JPH0280062A - Laser device - Google Patents

Abstract

PURPOSE:To enable stable further proper medical treatment to be always attained by providing a selecting means selecting an output of a mean power detecting means or an output of a peak power detecting means in accordance with an input content of a treatment mode input means and a control means controlling an output of a resonator in accordance with the selected output of the selecting means. CONSTITUTION:By an input of a treatment mode input means 9, a control part 10 controls a selector 5 supplying power (value of mean power or peak power) necessary for an input treatment mode to a comparator 6. Simultaneously, either select display means 15 or 16 corresponding to the selected power is turned on. An input from a power setting means 12 is supplied to the comparator 6 as the reference value and compared with a selected output of the selector 5. Thus by an output of the comparator 6, a laser power source 7 is controlled, and a feedback is applied so as to stabilize a laser output. In this way, when the treatment mode is selected, mean power or peak power of applying the feedback is automatically selected, so that stable further proper treatment can be always attained with no mistake.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a laser device used for treatment of a living body.

[Prior Art] Generally, in a laser device used for treatment of a living body, C
Some lasers are capable of oscillating both W (continuous wave laser) and Q-sv pulse (pulsed wave laser).

In CW, constant power irradiation is performed, and in Q-sw pulse, the average power is lower than CW, but the peak power is lower than CW.
It can be several times as large.

In addition, when measuring the power of a laser beam, a heat-sensitive object is generally used, so the CW power and the average power of the Q-sν pulse can be measured, but the peak power of the Q-sv pulse can be directly measured. The reality is that accurate measurements cannot be made.

However, there is a technique for calculating the peak power from the pulse waveform and average power, as disclosed in Japanese Patent Laid-Open No. 63-114188.

Further, as in Japanese Patent Application Laid-Open No. 63-116481, an apparatus that measures both average power and peak power has been proposed.

By the way, there is a difference between Q-sv pulse irradiation and CW irradiation even with the same average power, and in actual treatment,
There are some, such as No. 3-23648, in which peak power is important.

In addition, there are many ways to use laser light, including hemostatic coagulation, hyperthermia, incision, and PDT, and it is currently unclear whether each treatment requires average power or peak power. It's becoming clear.

[Problems to be Solved by the Invention] However, in conventional devices, power selection is dependent on manual operation, which may cause a problem that the power is not appropriate for treatment.

This invention was made in view of the above circumstances,
The purpose is to provide a laser device that can automatically select the average power and peak power required for depression treatment, thereby enabling stable and appropriate treatment at all times. .

[Means for Solving the Problem] A resonator, an average power detection means for detecting the average power of the laser beam emitted from the resonator, and a peak power detection means for detecting the peak power of the laser beam emitted from the resonator. means, a treatment mode input means for inputting a treatment mode, a selection means for selecting the output of the average power detection means or the output of the peak power detection means according to the input content of the treatment mode input means, and this selection means. and control means for controlling the output of the resonator according to the selected output of the means.

[Operation] When a treatment mode is input, the power corresponding to that treatment mode is selected.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a resonator that emits laser light, and a portion of the laser light is supplied to waveform detection means 2 and average power detection means 3.

The waveform detection means 2 detects the waveform of laser light.

The average power detection means 3 detects the average power of the laser beam.

Thus, the output of the waveform detection means 2 and the output of the average power detection means 3 are supplied to the peak power detection means 4, where the peak power of the laser beam is detected (calculated).

Furthermore, the output of the average power detection means 3 and the output of the peak power detection means 4 are supplied to a switch 5. This switch 5 is configured to select one of the outputs in accordance with a command from a control section 1o, which will be described later.

The selection output of the switch 5 is supplied to a comparator 6, where it is compared with a reference value from the control section 10. This comparison result is supplied to the laser power source 7.

The laser power source 7 is connected to the comparison output of the comparator 6 and the control section 10.
The drive power is supplied to the resonator 1 in accordance with the command. This controls the output of the resonator 1.

In this way, from the waveform detection means 2 to the laser power source 7,
It forms a feedback system for output control.

On the other hand, numeral 10 is a control section that controls the entire laser device, and is composed of a microcomputer and its peripheral circuits. In addition to the switching device 5, comparator 6, and laser power source 7, this control section 10 includes a treatment mode input means 11, a power setting means 12, a foot switch 13, and a peak power selection display means 15 via an inverter circuit 14. Average power selection display means 16 is connected.

Further, the output of the peak power detection means 4 is supplied to the peak power display means 17. The output of the average power detection means 3 is supplied to the average power display means 18.

By the way, the treatment mode input means 11 and the power setting means 12 are provided on the panel section of the main body of the apparatus, as shown in FIG.

The treatment mode input means 11 is a plurality of button switches for setting various treatments. Power setting means 12
There is a volume knob. Next to the volume knob is a terminal 13a for attaching a foot switch 13.

Next, the operation in the above configuration will be explained.

The output waveform of the laser beam emitted from the resonator 1 is detected by the waveform detection means 2, and the average power is detected by the average power detection means 3. Then, based on the output of the waveform detection means 2 and the output of the average power detection means 3, the peak power of the laser beam is detected by the peak power detection means 4. This detection is performed, for example, by calculating average power, pulse width, and pulse frequency.

The output values of the average power detection means 3 and the peak power detection means 4 are displayed on the average power display means 18 and the peak power display means 17, respectively.

Further, the output values of the detection means 3.4 are both input to the switching device 5, and only one of them is incorporated into the comparator 6 and the laser power source 7, which are the subsequent feedback lines.

When a desired treatment mode is input using the treatment mode input means 11, the operation specifications of the foot switch 13 are changed or Q-8ν is turned on.

A temperature measuring device (
It is also possible to set whether or not control is to be performed using the output of a controller (not shown).

That is, in response to the input from the treatment mode input means 9, the control unit 10 controls the switch 5, and the power (average power or peak/lower value) required for the input treatment mode is supplied to the comparator 6. . At the same time, either the selection display means 15 or 16 corresponding to the selected power lights up.

The input from the power setting means 12 is used as a reference value by the comparator 6.
and is compared with the selected output of the switch 5.

In this way, the laser power source 7 is controlled by the output of the comparator 6, and feedback is applied to stabilize the laser output.

Further, the operation for generating and stopping the laser beam is performed using the foot switch 13, and the specifications thereof are also determined by the manual treatment mode. For example, in the case of hemostasis or incision, laser light is generated only when the foot switch 13 is pressed, but in the case of thermotherapy or PDT, it takes time, so -
If you step on it once, it will generate a laser beam, and if you step on it again, it will stop the laser beam.

In this way, when a treatment mode is selected, the type of power to apply feedback (average power or peak power) is automatically selected, so that there is no error and stable and appropriate treatment is always possible.

Further, since the specifications of the foot switch 13 are set at the same time, there is no need to set each one separately, which is convenient.

Furthermore, it is convenient because the values of both powers are displayed for both. Moreover, since there is only one power setting knob, no matter which power you want to set, you only have to move one knob without thinking about it, making it easy to use.

A second embodiment is shown in FIG.

In this embodiment, the comparator is divided into a peak power comparator 21 and an average power comparator 22, the power setting means is divided into an average power setting means 25 and a peak power setting means 26, and the switch 5 is a comparator. , and the display means are now only the display switch 23 and the power display means 24.

In this case, only the value of the power being controlled is displayed on the power display means 24. There are two power setting means; when average power is selected, the average power setting means 25 is used, and when peak power is selected, the peak power setting means 26 is used to set the power. .

In other words, there is only one power display, which is easy to see, and only the information necessary for the current settings is clearly displayed. Also, since there are two power setting knobs, for example, if you set the average power last time and set the peak power this time, the previous average power setting will be stored in the knob. .

Note that in the first embodiment and the second embodiment, the resonator 1
In detecting the power of the laser beam, the laser beam may be taken from a resonant mirror at the rear of the resonator 1, or a small amount of the laser beam may be taken out from the forward output using a half mirror.

A third embodiment is shown in FIG.

The basic configuration is the same as the first embodiment.

The difference is that the laser light emitted from the resonator 1 passes through the light guide path 3.
1 (for example, lenses, nonlinear elements, fibers, etc.) and
There are a light guide output average power detection means 32 for measuring the average power of the output light from there, a light guide output waveform detection means 33 for detecting the output waveform, and a light guide output peak power detection means 34. The outputs of the detection means 32 and the light guide output peak power detection means 34 are transmitted to the control section 1.
This point is input as 0.

Before actually using the device, the average power and peak power of the output light from the light guide path 31 are determined by outputting various reference values from the control unit 10 to the comparator 6, and the output light from the light guide path 31 is The control unit 10 stores the reference value to be sent to the comparator 6 in order to set the average power or peak power to a certain value. If measurements cannot be made for all cases, interpolation may be used.

Then, in actual use, the control section 10 derives a reference value necessary for outputting the same amount of output light from the light guide path 31 as the set value from the power setting means 12, and supplies it to the comparator 6.

In this embodiment, the output at the tip of the light guide path 31, that is, the value of the laser light actually used for treatment, is controlled, and stability can be improved.

Regarding the display, in the third embodiment, the power of the resonator 1 is displayed, but the output power (planned value) of the light guide path 31 may be displayed based on the output of the control unit 10, or both may be displayed. You can.

In addition, feedback is applied to all examples to stabilize the power, but if stability is achieved, the comparators 6, 21, 22 and the switch 5 can be removed, and the power can be displayed by inputting the treatment mode. Alternatively, it is also possible to directly control the laser power source 7 using the control unit 10 by switching only the power setting knob.

[Effects of the Invention] As described above, according to the present invention, there is provided a resonator, an average power detection means for detecting the average power of the laser beam emitted from the resonator, and a peak detection means for detecting the average power of the laser beam emitted from the resonator. peak power detection means for detecting power;
a treatment mode manual means for inputting a treatment mode; a selection means for selecting the output of the average power detection means or the output of the peak power detection means according to the manual content of the treatment mode input means; and selection means for selecting the selection means. and a control means for controlling the output of the resonator according to the output.
The average power and the peak power required for depression treatment can be automatically selected, thereby providing a laser device that always enables stable and appropriate treatment.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of the first embodiment of the present invention, FIG. 2 is a diagram showing the specific configuration of the treatment mode input means in the same embodiment, and FIG. 3 is a diagram showing the specific configuration of the treatment mode input means in the same embodiment. FIG. 4 is a diagram showing the structure of a third embodiment of the present invention. 1... Resonator, 3... Average power detection means, 4...
- Peak power detection means, 5... Switch, 6... Comparator, 7... Laser power supply, 10... Control unit, 11.
...Treatment mode input means.

Claims (1)

[Claims] a resonator, an average power detection means for detecting the average power of the laser light emitted from the resonator, a peak power detection means for detecting the peak power of the laser light emitted from the resonator, and for inputting a treatment mode. treatment mode input means; selection means for selecting the output of the average power detection means or the output of the peak power detection means according to the input content of the treatment mode input means; 1. A laser device comprising: a control means for controlling the output of the laser device.