JP3939953B2 - Laser therapy equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a laser treatment apparatus in which the wavelength of a therapeutic laser beam used for irradiating a diseased site of an eye and treating the diseased site is different from the wavelength of an aiming laser beam for setting a target in the diseased site. Regarding improvements.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, laser treatment apparatuses using a dilaser as an irradiation light source for therapeutic laser light used for irradiating a diseased part of the eye and treating the diseased part are known. In this die laser, therapeutic laser beams having wavelengths of 532 nm, 568 nm, and 647 nm are used. In this conventional laser treatment apparatus, this diseased site is observed using, for example, a slit lamp or a binocular stereomicroscope for surgery. The reflected laser beam reflected from the diseased site during irradiation of the therapeutic laser beam is used. If it enters the eyes of the surgeon, it will hurt the eyes, so a cut filter for cutting the treatment laser light is provided in the slit lamp or binocular stereo microscope for surgery, and the treatment laser light is irradiated during treatment laser light irradiation. The reflected light from the diseased part is cut to protect the surgeon's eyes.
[0003]
[Problems to be solved by the invention]
Recently, however, argon lasers, krypton lasers, and semiconductor lasers are used as irradiation light sources for therapeutic laser light, and laser treatment apparatuses that use these argon lasers, krypton lasers, and semiconductor lasers as irradiation light sources for therapeutic laser light are used. Since the wavelength of the therapeutic laser beam and the wavelength of the aiming laser beam are different, even if the reflected light from the diseased part of the therapeutic laser beam is cut during irradiation of the therapeutic laser beam, the aiming Since the reflected light from the diseased part of the laser beam enters the eye of the surgeon, the treatment coagulation segment and the aiming laser beam appear to overlap during the treatment laser beam irradiation, and the operator sees the coagulation segment during treatment. There is a problem that it is difficult to observe.
[0004]
The present invention has been made in view of the above circumstances, and its object is to irradiate the diseased part of the eye and treat the diseased part with the wavelength of the therapeutic laser beam and the disease. A laser treatment device that allows an operator to easily observe a coagulation spot during treatment of a diseased part during irradiation with a therapeutic laser beam even when the wavelength of the aiming laser beam for setting the target is different Is to provide.
[0005]
[Means for Solving the Problems]
The laser treatment apparatus according to claim 1, wherein the diseased part of the eye is observed with a slit lamp or a surgical microscope provided with a filter that cuts the treatment laser light and transmits the aiming laser light. A laser treatment apparatus for irradiating a treatment laser beam to treat the diseased part ,
Different from the wavelength of the treatment laser beam is capable of emitting an aiming laser beam for determining a target the disease site,
The aiming laser beam is cut in conjunction with the irradiation of the therapeutic laser beam.
[0006]
The laser treatment apparatus according to claim 2, wherein the diseased part of the eye is observed with a slit lamp or a surgical microscope provided with a filter that cuts the treatment laser light and transmits the aiming laser light. A laser treatment apparatus for irradiating a treatment laser beam to treat the diseased part ,
Different from the wavelength of the treatment laser beam is capable of emitting an aiming laser beam for determining a target the disease site,
It has a dimming means for dimming the aiming laser beam in conjunction with the irradiation of the therapeutic laser beam.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is an external view showing an example of a laser treatment apparatus 1A according to the present invention. The laser treatment apparatus 1A contains a diode laser, a krypton laser, and a power supply circuit that constitute a part of the laser irradiation optical system 1 shown in FIG. In FIG. 2, 2 is a slit lamp and 3 is a surgical eye. The laser light irradiation optical system 1 includes a krypton laser 4 as an irradiation light source for therapeutic laser light, a diode laser 5 as an irradiation light source for aiming laser light, a dichroic mirror 6, a condensing lens 7, a light guide optical fiber 8, an eye. It consists of an inner probe 9. Reference numeral 10 denotes a connector.
[0008]
The krypton laser 4 is a treatment laser beam for green (can emit any light with a G wavelength of 521 nm or 531 nm), a treatment laser beam for yellow (can emit any light with a Y wavelength of 568 nm or 575 nm), red It is possible to emit a therapeutic laser beam (G wavelength 670 nm).
[0009]
The green treatment laser light is used for glaucoma treatment such as photocoagulation of the fundus disease site, laser iridotomy, laser trabeculoplasty, etc. The yellow treatment laser light has a high absorption rate by hemoglobin Therefore, it is effective for the treatment of the retina of the diseased site and the neovascularization of the choroid, and it is suitable for coagulation in the vicinity of the macula because it is less absorbed by xanthophyll. Furthermore, since the transmittance in the eye is larger than that of the green laser treatment light, the diseased part can be treated with a smaller power than the green treatment light. The red therapeutic laser light is suitable for treating the surgical eye 3 with vitreous hemorrhage because it has a low absorption rate by hemoglobin, and since the scattering rate in the eye is small, an operation with a cataract or the like. Suitable for use in eye photocoagulation.
[0010]
The diode laser 5 can emit red aiming laser light, and its oscillation wavelength is 670 nm. The dichroic mirror 6 has an optical characteristic of reflecting the aiming laser beam and transmitting the therapeutic laser beam. The aiming laser beam and the therapeutic laser beam are synthesized and condensed by the condenser lens 7. The light is guided to the intraocular probe 9 through the light guide optical fiber 8 and irradiated to the diseased part of the surgical eye 3.
[0011]
The slit lamp 2 is provided with a filter 10A, and this filter 10A is used to protect the operator's eyes against the reflected light of the therapeutic laser beam. The transmittance characteristics of the filter 10A will be described below. .
Example 1
When simultaneously cutting the reflected light of the red (R) aiming laser light and the green (G) and yellow (Y) therapeutic laser light, the filter 10A having the transmittance characteristics shown in FIG. Is used. In the case of the filter 10A shown in FIG. 3A, the transmittance below G (wavelength 532 nm) is almost 100%, and the transmittance in the range from G (wavelength 532 nm) to Y (wavelength 568 nm) is almost 0%. , The transmittance from a wavelength larger than Y (wavelength 568 nm) to less than R (wavelength 670 nm) is almost 100%, and the transmittance above R (wavelength 670 nm) is almost 0%.
[0012]
When the filter 10A is configured in this manner, the G and Y treatment laser light and the aiming laser light, which are laser reflected light from the diseased part, can be cut at the same time. Observation becomes easy.
[0013]
When simultaneously cutting red (wavelength 647 nm) therapeutic laser light and aiming laser light, a filter 10A having transmittance characteristics shown in FIG. 3B is used. In the case of the filter 10A shown in FIG. 3B, the transmittance below R (wavelength 647 nm) is almost 100%, and the transmittance above R (wavelength 647 nm) is almost 0%. Yes.
[0014]
When the filter 10A is configured in this manner, the treatment laser beam for R and the aiming laser beam, which are the laser reflected light from the diseased part, can be cut simultaneously, so that the coagulation lesion during treatment can be observed during the irradiation with the treatment light for laser. It becomes easy.
[0015]
As shown in FIG. 3B, when the wavelength of the laser treatment light and the wavelength of the aiming laser light are close to each other, the filter 10A can be easily manufactured. Thus, when the wavelength of the laser treatment light and the wavelength of the aiming laser light are far from each other, the laser treatment light can be easily observed during irradiation of the laser treatment light. Since it is necessary to provide a wavelength band with good transmittance between the wavelength and the wavelength of the aiming laser beam, the manufacture of the filter 10A is troublesome, and there is a demerit that increases the cost.
[0016]
(Example 2)
A filter 10A having transmittance characteristics shown in FIG. 4 is used to simultaneously cut the reflected light of the red (R) aiming laser light and the green (G) and yellow (Y) therapeutic laser lights. In the case of the filter 10A shown in FIG. 4, the transmittance in the range from G (wavelength 532 nm) to Y (wavelength 568 nm) is approximately 0%, and the remaining transmittance is approximately 100%.
[0017]
With this configuration, the reflected light of the aiming laser beam from the diseased part is transmitted through the filter 10A and guided to the eyes of the surgeon. During the laser light irradiation, the mechanical shutter 11 is inserted into the optical path in front of the diode laser 5 shown in FIG.
[0018]
As described above, when the mechanical shutter 11 is inserted into the optical path of the diode laser 5 during the irradiation of the therapeutic laser beams for G and Y, the laser for the laser can be obtained without elaborating the transmittance characteristics of the filter 10A. It is possible to facilitate observation of a coagulation spot during treatment during irradiation with therapeutic light. However, since the mechanical control mechanism for inserting / removing the mechanical shutter 11 to / from the optical path has to be provided, the configuration becomes complicated.
[0019]
Note that in the case of simultaneously cutting red (R wavelength: 647 nm) therapeutic laser light and aiming laser light, a filter 10A having transmittance characteristics shown in FIG. 3B may be used. In this case, the aiming laser beam is cut by the mechanical shutter 11 simultaneously with the irradiation of the therapeutic laser beam having the R wavelength.
[0020]
Therefore, instead of providing the mechanical shutter 11, the diode laser 5 is electrically turned off during irradiation of each treatment laser beam.
[0021]
That is, the switch 12 and the drive circuit 13 are provided, and the diode laser 5 is turned off by controlling the drive circuit 13 with the switch 12.
[0022]
With this configuration, the aiming laser beam can be cut during the irradiation of the therapeutic laser beam without providing the mechanical shutter 11, so that the configuration is not complicated and the cost of the filter is suppressed. On the other hand, it is possible to facilitate the observation of the coagulation site during treatment during irradiation with the therapeutic laser beam.
[0023]
Although the aiming laser beam is cut during the irradiation of the therapeutic laser beam, the aiming laser beam is being emitted during the irradiation of the therapeutic laser beam by operating the switch 12 separately from the light amount adjustment knob 12A shown in FIG. The light may be dimmed.
[0024]
The switch 12 may be configured to be dimmed or cut in conjunction with the irradiation of the therapeutic laser beam.
[0025]
【The invention's effect】
According to the present invention, when the wavelength of the therapeutic laser beam used to treat the diseased part by irradiating the diseased part of the eye is different from the wavelength of the aiming laser light for setting a target at the diseased part Even so, the surgeon can easily observe the coagulation spot at the time of treatment of the diseased part during irradiation with the therapeutic laser beam.
[Brief description of the drawings]
FIG. 1 is an external view of a laser treatment apparatus according to the present invention.
FIG. 2 is a diagram showing an example of an optical system of a laser treatment apparatus according to the present invention.
3 is an explanatory diagram showing an example of the transmittance characteristics of the filter shown in FIG. 1, wherein (A) is an explanatory diagram showing the transmittance characteristics when the wavelengths of the therapeutic laser light are green and yellow. FIG. FIG. 6B is an explanatory diagram showing transmittance characteristics when the wavelength of the therapeutic laser beam is red.
FIG. 4 is an explanatory diagram showing another example of the transmittance characteristic of the filter shown in FIG. 1;
FIG. 5 is a front view of the laser treatment apparatus shown in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Laser irradiation optical system 3 ... Surgical eye 4 ... Krypton laser 5 ... Diode laser

Claims (2)

The diseased part of the eye is observed with a slit lamp or a surgical microscope provided with a filter that cuts off the therapeutic laser light and transmits the aiming laser light, and the diseased part is irradiated with the therapeutic laser light. A laser treatment device for treating
Different from the wavelength of the treatment laser beam is capable of emitting an aiming laser beam for determining a target the disease site,
A laser treatment apparatus, wherein the aiming laser light is cut in conjunction with the irradiation of the treatment laser light. The diseased part of the eye is observed with a slit lamp or a surgical microscope provided with a filter that cuts off the therapeutic laser light and transmits the aiming laser light, and the diseased part is irradiated with the therapeutic laser light. A laser treatment device for treating
Different from the wavelength of the treatment laser beam is capable of emitting an aiming laser beam for determining a target the disease site,
A laser treatment apparatus comprising: a dimming means for dimming the aiming laser light in conjunction with the irradiation of the treatment laser light.

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