JP3953643B2 - Laser therapy device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to laser treatment in which treatment is performed by irradiating a treatment site (affected area) of a patient with laser light.
The present invention relates to a treatment device.
[Prior art]
[0003]
Conventionally, there is known a laser treatment apparatus that performs treatment by irradiating a treatment site (affected area) of a patient with a laser beam. When laser irradiation is performed with such a laser treatment apparatus, it is necessary to irradiate the affected area with laser light having the intensity most suitable for the treatment. Therefore, referring to the value displayed on the display of the apparatus, the operator operates the knob or switch, and the energy amount of the irradiated laser light (hereinafter referred to as the irradiation energy amount) becomes a desired value. Was set (adjusted).
[0004]
[Problems to be solved by the invention]
However, in the conventional apparatus, the value of the irradiation energy amount to be displayed, the value of the irradiation energy amount of the laser light that will be oscillated according to the setting (hereinafter referred to as an expected value), and the laser light detected by the test oscillation There is a value of the irradiation energy amount (hereinafter referred to as an actual measurement value), and since the predicted value and the actual measurement value are displayed in the same manner, it is difficult to distinguish them, and there is a possibility that the surgeon may make a mistake. Moreover, it was not possible to instantly confirm whether or not the predicted value and the actually measured value matched.
[0005]
In view of the above problems, the present invention can prevent misprediction between the predicted value of the irradiation energy amount to be displayed and the actually measured value, and can instantly confirm whether or not the predicted value and the actually measured value match. It is a technical problem to provide a laser treatment apparatus.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the present invention is characterized by having the following configuration.
[0007]
(1) In a laser treatment apparatus including a laser oscillator that oscillates a therapeutic laser beam, an energy amount setting unit that sets an irradiation energy amount of the laser beam, and a detection unit that detects an irradiation energy amount of the oscillated laser beam Display means for displaying a set irradiation energy amount value by a first display method and displaying a detected irradiation energy amount value by a second display method different from the first display method; Control means for controlling the laser oscillator so as to test-oscillate the laser beam when the irradiation energy amount is set by the energy amount setting means; a set irradiation energy amount value and a detected irradiation energy amount value; Comparing means for comparing the first and second display methods based on a comparison result by the comparing means. The display is performed by a display method different from the method.
(2) In the laser treatment apparatus according to ( 1 ), when it is determined by the comparison means that the set value of the irradiation energy amount and the detected value of the irradiation energy amount match within a predetermined range. The display means displays the value of the detected irradiation energy amount by a display method different from the first and second display methods.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings, taking as an example a laser treatment apparatus for treating glaucoma due to perforation of the subsequent cataract, iris, and corner with a giant pulse. FIG. 1 is a schematic external view of an apparatus according to an embodiment, and FIG. 2 is a configuration diagram of an essential part of an optical system and a control system of the apparatus.
[0017]
Reference numeral 1 denotes a laser treatment apparatus body in which a laser oscillator 9 and a light guide optical system 10 are provided. The laser oscillator 9 is provided with a solid laser rod, an excitation light source, a Q switch and the like not shown, and a giant pulse with a narrow pulse width and a large peak output can be obtained in a short time. The solid laser rod uses an Nd: YAG rod that oscillates light having a fundamental wavelength of 1064 nm.
[0018]
The light guide optical system 10 is provided with a beam splitter 11, a photodetector 12, a safety shutter 13, an aiming light source 15, a collimator lens 16, an aperture 17, a dichroic mirror 18, and the like. The photodetector 12 detects the laser light emitted from the laser oscillator 9 and partially reflected by the beam splitter 11. The safety shutter 13 is inserted into and removed from the laser optical axis as needed by driving the solenoid 14 to maintain the safety of laser irradiation. Aiming light emitted from an aiming light source 15 using a semiconductor laser is converted into a parallel light beam by a collimator lens 16, divided into two by an aperture 17 provided with two holes, and then reflected by a dichroic mirror 18, and is slit. The light is guided to the patient's eye E through the dichroic mirror 19 in the lamp delivery 4.
[0019]
Reference numeral 2 denotes a power supply unit, which is provided with a key control switch 21, a pilot lamp 22, and the like. The key control switch 21 is an activation switch for the apparatus. When the key is inserted and turned to the right to turn it ON, the apparatus is turned on. The pilot lamp 22 is turned on when the power is turned on.
[0020]
Reference numeral 3 denotes a control panel for setting laser irradiation conditions. As shown in the arrangement example of FIG. 3, the control panel 3 is provided with an input switch group 31 and a light emitting display section 32.
[0021]
The input switch group 31 includes a READY switch 31a for setting whether or not laser irradiation is possible, a PULSE / BURST setting switch 31b for setting the number of laser irradiations (number of irradiation pulses) for one trigger signal, and a COUNTER display for displaying the cumulative number of irradiations. A COUNTER RESET switch 31c for resetting the unit 32e (described later) is provided.
[0022]
The display unit 32 includes a READY lamp 32a indicating whether laser irradiation is possible, an AIMING OFF lamp 32b indicating whether the aiming light is on / off, an irradiation energy amount set by an energy adjustment knob 6 described later, and detection by the photodetector 12. ENERGY display section 32c for displaying the amount of irradiated energy, PULSE / BURST display section 32d for displaying the laser irradiation number (irradiation pulse number) set by the PULSE / BURST setting switch 31b, and COUNTER display section for displaying the cumulative irradiation number 32e, a FOCUS SHIFT display unit 32f that displays a shift amount between the focal position of the aiming light and the focal position of the laser light, a LASER EMISSION lamp 32g that is turned on when the laser power supply is introduced, and the like. The display unit 32 displays irradiation conditions set by a light emitting element such as an LED. The ENERGY display unit 32c is configured by two-color (blue and yellow) LEDs, and the other display units are configured by one-color (red) LEDs.
[0023]
Reference numeral 4 denotes a slit lamp delivery for irradiating the affected part of the patient's eye with the laser light while observing the patient's eye E, and includes a microscope unit 4a that houses the observation optical system and an illumination unit 4b that houses the illumination optical system. The microscope unit 4a includes an objective lens 41 shared by the left and right observation optical paths, a variable magnification optical system 42, an imaging lens 43, an erecting prism group 44, a field stop 45, and an eyepiece 46 that are arranged in the left and right optical paths. With. The variable magnification optical system 42 is appropriately switched depending on the set magnification. In addition, an operator protection filter is inserted in the optical path between the objective lens 41 and the imaging lens 43 during laser irradiation, but the illustration is omitted here. As a configuration of the illumination optical system of the illumination unit 4b, a known optical system is used, but a detailed description thereof is omitted because it is not related to the present invention. Reference numeral 47 denotes a contact lens for observing the affected part of the patient's eye.
Reference numeral 5 denotes a joystick for specifying the laser irradiation position, and a trigger switch 5a for transmitting a laser irradiation trigger signal is provided at the top. 6 is an energy adjustment knob for setting (adjusting) the amount of irradiation energy, and energy can be continuously set from 0.5 mJ (millijoule) to 10 mJ per pulse. Reference numeral 7 denotes a focus shift knob for shifting the focus position of the laser light with respect to the focus position of the aiming light. Reference numeral 8 denotes a gantry that can move up and down.
Next, the operation of the apparatus having the above configuration will be described based on the flowchart of FIG.
[0024]
First, the surgeon inserts a key into the key control switch 21 and turns it to the ON position. The apparatus is turned on and the pilot lamp 22 is turned on, and then the laser beam is test-oscillated. Also, the LASER EMISSION lamp 32g is turned on. The test oscillation is performed in a state where the safety shutter 13 is inserted on the laser optical axis, and the laser light emitted from the laser oscillator 9 is partially reflected by the beam splitter 11 and enters the photodetector 12. The control unit 50 calculates the irradiation energy amount of the laser light from the received light amount detected by the photodetector 12, and displays it on the ENERGY display unit 32c in units of 0.1 mJ. In this case, the displayed value is a value of the irradiation energy amount of the laser beam detected by the photodetector 12 (hereinafter referred to as an actual measurement value), and this is displayed in blue.
[0025]
Next, the number of irradiation pulses is set by the PULSE / BURST setting switch 31b as necessary. When the number of irradiation pulses is changed, the laser light is test-oscillated, and the average value of the energy amount per pulse is displayed on the ENERGY display portion 32c. Also in this case, since the displayed value is an actual measurement value, it is displayed in blue. The number of irradiation pulses is set to 1 when the key control switch 21 is turned on.
[0026]
Next, the energy adjustment knob 6 is turned to set (adjust) the irradiation energy amount. The value displayed on the ENERGY display section 32c is displayed in blue before setting (see FIG. 5A), but when the energy adjustment knob 6 is turned, the displayed value turns yellow (FIG. 5B). )reference). This is because the value displayed by the setting of the energy adjustment knob 6 is a value of the irradiation energy amount of the laser beam that will be oscillated by the setting (hereinafter referred to as an expected value), and is distinguished from the display of the actual measurement value described above. This is to prevent the surgeon from misidentifying the expected value and the actual measurement value.
[0027]
When the energy adjustment knob 6 is turned to change the expected value displayed in yellow to the expected irradiation energy value, the laser beam is test-oscillated, and the measured value is displayed on the ENERGY display section 32c.
[0028]
Here, when the expected value by the energy adjustment knob 6 matches the actual value by the photodetector 12, the actual value displayed on the ENERGY display section 32c is displayed in green (blue LED and yellow LED Both are turned on to the same degree (see FIG. 5 (c)). If the predicted value does not match the actual measurement value, the actual measurement value displayed on the ENERGY display unit 32c is displayed in blue (only the blue LED is lit, see FIG. 5D). Since the irradiation energy amount of the laser light changes due to environmental changes such as temperature changes inside and outside the laser oscillator and changes over time such as deterioration of the excitation light source, the predicted value and the actual measurement value may not match within a predetermined range. However, by changing the display of the actual measurement value when the predicted value and the actual measurement value coincide with each other to green, the surgeon can instantly confirm whether or not the predicted value and the actual measurement value coincide with each other.
[0029]
If the expected value and the actual measurement value do not match (when the actual measurement value displayed on the ENERGY display section 32c is blue), the energy adjustment knob 6 is further set (adjusted) until the actual measurement value is displayed in green. )I do.
[0030]
When the setting (adjustment) of the irradiation energy amount is completed, it is confirmed by the FOCUS SHIFT display section 32f whether the focus shift knob 7 is set to an appropriate value. Make irradiation possible. While the READY lamp 32a is turned on, the laser beam is test-oscillated, and the actual measurement value of the irradiation energy is displayed on the ENERGY display section 32c.
[0031]
The surgeon operates the joystick 5 so that the two aiming lights overlap one point on the affected part, and when it overlaps one point, presses the trigger switch 5a to irradiate the laser beam. The laser light applied to the patient's eye E treats the affected part by causing tissue destruction due to plasma generation. Since the number of times of irradiation is displayed on the COUNTER display unit 32e, the surgeon can check the number of times of laser light irradiation.
[0032]
When the laser irradiation is completed, the READY switch 31a is turned off to disable the laser irradiation (the READY lamp 32a is turned off). Then, the key control switch 21 is returned to the OFF position and the key is removed.
[0033]
In this embodiment, two-color (blue, yellow) LEDs are used for the ENERGY display section 32c, the actual measurement value by the photodetector 12 is displayed in blue, and the expected value by the energy adjustment knob 6 is displayed in yellow. When the measured value and the measured value match, the measured value is displayed in green, but even if the predicted value and the measured value do not match, the detected value is the measured value before setting (ex.10mJ) If the value (ex.9mJ) is between the value and the expected value (ex.8mJ), it can be displayed as blue-green, and if it is past the expected value (ex.7mJ), it can be displayed as yellow-green. . In this case, the control unit 50 may adjust the degree of light emission of the blue LED and the yellow LED. Further, by further increasing the number of colors of the LEDs, it is possible to distinguish between the case where the expected value and the actually measured value match, and the case where they do not match. Of course, various colors can be used for the LED.
Further, in the present embodiment, the predicted value and the actually measured value are displayed in different colors using two-color LEDs on the ENERGY display unit 32c, but the predicted value and the actually measured value are displayed by continuous light and blinking light with one color LED. It is also possible to distinguish between values and change the brightness of light. It is also possible to make a distinction by a combination of changing both color and brightness. Further, the display of the predicted value and the actual measurement value can be separately provided on the ENERGY display unit 32c to be distinguished (and can be distinguished by a combination such as changing the display color).
[0034]
【The invention's effect】
As described above, according to the present invention, by changing the display of the predicted value and the actual measurement value of the irradiation energy amount, it is possible to prevent the misunderstanding of the predicted value and the actual measurement value. It is possible to instantly confirm whether or not.
[Brief description of the drawings]
FIG. 1 is a schematic external view of an apparatus according to an embodiment.
FIG. 2 is a configuration diagram of a principal part of an optical system and a control system of an apparatus according to an embodiment.
FIG. 3 is a layout example of a control panel.
FIG. 4 is a flowchart for explaining the operation of the apparatus according to the embodiment.
FIG. 5 is a display example of an ENERGY display unit.
[Explanation of symbols]
2 Power supply section 3 Control panel 6 Energy adjustment knob 9 Laser oscillator 12 Photo detector 13 Safety shutter 32 Light emission display section

Claims (2)

  In a laser treatment apparatus including a laser oscillator that oscillates a therapeutic laser beam, an energy amount setting unit that sets an irradiation energy amount of the laser beam, and a detection unit that detects an irradiation energy amount of the oscillated laser beam are set. Display means for displaying the value of the irradiated energy amount by the first display method and displaying the detected value of the irradiation energy amount by a second display method different from the first display method; and the energy amount setting The control means for controlling the laser oscillator to test-oscillate the laser beam when the irradiation energy amount is set by the means, and the set irradiation energy amount value and the detected irradiation energy amount value are compared. Comparing means is provided, and the display means indicates the detected irradiation energy value based on the comparison result by the comparing means and the first and second display methods. Laser treatment apparatus and displaying by the display method comprising. In the laser treatment device according to claim 1 , when it is determined by the comparison means that the set value of the amount of irradiation energy and the value of the detected amount of irradiation energy match within a predetermined range, The laser treatment apparatus, wherein the display means displays the value of the detected irradiation energy amount by a display method different from the first and second display methods.

Images