JPH0339157A - Operating cutter - Google Patents

Abstract

PURPOSE:To safely and efficiently perform operation by excising an object to be sucked by the side end part forming the opening part of an outer cylinder in the sucking direction thereof. CONSTITUTION:An opening part 18 is formed to the vicinity of the closed leading end of the outer cylinder 12 fixed to a main body at the rear end thereof and a part of an inner cylinder 13 is inserted in the outer cylinder. The rear end of the inner cylinder 12 is connected to a suction apparatus. By the above- mentioned constitution, an object 4 to be sucked is certainly excised by the side end part 40 in the sucking direction of the outer cylinder along the sucking direction shown by an arrow to be efficiently sucked in the sucking direction. Since the opening part 18 always communicates with the interior of the inner cylinder 13, the object 4 to be sucked is not confined or held between the inner cylinder 13 and the outer cylinder 12.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a surgical cutter used in ophthalmic surgeries such as vitrectomy and cataract surgery.

BACKGROUND OF THE INVENTION Conventional surgical cutters have a hollow outer member with a hollow inner member. By reciprocating the inner member relative to the outer member, the object to be sucked, which is sucked through the opening formed in the side circumferential wall of the outer member, is cut off and sucked by rubbing between the outer member and the inside. The tip of the outer material is closed.

The object to be aspirated is removed by such a surgical cutter in a direction opposite to the suction direction, that is, in a direction toward the outer tip of the cutter. And while the inside is moving, there will always be a position where the inside closes the opening of the outside.

Problems to be Solved by the Invention However, as mentioned above, the tip of the outer member is closed, and if the inner member closes the opening of the outer member, the object to be attracted may be placed in the closed space of the outer member. Since it is pressed down, it is easy to cause the cutter to become clogged. For this reason, surgery cannot be performed safely.

Furthermore, since excision and suction are correlated, it is necessary to make the excision direction and the suction direction the same as possible to ensure efficient suction.

Furthermore, if the inner material closes the opening of the outer material, the retina, blood vessels, etc. may be pinched between the inner and outer materials when removing the cutter from the eye or moving the cutter within the eye. There is a risk that you may get stuck.

OBJECT OF THE INVENTION The object of the present invention is to provide a safe and efficient surgical cutter.

SUMMARY OF THE INVENTION The gist of the present invention is a surgical cutter as set forth in the claims.

Means to solve problems Please refer to FIGS. 2 and 3.

The portion for cutting off the object to be aspirated 4 is an end portion 40 on the side in the suction direction that forms the opening 18 of the outer cylinder 12, which is the outer member.

The angle of this end 40 in the suction direction is determined by the angle of the inner cylinder 13 which is an internal member.
Preferably, it is perpendicular to the axis of reciprocating direction.

Preferably, the inner tube 13 also has openings 30 and 70, with corresponding openings 30 and openings 18 of the outer tube 12. The opening 18 of the outer cylinder 12 and the inside of the inner cylinder 13 communicate with each other when the inner cylinder 13 is moving and at rest. The inside of this inner cylinder 13 is a suction passage for the object 4 to be sucked.

Operation The object 4 to be aspirated is reliably cut off at the suction direction side end 40 along the suction direction shown by the arrow in FIG. 3, and then the object 4 to be suctioned is suctioned in the suction direction. Since the opening 18 and the inside of the inner cylinder 13 are always in communication, the object to be sucked 4 can be transferred between the inner cylinder 13 and the outer cylinder 1.
2 or sandwiched between the inner cylinder 13 and the outer cylinder 12.

Example Please refer to FIG.

[Surgical cutter] The surgical cutter 10 includes a main body 11, an outer cylinder 12, and an inner cylinder 13.
, diaphragm 14, piston 15, spring 16,
Air pipe 17, tubes 20, 21. Suction device 22
, a compressor 23. This cutter 10 is used to cut out objects to be aspirated within the eyeball.

[Outer Cylinder and Inner Cylinder] The main body 11 is the part that is held by the operator. The main body 11 has an outer cylinder 1
The rear end of 2 is fixed. As shown in FIG. 2, an opening 18 is formed near the closed end of the outer cylinder 12.

A portion of the inner cylinder 13 is inserted into the outer cylinder 12. The remaining portion of the inner cylinder 13 passes through the piston 15 and the middle member 11a. Although the inner cylinder 13 is fixed to the piston 15,
It is not fixed to the middle member 11a. The rear end of the inner cylinder 13 is connected to a suction device 2 including a vacuum pump etc. via a tube 20.
Connected to 2. The spring 16 pushes the piston 15 toward the diaphragm 14.

The passage 17a is connected to the tube 21 and the air pipe 17. When the compressor 23 is activated, pulses of compressed air are applied to the diaphragm 14 as indicated by the arrows. This diaphragm 14 can move in the direction of the middle member 11a against the force of the spring 16.

When the compressed air pulse is removed, the force of the spring 16 causes the piston to return to its initial position. In this way, the piston 15 and the inner cylinder 13 reciprocate.

The O-ring presser 24 holds down the O-ring 25. Inner cylinder 1
3 and the main body 11 is an O-ring 26.

[Near the tips of the inner cylinder 13 and outer cylinder 12] It is shown enlarged in FIG.

As mentioned above, the outer cylinder 12 is cylindrical and has a tip 12a.
is closed, and an opening 1 is formed in the side wall near the tip 12a.
It has 8. This opening 18 has a triangular shape when viewed in FIG.

On the other hand, the inner cylinder 13 is cylindrical and has an open end 13b forming an opening 70.

The opening 30 of the inner cylinder 13 is rectangular as viewed in FIG. The axial length X of the opening 18 is greater than the axial length Y of the opening 30. Further, the length X is larger than the length Z of the tip portion 13b of the inner cylinder 13.

The opening 18 has an end 40 on the suction direction and an end 4 on the opposite suction direction.
1. The suction direction side end 40 enters at right angles to the axial direction or the direction of reciprocating movement of the inner cylinder. On the other hand, the end 41 on the side opposite to the suction direction is at an acute angle with respect to the axial direction or the direction of reciprocating movement of the inner cylinder. The opening 30 has an end 45 on the side in the suction direction and an end 46 on the side opposite to the suction direction. Both ends 4
5 and 46 are perpendicular to the axial direction.

[Operation 1] We will explain how to actually suction and remove the object to be aspirated 4 inside the eyeball.

The suction device 22 shown in FIG. 1 is operated to remove the suction target 4 shown in FIG.
is sucked through the opening parts 8 and 30. Then, the compressor 23 shown in FIG. 1 is operated to cause the piston 15 to reciprocate.

When the piston 15 is in the initial state shown in FIG.
3 and the outer cylinder 12 are shown in FIG. In this case, the object to be sucked 4 passes through the opening 18 and the opening 30 into the inner cylinder 1.
It gets sucked into 3.

When the piston 15 moves to the right in FIG.
As shown in the figure, the end 46 of the inner cylinder 13 on the side opposite to the suction direction rubs against the end 40 of the outer cylinder 12 on the suction direction, and the object to be sucked 4
Make sure to remove part of the. The excised material passes through the inner tube 13 and is sucked into the suction device 22 shown in FIG.

Since both the suction direction side end portion 40 and the suction direction side end portion 46 are perpendicular to the axial direction, the object to be suctioned can be completely removed without escaping.

At the same time, a portion 4a of the object to be sucked 4 is being sucked into the outer cylinder 12 through the remaining gap in the opening 18.

Next, when the compressor 23 shown in FIG. 1 is stopped, the inner cylinder 13 is pushed back by the force of the spring 16. As a result, as shown in FIG. 4, the opposite end 41 and the inner cylinder 13
The tip portions 13b of the two are rubbed together to cut off a portion 4a.

At this time as well, since the openings 8 and 30 are connected, another portion 4b of the object to be sucked 4 is sucked in.

By repeating such a series of operations, the suctioned portion 4 is removed. During this operation, the object to be aspirated 4 can be sucked into the suction chamber through the opening 18 in preparation for the next resection. The opening 18 is always open when the inner cylinder 13 moves. Moreover, the object to be sucked 4 does not get stuck between the outer cylinder 12 and the inner cylinder 13.

However, the present invention is not limited to the above-described embodiments. For example, if the resection direction is the same as the suction direction side, the shape of the end of the opening on the suction direction side may be either a straight line or a curved line. The shape of the suction direction side end portion may be an acute angle instead of a right angle.

The biasing direction of the spring for moving the inner cylinder may be reversed.

There may be a plurality of openings in the inner cylinder and a plurality of openings in the outer cylinder. For example, as shown in FIG. 5, one opening 18 is provided in the outer cylinder 120, and two openings 30 are provided in the inner cylinder 130. Further openings 90 are also formed between the openings 30.30.

Effects of the Invention According to the invention of claim 1, since the object to be aspirated is resected in the same direction as the suction direction, it can be resected efficiently and clogging can be reduced.

According to the second aspect of the present invention, since the end portion of the outer member in the suction direction is perpendicular or perpendicular to the reciprocating direction of the inner member, it can be reliably rubbed against the inner member and the cutting quality is improved. This prevents objects to be sucked from being caught.

Further, according to the invention of claim 3, both the inner member and the outer member have openings, and both correspond to each other, so that the inside of the inner member and the opening of the outer member can always communicate with each other, and the outer member It is possible to eliminate the unreasonable tension of the suction object due to closing. This prevents surgical errors.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of the surgical cutter of the present invention;
FIGS. 2 to 4 are operational diagrams showing the vicinity of the tips of the inner cylinder and the outer cylinder, and FIG. 5 is a diagram showing another embodiment. Work 2...Inner cylinder 13...Outer cylinder 18...Opening 30...Opening

Claims (3)

[Claims] 1. A hollow inner member is inserted into a hollow outer member that is closed at one end, and by reciprocating the inner member relative to the outer member, the object to be sucked is absorbed by the closed part formed on the side wall of the outer member. A surgical cutter that performs cutting and suction by rubbing an external material and an internal material together, characterized in that the part that excises the object to be aspirated is an end in the suction direction that forms an opening of the external material. 2. The surgical cutter according to claim 1, wherein the angle of the end of the opening in the outer member in the suction direction is perpendicular to the direction of reciprocating movement of the inner member. 3. 3. The surgical cutter according to claim 1, wherein the inner member has an opening, and the opening of the outer member and the inner member communicate with each other both when the inner member is moving and when it is stopped.