JP2750696B2 - Pressure adjustable suction device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure-adjustable suction device used for ophthalmic surgery such as vitreous or cataract.

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.

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 The object of the invention is to provide a pressure-adjustable suction device which can be controlled in a simple manner to obtain any pressure.

SUMMARY OF THE INVENTION The invention is summarized in the claims.

Means for Solving the Problems Referring to FIG. 2 and FIG.

 The suction unit 30 suctions the suctioned object 34.

The storage section 100 stores the object to be sucked 34 sucked by the suction section 30.

The decompression unit 130 constantly decompresses the housing unit 100 at a constant vacuum.

 The pressure detection unit 111 detects the pressure in the storage unit 100.

The pressure adjusting section 90 connects the housing section 100 and the atmosphere via an opening 96 having a variable size.

The pressure control unit 180 adjusts the size of the opening 96 of the pressure adjustment unit 90 based on the pressure detected by the pressure detection unit 111, and sets the inside of the storage unit 100 to a predetermined pressure.

By changing the size of the opening 96, the atmosphere is connected to the inside of the storage unit 100, and the pressure in the storage unit 100 is adjusted.

Embodiment 1 FIG. 1 shows a preferred embodiment of the suction device of the present invention. The suction device 1 of the present invention is provided in a vitreous surgery device as an example.

In vitreous surgery, for example, a turbid portion (hereinafter, referred to as an object to be aspirated) of the gel-like vitreous body 14 between the crystalline lens a and the retina b is removed by suction and replaced with a transparent liquid. This allows light to pass through the crystalline lens a and reach the retina b, thereby achieving visual acuity recovery.

FIG. 1 shows a suction device 1, a cutter driving unit 2,
A light source unit 3, a perfusion bottle 4, a cutter 5 with a suction function, a light guide 6, and a perfusion plug 7 are shown.

The cutter 5 has an insertion portion 5a. The insertion portion 5a is inserted into the eyeball 13 through the sclera 15 of the eyeball 13. A suction port 30 is provided at the tip of the insertion section 5a. The cutter 5 can cut off the suction object 34 entering the suction port 30. The cut object 34 can be sucked into the suction device 1 through the insertion portion 5a and the first passage 8.

The cutter driving unit 2 includes a tube 9 for compressed air.
Is connected. The compressed air is sent to the cutter 5 via the tube 9, and the cutter 5 is operated by the compressed air to cut off the suctioned object 34. The light source unit 3 can send light to the light guide 6 via the optical fiber 11. The tip of the light guide 6 is an eyeball
Inserted into 13. The light guide 6 can shine light near the suction port 30.

The perfusion bottle 4 contains a perfusion solution. The perfusate is supplied to the eyeball 13 via the perfusion tube 12 and the perfusion plug 7.
It can be sent inside. This perfusate is intended to replenish the inside of the eyeball 13 and recover intraocular pressure after excision and aspiration of the object 34 to be aspirated.

[Suction Device 1] Next, the suction device 1 will be described in detail with reference to FIGS.

The suction device 1 shown in FIG. 2 is a device for suctioning an object to be suctioned 34 in the eyeball 13 by negative pressure.

[Accommodation Unit 100] The suction device 1 has a bottle-shaped accommodation unit 100. The accommodating section 100 accommodates the suctioned object 34.

The suction port 30 of the cutter 5 communicates with the first passage 8,
The first passage 8 reaches the inside through the upper lid of the first storage portion 100.

The first storage section 100 has a storage state detector 112 such as a liquid level detector. The storage state detector 112 can detect when the liquid level of the suction target 34 reaches the position A.

[Depressurizing Unit 130] The depressurizing unit 130 is for always depressurizing the inside of the storage unit 100 at a constant vacuum degree. The pressure reducing unit 130 has a vacuum pump 135 and a passage 136. The vacuum pump 135 is connected to the accommodation section 100 via a passage 136.

[Pressure Detection Unit 111] The pressure detection unit 111 is a pressure sensor. Pressure detector 111
Detects the internal pressure of the storage unit 100.

[Pressure adjusting unit 90] The pressure adjusting unit 90 includes a flexible pipe 91, a pressing member 92,
It has a rack 93, a pinion 94 and a motor 95.

The tube 91 is made of an elastically deformable material such as rubber, for example. The tube body 91 is provided on the upper part of the housing part 100. The tube 91 has an opening 96 for air suction. The pinion 94 is attached to the output shaft of the motor 95. The pinion 94 is engaged with the rack 93. A pushing member 92 is fixed to the rack 93. By driving the motor 95, the pushing member 92 is moved in the direction of the arrow X to change the size of the opening 96 of the tube body 91.

As shown in FIG. 3, the pressure control unit 180
And the signal of the storage state detector 112 and the signal of the foot switch 160 are received. The pressure control unit 180 includes the pressure detection unit 11
The size of the opening 96 is adjusted by rotating the motor 95 based on the signal of (1). Thereby, the pressure in the storage section 100 is adjusted to the set pressure. The vacuum pump 135 is connected to the pressure control unit 180.

Operation Referring to FIGS. 2 and 3. FIG.

When the foot switch 160 is turned on, the vacuum pump 135 operates, and the pressure inside the storage unit 100 becomes negative. The suctioned object 34 is guided into the storage section 100 through the suction port 30 and the passage 8.

On the other hand, the pressure detection unit 111 constantly detects the pressure in the storage unit 100 and continuously sends a signal to the pressure control unit 180.

If the pressure in the storage unit 100 is different from the set pressure, the pressure control unit 180 sends a control signal to the motor 95 to correct the difference. The motor 95 moves the pushing member 92 according to the signal,
By changing the diameter of the hole 96 of the tubular body 91, the amount of air sucked into the storage section 100 is changed.

By doing so, the pressure in the storage section 100 is always maintained at the set pressure.

During the suction of the suction target 34, if the suction target 34 is stored in the storage unit 100 in a larger amount than the set amount, the storage state detector 112 detects this. The pressure control unit 180
The alarm is issued or the vacuum pump 135 is stopped so that the container 100 does not overflow.

As a modification of the first embodiment, the tube body 91 may be not only at the upper portion of the housing portion 100 but also at the side or below. The rack (93) and the pinion (94) are used for the pressure adjusting section 90, but a crank mechanism or the like may be adopted.

Embodiment 2 The pressure adjusting section 190 shown in FIGS. 4 and 5 presses the side surface 99b of a sphere, a cylinder, or a columnar member 99 with a pressing member 92.

In FIG. 4, the member 99 closes the opening 196 of the receiving section 100. The opposite portion 99a of the member 99 is attached in close contact with the housing portion 100.

In FIG. 5, the member 99 is forcibly pushed by the pushing member 92. For this reason, the air enters the storage section 100 through the opening 196.

As the member 99, any material can be selected as long as it is made of a deformable material. For example, water bags, air bags, rubber and the like.

Embodiment 3 FIG. 6 shows the accommodation section 100 viewed from above. Member 199 is open
Move to change 196 cross section. The member 199 in FIG.
Although it is square, it may be round or square.

Embodiment 4 An opening 296 is formed in the storage section 100 shown in FIG. The opening 296 has a tapered portion 296a and a small diameter portion 296b. Member 2
99 is a shape suitable for the tapered portion 296a. By controlling how the member 299 contacts and separates from the tapered portion 296a, the amount of air flowing into the opening 296 can be varied.

However, the shapes of the opening 296 and the member 299 are not limited to the embodiment of FIG.

Fifth Embodiment FIG. 8 shows the accommodation section 100 viewed from above. A number of small openings 396 are formed in the housing 100. These openings 39
6 is arranged in a triangular range. The plate-shaped member 399 can close each opening 396. The arrangement of the opening 396 is 3
It is not limited to a square.

Embodiment 6 The opening 496 of the member 499 in FIG.
6b. In other words, there is a large diameter part 496a on the atmosphere side,
Inside the accommodating part 100, there is a small diameter part 496b. The member 499 may be pushed by the pushing member 493a. Alternatively, the small-diameter portion may be on the atmosphere side and the large-diameter portion may be on the housing portion side, and the large-diameter portion may be pushed by a pushing member.

The driving force 191 of the pressure adjusting unit 190 in FIG. 4, the driving force 291 of the pressure adjusting unit 290 in FIG. 6, and the driving unit 3 of the pressure adjusting unit 390 in FIG.
The driving force 491 of the pressure adjusting unit 490 in FIG. 8 and the driving unit 591 of the pressure adjusting unit 590 in FIG. 9 can use the mechanism shown in FIG. 2 or the like.

As still another embodiment, for example, a tube may be provided to protrude from the housing portion, and the tube may be provided with any of the pressure adjusting portions shown in FIGS.

Further, the width of the air passage may be varied by bending a pipe or the like.

Further, any one of the pressure adjusting portions in FIGS. 4 to 9 may be provided as a valve in the passage 136 in FIG.

Example 7 Reference is made to FIG.

The suction device 501 is a device that suctions the suction object 34 in the eyeball 13 by negative pressure.

[Accommodating Units 600 and 601] The suction device 501 includes first and second accommodating units 600 and 601 in a bottle shape. Each of the storage sections 600 and 601 stores the object 34 to be sucked. The volumes of the first and second storage portions 600 and 601 are substantially the same.

The suction port 30 of the cutter 5 communicates with the first passage 508, and the first passage 508 reaches the inside through the upper lid of the first storage section 600. A first valve 509 is provided in the first passage 508.

The second passage 588 exits from the bottom lid of the first storage section 600 and reaches the inside of the second storage section 601 through the upper lid of the second storage section 601.
A second valve 710 is provided in the second passage 588. Second storage section
A third passage 788 exits from the upper lid of 601 and reaches the vacuum pump 635. A third valve 720 is provided in the third passage 788.

The first storage section 600 includes a first storage state detector 612 such as a liquid level detector. This detector 612 detects the level of the
It can detect when it comes to the position of A1.

The second storage unit 601 includes a second storage state detector 622. The detection unit 622 can detect when the liquid level of the suction target 34 reaches B1.

The fourth passage 888 connects the vacuum pump 635 and the first storage section 600.

[Decompression unit 630] The decompression unit 630 always decompresses the inside of the first storage unit 600 at a constant degree of vacuum, and also depressurizes the inside of the second storage unit 601 as necessary. Decompression section 6
30 has a vacuum pump 635, a third valve 720, a third passage 788, and a fourth passage 888.

[Pressure Detection Unit 611] The pressure detection unit 611 is a pressure sensor. Pressure detector 611
Detects the internal pressure of the first storage section 600.

[Pressure Adjusting Unit 590] The pressure adjusting unit 590 has a cylindrical portion 594, a member 591 and a drive source (not shown). The cylindrical portion 594 protrudes from the upper lid of the first storage portion 600. The member 591 operates the drive source to adjust the size of the opening 596 to adjust the amount of air to be sucked into the opening 596.

The signal of the pressure detecting unit 611, the signal of the operation unit 660 such as a foot switch, and the signals of the first and second housing state detectors 612 and 622 are input to the pressure control unit 680 in FIG.

The pressure control unit 680 enables the size of the opening 596 of the pressure adjustment unit 590 to be adjusted based on the signal of the pressure detection unit 611. The pressure control unit 680 includes a vacuum pump 635 and first to third valves 509,710,72.
An operation signal of 0 is given. Note that the vacuum pump 635 and the operation unit 660 are connected to a power supply 645.

Operation Refer to FIG. 10 and FIG.

When the power supply 645 is turned on, the vacuum pump 635 operates. The first valve 600 is evacuated from the fourth passage 888 in FIG.
509 is closed, the second valve 710 is closed, the third valve 720 is open, and the member 591 of the pressure adjusting unit 590 is completely open.

When the foot switch of the operation unit 660 is turned ON, suction starts, the first valve 509 is opened, the second valve 710 is closed, and the third valve 720 is closed. The opening of the pressure adjustment unit 590 is detected while the pressure in the first storage unit 600 is detected by the pressure detection unit 611 so that the pressure becomes a pressure (predetermined pressure) indicated by the foot switch of the operation unit 660.
Change the size of 596. Then, from the suction port 30 to the first passage 5
The object to be sucked 34 is accommodated in the first accommodation part 600 through 08.

If the foot switch is turned off (suction stop) before the suction target 34 reaches the level A1 of the first storage section 600,
The first valve 509 is closed, the second valve 710 is open, and the third valve 72
0 is open, and the opening 596 of the pressure adjusting section 590 is completely open.

The object to be sucked 34 is moved from the first storage section 600 to the second storage section 601.

If the foot switch is turned on during the transfer, the suction starts again and the above operation is repeated.

Further, when the suction proceeds and the suction target reaches the level A1 in the first storage section 600, the first valve 509 is forcibly closed, the second valve 710 is opened, and the third valve 720 is opened for a set time. ,
The opening 596 of the pressure adjusting section 590 is completely opened and the first accommodation section 60 is opened.
The object to be sucked 34 in 0 is moved to the second storage section 601.

After the set time, the suction operation can be performed by turning on the foot switch. Suction further advances and object to be sucked 34
The second valve 710 is forcibly closed and the third valve 720 is closed when the pressure reaches the level B1 in the second storage section 601.

The suction is performed for a long time and the object to be suctioned is
When the first level and the B1 level of the second storage section 601 have been respectively reached, the first valve 509 is forcibly closed, the second valve 710 is closed,
The third valve 720 is closed, the opening 596 of the pressure adjusting unit 590 is completely opened, and the suction is stopped.

Instead of providing the set time in the seventh embodiment, the suction operation may be performed again when the liquid level of the suction target 34 falls to a predetermined height.

Embodiment 8 Referring to FIG.

The suction device 1001 is a device that suctions the suction target 34 in the eyeball 13 by negative pressure.

[Storage Units 1100, 1102] The suction device 1001 is a bottle-shaped first and second storage units 1100, 110.
With 2. Each of the storage sections 1100 and 1102 stores the suctioned object 34. The second storage portion 1102 has a larger capacity than the first storage portion 1100.

The suction port 30 of the cutter 5 communicates with the first passage 1008, and the first passage 1008 reaches the inside through the upper lid of the first storage portion 1100. In the middle of the first passage 1008, the valve 10
There is 09.

The second passage 1088 extends from the lower lid of the first storage section 1100 to the inside of the second storage section 1102 through the upper lid. In the middle of the second passage 1088, there is a squeezing roller device 1200. The roller device 1200 has a motor 1201 and a roller 1202.
Rollers are commonly used.

A third passage 1188 extends from the upper lid of the first storage section 1100 and is connected to a vacuum pump 1135.

The first storage section 1100 includes a first storage state detector 1112 such as a liquid level detector. The detector 1112 can detect when the liquid level of the suction target 34 reaches the position A2.

The second storage section 1102 has a second storage state detector 1122.
The detection unit 1122 can detect when the liquid level of the suction target 34 reaches B2.

A hole 1192 that communicates with the atmosphere is formed in the second storage portion 1102.

[Depressurizing Unit 1130] The depressurizing unit 1130 is for always depressurizing the inside of the first storage unit 1100 with a constant degree of vacuum. The decompression unit 1130 is a vacuum pump
1135 and a third passage 1188.

[Pressure Detection Unit 1111] The pressure detection unit 1111 is a pressure sensor. Pressure detector 1111
Detects the internal pressure of the first storage section 1100.

[Pressure Adjusting Unit 1090] The pressure adjusting unit 1090 includes a hole 1096 of the first housing 1100 and a member 1099 made of an elastic material. The member 1099 has a tapered portion 1099a. The tapered portion 1099a adjusts the size of the opening 1096. The member 1099 can be moved up and down by the mechanism unit 1091.

The pressure control unit 1180 shown in FIG.
Signals of the operation unit 1160 such as a foot switch and the first and second signals
The signals of the housing state detectors 1112 and 1122 are input.

The pressure control unit 1180, based on the signal of the pressure detection unit 1111,
The size of the opening 1096 of the pressure adjusting unit 1090 can be adjusted by operating the mechanism unit 1091. The pressure control unit 1180 can also supply operation signals to the vacuum pump 1135, the valve 1009, and the motor 1201.

A power supply 1145 is connected to the vacuum pump 1135, the operation unit 1160, and the motor 1201.

Operation The vacuum pump 1135 operates when the power is turned on. The inside of the first accommodating section 1100 is evacuated from the third passage 1188 by vacuum, the valve 1009 is closed, the opening 1096 of the pressure adjusting section 1090 is completely opened, and the roller 1202 is connected to the motor 12.
Rotate by 01.

The inside of the first storage section 1100 is at atmospheric pressure. When the foot switch of the operation unit 1160 is turned on, suction starts. The size of the opening 1096 of the pressure adjusting unit 1090 is changed while detecting the inside of the first housing unit 1100 by the pressure detecting unit 1111 so that the valve 1009 is opened and the pressure indicated by the foot switch (predetermined pressure) is reached.

The object to be sucked 34 is housed in the first housing 1100 from the suction port 30 through the first passage 1008. At the same time, since the squeezing roller 1202 is rotating, the suction target 34 is
It is moved from the first storage section 1100 to the second storage section 1102 through 88. When the foot switch is turned off here, the valve 1009
Is closed, the opening 1096 is completely opened, and the suction is stopped.

During the suction, the object to be sucked 34 is squeezed by the squeezing roller 1202 and transferred from the first storage unit 1100 to the second storage unit 1102.
The amount of squeezing is determined in advance so that the time when 34 is stored in the first storage unit 1100 is not shortened.

The liquid level of the first storage unit 1100 is level A2 due to a device failure or the like.
Is reached, the first storage state detector 1112 is turned on, the valve 1009 is forcibly closed, the opening 1096 is fully opened, the motor 1201 for rotating the squeezing roller 1202 stops, suction stops, and an alarm is issued.

In addition, during suction, the object to be sucked 34 in the second storage portion 1102 is level B2.
, The second storage state detector 1122 is turned ON, the valve 1009 is forcibly closed, the opening 1096 is completely opened, the motor 1201 for rotating the squeezing roller 1202 is stopped, and suction is stopped.

The pressure fluctuation in the first storage unit 1100 due to the squeezing roller can be removed by the pressure adjustment unit 1090.

The squeezing roller motor 1201 may be turned on and off in conjunction with the foot switch, or the number of revolutions may be changed in conjunction with the pressure indicated by the foot switch.

Effects of the Invention As described above, according to the present invention, it is possible to easily adjust the pressure in the storage section simply by controlling the size of the opening of the pressure adjustment section. Therefore, the structure can be simplified and the size can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing a suction device and other devices of the present invention,
FIG. 2 is a view showing Embodiment 1 of the suction device of the present invention, and FIG.
FIGS. 4 to 9 show the second to sixth embodiments, FIG. 10 shows the seventh embodiment, and FIG. 11 shows the control system of the seventh embodiment. , FIG. 12 is a diagram showing an eighth embodiment, and FIG. 13 is a diagram showing a control system of the eighth embodiment. 30 suction unit 34 object to be sucked 90 pressure adjustment unit 100 accommodation unit 111 pressure detection unit 130 pressure reduction unit 180 pressure control unit

Claims (1)

(57) [Claims] 1. A suction unit for sucking an object to be sucked, a housing unit for housing the object sucked by the suction unit, a decompression unit for constantly reducing the pressure of the housing unit at a constant degree of vacuum, and the storage unit A pressure detection unit that detects the pressure of the pressure, a pressure adjustment unit that connects the housing unit and the atmosphere via a variable-size opening, and a size of the opening of the pressure adjustment unit based on the detection pressure of the pressure detection unit. And a pressure control unit that adjusts the pressure and sets the storage unit to a predetermined pressure.