JPS6129738B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a laser scalpel device for cutting or incising an affected area by irradiating a laser beam onto the affected area while observing the affected area.

Traditionally, in dentistry and oral surgery, the surgeon operates the laser handpiece so that the laser beam is irradiated to the affected area with the desired spot diameter while observing the area to be irradiated with the laser beam using an oral mirror. The affected area was cut or incised. However, when starting to cut or incise the affected area, the surgeon must operate the laser handpiece by intuition so that the laser beam is irradiated accurately onto the affected area and the spot diameter of the laser beam irradiated onto the affected area is appropriate. This has the drawback of cutting or incising oral cavity parts that are not related to the treatment. In addition, if the laser beam is directly irradiated onto the dental mirror, the laser beam reflected by the dental mirror may cut or incise areas of the oral cavity that are completely unrelated to the treatment, or may damage the surgeon's eyes. It was hot.

In order to eliminate the drawbacks of the conventional example, the present invention aims to cut the affected area by irradiating the affected area with laser light while observing the affected area from above the irradiation optical axis of the laser beam at any time. Alternatively, a laser scalpel device for making an incision is provided. Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows the configuration of an embodiment of the present invention,
FIG. 2 shows a specific example of a laser handpiece according to an embodiment of the present invention, in which 1 emits visible light for guiding from a laser emitting device 2 or a laser beam for guiding with a very low output. , a control switch for selectively emitting or blocking high output therapeutic laser light, and 3 a glass fiber for laser light transmission installed inside the grip case 4 of the laser handpiece. A light receiving end face (not shown) of the glass fiber 3 is connected to the laser emitting device 2, and an emitting end face 3a (see FIG. 2) of the glass fiber 3 is installed at the tip of the gripping case 4. Reference numeral 5 denotes a glass fiber for image transmission mounted inside the gripping case 4 in parallel with the glass fiber 3, and the image forming end surface 5 of this glass fiber 5
a (see FIG. 2) is installed at the tip of the gripping case 4, and the image receiving end surface 5b of the glass fiber 5 is located on the optical axis of the magnifying lens 6, transmitting visible light and transmitting laser light. It is connected to an eyepiece window 8 in which a protective filter 7 is arranged to limit or block the image. Reference numeral 9 denotes a head case of the laser handpiece that is slidably attached to the tip of the grip case 4 by a set screw 10 inserted through the guide groove 9a and screwed to the tip of the grip case 4. It is bent into the shape of . 11 is a reflecting mirror installed in the refracting part of the head case 9 (see Fig. 2);
12 is a convex lens installed in the opening at the tip of the head case 9 (see Figure 2), and 13 is a swingable half mirror whose lower end is pivotally supported by the head case 9 (see Figure 2). When the half mirror 13 enters the optical path of the laser beam irradiated from the irradiation end surface 3a of the glass fiber 3 toward the reflecting mirror 11 and is installed obliquely, the half mirror 13 will move from the irradiation end surface 3a of the glass fiber 3 to the reflecting mirror 11. The light directed toward the glass fiber 3 is transmitted therethrough, and the light directed toward the irradiation end surface 3a of the glass fiber 3 from the reflecting mirror 11 is reflected. 14
is a reflecting mirror (see FIG. 2) that further reflects the light reflected by the half mirror 13 toward the imaging end surface 5a of the glass fiber 5; End face 5a
The optical path length up to this point is equal to the optical path length from the half mirror 13 to the irradiation end surface 3a of the glass fiber 3. 15 is a wire connecting the control switch 1 and the half mirror 13;
is driven by the control switch 1 and is positioned obliquely on the optical path of the laser beam irradiated from the irradiation end face 3a of the glass fiber 3 when the laser beam for treatment is emitted from the laser emitting device 2. The half mirror 13 is moved away from the optical path of the laser beam (as shown by the dotted line in FIG. 2).

In this embodiment configured in this way, when the therapeutic laser beam is not emitted from the laser emitting device, the half mirror 13 is positioned obliquely on the optical path of the laser beam irradiated from the irradiation end surface 3a of the glass fiber 3. (shown in solid line in Figure 2). Therefore, the image of the affected area around the focal point F illuminated from on or around the irradiation optical axis of the laser beam is transmitted through the lens 12 while being refracted, and is reflected by the reflecting mirror 11, half mirror 13, and reflecting mirror 14. After being reflected sequentially, the image is formed on the imaging end surface 5a of the glass fiber 5,
b. Further, when the control switch 1 is turned on and the laser emitting device 2 emits the visible light for guiding or the laser light for guiding, the visible light for guiding or the laser light irradiated from the irradiation end face 3a of the glass fiber 3 is emitted. , half mirror 1
3 and is reflected by a reflecting mirror 11, and then focused at a focal point F by a lens 12. Furthermore, when the control switch 1 is turned on and the therapeutic laser beam is emitted from the laser emitting device, the half mirror 13 is retracted from the optical path of the laser beam irradiated from the irradiation end surface 3a of the glass fiber 3. (Illustrated by the dotted line in Figure 2). Therefore, the therapeutic laser beam irradiated from the irradiation end surface 3a of the glass fiber 3 is transmitted to the half mirror 13.
After being reflected by the reflecting mirror 11, it is focused at the focal point F by the lens 12. However, the image from the affected area is half mirror 1
3, and therefore no image is formed on the imaging end surface 5a of the glass fiber 5. Therefore,
The surgeon operates the laser handpiece while
The image of the image-receiving end surface 5b of the glass fiber 5 is observed to find the starting point of cutting or incision in the affected area, and the visible light or laser beam for guiding is irradiated to the starting point of cutting or incision, and a therapeutic laser is emitted. After confirming whether the spot diameter of the light is appropriate or not, while appropriately observing the image of the image receiving end surface 5b of the glass fiber 5, the therapeutic laser beam is intermittently irradiated onto the affected area to cut or cut the affected area. Make an incision. If the spot diameter of the laser beam is not appropriate, loosen the set screw 10 and pull out the head case 9 from the grip case 4 or push it into the grip case 4 to expand or shorten the distance between the lens 12 and the focal point F. , the spot diameter of the laser beam changes. By the way, when a laser beam for treatment is emitted from the laser emitting device 2, in the unlikely event that the half mirror 13 does not retreat from the optical path of the laser beam irradiated from the irradiation end surface 3a of the glass fiber 3, the laser beam is reflected at the affected area. Even if the therapeutic laser beam enters the image-receiving end surface 5b of the glass fiber 5, the transmission of the therapeutic laser beam is restricted or blocked by the protective filter 7, so that it will not harm the eyes.

Incidentally, as shown in FIG. 3, the eyepiece window 8 is attached to a frame 16 shaped like glasses or goggles,
When using the laser handpiece, lower the eyepiece window 8 and place it in front of the operator's eyes [see Figure 3a].
When the laser handpiece is not in use, the eyepiece window 8
It will be easier to use if you raise it and remove it from the operator's eyes (see Figure 3b). Also, eyepiece window 8
As shown in FIG. 4, the patient may be connected to a television camera 17 via an adapter (not shown), and the image of the affected area displayed on a monitor television 18 may be observed.

FIG. 5 shows the configuration of another embodiment of the present invention, in which the same reference numerals as those in FIGS. 1, 2, and 4 indicate the same parts, and 19 indicates the same parts.
This shutoff device 19 is connected to the output end of the control switch 1, the output end of the television camera 17 to which the image receiving end surface 5b of the glass fiber 5 is directly connected, and the input end of the laser emitting device 2, respectively.
When a video signal is input from the television camera 17, the circuit between the control switch 1 and the laser emitting device 2 is cut off to prevent the laser emitting device 2 from emitting therapeutic laser light.

In this embodiment configured in this way, when the laser emitting device 2 does not emit therapeutic laser light, the half mirror 13 is placed obliquely on the optical path of the laser light emitted from the irradiation end surface 3a of the glass fiber 3. Because of this position, the image of the affected area is displayed on the monitor television 18, and when the control switch 1 is turned on and the laser beam for treatment is emitted from the laser emitting device 2, the half mirror 13 is placed in the position of the glass fiber. Since the image of the affected area is no longer displayed on the monitor TV 18, and the laser light reflected from the affected area is no longer incident on the TV camera 17, the TV camera 17 can be prevented from being damaged. However, even though the control switch 1 was turned on to cause the laser emitting device 2 to emit therapeutic laser light, the half mirror 13 was unable to receive the laser light irradiated from the irradiation end surface 3a of the glass fiber 3. When the road is not evacuated, a video signal is input from the television camera 17 to the cutoff device 19, so the circuit between the control switch 1 and the laser emitting device 2 is cut off, and the therapeutic laser beam is not emitted from the laser emitting device 2. Since the radiation is no longer emitted, damage to the television camera 17 can be prevented.

As explained above, according to the present invention, the operator can appropriately observe the image of the image-receiving end surface of the glass fiber to search for the area to be irradiated with the laser beam, and to apply the high-power laser beam to that area. Since the diameter of the spot can be accurately determined, there is an advantage that only the patient to be treated can be accurately cut or incised. In addition, since the inside of the oral cavity can be observed without using an oral dental mirror, it is possible to inadvertently irradiate a laser beam onto the dental mirror, cutting or incising oral cavity parts unrelated to treatment, or causing the operator's injury. This has the advantage of preventing accidents that could damage the eyes. Furthermore, a laser handpiece equipped with a means for illuminating the affected area has the advantage that it can be used in place of an endoscope or a dental mirror, since it allows for direct observation of areas outside the oral cavity that are difficult to receive light and the depths of the affected area.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an embodiment of the present invention, Fig. 2 is a sectional view of a laser handpiece in an embodiment of the present invention, and Figs. 3 and 4 are application examples of an embodiment of the present invention. Block diagram, FIG. 5 is a block diagram of another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Control switch, 2... Laser emitting device, 3, 5... Glass fiber, 3a... Irradiation end face, 5a... Imaging end face, 5b... Image receiving end face, 13
...Half mirror, 15...Wire, 16...
Frame, 17...TV camera, 18...Monitor TV, 19...Shutoff device.

Claims (1)

[Scope of Claims] 1. A gripping case to which a head case with a bent tip is attached to the tip; a light source section having a light source for a therapeutic laser beam and a light source for illuminating the affected area; and one end installed at the tip of the gripping case. and a first light transmission means whose other end is connected to the light source section, and control for selectively emitting one of the therapeutic laser beam and the affected area illumination light from the light source to the first light transmission means. a second light transmission means having one end installed at the tip of the grip case and an eyepiece for image formation connected to the other end; and a first reflection means attached to the refraction part of the head case. , a lens attached to the tip of the head case, which transmits the therapeutic laser beam or the affected area illumination light, and directs the light that passes through the lens from the affected area and enters in the direction of the end surface of the second light transmission means. It consists of a half mirror installed inside the head case and tilted with respect to the optical axis so as to reflect, and the therapeutic laser beam is used to treat the affected area while appropriately observing the image of the affected area formed on the eyepiece. A laser scalpel device characterized by cutting or incision. 2. The laser scalpel device according to claim 1, wherein a second reflecting means is installed on the optical path between the half mirror and the second optical transmission means. 3. The half mirror retreats from the optical path of the therapeutic laser beam when the therapeutic laser beam is emitted from the light source, and moves away from the optical path of the affected area illumination light when the affected area illumination light is emitted from the light source. 2. The laser scalpel device according to claim 1, wherein the position of the laser scalpel device is controlled by the control section so that the laser scalpel device is positioned at . 4. The laser scalpel device according to claim 1, wherein the head case is mounted so as to be movable in the optical axis direction of the first optical transmission means. 5. The laser scalpel device according to claim 1, wherein the eyepiece section is provided with a filter means for attenuating or blocking the therapeutic laser beam. 6. The laser scalpel device according to claim 1, wherein an imaging means is attached to the eyepiece section for displaying an image of the affected area formed thereon on an image receiving means. 7. A patent characterized in that when the image of the affected area is displayed on the image receiving means, the light source section is prevented from emitting the therapeutic laser light by a blocking means, regardless of the control state of the control section. A laser scalpel device according to claim 1.