JPH10234769A - Foot switch for ophthalmic surgery and ophthalmic surgical appliance provided with it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate sensing of the switching position and make an operator able to select the switching position, by constituting an ophthalmic surgical appliance in such a manner as suppressing the operation of a stepping-on mechanism based on a detection result and a stored set position and issuing an operation signal based on the detection result and the stored set position. SOLUTION: An operator can select the most convenient switching position out of switching positions A, B, C (positions 1, 2, 3) and a plurality of operators can operate at the most suited switching positions respectively. On the other hand, a control part opens a perfusion control valve at the position 1, drives a suction pump so as to start sucking in reaching the position 2, and generates an ultrasonic vibration in a crushing hand piece in reaching the position 3. A potentiometer detects the stepping-on quantity and changes the output of the ultrasonic vibration of the crushing hand piece. The extent of the stepping-on quantity of the foot switch can thus control the operation for perfusion, suction, and ultrasonic emulsification and variably adjust the output of the ultrasonic wave.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ophthalmic surgical foot switch and an ophthalmic surgical apparatus having the same.

[0002]

2. Description of the Related Art An ophthalmic surgery foot switch is used in a perfusion suction device, an ultrasonic cataract surgery device, or the like. When performing an operation using this type of device, since a hand or the like is held with a probe, control operations of operations in each operation mode such as a perfusion mode, a perfusion / aspiration mode, a perfusion / aspiration / ultrasonic emulsification mode, and an A foot switch is used for adjusting the output of the sound wave oscillation, the suction flow rate or suction pressure of the perfusate, and the like.

For example, in an ultrasonic cataract surgery apparatus, ultrasonic vibration is amplified and transmitted to a tip attached to the tip of a probe to crush and emulsify the nucleus of the lens, and the crushed nucleus is supplied to the tip together with a perfusate supplied to the eye. Suction is removed from the provided suction port via a tube. The control operation of the operation in each operation mode and the adjustment of the output of the ultrasonic oscillation and the suction flow rate or suction pressure of the perfusate can be freely performed by adjusting the foot switch (linear control function). The switching of the foot switch for performing these operations and adjustments is generally performed in three stages. In controlling the operation of the ultrasonic cataract surgery apparatus, when the mode is set to the perfusion / aspiration / ultrasonic emulsification mode. The first stage can control perfusion, the second stage can control perfusion + suction, and the third stage can control perfusion + suction + ultrasonic emulsification. As a method of knowing the amount of depression, two methods, a method of changing the strength of a spring and a method of causing vibration, have been proposed.

[0004]

A method of changing the strength of the spring is to change the strength of the spring at the switching position of each stage, so that the weight of the foot pedal (repulsive force against the depressing force) is changed at the switching position. Since there is a change, there is an advantage that the switching position can be easily sensed, and each operation stage can be easily fixed (there is little risk of accidentally entering the next stage). However, there is a disadvantage that the switching position cannot be freely changed because the switching position is determined by the spring.

On the other hand, in the method of causing vibration, since vibration only occurs at the switching position, if the force is excessively applied or the force is reduced when stepping on, a different step from the required operation control step is performed. There is a disadvantage that erroneous operation may occur, such as entering a stage.

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks of the conventional apparatus, it is an object of the present invention to provide an ophthalmic foot switch which can easily detect a switching position and which allows an operator to select a switching position, and an ophthalmic surgical apparatus including the same. I do.

[0007]

Means for Solving the Problems To solve the above problems, the apparatus of the present invention is characterized by having the following configuration.

(1) A foot switch which is connected to an ophthalmic surgery apparatus for operating an operating eye and which gives an operation signal of the apparatus has a footrest and a stepping mechanism for stepping on the footrest. Depression position setting means for setting a depression position for issuing an operation signal, storage means for storing a position set by the depression position setting means, and detection means for detecting a depression position of the depression mechanism,
Suppression means for suppressing the operation of the stepping mechanism based on the detection result of the detection means and the set position stored in the storage means, and a detection result of the detection means and a set position stored in the storage means. Operating signal transmission means for generating an operation signal based on the operation signal.

(2) In the foot switch for ophthalmic surgery of (1), the stepping position setting means can set the stepping position to be set in a plurality of stages.

(3) In the foot switch for ophthalmic surgery according to (1), the stepping position setting means can set the stepping position to be set in a plurality of stages, and the suppressing means makes the operation of the stepping mechanism equal or the same. It is characterized in that it is controlled stepwise with different magnitudes of force.

(4) In the foot switch for ophthalmic surgery according to (1), the depression position setting means includes a pattern storage means for storing a plurality of setting patterns, and a selecting means for selecting a setting pattern. It is characterized by having.

(5) Perfusion solution supply means for supplying the perfusion solution in the perfusion bottle into the eye, suction means for aspirating the supplied perfusion solution together with waste in the eye, and intraocular use of ultrasonic vibration. And an emulsifying means for crushing and emulsifying the tissue of the ophthalmic surgery apparatus, a stepping mechanism having a footrest portion for stepping on the footrest portion, and a depressed position for setting a depressed position for generating an intended operation signal. Setting means, storage means for storing a position set by the depressed position setting means, detecting means for detecting a depressed position of the depressing mechanism, a detection result of the detecting means and a set position stored in the storage means. An operation signal transmission unit that emits an operation signal based on, and a suppression unit that suppresses operation of the stepping mechanism based on a detection result of the detection unit and a set position stored in the storage unit. Control means for controlling the operation of the suction means and / or the emulsification means based on the operation signal.

[0013]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of the apparatus.

Reference numeral 1 denotes a perfusion bottle for storing a perfusion solution such as a physiological saline solution, and the height of the perfusion bottle 1 is adjusted so that the perfusion solution is supplied to the patient's eye 2 at an appropriate speed. Reference numeral 3 denotes a perfusion tube for guiding the perfusate falling from the perfusion bottle 1 to the patient's eye.
A perfusion control valve 4 is provided in the middle of the perfusion tube 3, and the opening and closing of the perfusion control valve 4 controls the outflow of the perfusate.

The other end of the perfusion tube 3 is connected to a crushing handpiece 5A and a perfusion suction handpiece 5B. A chip having a suction port is attached to the crushing handpiece 5A, and the nucleus of the crystalline lens is crushed and emulsified with the chip by ultrasonic vibration, and the crushed nucleus is sucked together with the perfusate. The output of the ultrasonic oscillator disposed inside the crushing handpiece 5A is adjusted by the control of the control unit 8.

The perfusion suction handpiece 5B has a tip having a suction port, and suctions the cortex and the like remaining after the removal of the lens nucleus together with the perfusion liquid. The crushing handpiece 5A and the perfusion suction handpiece 5B are selected depending on the operation stage, the operation method, and the like, and are used by being reconnected.

Reference numeral 6 denotes a suction tube for discharging waste and perfusate sucked by the crushing handpiece 5A (or perfusion suction handpiece 5B). A suction pump 7 for generating a suction pressure is provided behind the suction tube 6, and the drive of the suction pump 7 is controlled by a control unit 8. The sucked waste and the perfusate are discharged and dumped in the waste bag 9.

Reference numeral 10 denotes a pressure sensor, and 11 denotes a solenoid valve.
The pressure sensor 10 and the electromagnetic valve 11 are connected to the suction tube 6 via the connection part 12. The pressure sensor 10 constantly detects the suction pressure, and when the suction pressure rises above a set value, the electromagnetic valve 11 is opened under the control of the control unit 8 to flow air and reduce the suction pressure. The upper limit of the suction pressure is set by a switch operation of the input unit described later.

Reference numeral 13 designates various switches for setting modes such as a perfusion mode, a perfusion / suction mode, a perfusion / suction / ultrasonic emulsification mode, and setting an ultrasonic oscillation output, a suction flow rate, and a suction pressure. Input section.

Reference numeral 14 denotes a foot switch. The foot switch 14 is set according to a mode setting set by the input unit 13.
As shown in FIG. 2, the operation of perfusion, suction, and ultrasonic emulsification can be controlled according to the depressed position.

FIG. 3 is a side view of the foot switch,
FIG. 4 is a view seen from above, and is partially a perspective view.

The foot switch 14 switches between perfusion, suction, and ultrasonic emulsification operations according to the stepping position and variably adjusts the ultrasonic output, and a reflux mechanism that temporarily reverses the suction flow. And will be described separately.

(Stepping operation mechanism) 20 is a base portion, 2
1 is a step portion. The rear of the step portion 21 (left direction in the figure) is connected to the base portion 20 by a shaft 22, and the step portion 21 is rotatable about the shaft 22 in the direction of arrow A in FIG. A spring 23 is interposed between the step portion 21 and the base portion 20, and the step portion 21
When no force is applied, the state shown in FIG. 3 is maintained.

Reference numeral 24 denotes a potentiometer having a shaft 24a.
It is fixed in 0. When the depressed portion 21 is depressed in the direction of arrow A, the potentiometer 24
4a is pushed down to detect the amount of stepping (stepping angle).

FIG. 5 shows an example of the setting of the switching position (position) based on the stepping amount (stepping angle) detected by the potentiometer 24. For this switching position (position), several patterns can be set and stored in advance. The operator selects a switching position (position) pattern that is most suitable for the operator by using a switch of the input unit 13 from among these several switching position (position) setting patterns.

Reference numeral 25 denotes a stepping member having a gear portion 25a, and the stepping member 25 is fixed in the stepping portion 21. Reference numeral 26 denotes a pulse motor fixed to the base portion 20, and a gear 27 that meshes with a gear portion 25 a of the stepping member 25 is attached to a rotation shaft 26 a of the pulse motor 26. The pulse motor 26 has a switching position A, which is detected by the potentiometer 24 as shown in FIG.
The same voltage is applied to B and C. Since a pulse motor has a self-holding force that tends to hold a magnetic field when a voltage is applied, when a voltage is applied to the pulse motor 26, a load is applied to the rotating shaft 26a due to the self-holding force. Further, since the self-holding force is enhanced by increasing the applied voltage, a higher voltage is applied to the switching position B than to the switching position A and to the switching position C than to the switching position B. A large load is applied, and as the vehicle moves from position 1 to position 2 and from position 2 to position 3, a greater force may be required by depressing.

Reference numeral 28 denotes a solenoid. Solenoid 28
Is fixed to the shaft 22 by a mounting member 29, and rotates about the shaft 22 as a center of rotation together with the stepped portion 21. 28
Reference numeral a denotes a movable portion of the solenoid 28, and the movable portion 28a is automatically returned to the original position by a spring when no voltage is applied. The solenoid 28 has
Voltage is applied at the switching positions A, B, and C detected by the potentiometer 24 as shown in FIG.
Drives the movable portion 28a. When the movable part 28a moves, a vibration is caused, and the operator can move the movable parts 28a to the positions 1, 2, 3
Recognize the switching of. In the embodiment, the solenoid 28
Is fixed to the shaft 22 by the mounting member 29,
Even if the solenoid 28 is separately fixed to the stepping portion 21 by an attachment member, the operator can recognize the switching between the positions 1, 2, and 3.

(Reflux mechanism) 30 is a leaf spring fixed to the front side of the base portion 20 via a spacer (not shown). At the front end of the leaf spring 30, a reflux pedal 31 to which an operator touches the left side of the foot is fixed. Further, a switch terminal of a reflux switch 32 held on the base portion 20 is attached in front of the reflux pedal 31. When the operator operates the foot of the reflux switch 32, the reflux pedal 31 is moved outward (left side).
It is energized when pressed. When the operator releases his / her foot, the reflux pedal 31 to which the reflux switch 32 is energized returns to the non-energized position by the action of the leaf spring 30.

The potentiometer 24, the pulse motor 26, the solenoid 28, and the reflux switch 32 of the depression operation mechanism and the reflux mechanism are connected to the control unit 8 via a communication cable 35, respectively.

Next, the operation of the apparatus having the above configuration will be described focusing on the operation of the foot switch 14. Here, a description will be given of an example of an ultrasonic phacoemulsification performed using the crushing handpiece 5A. The operation mode in this case is set to a perfusion / aspiration / ultrasonic emulsification mode.

In the perfusion / suction / ultrasonic emulsification mode, the operation of perfusion, suction, and ultrasonic emulsification can be controlled by adjusting the foot switch 14 for depression. Also,
When the foot switch 14 is in the position 3, the output of the ultrasonic oscillation can be controlled within a set range by adjusting the depression of the foot switch.

The signal of the amount of depression of the depression unit 21 detected by the potentiometer 24 is subjected to predetermined processing and sent to the control unit 8. The control unit 8 controls the operation of each drive mechanism as follows based on the signal of the amount of depression.

As shown in FIG. 5, when the stepping amount (stepping angle) reaches each of the switching positions A, B and C,
The same voltage is applied to the pulse motor 26, and the rotating shaft 26a
To provide a holding force. Therefore, in the switching positions A, B, and C, a large force must be applied to the depression. Further, by applying a larger voltage to the switching position B than to the switching position A and to the switching position C than to the switching position B, a larger load is applied to the rotating shaft 26a. As you proceed with 3, it is also possible to require a greater force to step on. With these methods, the operator has to select a position by adjusting the force of stepping consciously, so that the possibility of erroneous operation such as erroneous entry into a position other than the desired position is reduced. Further, a voltage is also applied to the solenoid 28 at each of the switching positions A, B, and C (the magnitude of the voltage is not changed), and the solenoid 28 is driven to generate vibration, so that the operator can be moved to the positions 1 and 2.
Switching between a few can be more clearly recognized.

Further, since several patterns can be set in advance for the switching positions A, B, C (positions 1, 2, 3), the operator can select the switching position which is most convenient to use, and can select a plurality of operations. The operator can operate at the switching position suitable for each.

On the other hand, the control unit 8 opens the perfusion control valve at the position 1 to put the perfusate in the injection state. When the control unit 8 reaches the position 2, it starts the suction by driving the suction pump.
, The ultrasonic vibration is generated in the crushing handpiece 5A. Further, at the position 3, the stepping amount is detected by the potentiometer 24, and the output of the ultrasonic oscillation of the crushing handpiece 5A changes. As described above, the surgeon can control the operations of perfusion, suction, and ultrasonic emulsification by adjusting the depression of the foot switch, and can variably adjust the ultrasonic output.

In the above, perfusion /
Although the case where the suction / ultrasonic emulsification mode is set and the crushing handpiece 5A is used is shown, the perfusion / suction mode is set by the input unit 13 and the perfusion for residual cortical suction is performed in place of the crushing handpiece 5A. When the suction handpiece 5B is used, the suction flow rate or the suction pressure can be variably adjusted by stepping on a foot switch.
Which of the suction flow rate and the suction pressure is variably adjusted is selected by a switch of the input unit 13.

In the above embodiment, the same voltage is applied to the pulse motor 26, and further, the magnitude of the applied voltage is changed to change the weight of the stepping portion 21 (self-holding force against the stepping force). The method and the method of applying a voltage to the solenoid 28 to generate vibration allow the operator to more clearly recognize the switching between the positions 1, 2, and 3, but the solenoid 28, the movable portion 28a, and the mounting member 2
9 is omitted, and only the method of applying the same voltage to the pulse motor 26 or changing the magnitude of the applied voltage to change the weight of the step portion 21 (self-holding force against the stepping force) is used. Alternatively, the operator may be made aware of the switching between the positions 1, 2, and 3.

The operation signal by the stepping operation of the foot switch is a control signal for the operation of the perfusion, suction, and ultrasonic emulsification of the ultrasonic cataract operation apparatus shown in the embodiment, the output of the ultrasonic oscillation, the suction flow rate or the suction pressure. However, the present invention is not limited to such adjustment signals, and can be used, for example, for giving signals to various surgical apparatuses such as setting of coagulation conditions of a photocoagulation apparatus.

[0039]

As described above, according to the present invention,
It is easy to detect the switching position of the foot switch, and it is easy to fix it at each operation stage, and the operator can freely select the switching position, so that surgery using an ophthalmic surgery device equipped with a foot switch can be performed efficiently. It can be performed safely and according to the needs of multiple operators.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of an apparatus according to an embodiment.

FIG. 2 is a diagram showing the operation of perfusion, suction, and ultrasonic emulsification depending on the depressed position of a foot switch.

FIG. 3 is a side view of a foot switch of the device according to the embodiment.

FIG. 4 is a top view of a foot switch of the device according to the embodiment.

FIG. 5 is a diagram illustrating switching of a position position by depressing a foot switch.

[Explanation of symbols]

 8 Control unit 14 Foot switch 21 Depressing unit 24 Potentiometer 26 Pulse motor 31 Reflux pedal

Claims (5)

[Claims] 1. A foot switch connected to an ophthalmic surgery apparatus for operating an operating eye and providing an operation signal of the apparatus,
A stepping mechanism having a footrest for stepping on the footrest, stepping position setting means for setting a stepping position for issuing a desired operation signal, and storage for storing a position set by the stepping position setting means; Means, detecting means for detecting a stepping position of the stepping mechanism, suppressing means for suppressing operation of the stepping mechanism based on a detection result of the detecting means and a set position stored in the storage means, An operation signal transmitting means for generating an operation signal based on a detection result of the means and a set position stored in the storage means. 2. An ophthalmic surgery apparatus according to claim 1, wherein said stepped position setting means can set the stepped position to be set in a plurality of stages. 3. The ophthalmic surgery foot switch according to claim 1, wherein said stepping position setting means can set a stepping position to be set in a plurality of stages, and said suppressing means makes the operation of said stepping mechanism equal or different. An ophthalmic surgery apparatus characterized in that it is controlled stepwise by a force of a different magnitude. 4. The ophthalmic surgery foot switch according to claim 1, wherein said stepped position setting means has a pattern storage means for storing a plurality of setting patterns, and a selecting means for selecting a setting pattern. An ophthalmic surgery apparatus characterized by the above-mentioned. 5. A perfusion solution supply means for supplying the perfusion solution in the perfusion bottle to the eye, a suction means for aspirating the supplied perfusion solution together with waste in the eye, and an intraocular solution utilizing ultrasonic vibration. An emulsifying means for crushing and emulsifying the tissue, an ophthalmic surgery apparatus comprising a footrest, a stepping mechanism for stepping on the footrest, and a stepping position setting for setting a stepping position for issuing an intended operation signal. Means, storage means for storing the position set by the stepping position setting means, detecting means for detecting the stepping position of the stepping mechanism, and a detection result of the detecting means and a setting position stored in the storage means. Operation signal transmitting means for generating an operation signal based on the operation signal;
Suppression means for suppressing the operation of the stepping mechanism based on the detection result of the detection means and the set position stored in the storage means; and operation of the suction means and / or the emulsification means based on the operation signal. An ophthalmic surgery apparatus, comprising: a control unit for controlling.