JP2579650B2 - Internal laser light irradiation device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-vivo laser light irradiation device for irradiating a living tissue in a body cavity with a laser beam for treatment.

[Prior Art] In recent years, a method (hyperthermia) of treating a tumor site while keeping it heated at about 42 to 43 ° C. has been actively used. Various heating methods are also conceivable for this method. A method of irradiating a laser beam with a laser probe is one of them. The amount of heating in the heating method using the laser beam is controlled by the operator himself adjusting the laser beam emission output of the laser generator based on temperature information from a temperature sensor provided near the emission tip of the laser probe. It is possible.

[Problems to be Solved by the Invention] When the hyperthermia treatment method using laser light is applied to an affected part in a body cavity, for example, a laser probe is introduced into the body cavity and the emission tip of the laser probe is continuously directed to the affected part. There must be. Moreover, maintaining this state for 20 to 30 minutes requires a great deal of labor and pain for the operator and the patient. Therefore, a system that can reduce the burden on the operator and the patient is desired.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to allow a laser light emitting device to be placed inside a body and to supply electric power from a power supply device installed outside the body by non-wireless transmission means such as electromagnetic. An object of the present invention is to provide an in-vivo laser light irradiation device that can transmit light.

[Means and Actions for Solving the Problems] In order to solve the above problems, a laser irradiation device of the present invention is installed in a body and irradiates a laser beam to an affected part in the body, and the laser device is installed. A power receiving device that supplies power to a laser device that is also installed in the body, and an external power supply device that is installed outside the body facing the power receiving device and transmits power to the power receiving device by a non-wired power transmission unit. It is an internal laser light irradiation device provided.

Therefore, according to this internal laser light irradiation device,
A laser device that emits laser light toward an affected part in a body cavity can be placed inside the body, and can be transmitted from a power supply device installed outside the body by non-wired transmission means such as electromagnetic waves. For this reason, no burden is imposed on the operator and the patient even when the laser light is continuously irradiated for a long time.

Embodiment FIG. 1 and FIG. 2 show a first embodiment of the present invention. This embodiment constitutes an in-vivo laser thermistor for heating and treating a tumor in a body cavity. FIG. 1 shows a conceptual configuration including an in-vivo device 1 and an extracorporeal device 2. In FIG. 2, a laser device 6 including a semiconductor laser 4 and a laser drive circuit 5 is incorporated in a case 3 of the in-vivo device 1. Furthermore, the case 3 of the in-vivo device 1
Is provided with a power receiving device 8 including a dielectric coil 7. Both ends of the dielectric coil 7 are connected to the laser drive circuit 5. The in-vivo device 1 has a fixing needle 8 perforated at the peripheral edge of the front surface, and can be fixed at a predetermined position by piercing the needle 8 into a wall portion 10 in the body cavity 9 as shown in FIG. It has become.

On the other hand, the extracorporeal device 2 has an induction coil 12 provided in a case 11 thereof, and an AC power supply 13 is connected to the induction coil 12 to constitute an external power supply device 14. By placing the in-vivo device 1 and the extracorporeal device 2 facing each other, the coils 7 and 12 have a positional relationship of causing electromagnetic induction, and constitute a non-wired power transmission unit that transmits power by electromagnetic induction. .

Next, the operation of the above-described in-vivo laser thermistor device will be described. First, the in-vivo device 1 is introduced into the body cavity 9 using an endoscope or the like, and the fixing needle 8 is pierced and fixed to the wall portion 10 of the body cavity 9 toward the affected part 20 having a tumor. Thus, the emission end of the laser device 6 faces the affected part 20.

Further, the extracorporeal device 2 is installed so as to face the in-vivo device 1. In this case, the centers of the induction coils 7 and 12 are made to match and approach each other as close as possible.

Therefore, the AC power supply 13 of the extracorporeal device 2
To supply an AC current to drive the external power supply device 14. Thus, an alternating magnetic flux is generated in the induction coil 12, and the alternating magnetic flux passes through the center of the induction coil 7 in the in-vivo device 1 and causes the induction coil 7 to generate an induced electromotive force. The power generated in the induction coil 7 is controlled through the laser drive circuit 5 and applied to the semiconductor laser 4 of the laser device 6.

When drive power is applied to the laser device 6, the semiconductor laser 4 emits a laser beam, oscillates, and causes an affected part having a tumor.
Irradiate towards 20. This irradiation heats the affected part 20 to perform treatment. It is preferable to provide a temperature sensor (not shown) in the in-vivo device 1, detect the temperature of the affected area 20, control the emission output by the laser drive circuit 5 based on this temperature information, and maintain the output at a predetermined temperature.

Since the in-vivo device 1 is placed inside the body, it is not necessary to keep the emission tip directed toward the affected part in a predetermined direction while inserting the laser probe or the like into the body cavity. Even if irradiation is continued for a long time, the burden on the operator and the patient can be reduced.

FIG. 3 shows a second embodiment of the present invention. In this embodiment, in order to supply power to the in-vivo device 1 using electromagnetic waves such as radio waves, the in-vivo device 1 is provided with an in-vivo antenna 31, and the extracorporeal device 2 is provided with an extracorporeal antenna 32. Antenna 32 is installed opposite, and electromagnetic waves such as radio waves are sent from the external antenna 32 to the internal antenna 31,
Power is supplied in a non-wired manner.

FIG. 4 shows a third embodiment of the present invention. In this embodiment, a light receiving chip made of ceramic metal or the like is provided on a wall portion 10 of a body cavity 9 facing an emission end of a laser device 6 of an in-vivo device 1.
The light receiving chip 35 was irradiated with laser light. If the affected part 20 is heated indirectly by irradiating the light receiving chip 35 with the laser beam in this way, the heating treatment can be accurately performed without a temperature change.

The present invention is not limited to the above embodiment.

[Effects of the Invention] As described above, the in-vivo laser light irradiation device of the present invention can place a laser device for irradiating a laser beam on a part inside the body inside the body, and perform non-wired transmission by electromagnetic or the like from a power supply device installed outside the body. It can be transmitted by means. For this reason, no burden is imposed on the operator and the patient even when the laser light is continuously irradiated for a long time.

[Brief description of the drawings]

FIG. 1 is a schematic structural view showing a first embodiment of the present invention, FIG. 2 is a cross-sectional view of the first embodiment in a specific use state, and FIG. FIG. 4 is a schematic structural view showing a second embodiment, and FIG. 4 is a sectional view of a use state of the third embodiment of the present invention. DESCRIPTION OF SYMBOLS 1 ... Internal device, 2 ... External device, 4 ... Semiconductor laser, 6 ... Laser device, 7 ... Dielectric coil, 9 ... Body cavity, 12 ... Dielectric coil, 14 ... External power supply device, 31 ……
Internal antenna, 32 ... External antenna.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Fumiaki Ishii 2-43-2 Hatagaya, Shibuya-ku, Tokyo O-limpus Optical Industry Co., Ltd. (72) Inventor Koichiro Ishihara 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside the Olympus Optical Co., Ltd. (72) Inventor Hiroki Hibino 2-43-2, Hatagaya, Shibuya-ku, Tokyo Inside the Olympus Optical Co., Ltd. (72) Yutaka Oshima 2-43-2, Hatagaya, Shibuya-ku, Tokyo Inside the Olympus Optical Co., Ltd. (72) Inventor Masaaki Hayashi 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside the Olympus Optical Co., Ltd.

Claims (1)

(57) [Claims] 1. A laser device which is installed in a body and irradiates a laser beam to an affected part in the body, a power receiving device which is also installed in the body where the laser device is installed and supplies power of the laser device, and a power receiving device And an external power supply device that is installed outside the body in opposition to the above and transmits power to the power receiving device by a non-wired power transmission unit.