JPH01135368A - Apparatus for laser irradiation - Google Patents

Abstract

PURPOSE:To easily and accurately control a region to be heated with laser, by selecting one of laser generators for treatment with different wavelengths. CONSTITUTION:A laserthermia apparatus 1 includes a main body 2 wherein plural laser generators 3-5 are provided in parallel. The laser generators 3, 4 and 5 radiate He-Ne laser as guide rays, CO2 gas laser for treatment and YAG laser for treatment, respectively. The main body 2 also includes a control device 21 for regulating the laser generators 4 and 5. The control device 21 selects one of the generators 4 and 5 to activate it, on the basis of temperature data sent from temperature sensors 22 and 23.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a laser beam irradiation device that treats living tissue within a body cavity by irradiating it with a laser beam, for example.

[Conventional technology]

A method (hyperthermia) in which the tumor site is heated and maintained at approximately 42 to 43"C (hyperthermia) has become popular in recent years. Various heating methods can be considered for this method. Laser probe One such method is the laser beam irradiation method.The heating range in this laser beam heating method is controlled by adjusting the output output of the laser beam.

[Problems to be Solved by the Invention] However, adjusting the output power of the laser beam by the operator himself in order to control the heating range is cumbersome, and also reduces the time required for one treatment. It usually takes a long time, 20 to 30 minutes, so monitoring requires a lot of effort. In particular, it was difficult to control the heating range (spread, depth, etc.) by laser irradiation.

The present invention has been made in view of the above-mentioned problems, and its object is to provide a laser beam irradiation device that can easily and reliably control the heating range by laser beams.

[Means and effects for solving the problem] In order to solve the above-mentioned problem, the laser irradiation device of the present invention includes at least two types of treatment laser devices having different wavelengths, and the emission of light from each of the treatment laser devices. A treatment laser device having different wavelengths, comprising a transmission optical path for receiving laser light and transmitting it to a treatment laser guide, and a control device for selecting at least one treatment laser device and operating it to emit light. The range of heating by the laser beam is controlled by selecting .

Therefore, the heating range by laser light can be easily and reliably controlled.

[Embodiment] FIG. 1 shows a first embodiment of the present invention. In the figure, reference numeral 1 denotes a laser thermia device, and a plurality of laser devices 3, 4.5 are installed in parallel within the main body 2 of this device. The laser device 3 oscillates a He-Ne laser beam for guiding light. The laser device 4.5 is for treatment, the laser device 4 is a carbon dioxide laser, and the laser device 5 is for treatment.
A YAG laser is used. Laser light emitted from each laser device 3, 4.5 is transmitted to a laser guide of a treatment laser probe 8 through a transmission optical path 7. The transmission optical paths 7 are combined into one light guide path 9 by mirrors 11 and 12, and a connection port 15 is provided at the tip of this light guide path 9 to which a connector 10 of a treatment laser probe 8 is detachably attached. Further, an opening/closing shutter 16 and a condensing lens 17 are provided in the middle of the combined light guide path 9. Furthermore, an aperture 18 and a shutter 19 are installed in the output optical path of the treatment laser devices 4 and 5.

Furthermore, inside the main body 2 of the apparatus, there is a laser device 4 for the above-mentioned treatment.
A control device 21 for operating 5 is installed. This control device 21 receives temperature information from temperature sensors 22 and 23, which will be described later, and selects at least one of the laser devices 4 and 5 for treatment based on this information, and operates the laser devices 4 and 5 for treatment. For example, the shutter 16, aperture 18, or shutter 19 is operated.

The temperature sensors 22 and 23 have temperature sensing portions 22a.

23a is inserted into the tissue of the affected area 24 at a certain distance, and the temperature of that area is individually measured. Note that the temperature sensors 22 and 23 are detachably connected to the control device 21 via a connector 25.

On the other hand, a laser beam emitting tip 8a is provided at the tip of the treatment laser probe 8, and this tip 8a is inserted into the tissue of the affected area 24 to a predetermined depth.

Next, a method of using the above laser beam irradiation device will be explained. First, a laser probe 8 with a laser guide inserted therein is introduced through an insertion channel of an endoscope that has been previously introduced into a body cavity. Then, the guide light laser device 3 is operated to oscillate, and the distal tip 8a of the laser probe 8 is connected to the affected area 2.
4. Irradiate guide light. The tip 8a is inserted to a predetermined depth while positioning the irradiation spot in the desired direction. moreover,
The temperature-sensing parts 22a and 23 of the temperature sensors 22 and 23 are located around this area.
a, and each of its temperature sensing parts 22a.

23a is inserted into the tissue of the affected area 24 at a certain distance. In this way, the temperature sensors 22 and 23 measure the temperatures of different parts A and B individually.

And treatment laser devices 4, 5. The laser beam is emitted by causing at least one of them to oscillate, and is irradiated onto the affected area 24 through the laser guide of the laser probe 8. The affected area 24 is heated by being irradiated with this laser light. In this case, the treatment laser device 4.5 to be used is manually selected according to the degree of invasion of the tumor and used. For example, in the case of a superficial tumor, a carbon dioxide laser device 4 is used, and in the case of a deep tumor, a YAG laser device 5 is used.

Further, the selection of the laser device 4.5 to be used may be changed depending on the temperature measured by the temperature sensor 22.23. For example, the tip 8a of the laser probe 8
The part A that is closer to is larger than the part B that is further away. In some cases, the laser device 5 that oscillates YAG laser light is used, and in the opposite case, the laser device 4 that oscillates carbon dioxide laser light is selected and controlled to be used. Of course, the respective portions A and B are controlled to be maintained within the range of 42 to 43''C.

Alternatively, both of the treatment laser devices 4.5 may be oscillated at the same time, and the respective laser beams may be used in a superimposed manner. In this case, the output of each laser device 3.4 is controlled by its aperture 18 or the like based on the temperature detected by the temperature sensor 22.23.

FIG. 2 shows a second embodiment of the invention. In this embodiment, a semiconductor laser device 31 and an infrared emitting device 32
, and the laser light and infrared rays emitted from these devices 31 and 32 can also be transmitted to the laser probe 8 through the transmission optical path 7. Therefore, by selecting and using at least one of these, the affected area 24 can be treated in a more optimal temperature state.

Furthermore, in this embodiment, the number of temperature sensors 35, 36, 37 is increased, and each of the temperature sensors 35, 36, 37 is provided with a plurality of temperature sensing sections 38, respectively. Further, the temperature sensors 35, 36, and 37 are installed at different intervals from the tip 8a of the laser probe 8 and at equal intervals from each other. By providing many temperature sensors 35, 36, 37 in this way, the temperature can be controlled with higher accuracy.

Further, a removable light emitting device 41 may be provided and the light emitting device 41 may be attached and used as necessary.

[Effects of the Invention] As explained above, the laser irradiation device of the present invention includes at least two types of treatment laser devices having different wavelengths, and a treatment laser that receives laser light emitted from each of the treatment laser devices. It is equipped with a transmission optical path for transmitting data to a guide, and a control device that selects at least one treatment laser device and operates it to emit light, and selects treatment laser devices with different wavelengths to control the heating range by the laser beam. It was designed to be controlled.

Therefore, the heating range by laser light can be easily and reliably controlled.

[Brief explanation of the drawing]

FIG. 1 is a schematic block diagram showing a first embodiment of the present invention, and FIG. 2 is a schematic block diagram showing a second embodiment of the present invention. 1... Laser thermia device, 2... Device body, 4
゜5.31... Laser device, 7... Transmission optical path, 8.
... Laser probe, 9 ... Light guide path, 21 ... Control device, 22°23.35, 36.38 ... Temperature sensor, 24 ... Affected area. Applicant's agent Patent attorney Atsushi Tsuboi

Claims (1)

[Claims] at least two or more types of treatment laser devices having different wavelengths; a transmission optical path for receiving laser light emitted from each of the treatment laser devices and transmitting it to a treatment laser guide;
A laser beam irradiation device comprising: a control device that selects at least one treatment laser device and operates the same to emit light; and a control device that selects treatment laser devices with different wavelengths and controls a heating range by the laser. .