JP3504070B2 - Equipment for drilling holes in biological tissue - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for making a hole in a film of a biological tissue, for example, a device for making an eyeball film suitable for use when replacing a lens with an artificial one in an operation such as cataract. Generally, it relates to a device for making a hole in a film of biological tissue.

[0002]

2. Description of the Related Art As a method for cataract surgery, a new method of replacing the crystalline lens with an artificial one has been proposed. According to this method, it is necessary to make a small hole (about 1 mm in diameter) cleanly in the crystalline lens film.

The above new surgical methods are as follows: Make a small incision in the cornea with a scalpel. 2. Make the small holes mentioned above in the lens film. 3. Insert the ultrasonically vibrating chip through the small hole, make the lens into a gel, and suck it out by vacuum or the like. 4. Insert artificial lens (liquid) and finish.

[0004]

As described above, in cataract surgery, a small hole is made in the film of the crystalline lens, and the blade used at that time is cylindrical (see 10 in FIG. 2). (Pipe-shaped) blade with a tapered portion 10a at the tip and a blade at the tip 10b.
It is what is called a trepan bar. However, if the trepan bar is pressed against the lens film and rotated, the entire circumference is not always cut, and a part of the trepan bar remains uncut. It is considered that this is because the blade edge does not hit the film at a right angle.

The present invention has been made in view of the above-mentioned circumstances, and suctions the film of the crystalline lens with a vacuum or the like,
Adhere the film of the crystalline lens to the blade of the tip of the trepan bar (after or while adsorbing it) and rotate the trepan bar, so that a small hole can be made in the film of the crystalline lens. Although made for the purpose of the present invention, the present invention is not limited to the film of the lens, the film of the eye tissue, further, it is suitable for use in making a hole in the film of the biological tissue. .

[0006]

[0007]

According to a first aspect of the present invention, there is provided a handpiece having a chuck mechanism capable of detachably and rotatably mounting a trepan bar, and the trepan bar.
The trepan bar includes a tube that is detachably , rotatably , and airtightly attached to a rear end of the trepan bar, and the trepan bar is attached to the chuck mechanism. While pressing the blade at the tip of the bar against the film of living tissue , pass the trepan bar through
Then, air is taken in from the tube, and the trepipa bar is rotated to make a hole in the film of the biological tissue.

According to a second aspect of the present invention, a handpiece having a head portion accommodating a chuck mechanism for detachably and rotatably supporting a trepan bar, and an airtight and detachable detachable head portion. The trepan bar is attached to the chuck mechanism, and the blade portion at the tip of the trepan bar is pressed against the film of the living tissue to inhale from the tube through the trepan bar , The feature is that the bar is rotated to make a hole in the film of the biological tissue.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the handpiece includes a mechanism for applying a rotational force to the chuck mechanism, and the trepan bar is rotated by the rotational force. It is characterized by having done.

The invention of claim 4 is characterized in that, in the invention of claim 1 or 2 , the mechanism for applying the rotational force is a spring means.

According to a fifth aspect of the present invention, in the first or second aspect of the invention, the mechanism that applies the rotational force is a micromotor.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an overall configuration diagram for explaining an embodiment of the present invention. In the figure, reference numeral 1 is a well-known handpiece having a built-in micromotor, and a head portion 2 at the tip thereof. As is well known, a chuck mechanism that is rotatably mounted is incorporated therein, and the trepan bar 10 as described above is detachably mounted to the chuck mechanism. The rotation of the micromotor in the handpiece 1 is controlled by the motor control circuit 3 or the like, and the rotation of the motor is transmitted to the rotatable chuck mechanism via a mandrill or the like to rotate the trepan bar 10. As described above, the trepan bar 10 is pressed against the surface (coating) of the crystalline lens 20 and is rotated, whereby a small hole can be formed in the coating of the crystalline lens 20.

However, as described above, if the tip of the trepan bar 10 is simply pressed against the surface of the crystalline lens 20 and rotated, the whole body is not cut off, but a part thereof remains, and a clean hole is formed. Often unable to. The present invention has been made in order to eliminate the above-mentioned problems, and as shown in FIG. 1, a vacuum tube (for a head portion 2 of a handpiece 1, for example, a lid 4 on an upper portion of the head portion 2) for vacuum ( Silicone tube 5 is provided, and before or during drilling, the vacuum device 6 is operated to make the pressure in the head part 2 a negative pressure, and the surface (film) of the crystalline lens 20 is a blade at the tip of the trepan bar 10. 10b is sucked, and the trepan bar 10 is rotated in that state to rotate the crystalline lens 20.
It is designed to make holes in the film.

As described above, after making a hole in the surface of the crystalline lens 20 and inserting an ultrasonic vibrating chip through the hole and ultrasonically vibrating the chip, the crystalline lens becomes a gel.
This is sucked out by vacuum or the like, but the present apparatus can be made usable even in that case. For example, when the end of the trepan bar 10 is connected to the tube 5 and the vacuum device 6 is actuated, the gelled lens is sucked through the trepan bar 10 and the tube 5, and the gelled lens becomes the gas-liquid separator 7. Are collected in the gas-liquid separator 7.

FIG. 3 is a schematic configuration diagram of an essential part for explaining an example in which the silicon tube 5 is detachably and rotatably attached to the trepan bar 10. In this case, trepan bar 10 is mounted through the head portion 2 to the head portion 2, the trephine end after the bar 10 (the end portion of the blade portion 10b opposite) 10c is the head portion 2
The silicon tube 5 is attached to the protruding portion 10c so as to be detachable, rotatable, and airtight by the joint 30. As is well known, a chuck mechanism 8 is housed in the head portion 2, and the trepan bar 10 is detachably attached to the chuck mechanism 8 and via a mandrill 9 rotated by a micromotor (not shown). Is rotated.

FIG. 4 is an enlarged cross-sectional view for explaining an example of a joint 30 for connecting the trepan bar 10 and the silicon tube 5 in a detachable, rotatable and airtight manner. The joint 30 is a silicon tube. 5, and an O-ring 31 that is in close contact with the outer circumference of the trepan bar 10 is integrally provided inside the trepan bar 10. The trepan bar 10 is rotatable with respect to the O-ring 31. And, as described above, the trepan bar 1 is attached airtightly.
By rotating 0, it is possible to make a hole in the film of the living tissue.

Although an example of rotating the trepan bar 10 using a micromotor has been described above, the trepan bar 10 rotates very slowly and requires a high rotation speed. Therefore, it is possible to rotate the trepan bar 10 by rotating the trepan bar 10 by manually rotating the trepan bar 10 by using a spring and utilizing the restoring force of the spring. The mechanism is not limited to the examples given above, and can be arbitrarily selected and adopted. In the simplest case, the trepan bar 10 is manually rotated with the configuration shown in FIG. It is also possible. Further, the above, the case of making a hole in the film of the lens with the main purpose of using the present invention for the treatment of cataracts, the present invention is not only used for the film of the lens, other, eyeball It can be easily understood that the present invention can be applied to a tissue film, and further to a biological tissue film in general.

[0018]

As is apparent from the above description, according to the present invention, when a hole is formed in a film of a biological tissue, the film can be pressed against the tip of a knife such as a trepan bar over the entire circumference. It is possible to make small holes cleanly in the film of the living tissue.

[Brief description of drawings]

FIG. 1 is a diagram showing an overall configuration for explaining an embodiment of an apparatus for making a hole in a film of a biological tissue according to the present invention.

FIG. 2 is a perspective view showing an example of a blade used for implementing the present invention.

FIG. 3 is a main part configuration diagram for explaining another embodiment of the present invention.

FIG. 4 is a sectional configuration diagram for explaining still another embodiment of the present invention.

[Explanation of symbols]

1 ... Micromotor handpiece, 2 ... Head part, 3 ...
Motor control unit, 4 ... Lid, 5 ... Vacuum tube, 6 ...
Vacuum device, 7 ... Gas-liquid separator, 8 ... Chuck mechanism,
9 ... Mandrill, 10 ... Trepan bar, 20 ... Living tissue, 30 ... Joint, 31 ... O-ring.

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) A61F 9/007-9/013 A61B 17/00-17/92

Claims (5)

(57) [Claims] 1. A handpiece having a chuck mechanism with which a trepan bar can be detachably and rotatably attached , and a handpiece which is detachably and rotatably attached to a rear end of the trepan bar.
Also, the trepan bar comprises an airtightly mounted tube, the trepan bar is mounted on the chuck mechanism, the tube is mounted on the rear end of the trepan bar, and the blade portion at the tip of the trepan bar is formed into a film of biological tissue. While pressing it, inhale from the tube through the trepan bar ,
A device for making a hole in a film of a biological tissue, wherein the trepan bar is rotated to make a hole in the film of the biological tissue. 2. A handpiece having a head portion accommodating a chuck mechanism for movably and rotatably supporting a trepan bar, and a tube hermetically and detachably connected to the head portion. from made, with mounting the trepan bar to said chuck mechanism, by pressing the cutting part of the tip of the trepan bar coating of the biological tissue, said tray
A device for making a hole in a film of a biological tissue, wherein air is sucked from the tube through a pan bar and the trepan bar is rotated to make a hole in the film of the biological tissue. 3. The handpiece includes a mechanism for applying a rotational force to the chuck mechanism, and the trepan bar is rotated by the rotational force.
A device for making a hole in the film of the biological tissue according to 1 or 2 . 4. A hole in the film of the biological tissue according to claim 1 or 2, wherein providing a rotary force mechanism is characterized in that the spring means device. 5. A hole in the film of the biological tissue according to claim 1 or 2, wherein said providing a rotational force mechanism is a micro-motor apparatus.