JPH07442A - Suction and sending-back device for cataract operation - Google Patents

Abstract

PURPOSE:To provide a water passing vent type suction and sending-back device for cataract operation forming no waveform due to a sudden atmospheric pressure change by adding a sending-back function to the suction device in order to enhance the response of the balance recover of a liquid flow system. CONSTITUTION:In a suction device for cataract operation having such a structure that the perfusion 11 supplied from a perfusion bottle 1 is injected in the anterior sac from a perfusion supply line 3 by a handpiece 4 having an ultrasonic chip and perfusion injection and suction ports provided to the leading end thereof and broken pieces after operation are discharged from a suction port by operating the suction pump provided to the leading end of the handpiece 4 and equipped with a vent valve 71 for releasing suction pressure, the device for returning the suction pressure to atmospheric pressure has such a structure that a suction and sending-back device 7 is provided to the suction pump and consists of a footswitch and a reversible peristaltic pump 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction control device for cataract surgery, and in particular, as a means for returning the suction pressure to atmospheric pressure, a suction control provided with a backflow mechanism for reversing suction. Regarding the device.

[0002]

2. Description of the Related Art During cataract surgery, a surgical method is adopted in which the lens of the affected area is crushed and separated by ultrasonic vibration while injecting perfusion, and the crushed fragments and peeled pieces are suctioned and removed from the body together with the perfusate. ing. The surgical handpiece is equipped with an ultrasonic tip at its tip, and crushes and separates the crystalline lens at the tip, while injecting perfusion and aspirating the crushed small pieces and liquid to the outside of the body. The ultrasonic tip tip consists of a tube body inside which a thin tube for suction is provided, and an outer peripheral tube for injecting a perfusate is provided around the tube body in the gap between the ultrasonic tip and the covering sleeve. .

Cataract surgery is performed while injecting a perfusate into the anterior capsule, which is the affected area. The perfusate is usually supplied from the perfusion bottle located at the upper part through the perfusion drive valve, the perfusion line of the tubing set, the ultrasonic tip attached to the tip of the handpiece, and the covering sleeve covering the outer periphery of the tip. It is injected into the anterior capsule through the gap. The perfusate is usually perfused into the eye from a perfusion bottle set at a position higher than the position of the patient's eye by utilizing the height difference.
The perfusion pressure is adjusted by raising and lowering the perfusion bottle.

Small pieces of the affected part of the lens, which have been crushed or peeled off by ultrasonic vibration, liquid, etc., pass through the internal thin tube of the ultrasonic tip attached to the tip of the handpiece while being mixed with perfusion, etc., and then through the suction line of the tubing set. After that, it is sucked out of the body and transferred to a drainage bag.

[0005] During surgery, there are cases where it is desired to continuously aspirate the fragments and liquid of the lens that have been fragmented and detached to remove them outside the body, and where there is a case where suction is temporarily interrupted immediately. When the suction is interrupted, it goes without saying that the suction pump is turned off, but there is a problem in that the suction state cannot be immediately restored to the original state. In order to instantly restore from the suction state to the original state without suction, two methods are adopted as a structure that cancels the suction pressure: an air vent that uses the atmosphere and a water and water flow vent that uses perfusion. There is.

In the air vent system, when the suction state is interrupted, the suction pump is turned off, and at the same time, the atmosphere is introduced into the suction port side to introduce the atmosphere that cancels the negative pressure of the suction pump, and the whole atmosphere is pressurized. This is a method of returning the inside of the eye to the state before suction. Since the atmosphere enters the suction passage, some residual air will be sucked when the suction is started again, but since it is unrelated to the surgery, no problem occurs.

On the other hand, the water flow vent method is a method of canceling the negative pressure of the suction pump by turning off the suction pump and simultaneously introducing perfusion from the suction side when the suction state is interrupted. is there. When the peristaltic pump for suction is stopped, the pinch valve for water supply for perfusion is momentarily opened, the perfusion is supplied to the suction line, and the negative pressure in the suction line becomes atmospheric pressure. At this time, since a part of the perfusate instantaneously flows backward through the suction line, the lens substance and its fragments adsorbed to the tip of the tip under negative pressure lose the negative pressure and are released from the tip of the tip.

[0008]

When the liquid flow system loses its balance between the perfusion into the eye and the suction from the eye during the suction, the suction is immediately stopped as a load on the liquid flow system. There is an urgent need to restore the balance. However, in the conventional method, neither the water flow vent nor the air vent is necessarily sufficient in the reaction speed (response) of its operation, and therefore it is often seen that the eye is damaged. In order to overcome such drawbacks and improve the response of the balance recovery of the liquid flow system, this system reverses the suction operation to obtain a quick balance recovery.

SUMMARY OF THE INVENTION An object of the present invention is to provide a suction venting and feeding device for cataract surgery of the water venting type which does not generate a wave due to a sudden change in atmospheric pressure by using a backflow device.
Another object of the present invention is to provide a suction / backflow control device of a water venting type that does not generate a wave due to a sudden change in atmospheric pressure by adopting a structure that can apply negative pressure and pressurization corresponding to the amount of foot switch depression.

[0010]

The structure of the present invention for achieving the above object is a handpiece equipped with an ultrasonic tip, a perfusion inlet and a suction port at the tip, and is supplied from a perfusion bottle. Perfusion is injected from the perfusion supply line into the anterior chamber through the perfusion drive valve, and the postoperative debris is discharged from the suction port by operating the suction pump at the tip of the handpiece, and the suction pressure is released. A suction device for cataract surgery equipped with a vent valve, characterized in that the device for returning the suction pressure to atmospheric pressure has a structure in which a suction pump is equipped with a reverse device for suction instead of introducing air. I am trying.

The structure of the suction / backfeed device of the present invention is characterized by comprising a foot switch and a reversible peristaltic pump. In addition, the suction pressure is continuously detected, and the suction / backfeed device is automatically activated so that the atmospheric pressure is always maintained. Further, the foot switch of the surgeon is controlled so that the surgeon can control the release of the negative pressure. This is a configuration that can realize suction pressure or reverse pressure corresponding to the stepping amount.

[0012]

According to the suction / feedback device for cataract surgery having the above-described structure, when the operator wants to interrupt the suction, the peristaltic pump for suction is reversely rotated to feed back the suction. As a result, the negative pressure, which is the suction pressure, can be released without causing the wavy shape, and at the same time, the peeled pieces of the lens substance adsorbed in the suction port can be removed from the suction port. Further, in another embodiment, since the negative pressure and the pressurization can be controlled by the step width of the foot switch, the negative pressure can be gradually released without creating the wavy shape.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram of a suction / backfeed device for cataract surgery, which is an embodiment of the present invention, FIG. 2 is a block diagram of a conventional perfusion suction device for cataract surgery, and FIG. Shown in.

The suction / backfeed device for cataract surgery comprises a perfusion bottle 1, a perfusion line 2, a perfusion valve 3, a handpiece 4, a suction line 5, a reversible peristaltic pump 6, and a suction / backfeed control device 7.

The perfusion bottle 1 is a bottle for storing the perfusion 11, and it is necessary to position the perfusion bottle 1 at a position higher than the handpiece 4 used by the operator in order to secure the fluid pressure. In this embodiment, the suspension is installed at a height of about 65 cm, and a state of being pressurized to 43 mmHg is created. The installation position (height) can be appropriately adjusted as necessary in relation to the position of the patient and the required water pressure.

The perfusion line 2 includes a perfusion bottle 1 and a handpiece 4.
It is a pipe that connects and. A perfusion valve 3 is provided in the middle of the perfusion line 2, and the perfusion valve is electrically opened and closed by a solenoid. Further, the switch of the perfusion valve is a foot switch that is installed at the foot of the operator.

As shown in FIG. 3, the tip of the handpiece 4 has an ultrasonic tip 41, a suction path 42 and a suction port 43 provided in the tube of the ultrasonic tip, and an ultrasonic tip and a covering sleeve 44. It is composed of an irrigation channel 45 and an irrigation water injection port 46 which are provided in the gap. The surgeon crushes the crystalline lens, vitreous body, etc. with an ultrasonic chip while injecting perfusion, rinses the crushed pieces and exfoliated pieces from the affected area by irrigation, and operates the foot switch to create a suction pump (in this example, a reversible peristaltic pump). 6
(Described later) is operated to aspirate the debris and peeled pieces, which are the remains of surgery, along with perfusion. The suction flow is transferred to an external drainage bag (not shown) through the suction line 5 which is a pipe body.

The reversible peristaltic pump 6 in this embodiment is a peristaltic pump-based fluid drive. The diaphragm is not limited to the diaphragm, and the venturi method may be used.
The reversible peristaltic pump 6 applies a suction negative pressure to the fluid, and by operating the pump, the waste liquid consisting of the crushed pieces and the perfusion is sucked from the tip suction port 43 of the handpiece 4 and transferred to the drain bag. The reversible peristaltic pump 6 of this embodiment is
In addition to the operation of applying a negative pressure to suck the negative pressure, the operation is reversed to release the negative pressure. As a method of releasing the negative pressure, it is possible to adopt a linear control structure in which the negative pressure is gradually controlled and released in accordance with the amount of depression of the foot switch of the surgeon.

In this embodiment, the suction backflow control device 7 applies a negative pressure when the foot switch is depressed, and when the depression is returned, the pump is positively rotated in the reverse direction instead of simply interrupting the supply of the negative pressure. As a result, it is a system that releases while controlling the boosting of negative pressure. That is, when the suction / backflow control device 7 is stepped on, a negative pressure is applied, and the perfusion and the crushing / peeling pieces that are the waste liquid in the anterior chamber are sucked and sucked out from the suction pipe. On the other hand, when the foot switch is depressed and the foot is raised, the pressure normally returns to atmospheric pressure at once, but in this embodiment, the reversible peristaltic pump rotates in the reverse direction, and the pressure for eliminating the negative pressure is applied in the reverse direction. As a result, the perfusion backflow valve 71 connected to the perfusion line 2 directly connected to the perfusion bottle 1 is opened, and the perfusion bottle 1 is opened.
Is supplied in the handpiece 4 direction by flowing in the direction opposite to the suction direction (rightward in FIG. 1). This allows
The waste liquid sucked into the suction line will be sent back to the anterior chamber again.

[0020]

EFFECTS OF THE INVENTION Since the suction / feedback device for cataract surgery according to the present invention is constructed as described above, it has the following effects. First, as a method of returning the negative pressure to the atmospheric pressure, the negative pressure (200 mmHg), which was applied to the perfusion, is applied to reversely send the perfusion, and the negative pressure is forced under control without suddenly returning to the atmospheric pressure. It is possible to release it, and it does not undulate to the whole perfusion or exfoliation piece until it finally converges to the same atmospheric pressure as the atmospheric pressure. Further, by adopting a structure that can apply negative pressure and pressurization corresponding to the foot pressure of the foot switch, a suction backflow control device of a water venting type that does not generate a wave due to a sudden change in atmospheric pressure can be realized.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of a suction / backfeed device for cataract surgery.

FIG. 2 is a configuration diagram showing a conventional suction device for cataract surgery.

FIG. 3 is a diagram showing a tip portion of a handpiece.

[Explanation of symbols]

 1 Perfusion bottle 11 Perfusion 2 Perfusion valve 3 Perfusion line 4 Handpiece 41 Ultrasonic tip 42 Suction channel 43 Suction port 44 Covering sleeve 45 Perfusion channel 46 Perfusion injection port 5 Suction line 6 Reversible peristaltic pump 7 Suction back-feed control device 71 Vent valve

Claims (4)

[Claims] 1. A handpiece equipped with an ultrasonic tip, a perfusion inlet and a suction port at its tip, a perfusion supply line connecting the tip of the handpiece and the perfusion bottle, a perfusion drive valve, and the tip of the handpiece. In a suction device for cataract surgery consisting of a suction line directly connected to the suction pump, a suction pump, and a vent valve that releases the suction pressure, a suction pumping device is provided in the suction pump to return the suction pressure to atmospheric pressure. Suction and backfeed device for cataract surgery characterized by 2. The suction backfeed device for cataract surgery according to claim 1, wherein the suction backfeed device comprises a foot switch and a reversible peristaltic pump. 3. The suction-backfeeding device, wherein the suction-backfeeding device is configured to continuously detect the suction pressure and automatically operate so as to always be at atmospheric pressure. 1
Suction and Backfeed Device for Cataract Surgery 4. The suction-backfeeding device for cataract surgery, wherein the suction-backfeeding device is a suction pressure or a backpressure corresponding to a stepping amount of a foot switch of an operator.