JPS62201149A - Laser operation apparatus with microscope - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to improvements in a laser surgical device with a microscope.

[Conventional technology]

Conventionally, as a laser surgical device with a microscope, for example, a first
As shown in the figure, a microscope is often used in which a magnifier and a laser 3 are attached through an objective lens 2 in front of a microscope @ 11, and a mirror 7 is attached to the operator's eye 4 attached to an eyepiece tube 5 from a lamp.
．． 8 within the visual field illumination area formed by the illumination light projected onto the surgical instrument.

The laser beam incident from direction B and the accompanying visible guide light (hereinafter referred to as the beam) pass through a lens 9°lO, change direction at the reflector 11, and are irradiated onto the surgical instrument. Ru. In this case, the limited field illumination MA does not change unless the objective lens is replaced.

As mentioned above, these devices are configured so that the beam irradiation point can be seen within the field of view illumination area, but as the magnification of the microscope increases from low to high, the field of view becomes progressively narrower. 4 by operating the variable power system 12 shown in
In the case of double the field of view α(
The same applies to the shaded area inside the dotted line. ) is the beam irradiation range β
(The same applies below the inner part of the solid line.) It becomes wider, and the operator can feel
Although it is possible to see to the outside of the irradiation range β, Fig. 4 Gi)
(As shown in Figure 1), for example, when the magnification is 10 times, the field of view α becomes equivalent to the irradiation range, and.

At 16x magnification, the field of view α becomes almost half of the irradiation range β, and at 25x magnification, the field of view α becomes a small area in the center of the irradiation range β.1For example, if the objective lens is f = 300, then The field of view becomes about 10st*+ in diameter.

As a result, when observing the surgical instrument with increased magnification of the microscope,
While operating the joystick mechanism, the beam was often lost during a single operation, and the surgeon had to take his eyes off the microscope to look for where the beam was going.

However, irradiating areas other than the 14J irradiation area with laser light is extremely dangerous, not only with CO2 laser light, but also with other less powerful He-No laser lights. In addition, it takes a lot of time to find a beam that has been lost, causing inconveniences such as delaying one surgery, and there is a strong need for countermeasures against this problem.

[Problem that the invention attempts to solve]

This idea was made in view of the actual situation described above.

This method attempts to control the movement of the stick in the joystick mechanism that swings the reflector that guides the laser beam so that when the magnification of the microscope is changed, the irradiation position of the beam is always within the field illumination area. The above objective is achieved by limiting the range of cystic variation by adding an aperture mechanism that changes the degree of aperture in accordance with the magnification of the microscope.

[Means for solving problems]

The present invention is.

a. In a laser surgical device having a reflecting mirror which can be freely swung back and forth or left and right to move the irradiation position of the laser beam and the accompanying guide light by means of a joystick mechanism in front of the objective lens of the microscope.

b. The joystick mechanism is equipped with an aperture mechanism that increases or decreases the moving range of the stick in accordance with the magnification of the microscope.

C. The irradiation position of the laser beam and the guide light is set within the visual field illumination area regardless of the magnification of the microscope R1 boundary. d. The laser surgical device with a microscope is established as its gist.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments with reference to the drawings.

〔Example〕

FIG. 2 is a perspective explanatory view showing a manipulator portion which is a main part of a laser surgical device with a microscope to which the present invention is applied.

First, two lenses 9. which can simultaneously transmit and refract and focus a laser beam, such as a CO2 laser, which is irradiated to the surgical instrument, and an accompanying visible GaP light, such as an H.--No laser beam, are transmitted. 10 are arranged. A Z+ISe type lens is preferably used as the lens. The beam transmitted through the lens 10 is projected onto a reflecting mirror 11, where the reflected beam is irradiated with a surgical instrument F.

The reflecting mirror 11 is placed on a support base 19 and can be rocked back and forth or left and right by a stick of a joystick mechanism. That is, the stick 13 is supported by a support member 14 such as a sphere, and the male-luno, Indian 15 at the tip thereof is equipped with a U-shaped lever 16KVC.
A reflector support 19, which is fixed 18 to the tip of a cantilever 17 which is pivoted to the mirror 6, can be moved back and forth four times.

Further, the U-shaped lever 16 is fixed to an outer cylinder 21 that is rotatably installed on a base 20, and is fixed to the tip of the outer cylinder by swinging the stick 13 from side to side. The reflector support base 19, which is pivoted 23 to the L-shaped member 22, is configured to swing from side to side.

To explain the movement of the stick, shaking the stick 13 up and down causes the reflector support to swing back and forth, causing one reflector to move back and forth by Km.

Further, when the stick 13 is swung left and right, the reflector support base is swung left and right, and one reflecting mirror 11 is swung left and right.

As a result, the beams I and G, which have been condensed as described above, are reflected by the mirror surface of the reflecting mirror 11 to move the irradiation position 1iF to a desired position on the surgical instrument.

The present invention provides field illumination thj!, in which the beam irradiation position always changes regardless of the magnification of the microscope, in the laser surgery apparatus with a microscope as described above. h, an aperture mechanism 2 that increases or decreases the moving range of the stick 13 by adjusting the magnification to the above magnification.
4.

Figures 3 (i) and (ii) are images taken at relatively high magnification (
This shows the difference in the opening/closing degree of the aperture at relatively low magnifications (for example, 25 times) and relatively low magnifications (for example, 4 times).
The movement of the reflector support base 1 is thus restricted to a large extent.
(@2 Figure reference #@) to restrict the movement of the reflected dxt so that the beam irradiation area is within the field of view illumination, while (in the case of the iD diagram, the diameter of the diaphragm 22b is increased, The range of movement of the beam is approximately the same as the field of view.This is because the degree of opening and closing of the aperture is changed in response to changes in the scale of the variable magnification system for microscopic values.

Any conventional mechanical or electrical or electronic interlocking system can be used.

〔Effect of the invention〕

The invention is based on one or more configurations.

The aim is to ensure that the entire range of movement of the beam, that is, the irradiation range, is always within the field illumination area of the microscope.As a result, the operator will not lose sight of the laser beam from the field of view, and the surgery will be faster and faster. This method can be performed safely and is extremely useful especially when applied to organs in which the nervous system is complicated, such as ear surgery and blood vessel suturing.

[Brief explanation of drawings]

Fig. 1 is an overall explanatory diagram showing an example of a laser surgery device with a microscope, Fig. 2 is an explanatory diagram of the main part of the manipulator section in the above device, and Fig. 3 (1) and (11) are illustrations of the stick and aperture mechanism. An explanatory diagram showing the relationship, FIG. 4 (1). (ii) , (iii and (1) are explanatory diagrams showing the relationship between the field of view and the irradiation range of the laser beam, respectively. 1... 81 & mirror, 2... objective lens, 3... manivilator, 4 ... Operator's eyes, 5... Eyepiece tube, 6.
...Illumination lamp, 7.8...Mira, A...Visual illumination area, 9.10...Lens, 11...Reflector, 12.
...variable magnification system of a microscope. 13... So, the stick in the istic mechanism. 14...Supporting member, 15...Goal no, I7to, 1
6... U-shaped fi lever, 17... Cantilever, 18.
··Fixation. 19...Reflector support stand, 20...Base, 21...
Outer cylinder. 22... L-shaped member, 23... Shaft attachment.

Claims (1)

[Claims] In a laser surgery device that has a reflector in front of the objective lens of the microscope that can swing back and forth or left and right to move the irradiation position of the laser beam and accompanying guide light using a joystick mechanism, it follows the magnification of the microscope. The joystick mechanism is equipped with an aperture mechanism that increases or decreases the movement range of the stick, and the irradiation range of the laser beam and guide light is always within the field illumination area regardless of the magnification of the microscope. A laser surgery device with a microscope.