JP2877210B2 - Pressure adjustable suction device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a pressure-adjustable suction device used for ophthalmic surgery and the like.

2. Description of the Related Art A suction device for ophthalmic surgery is used, for example, to suction a turbid portion of a vitreous body in an eyeball. This device has, for example, one bottle. The bottle has two passages. One passage leads to a vacuum pump.
Other passages are open to the atmosphere. By operating a vacuum pump to control the opening and closing of these two passages, the pressure in the bottle is arbitrarily adjusted. Then, the turbid portion of the vitreous body is sucked into the bottle by the negative pressure in the bottle.

Problems to be Solved by the Invention However, since it is necessary to control the opening and closing of the two passages as described above, the control device becomes complicated.

OBJECTS OF THE INVENTION It is an object of the invention to provide a pressure-adjustable suction device which can be controlled in a simple manner to obtain any pressure.

SUMMARY OF THE INVENTION A suction port for sucking an object to be suctioned, a storage section for storing the suctioned object sucked by the suction port, a passage for guiding the suctioned object from the suction port to the storage section, and depressurizing the storage section A decompression unit, a pressure detection unit that detects the pressure of the storage unit, an air release unit that opens the storage unit to the atmosphere, and a predetermined pressure in the storage unit by adjusting the degree of vacuum from the pressure reduction unit based on the pressure detected by the pressure detection unit. And a pressure adjusting unit.

Means for Solving the Problems The suction port 15 suctions the object to be suctioned 34.

The accommodating section 70 accommodates the suctioned object 34 sucked by the suction port 15.

The suction passage 40 guides the suctioned object 34 from the suction port 15 to the storage unit 70.

 The vacuum pump 65 as a pressure reducing unit reduces the pressure in the storage unit 70.

 The pressure detection unit 50 detects the pressure of the storage unit 70.

 The atmosphere opening section 60 opens the storage section 70 to the atmosphere.

The pressure adjustment unit 30 adjusts the degree of vacuum from the vacuum pump 65 based on the pressure detected by the pressure detection unit 50, and sets the accommodation unit 70 to a predetermined pressure.

The pressure in the storage unit 70 is adjusted by the atmosphere release unit 60 and the pressure adjustment unit 30.

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

In ophthalmic surgery, the aspirated object 34, which is a turbid portion of the gel-like vitreous between the lens a and the retina b of the eyeball 10, is removed by suction, and replaced with a transparent liquid instead. This allows light to pass through the crystalline lens a and reach the retina b to restore visual acuity.

The suction device includes a cutter 20, a pressure adjusting unit 30, and a suction passage 4.
0, a pressure detecting section 50, an atmosphere opening section 60, a vacuum pump 65 as a pressure reducing section, a housing section 70, and a liquid level detecting section 80.

[Cutter 20] The cutter 20 cuts off the object to be sucked 34, which is a cloudy vitreous body in the eyeball 10, and sucks the object through the suction port 15.

[Suction passage 40] The suction passage 40 communicates the suction port 15 of the cutter 20 with the storage unit 70, and guides the sucked object 34 to the storage unit 70.

[Pressure Adjusting Unit 30] The pressure adjusting unit 30 opens and closes a passage 66 in the vacuum pump 65. The passage 66 is a flexible passage and can be opened and closed by crushing.

The pinion 68 of the motor 67 meshes with the rack 69.
When the motor 67 operates, the presser 69a of the rack 69 and the stopper 90
The gap becomes small, and the passage 66 is closed.

[Pressure Detecting Section 50] The pressure detecting section 50 detects the pressure in the housing section 70.

[Air release unit 60] The air release unit 60 connects the inside of the storage unit 70 and the atmosphere.

[Accommodating Unit 70] The accommodating unit 70 accommodates the suction target 34 in the eyeball 10. Accommodation
The 70 is provided with a liquid level detector 80. The liquid level detector 80 detects when the level of the object 34 becomes A and prevents overflow.

[Depressurizing Unit] The vacuum pump 65 serving as a depressurizing unit depressurizes the inside of the storage unit 70 via the passage 66.

[Operation] When the power is turned on, the vacuum pump 65 moves, and the pressure adjustment unit
The motor 67 moves in the direction that the presser 69a of 30 crushes the passage 66,
Stop passage 66. Then, since the inside of the storage unit 70 is opened to the atmosphere by the atmosphere opening unit 60, the pressure becomes the atmospheric pressure.

When a signal including suction is sent by a foot switch or the like, the motor 67 of the pressure adjusting unit moves in a direction to open the passage 66, and opens the passage 66 to evacuate the housing unit 70. Then, the object to be sucked 34 in the eyeball 10 is sucked into the housing part 70 from the suction port 15 via the suction passage 40.

When the pressure detection unit 50 detects that the pressure in the storage unit during suction has reached a predetermined pressure, the motor 67 of the pressure adjustment unit 30 stops,
The diameter of the passage 66 is kept in that state.

When the pressure detection unit 50 detects that the balance between the vacuum flow rate that enters the storage unit 70 from the passage 66 and the flow rate of the atmosphere from the atmosphere release unit 60 is higher than the predetermined pressure, the motor 67 of the pressure adjustment unit 30 turns the passage 66 Is rotated in a direction in which the presser 69a can be opened.

Conversely, when the pressure falls below the predetermined pressure,
When 50 is detected, the motor 67 of the pressure adjusting unit 30 passes through the passage 66,
The presser 69a rotates in the closing direction.

As described above, the pressure detection unit 50 functions as a pressure monitor in the storage unit 70.

The pressure regulator 30 acts to vary the amount of negative pressure sent from the vacuum pump 65 to the container 70.

As described above, the atmosphere opening unit 60 acts to release the pressure in the storage unit 70 to the atmosphere, and to increase or decrease the pressure in the storage unit 70 or to set the pressure to the atmospheric pressure.

When a foot switch or the like is released to stop suction, the pressure adjusting unit 30 stops the passage 66.

Further, when the suction proceeds for the first time and the liquid level detector 80 detects that the amount of the suctioned object 34 has reached the level A,
The suction is forcibly stopped and a message to that effect is displayed.

Embodiment 2 Referring to FIG.

In the pressure adjusting unit 130, the passage 166 is opened and closed between the piston 167 and the stopper 190. Spiton 167 cranks
When the motor 169 is rotated by the motor 169, it moves up and down. By this vertical movement, the passage 166 is pressed or released by the piston 167.

Embodiment 3 Referring to FIG. 3 and FIG.

A blocking member 260 is attached to the solenoid 250.
When the blocking member 260 moves up and down, the blocking member 260 enters the hole 200 to open and close the passage 266.

 The invention is not limited to the embodiments described above.

The passages 66, 166, and 266 may not be all flexible but may be flexible only at the portion where the tube is crushed.

The device for creating a negative pressure may use not only a vacuum pump but also a device for creating a vacuum from compressed air.

 The atmosphere opening part may be a tube.

A solenoid or the like can be used instead of the motor of the pressure adjusting unit.

According to the present invention, if only the degree of pressure reduction from the pressure reducing unit is adjusted by the pressure adjusting unit, the pressure in the storage unit can be easily adjusted. Therefore, the structure can be simplified and the size can be reduced.

[Brief description of the drawings]

FIG. 1 is a view showing a first embodiment of a suction device of the present invention, and FIG.
FIG. 4 to FIG. 4 are diagrams showing Embodiments 2 and 3. 15 Suction port 30 Pressure adjustment unit 35 Suction target 40 Suction passage 50 Pressure detection unit 60 Atmosphere release unit 65 Vacuum pump 70 Storage unit

Claims (2)

(57) [Claims] A suction port for sucking an object to be sucked, a housing section for housing the object to be sucked sucked by the suction port, a passage for guiding the object to be suctioned from the suction port to the housing section; A decompression unit for reducing the pressure, a pressure detection unit for detecting the pressure of the storage unit, an air release unit for opening the storage unit to the atmosphere, and a degree of vacuum from the decompression unit based on the pressure detected by the pressure detection unit to adjust the inside of the storage unit. A pressure-adjustable suction device, comprising: a pressure adjustment unit that sets a predetermined pressure. 2. The pressure-adjustable suction device according to claim 1, wherein the pressure adjusting section has a configuration in which a diameter of a passage connecting the pressure reducing section and the housing section is variable.