JPH07136183A - Laser medical apparatus and probe used therefor - Google Patents

Abstract

PURPOSE:To enable the correction and control of the amount of emission automatically when various probes having fibers with laser light permeability mutually different are mounted on a laser knife device. CONSTITUTION:A memory 23 written with the permeability of a fiber 21 of a probe 2 in a connection part 20 thereof 2 is housed. When the probe 2 is connected to a laser knife device 1, the contents of the memory are read out with the laser knife device 1 to calculate and correct the amount of emission of the probe 2. This device enables the correction of an output of the probe to a desired value by the connection of the fiber of the probe.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a laser medical device using a probe having a fiber.

[0002]

2. Description of the Related Art Carbon dioxide laser light has been said to be useful for cutting and evaporating biological soft tissue, but since a fiber capable of guiding carbon dioxide laser light has not been developed, it is used in the articulated mirror system. Often
Its operability is difficult, and therefore it has not been widely used in actual clinical practice.

However, due to the recent development of fibers made of silver halide materials, they have begun to spread gradually. FIG. 2 shows the entire laser knife device and probe. In the figure, 1 is a laser knife device, 2 is a probe, and 3 is a foot SW. The laser knife device 1 and the probe 2 are configured as shown in FIG. That is, the laser knife device 1 includes a high-voltage power supply 7, a carbon dioxide gas laser oscillation tube 4 that oscillates by receiving high-voltage power, and a beam shutter 8 arranged in the optical path of the laser light 10 from the carbon dioxide gas laser oscillation tube 4.
A condenser lens 15 arranged on the open road of the beam shutter 8, a power sensor 11 for receiving the laser light 10 reflected by the beam shutter 8, and an electric signal proportional to the device of the laser light 10 by the power sensor 11. It has a control unit 12 for inputting 14 and a display unit 13. In addition,
At both ends of the carbon dioxide laser oscillation tube 4, a total reflection mirror 5 and a partially transmitting output reflection mirror 6 are provided, and the beam shutter 8 is operated by a rotary solenoid 9. Then, the connecting portion 20 of the probe 2 is connected to the connecting portion 16 of the laser scalpel device 1, so that the laser light 10 having passed through the condenser lens 15 is applied to the end portion of the fiber 21 of the probe 2. It has become.

In this structure, the laser beam 10 obtained by the carbon dioxide laser oscillator tube 4 is supplied to the fiber 21 of the probe 2.
Then, the control unit 12 receives the electric signal 14 from the power sensor 11 and controls the high-voltage power supply 7 in accordance with the light amount of the laser light 10.

[0005]

By the way, in the carbon dioxide gas laser waveguide structure using the fibers of the silver halide material, the probes having different lengths are used because the attenuation factor is larger than that of general fibers such as quartz. The amount of light emitted from the tip changes each time, and in order to perform optimal irradiation for treatment, it is necessary to calculate the attenuation rate for each fiber and calculate the amount of laser light on the incident side necessary to obtain the amount of light emitted from the desired tip. Yes, it was extremely complicated. Further, in the above-mentioned conventional example, the laser beam can be corrected on the side of the laser scalpel, but when a probe having fibers having different laser beam transmittances is connected, the laser emission amount of the probe cannot be controlled.

The present invention relates to a laser medical device that is controlled and corrected so that the amount of light emitted from the tip matches the set value when various probes having different transmittances used in actual clinical practice are attached to the laser scalpel device. It is intended to provide the probe.

[0007]

In order to solve the above-mentioned problems, the present invention stores an electrically writable and readable memory in a connecting portion of a probe with a laser generator, and the memory is preliminarily permeated by the probe. When the probe is connected to the laser generator by writing the rate and the like, the laser generator reads the memory and controls the laser oscillation tube so that the set emission amount of the probe is obtained.

[0008]

According to the present invention, in the above structure, when the probe is connected to the laser generator, the laser generator reads the transmittance of the probe previously written in the memory and the output of the probe is set. The output of the laser oscillation tube to obtain the value is calculated, the output of the laser oscillation tube is feedback-controlled, and the output of the probe is corrected and controlled to a desired value.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The same functional units as those shown as the conventional example will be described using the same reference numerals.

[0010] Figure 1 is a block diagram of a laser knife device 1 and the probe 2 of an embodiment of the present invention, 0.03 to when explaining the configuration and operation, CO _2, N _2, Xe, gas mixture of He A high voltage is applied from a high voltage power supply 7 to the carbon dioxide gas laser oscillation tube 4 sealed at 0.04 atm to oscillate the carbon dioxide gas laser oscillation tube 4 and total reflection mirrors 5 arranged at both ends of the carbon dioxide gas laser oscillation tube 4. The laser beam is converged by the output reflecting mirror 6 which is partially transmitted.

The laser light 10 emitted from the output reflecting mirror 6 is reflected by the reflecting portion of the beam shutter 8 to change its direction and enter the power sensor 11. The power sensor 11 generates an electric signal 14 proportional to the amount of incident laser light 10, and the electric signal 14 is input to the control unit 12.

A rotary solenoid 9 for rotation is attached to the beam shutter 8, and normally the laser beam 1 is used.
The beam shutter 8 is attached at a position where it reflects 0 and enters the power sensor 11, but when the foot SW 3 is turned on and the laser beam 10 is emitted, the rotary solenoid 9 rotates and the beam shutter 10 passes through the beam shutter. 8 is designed to be retracted, so the laser light 10
Is collected at the end face position of the fiber 21 when the connecting portion 20 of the probe 2 is connected via the condenser lens 15.

When the connecting portion 20 of the probe 2 is inserted into the probe connecting portion 16 of the laser knife device 1, the signal terminal 22 of the probe 2 is connected to the signal connector 17 of the probe connecting portion 16 of the laser knife device 1. When the power is turned on in this state, the control unit 12 of the laser scalpel device 1 reads the content of the non-volatile memory 23 stored in the probe 2 via the signal terminal 22 of the probe connection unit 16, and the laser light 10 of the fiber 21 is read. Capture the transmittance data of.

The control unit 12 of the laser scalpel device 1 outputs the output electric signal 14 of the power sensor 11 for the output of the tip of the probe 2 to reach the value set by the display operation unit 13 based on the acquired transmittance data. By calculating and changing the output current of the high-voltage power supply 7, the output of the laser oscillation tube 4 is changed, and control is performed so that the value of the output electric signal 14 of the power sensor 11 matches the calculated value. Therefore, the laser emission amount of the probe 2 is automatically corrected to the set value.

When the power is turned on without inserting the connecting portion 20 of the probe 2 into the probe connecting portion 16 of the laser scalpel device 1, the controller 12 of the laser scalpel device 1 has the contents of the non-volatile memory 23 stored in the probe. Since it cannot be read, it can be detected that the connecting portion 20 of the probe 2 is not inserted in the probe connecting portion 16 of the laser scalpel device 1, so that the operation of the beam shutter 8 can be prohibited even if the foot SW3 is turned on. Because you can
It is extremely safe.

In the above-mentioned embodiment, only the transmittance data of the fiber 21 is written in the non-volatile memory 23 stored in the connecting portion 20 of the probe 2.
For example, usage time for managing the life of the probe 2,
It is also possible and useful to write a cumulative value such as the energy amount of the incident laser. Further, in the embodiment, the laser knife device is taken as an example, but other laser medical equipment may be used.

[0017]

As is clear from the description of the above embodiment,
According to the present invention, the content of the memory in the probe to which the control unit of the laser scalpel device is connected, that is, the transmittance of the laser light of the fiber, etc. is read, and the output of the probe is automatically corrected and controlled so that it becomes a set value. It is possible to provide a laser medical device and its probe that can automatically obtain an appropriate laser beam emission amount when a probe of various lengths is attached to a laser scalpel device in actual clinical practice.

[Brief description of drawings]

FIG. 1 is a block diagram of a laser knife device and a probe according to an embodiment of the present invention.

[Fig. 2] Overall view of laser scalpel device and probe

FIG. 3 is a block diagram of a conventional laser device and probe.

[Explanation of symbols]

 1 Laser knife device 2 Probe 3 Foot SW 4 Carbon dioxide laser oscillator tube 5 Total reflection mirror 6 Output reflection mirror 7 High-voltage power supply 8 Beam shutter 9 Rotary solenoid 10 Laser light 11 Power sensor 12 Control unit 13 Display operation unit 14 Electric signal 15 Focusing Lens 16 Laser knife device side connection 17 Signal connector 20 Probe side connection 21 Fiber 22 Signal terminal 23 Non-volatile memory

Claims (2)

[Claims] 1. A laser oscillation tube, a high-voltage power supply for driving the laser oscillation tube, a control section for controlling at least the high-voltage power supply, and a connection section for connecting a probe for laser light guide. The laser medical device is characterized in that the connection part has a reading means of a memory stored in the probe, and the laser oscillation tube output is controlled and corrected so that the probe output becomes a set value according to the contents of the memory. 2. A silver halide fiber for guiding a carbon dioxide laser, an electrically writable and readable non-volatile memory, and a laser light incident end of the fiber is held and fixed for connection to a laser generator. And a connection terminal, the connection portion includes a signal terminal for writing and reading the memory, and the laser light transmittance data of the fiber written in the nonvolatile memory is transmitted from the signal terminal to the laser oscillation device. A probe for a laser medical device characterized by being capable of outputting to.