JPH0112490B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a laser device used for treatment and processing.

[Prior Art] As a therapeutic laser device, a laser device that performs treatment by passing a laser probe through a forceps channel of an endoscope and cauterizing a lesion in a body cavity has been developed. In such a laser device, the laser output needs to be varied depending on the type of lesion. Here, even if the setting values of the laser oscillators are the same, the values of the laser light actually output from the laser probes may differ due to differences in the characteristics of each laser probe or laser oscillator or changes over time. Therefore, before use, it was necessary to vary the settings of the laser oscillator, measure the actual output values of the laser probe at that time, and record or store these values. As a conventional example of this recording or storage, there is a laser surgical device as disclosed in, for example, Japanese Unexamined Patent Publication No. 58-46951. This device has a laser oscillator, laser output measuring device, and memory built into the main body of the laser device, and the tip of the laser probe is inserted into the laser output measuring device through the laser probe insertion port on the operation panel of the main body, and the laser output is is measured. The operation panel also has an adjustment knob for adjusting the laser output, a display section that displays measured values, set values, and measured values, and a memory switch that stores the set values and measured values. Then, by pressing the memory switch while operating the adjustment knob to vary the laser output, the measured value displayed on the display unit is stored in the memory in association with the setting value of the adjustment knob at that time. With this method, a memory switch must be pressed each time a set value and measured value are stored, and as the number of measured values to be stored increases, the number of times the memory switch must be pressed increases accordingly, making the switch operation cumbersome. There were flaws.

[Objective] This invention has been made to address the above-mentioned circumstances, and an object thereof is to provide a laser device that can store a large number of measured values of laser output in correspondence with the set values of a laser oscillator with a simple operation. .

[Summary] The purpose is to provide a laser oscillation means for generating a laser output, a means for adjusting the laser output of the laser oscillation means, a means for measuring the laser output oscillated from the laser oscillation means, and a setting for the adjustment means. means for detecting that the change in value is within a predetermined range and that the change in the measured value of the measuring means is within a predetermined range; This is realized by a laser device equipped with means for storing the values in correspondence with each other.

According to this laser device, once the set value of the laser oscillation means is determined, the measured value of the laser output at that time and the set value are automatically stored in association with each other.

[Embodiment] An embodiment of a laser device according to the present invention will be described below with reference to the drawings. 1 and 2 are perspective views of this embodiment, and FIG. 3 is its block circuit diagram. As shown in FIG.
and a laser device main body 3, and a laser probe 3 is inserted into the forceps channel 1a of the endoscope 1. The input connector portion 3a of the laser probe 3 is connected to the output socket 2a of the laser device main body 2. Further, on the front panel of the laser device main body 2, an adjustment knob 5a of a laser output adjuster 5 as a laser output adjustment means, a display 6 as a display means, a laser output measuring device 7 as a laser output measuring means, and a mode switch 8 are provided. is provided. The laser output measuring device 7 measures the laser output emitted from the tip of the laser probe 3 by inserting the tip of the laser probe 3 as shown in FIG. Although a normal photoelectric converter is used here, a power meter consisting of a thermocouple may also be used.

In the block circuit diagram shown in FIG.
Parts corresponding to those in the figures are given the same reference numerals. An adjustment knob 5a of the laser output regulator 5 is connected to a potentiometer 9, and the output voltage of the potentiometer 9 is varied in conjunction with rotation of the adjustment knob 5a.
The potentiometer 9 consists of a 1KΩ fixed resistor and a 1KΩ sliding resistor connected in series between, for example, a +5V power supply and ground, and is configured such that the output voltage is taken out from the sliding point of the sliding resistor. The output voltage of the potentiometer 9 is supplied to the laser output regulator 5 and is also transmitted via the A/D converter 11.
It is input to the CPU 14. Laser output regulator 5 causes laser oscillator 10 to oscillate in accordance with the output voltage of potentiometer 9. Thereby, the output value of the laser oscillator 10 is proportional to the output of the laser output regulator 5, that is, the output of the laser output regulator 5 becomes the set value of the laser oscillator 10. Laser light emitted from the laser oscillator 10 is incident on the photoelectric converter 12 in the photoelectric converter 7 via the laser probe 3 . The output signal of the photoelectric converter 7 is input to the CPU 14 via the A/D converter 13. CPU1
4 is connected to a mode switch 8, a storage device 15, and a display 6. Although not shown, the mode switch 8, storage device 15, display 6, and A/D converters 11 and 13 are connected to the CPU 14 via a suitable interface.

The operation of this embodiment will be explained with reference to the flowchart shown in FIG. Here, for convenience of explanation, buffers 1 to 4 are stored in the storage device 15.
There are 4 battles, and battles 1 and 2 are 20 each.
It is assumed that bytes and buffers 3 and 4 each have a capacity of 8 bytes. Here, 11 and 13 of the A/D converter
The output data is 8 bits, and buffers 1 and 2
can store 20 pieces of data each, and buffers 3 and 4 can each store 8 pieces of data.

When the operation is started, an initial setting operation is performed as shown in step S1, and for example, buffers 1 to 4 are cleared. In step S2, it is determined whether the mode switch 8 is in the setting mode. The setting mode refers to an operation mode in which a correspondence table between setting values of the laser oscillator 10 and actual output values is created in the storage device 15. If the mode is not set, the operation ends. In the setting mode, the process waits for 100 ms as shown in step S3. This is because processing such as switching is performed during this time.

In step S4, the laser output value data (8 bits) at the output end of the laser probe measured by the photoelectric converter 7 is stored in the buffer 1. next,
In step S5, the output of the potentiometer 9, that is, the set value data (8 bits) of the laser oscillator 10 is stored in the buffer 2. Here, data is stored periodically in order in addresses 1 to 20 and 1 to 20 of buffers 1 and 2. In step S6, the average value of the 20 data (measured value data) in buffer 1 is calculated.
Hpw is calculated. In step S7, this average value
It is determined whether Hpw is larger than a predetermined value α.
If the average value Hpw is smaller than the predetermined value α, the "output setting" display is turned off as shown in step S8, the flag F is set to 0 as shown in step S9, and the process returns to step S2 again. The display of "output setting" and flag F will be described later. Here, the predetermined value α is
Corresponds to a measurement value of 10W. This is because in this example the laser power cannot be adjusted below 10W,
This is because there is no point in storing set values and measured values.

If it is determined in step S7 that the average value Hpw is larger than the predetermined value α, that is, if it is determined that the average value of the measured values of the laser output is 10 W or more, the buffer 2 is determined as shown in step S10.
The average value Hpot of 20 pieces of data (laser oscillator setting value data) is calculated. Step S1
Average value of 20 measurement data in buffer 1
The deviation (sum of 20 deviations) δpw with respect to Hpw is calculated, and in step S7, the deviation (sum of 20 deviations) δpot with respect to the average value Hpot of the 20 setting value data in buffer 2 is calculated. This is because there is a delay in the operation of the potentiometer 9 with respect to the rotation of the adjustment knob 5a, and because it takes some time to generate a measured value after the laser beam is input, so it is determined that the set value and measured value are stable. It's for a reason. Therefore, in step S13, it is determined whether the deviation δpw of the measured value data is smaller than the predetermined value β and the deviation δpot of the set value data is smaller than the predetermined value γ. Here, the predetermined value β corresponds to the measured value of 3W,
The predetermined value γ corresponds to the set values of 11Ω and 30mV. If both deviations are smaller than the predetermined values β and γ, the setting value for the laser oscillator 10 and the photoelectric converter 7
This means that both of the measured values have reached a stable state, so the set value and the measured value are stored in correspondence from step S14 onwards. If at least one of the deviations is smaller than the predetermined value, steps S8 and S9 are performed.
The operations from step S2 onwards are executed again via , and new measured values and set values are stored in buffers 1 and 2.

In step S14, it is determined whether the flag F is 0 or not. As described later, the average value Hpot of the setting values
After the average value Hpw of the measured values is associated and stored in buffers 3 and 4, the flag F becomes 1.
be made into Therefore, before the set value and measured value are stored in the buffers 3 and 4, the flag F is always 0.
If the flag F is 0, as shown in step S15, the average value Hpot of the setting value data is equal to the buffer 3.
The average value Hpw of the measured value data is stored in the buffer 4 in step S16. As a result, the set value and output value of the laser oscillator 10 are stored in the buffers 3 and 4 in correspondence. In step S17, the "output setting" display is turned on, and in step S18, flag F is set to 1. In step S19, it is determined whether the buffers 3 and 4 are full, that is, whether eight sets of set values and output values of the laser oscillator 10 have been stored. If it is full, the operation ends, and if it is not full, the operations from step S2 onwards are executed again. It is assumed that the adjustment knob 5a is being operated during this time. When the adjustment knob 5a is operated and the set value is changed, the determination in step S13 will be "No" until the set value and measured value are stabilized, so the "output setting" will be changed as shown in steps S8 and S9. The display is turned off and flag F is returned to 0. As a result, if the determination in step S13 is "yes", steps S15 and S16 are immediately performed.
The set values and measured values are stored in buffers 3 and 4.

According to the embodiment, the operator operates the adjustment knob 5a to vary the set value of the laser oscillator 10, and when the CPU 14 determines that the set value and the measured value are stable, the set value and the measured value are automatically changed. Since the laser output measurement values are stored in correspondence with the values set for the laser oscillator 10, a large number of laser output measurement values can be easily stored in correspondence with the set values for the laser oscillator 10 without the need for complicated switch operations as in the conventional case. Also, since the set values and measured values are average values,
A more accurate correspondence table between set values and measured values can be obtained.

When actually using this laser device,
The CPU 14 reads the setting value of the potentiometer 9, reads out the corresponding measured value from the table stored in the buffers 3 and 4 of the storage device 15, and displays it on the display 6. This allows the operator to know the laser output value actually emitted from the laser probe 3.

Note that this invention is not limited to the embodiments described above, and can be modified in various ways. For example, in the above embodiment, the deviations δpw and δpot are the sum of the deviations of each of the 20 pieces of data, and this sum is calculated and then compared with a predetermined value. You can. Furthermore, after determining the deviation of the data in Buffer 1 and Buffer 2, both were compared with a predetermined value, but once one of them is determined, it may be immediately compared with a predetermined value. In this way, it is possible to quickly determine if the value is smaller than a predetermined value, that is, if the set value or measured value is not stable.
What is important is that it is ultimately determined that all the data in Buffer 1 and Buffer 2 fall within a predetermined deviation range from each average value.

[Effects of the Invention] As explained above, according to the present invention, there is no need to operate a switch for memorizing, and the measured value of the laser output and the set value for the laser oscillator can be set by the simple operation of setting the mode switch to the setting mode. A laser device is provided that can store a large number of data in correspondence with each other.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of a laser device according to the present invention, FIG. 2 is a perspective view of an embodiment for measuring laser output, FIG. 3 is a block circuit diagram of this embodiment, and FIG. The figure is a flowchart explaining the operation of this embodiment. 1... Endoscope, 2... Laser device main body, 3... Laser probe, 5... Laser output adjuster, 6... Display device,
7... Photoelectric converter, 8... Mode switch, 9... Potentiometer, 10... Laser oscillator, 15... Storage device.

Claims (1)

[Claims] 1 A laser oscillation means for generating a laser output, a means for adjusting the laser output of the laser oscillation means, a means for measuring the laser output oscillated from the laser oscillation means, and a change in the setting value of the adjustment means and a means for detecting that the change in the measured value of the measuring means is within a predetermined range, and a means for associating the set value and the measured value according to a detection signal of the detecting means. A laser device comprising means for storing information.