JPH0339155A - Operating cutter - Google Patents

Abstract

PURPOSE:To certainly perform excision and to perform operation safely and efficiently by making the angle of the end part of the opening part of an outer cylinder acute. CONSTITUTION:The rear end of an outer cylinder 12 is fixed to the main body of the part grasped by an operator and an opening part 18 is formed to the closed leading end of the outer cylinder and the angle alpha of the end part 30 of the outer cylinder is made acute. A part of an inner cylinder 13 is inserted in the outer cylinder and the rear end thereof is connected to a suction apparatus through a tube. By the above-mentioned constitution, the object 4 sucked in the opening part can be sharply and certainly excised by the fitting of the end part and the inner cylinder 12.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is a surgical cutter for cutting an object to be removed in ophthalmic surgery such as vitrectomy.

BACKGROUND OF THE INVENTION Conventional surgical cutters have a hollow inner member inserted into a hollow outer member, and the outer member has an opening. By rubbing the tip of the inner member against the side edge of the opening of the outer member, the object to be sucked that has entered the opening is removed.

Problems to be Solved by the Invention In order to reliably cut out the object to be cut, it is necessary that the inner member and the outer member are tightly rubbed together. However, it is very difficult to process and assemble them to make them completely dense. Therefore, it was necessary to forcibly rub the inner member and a part of the side edge of the opening, or to drive the object to be sucked into the gap between the inner member and the side edge, forcibly catch it, and remove it.

As a result, the cutting quality is poor, surgical safety is low, and efficiency is low.

OBJECT OF THE INVENTION The object of the present invention is to provide a surgical cutter that can reliably perform surgery in a safe and efficient manner.

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

Means to solve problems See Figure 2.

The angle α of the end portion 30 of the outer tube 12 as an outer member is an acute angle.

As shown in FIG. 4, both ends 130 and 131 can be made at acute angles.

As shown in FIG. 4, the inner cylinder 13 as an internal member has an opening 200
It is desirable to have

The end portion 30 of the outer cylinder 12 in FIG. 2 has a snug shape. The same applies to the end portions 130 and 131 in FIG.

The object to be sucked 4 sucked into the working opening 18 is connected to the end 30 and the inner cylinder 1.
By grinding the two together, you can cut sharply and reliably.

If the ends 130 and 131 are both made at acute angles as shown in FIG. 4, cutting can be performed by reciprocating motion.

The object to be sucked is always sucked through the opening of the inner cylinder and the opening of the outer cylinder.

By rounding the end 30, even if the end 30 has an acute angle, the eyeball will not be damaged when the outer cylinder 12 is inserted into the eyeball and removed.

The same goes for the ends 130, 131.

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.
, a rear member 14, a piston 15, a spring 16, an air pipe 17, etc. 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. An opening 18 is formed at 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 rear member 14. The inner cylinder 13 is fixed to the piston 15 but not to the rear member 14. A suction device 21 including a vacuum pump etc. is connected to the rear end of the inner cylinder 13 via a tube 20.
It is connected to the.

The rear member 14 is screwed onto the main body 11, and by adjusting the rear member 14, the position of the piston 15 can be adjusted. In other words, the initial position of the inner cylinder 13 can be adjusted.

The spring 16 pushes the piston 15 toward the rear member 14. Compressed air pulses are sent from the drive device 23 to the fist piston 15 via the air pipe 17 and air tube 22, so that the piston 15 can move forward (to the left in Figure 1) against the force of the spring 16. ing. When the compressed air pulse ceases, the force of the spring 16 causes the piston 15 to return to its initial position. In this way, the piston 15 and the inner cylinder 13 reciprocate. This spring 16 is arranged between the O-ring retainer 24 and the piston 15.

The O-ring presser 24 holds down the O-ring 25. A diaphragm 26 is arranged between the piston 15 and the main body 11. An O-ring 27 and a stopper 2 are installed between the rear member 4 and the main body 11 and between the rear member 14 and the piston 15, respectively.
8 is provided.

The diaphragm 26 is a sealing material that prevents compressed air pulses from entering the chamber where the spring 16 is located. The O-ring 25 is a sealing material that prevents the air in the room where the spring 16 is located from flowing into the outer cylinder 12. The O-ring 27 is a sealing material that prevents compressed air pulses from escaping through the gap between the main body 11 and the rear member 14.

[Near the tips of the inner tube 13 and the outer tube 12] As shown in FIGS. 2 and 3, the outer tube 12 and the inner tube 13 are cylindrical.

The distal end portion 50 of the outer cylinder 12 is closed. The end 30 of the opening 18 has an acute angle α with respect to the axial direction. For example α
=60°.

As seen in FIG. 3, the end portion 30 has a semicircular shape. The other three ends are perpendicular to the axial direction.

As shown in FIG. 3, the end portion 30 has a semicircular rounded portion, so that the end portion 30 does not catch on the eyeball when the outer tube 12 is inserted into and taken out from the eyeball.

The tip 35 of the inner cylinder 13 rubs against the end 30 to cut off the object 4 to be sucked.

[Operation] Next, with reference to FIGS. 1 to 3, a description will be given of how the object to be aspirated 4 in the eyeball is actually suctioned and removed.

By operating the suction device 21 shown in FIG. 1, the suction target 4 shown in FIG.
is sucked into the opening 18. And the drive device 2 in FIG.
3 to reciprocate the inner cylinder 13.

As a result, the inner cylinder 13 shown in FIG. 2 is reciprocated in the direction of the arrow, and the object 4 to be aspirated that has entered the opening 18 is reliably removed by rubbing the end portion 30 and the tip portion 35 together. At this time, the tip 35 is first moved to point 3/O of the end 30 in FIG.
Pass through A and then reach point 30B.

For this reason, the object to be sucked is gradually removed without getting caught.

Even if the object cannot be removed at point 30A due to poor alignment, it can be reliably removed by driving the object to point 30B.

In addition, since the end 30 of the opening 18 of the outer tube 12 has a snug portion, it is safe to insert and remove the tube into the eye. The excised object to be aspirated 4 is sent to the suction device 21 via the inner tube 13 and the suction tube 20 shown in FIG.

Another example Please refer to FIGS. 4 and 5.

Both the forward end 130 and the reverse end 131 of the opening 118 of the outer cylinder 112 form acute angles in the movement direction. Both end portions 130 and 131 are rounded as shown in FIG. The inner cylinder 113 also has an opening 200.

The ends 201 and 202 and the tip 203 of the opening 200 are
perpendicular to the axial direction.

The object to be sucked 4 is first cut at the point 130A of the end 130 and the tip 203. If the suction object 4 cannot be cut, force it to the points 130B at both ends and cut it at the points 130B and the tip 203. Further, cut at point 130A of end 130 and end 202. If it cannot be cut in the same way, cut it at the end 202 and point 130B.

By the backward motion, it is cut between the end 201 of the opening 200 of the inner cylinder 112 and the point 131A of the end 131, and if it cannot be cut, the object to be sucked is driven to the point 13↑B and cut between the point 131B and the end 201. .

Complete resection is achieved by repeating the above operations. Note that the angle β0 of the end of the inner cylinder 113 in FIG. γ0 can be determined as the angle at which the cut is most likely to occur, taking into consideration the angle α0 of the end portion 130 of the opening 11/8 of the outer cylinder.

In FIG. 7, the inner tube 213 is provided with a plurality of openings 300. This further increases the cutting ability.

In FIGS. 8 and 9, the outer cylinder 312, 412 is provided with a plurality of openings 318, 418, respectively.

Effects of the Invention According to the invention of claim 1, the cutting quality of the object to be aspirated can be improved, so that the efficiency and safety of surgery can be improved.

According to the invention of claim 2, the internal material can be resected both forward and backward, further increasing the efficiency of surgery.

According to the invention of claim 3, although the structure is simple, cutting can be performed in both forward and backward movements.

According to claim 4, the edges of the outer member are rounded and rounded, so even if the outer member has an acute angle, it is safe because it does not get caught when inserted into the eye and when removed. In addition, the object to be aspirated can be reliably removed while being gradually driven in.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of the surgical cutter of the present invention, FIG. 2 is a cross-sectional view showing the vicinity of the tips of the inner cylinder and the outer cylinder, and FIG.
The figure is a plan view of the same, and FIGS. 4 to 9 are views showing other embodiments. 12......Outer tube 13...Inner tube 18...Opening 0°... End part・・・・・・・・・Tip agent

Claims (4)

[Claims] 1. A hollow inner member is placed in a hollow outer member that is closed at one end, and by moving the inner member back and forth against the outer member, suction is generated by the rubbing of the opening end of the outer member and the inner member. A surgical cutter for cutting an object to be aspirated by rubbing an external member and an internal member together, the surgical cutter being characterized in that the opening end of the external member has an acute angle. 2. The surgical cutter according to claim 1, wherein the forward end and the backward end in the reciprocating direction of the opening of the outer member each form an acute angle. 3. Claim 1, wherein the internal member has an opening. Surgical cutter included. 4. The edge of the opening of the external material is rounded. The surgical cutter according to claim 1.