JPH0351046A - Operating cutter - Google Patents

Abstract

PURPOSE:To reduce the residual suction force when suction is stopped and prevent the suction unnecessary portion or suction prohibited portion from being coercibly sucked by providing an opening/closing means opening or closing a suction passage and an operating means operating the opening/closing means. CONSTITUTION:An opening/closing means 30 is provided at the position corresponding to the suction passage 40 of an operating cutter 10, and the opening/ closing means 30 is operated by an operating means 40. When a sucking device 21 is stopped for the convenience of operation during suction, the residual suction force is generated in the suction passage 40. There is a fear that a constituting material in an eyeball, e.g. a retina, is sucked by the residual suction force. An operator operates the operating means 31, and the suction passage 40 is closed by the stopper 32 of the opening/closing means 30. The suction passage 40 is cut off in the middle, the residual suction force is sharply reduced, thus the suction unnecessary portion or the suction prohibited portion is not sucked when suction is stopped.

Description

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

BACKGROUND ART A conventional cutter is, for example, as follows. The cutter has a built-in piston that moves back and forth using compressed air. The insertion section inserted into the eyeball in vitrectomy surgery includes an outer cylinder and an inner cylinder. The inner cylinder is fitted into the outer cylinder, and the inner cylinder is mechanically integrated with the piston. Therefore, the inner cylinder can be reciprocated with respect to the outer cylinder by reciprocating the piston.

The outer cylinder is provided with an opening, through which the cloudy part of the vitreous body in the eyeball is suctioned, and the suctioned vitreous body is removed by the reciprocating movement of the inner cylinder.

The excised vitreous body passes through the suction passage and is suctioned to the outside.

Problem to be Solved by the Invention However, in this type of cutter, residual suction force is generated in the suction passage even after the suction is stopped after the surgery is completed. Therefore, there is a risk that parts of the eye that need not be suctioned or parts that should not be suctioned, such as the retina, may be suctioned. Therefore, the safety of the surgery cannot be ensured.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a surgical cutter that does not suck even areas where suction is not required or where suction is prohibited when suction is stopped.

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 FIG.

An opening/closing means 30 is provided at a location corresponding to the suction passage 40 of the surgical cutter 10. This opening/closing means 30 is operated by an operating means 31, and the suction passage 4
Close 0.

Effect: By closing the suction passage 40, suction due to residual suction force is reduced.

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, tubes 17a, 20, etc. This cutter 10 cuts out the object to be aspirated 4 inside the eyeball and removes the suction device 2.
1.

[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 on the closed end side of the hollow outer cylinder 12.

A portion of the hollow 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. The rear end side of the inner cylinder 13 is sealed with an O-ring 27.

A rear end opening 13a of the inner cylinder 13 is open.

The extended mounting portion 14a of the rear member 14 is hollow.

A rear end side 13b of the inner cylinder 13 is disposed coaxially within the extension attachment portion 14a.

Moreover, one end of the tube 20 is connected to the extension attachment portion L4a. Therefore, even if the inner cylinder 13 moves reciprocatingly as will be described later, the tube 20 remains stationary regardless of the reciprocating movement. The other end of the tube 20 is a suction device 2
Connected to 1.

[Opening/closing means 30] The extension attachment portion 14a1 tube 20 and the inner cylinder 13 constitute a suction passage 40. An opening/closing means 30 is provided on the extension attachment portion 14a. Stopper 3 of opening/closing means 30
2 can close the rear end opening 13a of the inner cylinder 13 as shown in FIG. That is, by operating the operating means 31, the stopper 32 moves from the state shown in FIG. 1 to the state shown in FIG. 2, thereby closing the rear end frontage L3a.

The suction passage 40 is thereby interrupted. If the operating means 31 is operated, the stopper 32 is moved out again and the suction passage 40 is closed.
can be opened.

The opening/closing means 30 is a solenoid valve. The operating means 31 is a foot switch, which the operator steps on to operate. The operating means 31 can further operate the suction device 21 and the drive device 23.

The spring 16 pushes the piston 15 toward the rear member 14. A compressed air pulse is sent from the drive device 23 to the piston 15 via the air pipe 17 and the tube 17a, and the piston 15 moves forward against the force of the spring 16 (
It is now possible to move (leftward in Figure 1). When the compressed air pulse ceases, the force of the spring 16 causes the piston 15 and diaphragm 26 to return to their initial positions.

In this way, the piston 15 and the inner cylinder 13 reciprocate. This spring 16 is connected to the O-ring retainer 24 and the stopper 1.
It is located between 5.

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. A spacer 28 is provided between the rear member 14 and the piston 15.

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.

The pressure from the air pipe 17 causes the diaphragm 26 to
moves forward against the spring 16. Piston 15 and inner cylinder 13 attached to diaphragm 26 at the same time
moves forward until the piston 15 hits the main body 11.

As a result, the object 4 sucked into the opening 18 on the side surface of the outer cylinder 12 is removed. The piston 15 is pushed rearward by the spring 16. At the same time, the inner cylinder 13 and diaphragm 26 also return to the rear.

[Operation] (1) Next, with reference to the flowchart of FIG. 3 and FIGS. 1 and 2, a description will be given of how the object to be aspirated 4 in the eyeball is actually suctioned and removed.

The suction device 21 shown in FIG. 1 is operated to suck the object 4 into the opening 18. Then, the drive/drive device 23 shown in FIG. 1 is operated to cause the piston 15 to reciprocate.

This causes the inner cylinder 13 in FIG. 1 to reciprocate and open the opening 1.
The object to be aspirated 4 contained in 8 is removed. The excised object to be aspirated 4 is sent to the suction device 21 via the inner tube 13, the extension attachment portion 14a, and the tube 20 shown in FIG.

If the suction device 21 is stopped during suction due to surgical reasons, a residual suction force is generated in the suction passage 40 due to strong suction. Therefore, this residual suction force may further suction constituent substances within the eyeball, such as the retina.

Then, the operator operates the operating means 31 to close the suction passage 40 with the stopper 32 of the opening/closing means 30, as shown in FIG. Alternatively, when the suction is stopped, the suction passage 40 is closed by the switchper 32 of the opening/closing means 30. As a result, the suction passage 40 is cut off in the middle and the residual suction force is significantly reduced, so that the risk of further suction is eliminated or significantly reduced.

When the removal of the residual suction force is completed, the stopper 32 is withdrawn and the suction passage is opened. If suction continues, restart suction. Exit if you do not want to continue.

In the above-mentioned operation example, the suction was restarted after the suction passage 40 was opened.

(2) In the next operation example shown in FIG. 4, the suction passage 40 is opened after suction is restarted.

When suction is performed as described above and suction is stopped, suction passage 40 is closed. When the residual suction force in the suction passage 40 is removed, the suction device 21 is reactivated to restart suction. After that, the suction passage 40 is opened and suction is continued. If suction is not restarted, it will end.

The invention is not limited to the embodiments described above.

For example, instead of a solenoid valve, a combination of a motor and a cam or a rotary solenoid can be used. Alternatively, a part of the portion constituting the suction passage may be crushed and closed. In this case, it is conceivable to crush the flexible tube.

Moreover, it can be applied not only to cutters for vitreous surgery but also to other fields.

Effects of the Invention According to the present invention, even if the suction is stopped, the residual suction force can be reduced, and unnecessary portions or even portions where suction is prohibited will not be forcibly suctioned. Therefore, the safety of the surgery can be maintained.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the surgical cutter of the present invention,
FIG. 2 is a sectional view showing the stopper in the open state, FIG. 2 is a sectional view showing the stopper in the closed state in the same embodiment, and FIGS. 3 and 4 are operation examples. 12...Outer tube 13...Inner tube 14a...Extension attachment part 20...Tube 21... ...Suction device 30... Opening/closing means 31... Operation means 32... Stopper 40...・Suction passage

Claims (1)

[Claims] A hollow inner member is placed in a hollow outer member that has an opening and is closed at one end, and by reciprocating the inner member relative to the outer member, the object is sucked into the opening of the outer member. A surgical cutter for cutting an aspirated object and transporting the aspirated object through a suction passage, comprising: an opening/closing means for opening/closing the suction passage; and an operating means for operating the opening/closing means. cutter.