube 95, and a pressing member 96.

The atmosphere release tube 95 is for returning the pressure inside the housing section 70 from a reduced pressure state to the atmosphere. By rotating the motor 92, the flexible atmosphere release tube 95 is closed or opened by the holding member 96. vacuum pump 91
reduces the pressure inside the housing section 70. The pressure inside the housing section 70 is set to a predetermined value depending on the degree of operation of the vacuum pump 91 and the degree of opening of the atmosphere release tube 95.

[Pass opening/closing section 80] The passing opening/closing section 80 is a pinch valve. It is provided in the middle of the suction passage 40 to control the suction passage of the suction target 34. The passage opening/closing part 80 is provided between the tube 41 and the branch part of the suction passage 40 and the accommodating part 70. In addition, 98
is a liquid level detector which detects when the suction target 34 in the storage section 70 reaches level A to prevent overflow.

[Suction operation] When the power is turned on, the vacuum pump 91 and the compression pump 31
moves. The motor 92 moves so that the rack 93 of the vacuum pressure adjustment section 90 opens the atmosphere release tube 95, and the valve 44.
45 and the passage opening/closing part 80 are closed.

When the operator sends a signal to start suction using a foot switch or the like, the motor 92 of the vacuum pressure adjustment section 90 moves in the direction of closing the atmosphere release tube 95, thereby evacuating the housing section 70. Further, the passage opening/closing section 80 opens, and the object to be aspirated 34 inside the eyeball 10 is sucked into the housing section 70 via the suction passage 40 .

When the pressure detection section 50 detects that the pressure inside the suction accommodation section 70 has reached a predetermined pressure, the motor 92 of the vacuum pressure adjustment section 90 is activated.
is stopped, and the diameter of the atmosphere release tube 95 is kept in that state.

Further, when the pressure detection unit 50 detects that the pressure has become higher than a predetermined pressure, the motor 92 moves in a direction to increase the diameter of the atmosphere release tube 95.

Furthermore, when it is detected that the pressure has become lower than a predetermined pressure, the motor 92 moves in a direction in which the diameter of the atmosphere release tube 95 becomes smaller. In this way, the pressure detection section 50 functions to monitor the pressure inside the housing section 70. Further, the vacuum pressure adjustment section 90 functions to vary the amount of opening of the inside of the housing section 70 to the atmosphere.

[Suction stop operation] When you release the foot switch to stop suction, motor 9
2 moves so that the atmosphere release tube 95 is fully opened. Also, the passage opening/closing section 80 is closed to stop the suction passage 40. At the same time, the pressure signal monitored by the pressure detection unit 50 immediately before the suction stop, that is, the signal of the minimum pressure immediately before the pressure detection unit 50 becomes 0 (atmospheric pressure), is sent to the control unit 46 of the pressure adjustment unit 30.

The control unit 46 controls the valve 4 according to the minimum pressure signal.
By turning on and off 4.45, additional pressure is sent to the suction passage 40 so that the minimum pressure becomes 0 (atmospheric pressure) or positive pressure. That is, when the minimum pressure is low, the valves 44 and 45 are turned on and off so that the additional pressure going from the pressure adjustment section 30 to the suction passage 40 becomes stronger. When the minimum pressure is high, the valves 44 and 45 are turned on and off so that the additional pressure from the pressure adjustment section 30 to the suction passage 40 is weakened.

For example, to increase the pressure, open valve 45 and open valve 4.
Close 4. Also, to make the pressure weaker than that, valve 4
5 is left open and the valve 44 is opened or closed.

Also, to weaken the pressure, close the valve 45 and close the valve 4.
Open 4 (open to atmosphere) To make it stronger, open valve 45 and then open and close valve 44.

In this manner, the pressure adjusted by the pressure adjustment section 30 in accordance with the pressure signal is sent into the suction passage 40, instantly providing atmospheric pressure or positive pressure and eliminating residual pressure. This causes suction to stop immediately.

[Backflow operation] In addition, if a retina that is about to be detached is suctioned during suction, or if the object to be aspirated 34 that cannot be removed at once is suctioned, the suction port 15 or the inside of the cutter 20 or the suction passage 40 may be suctioned. The suction object 34 gets stuck inside. In this case, it is necessary to reverse the flow.

When the backflow switch on the foot switch is pressed, the passage opening/closing section 80 stops and the motor 92 of the vacuum pressure adjustment section 90 moves so that the atmosphere release tube 95 is fully opened. Furthermore, the valves 44 and 45 of the pressure adjustment section 30 are adjusted so that positive pressure for backflow is applied within the suction passage 40.

For example, when valve 45 is opened and valve 44 is closed,
Strong pressure is applied to the suction passage, and if a weaker pressure is to be sent, valve 45 is opened and valve 44 is opened or closed. If a weaker pressure is to be sent, the valve 44 is opened and the valve 45 is opened or closed.

Further, for the safety of the eyeball 10, after a certain period of time has elapsed since the backflow switch was turned on, the valve 45 is automatically closed and the valve 44 is opened to open the eye to the atmosphere.

By the way, as the suction progresses, the amount of the suction object 34 reaches level A.
When the liquid level detector 98 detects that the level has been reached, the suction is forcibly stopped and the suction stopped state is displayed on that line.

Note that the pressure detection section is also used to adjust the pressure in the storage section to a predetermined pressure during suction.

The pressure adjustment section is not limited to adjusting only the pressure, but may also adjust the time for applying pressure. Also, both pressure and time may be adjusted.

Example 2 Please refer to FIG. Embodiment 2 in FIG. 2 illustrates differences from Embodiment 1 in FIG. 1.

The pressure adjustment unit 131 of the second embodiment includes a tank 132 that stores compressed air, a valve 137 that opens and closes sending compressed air from the compression pump 31 to the tank 132, a valve 144 that opens and closes the tank to the atmosphere, and a valve 144 that opens and closes the tank to the atmosphere. It consists of a pressure sensor 135 that detects pressure, and a valve 133 that opens and closes sending compressed air in the tank 132 to the suction passage 40.

Valve 133 is closed during suction. On the other hand, in response to the signal from the pressure sensor 135, the valves 144 and 137 are operated so that the pressure in the tank 132 becomes positive enough to instantly eliminate the residual pressure in the suction passage 40.

For example, if the signal from the pressure detection section 50 is X, the pressure B in the tank 132 is determined accordingly. The valves 144 and 137 are controlled so that the pressure B is achieved. That is, when the pressure sensor 135 detects that the pressure becomes B, the valves 144 and 137 are closed. Also, pressure sensor 1
35 is lower than B, valve 137 is opened and valve 144 is closed.

If it is detected that the temperature is higher than B, the valve 144 is opened and the valve 137 is closed. In this way, the pressure sensor 135 is used as a pressure monitor within the tank 132.

When stopping suction, open valve 133 and close valve 144.13.
7 is closed, and the regulated air in the tank 132 is sent to the suction passage 40 to instantly eliminate residual pressure. For this reason tank 1
The capacity of 32 is set in advance to be larger than the capacity of suction passage 132.

At the time of backflow, valve 133 is opened, valve 137 is opened, and valve 144 is closed to allow backflow. Further, when a pressure weaker than that pressure is generated, the valve 137 is opened and the valve 144 is opened or closed. Furthermore, when a weaker pressure is to be applied, the valve 144 is opened and the valve 137 is opened or closed. That's how you regurgitate it. The other parts operate in the same manner as the first embodiment shown in FIG.

The invention is not limited to the embodiments described above.

The device that produces compressed air is not limited to a compression pump, but may also be a gas cylinder. Instead of the valve 45, it may be opened and closed by crushing the tube 41 using a motor or the like, such as a vacuum pressure adjustment section.

Instead of a vacuum pump, the vacuum may be created using a device that converts air from a gas cylinder or a compression pump into vacuum.

Instead of a rack and pinion, a piston or crank may be used. It doesn't have to be a motor, it can be a solenoid.

The vacuum pressure adjustment section may not only collapse the atmosphere release tube, but also change the inner diameter of the tube.

The valve of the pressure adjustment section does not have to be a valve, and may be a flexible tube 41 that is opened or closed by pushing it with a solenoid or the like.

A device that changes the flow rate or pressure from the compression pump may be added between the compression pump and the pressure adjustment section.

In the pressure adjustment section, the valve may not only be used to turn on/off, but may also be used to change the flow rate.

As described above, the residual pressure when suction is stopped can be immediately eliminated. Furthermore, the object to be aspirated can be easily caused to flow backwards as needed during surgery. Therefore, surgery can be performed safely and efficiently.

[Brief explanation of drawings]

FIG. 1 is a diagram showing Embodiment 1 of the suction device of the present invention, and FIG.
The figure shows a second embodiment of the suction device of the present invention. 10...Eyeball 20...Cutter 30...Pressure adjustment section 31...Compression pump 40 ...... Suction passage 50 ...... Pressure detection section 60 ...... Decompression adjustment section 0 ...... Accommodation section 0 ...... Passage opening/closing section 0 ... Vacuum pressure adjustment section 5 ...... Atmospheric release tube 35

Claims (1)

[Scope of Claims] A suction port for suctioning an object to be aspirated, a storage section for accommodating the object to be aspirated, a passageway for guiding the object to be aspirated from the suction port to the storage section, and a suction port for suctioning the object to be aspirated. a pressure-reducing adjustment part that reduces the pressure inside the housing part, a pressure detection part that detects the pressure inside the housing part, a pressurization part connected to the suction passage, and a pressure adjustment part that adjusts the pressure of the pressurization part. A suction device comprising: a passage opening/closing part that is provided between a connecting part of a passage to which a pressurizing part is connected and an accommodating part, and opens and closes passage of an object to be sucked in the passage.