JPS61206436A - Laser knife apparatus - 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 a. Technical Field The present invention is directed to the treatment of diseased tissue by bringing the tip of a rod member that irradiates a power laser beam into contact with the diseased tissue.
A contact-type laser scalpel device that allows hard incision, or
The laser beam emitted from the tip of the transmission fiber is focused on the affected tissue using a condensing lens to coagulate the affected tissue.
Regarding a non-contact laser scalpel device that enables incisions,
In particular, it is possible to use protection pipes for transmission fibers having various diameters such as small and large diameters, and it is possible to perform highly accurate optical axis alignment between the transmission fiber and the rod member or condensing lens. Regarding a laser scalpel device.

b. Prior art and its problems The exit end of a protection pipe into which a power laser beam transmission fiber is inserted is optically connected to a transparent rod member, and the tip of the rod member is brought into contact with the affected tissue. Surgical therapy that uses laser irradiation to incise and coagulate the affected tissue has already been put into practical use.

In addition, the exit end of the protection pipe into which the power laser beam transmission fiber is inserted is optically connected to a condensing lens, and the laser beam emitted from the tip of the transmission fiber is directed to the affected area using the condensing lens. Surgical therapy in which light is focused on tissue to incise and coagulate the affected tissue has already been put into practical use.

Generally, the rod member or condensing lens is fixed to the tip of a handpiece-shaped grip, and the protection pipe is detachably attached to the rear end of the grip. The power laser light transmission fiber used is one that is used for general medical treatment.

The outer diameter of this protective pipe is determined by the amount of air sent through the gap between the transmission fiber and the protective pipe.

For small diameters, φ2 mm is used, and for large diameters that require a large amount of air supply, φ2.5 mm is used.

On the other hand, the rod member or condenser lens has a limited incident diameter, and considering the spread angle of the laser beam emitted from the transmission fiber, it is difficult to protect the rod member or condenser lens. The degree of optical axis alignment in optical coupling with the transmission fiber inserted into the pipe must be made more stringent.

If the optical axis is misaligned, the power laser light may leak to the outside, leading to thermal troubles due to the temperature rise of the optical coupling part, or the laser light may not be effectively transmitted to the rod member or condensing lens. An interlayer etc. that is not formed occurs, and therefore,
The insertion diameter of the grip part is set to φ2 depending on the outer diameter of the above protection pipe.
1 and φ2.5 mm, resulting in high costs.

C1 Purpose The present invention was made in order to eliminate the above-mentioned interlayers, and it is possible to use protective pipes with various diameters such as general small diameter and large diameter, and to make it possible to use high-precision protection pipes. It is an object of the present invention to provide a laser scalpel device in which optical axis alignment is ensured.

d. Structure of the Embodiment An embodiment of the present invention will be described below with reference to the five drawings. still,
In this embodiment, a contact type laser scalpel device using a rod member will be described as an example.

FIG. 1 is an external view showing one embodiment of the present invention, in which a conical rod member 3 is attached to the tip of the gripping tube 1 via a fixing fitting 2, and the rear end of the gripping tube 1 is A protective pipe 4 through which the transmission fiber is inserted and with a certain gap for air supply between it and the transmission fiber is attached via a fixture 5, and the holding tube l A Y4 straight ring 6 is attached to the tip of the Y4 ring 6 so as to be able to rotate once.

Next, the internal structure of the above embodiment will be explained in more detail with reference to FIG. 2. In the axial direction of the grip cylinder 1,
Through hole 7 (φ2, 5
mm), and the tip of the grip tube 1 has a smaller diameter than the body, and the small diameter tip has holes spaced at equal intervals around the axis as shown in Figures 3 and 4. As shown in FIG. 2, three conical holes 9 are drilled at equal intervals in the axial direction, for a total of six conical holes 9.
is inserted. In addition, there are two locations in the axial direction.

This is to prevent the tip of the protective pipe 4 from falling.

Further, an adjustment ring 6 whose outer circumferential surface coincides with the outer circumferential surface of the body of the gripping tube 1 is rotatably fitted to the tip, and the m
! ! A ring 10 is fitted and fixed on the inner peripheral surface of the ring 6, and a pit hole 10a into which a part of the ball 8 falls is machined in the ring 10. Indicator 14'' and indicator 1 provided on the outer peripheral surface of gripping tube 1
4, a part of the ball 8" will fall into the pitfall 1.
It is formed so as to fall to 0a.

Therefore, if the ball 8 is in contact with the inner peripheral surface of the ring 10 without falling into the pit 10a.

As shown in FIG. 3, two parts of the ball 8 protrude into the through hole 7, and the optical axis of the small-diameter protection pipe 4 inserted into the through hole 7 and the optical axis of the rod member 3 are connected by the protruding parts. When the protective pipe 4 is held in the same state and the adjustment ring 6 is rotated to make the indicators 14 and 14' match, and a part of the ball 8 falls into the pit 10a, as shown in FIG. As shown, the optical axis of the large-diameter protection pipe 4 inserted into the through hole 7 is held in alignment with the optical axis of the rod member 3 without a part of the ball 8 protruding into the through hole 7. That will happen.

Furthermore, a fixing fitting 2 to which the base end of a conical rod member 3 is fixed is engaged with the tip of the gripping tube 1, and the tip of the protective pipe 4 inserted into the through hole 7 is connected to the rod. It is arranged at a position about lll11 away from the proximal end surface of the member 3.

Further, a fixture 5 is removably fitted to the rear end of the gripping tube 1 via a truncated conical elastic member 12, so that the middle part of the protective pipe 4 is connected to the through hole 7 of the gripping tube 1. The tightening is fixed so that the axes of the

Note that from the tip of the protective pipe 4, air etc. sent from a known air supply mechanism (not shown) is blown out through the above-mentioned gap, and the blown air normally passes through a path (not shown) to the rod member 3. Air is supplied to the tip of the rod member 3 to prevent dirt, etc. from adhering to the tip of the rod member 3.

e. Effect of the embodiment The present invention is constructed as described above, and has a small diameter (φ2
When inserting the protective pipe 4 (mm) into the through hole 7 of the grip tube 1, as shown in FIG. If 14' and 14' are not aligned, a part of the ball 8 will protrude into the through hole 7 due to the inner peripheral surface of the ring 10, and this protrusion will prevent the optical axis of the small-diameter protection pipe 4 from aligning with the rod member. It becomes possible.

Furthermore, when inserting the protective pipe 4 with a large diameter (φ2, 5 + 1!I) into the through hole 7 of the grip tube 1, rotate the adjustment ring 6 as shown in No. 4 Wi, If they match, a part of the ball 8 will fall exactly into the pit hole 10a, so when the large-diameter protection pipe 4 is inserted into the hole 7, the protection pipe 4 will fall into the hole 10a. 7 and is regulated by the diameter of the through hole 7, making it possible to align the optical axis of the large-diameter protective pipe 4 with respect to the rod member 3.

Therefore, in actual operation, depending on whether the indicators 14 and 14' match or not, it is possible to tell from the outside whether the small-diameter protection pipe 4 or the large-diameter protection pipe 4 is being used. Recognize.

In addition, when adjusting the index by rotating the adjustment ring 6, it is also possible to use a click mechanism to make the switching feel clear.

Further, in the above embodiment, since the diameter of the protective pipe 4 is of two types, small diameter and large diameter, the number of pit holes 10a provided in the ring 10 is equal to the number of balls 8, but When the number of types of protective pipes 4 to be used increases to two or more, it becomes necessary to separately provide pit holes 10a with different depths in order to adjust the amount of protrusion of the ball 8 into the through hole 7. Of course. Furthermore, the non-contact type laser scalpel device also has the same configuration as the above embodiment except that what is fixed to the fixture 2 is a condenser lens instead of a rod member.

f. Effects As is clear from the above, even if there are protection pipes of various diameters, the present invention can achieve the desired effect by predetermining the depth of the ball pit according to the diameter of each protection pipe. The optical axis of the transmission fiber inserted into the protection pipe can be easily aligned with the optical axis of the rod member or condensing lens, and the protection pipe into which the transmission fiber is inserted has flexibility. However, since the optical axis is aligned near the rod member or condensing lens, there is no need to worry about axis misalignment, and the structure is simple. The effects are extremely large, such as lower manufacturing costs and improved performance.

[Brief explanation of the drawing]

Fig. 1 is an external view showing an embodiment of the present invention, and Fig. 2 is an external view showing an embodiment of the present invention.
FIGS. 3 and 4 are cross-sectional views showing the internal structure of an embodiment of the present invention, and are vertical side views of the tip of the gripping tube 1. FIG. FIG. 4 shows the case where a large diameter protection pipe is inserted. ! : Grip cylinder 3: Rod member 4: Protective pipe 6: Adjustment ring 8: Ball 9: Conical hole 10: Ring Patented by Akito Asahi Optical Co., Ltd. Representative Tetsuya Matsumoto 2m

Claims (1)

[Claims] 1. A rod member or a condensing lens is fixed to the tip of the grip tube, and a protection pipe into which a power laser beam transmission fiber is inserted is inserted into the grip tube, and the rod member or the condenser lens is fixed to the tip of the grip tube. A laser scalpel device in which a condensing lens and the transmission fiber are optically connected, and a laser beam is irradiated by the optical means to perform incision, coagulation, etc. of affected tissue,
A plurality of balls are embedded in the tip of the grip tube so that a part of the balls protrudes into the through hole through which the protective pipe is inserted, and the light from the rod member or the condensing lens and the transmission fiber is A laser scalpel device characterized in that the amount of protrusion of the ball can be adjusted externally according to the diameter of the protective pipe inserted so that the axes are aligned. 2. Claim 1, characterized in that the balls are aligned around and in the axial direction of the tip of the gripping part.
Laser scalpel device as described in section. 3. Rotatably fit the adjustment ring to the tip of the gripping part,
The laser scalpel according to claim 1, wherein a hole is provided in the inner peripheral surface of the adjustment ring into which a part of the ball falls, and the amount of protrusion of the ball can be adjusted by adjusting the depth of the hole. Device.