JP6910035B2 - forceps - Google Patents

Description

The present invention relates to forceps for grasping or excising a target portion with a fixed blade and a movable blade.

Conventionally, as such forceps, bone forceps for grasping or excising bone are known (see, for example, Patent Document 1). The bone forceps of Patent Document 1 includes a fixed portion having a fixed blade facing backward at the front end and a movable portion having a movable blade facing forward at the front end.

The fixed portion guides the movable portion so that the fixed blade and the movable blade can move between the front position where the fixed blade and the movable blade cooperate to grip or cut the target portion and the retracted position which is separated from the front position. A part is provided. The movable portion is moved by the operation portion according to the guide portion, is released from the guide portion at the retracted position, and can be removed.

Further, the bone forceps are provided with a locking means capable of switching between a locked state for preventing the movable portion from moving to the retracted position and an allowed unlocked state. This locking means has a lever pivotally supported at a position where a finger of a handle constituting the operation unit is hung. The lever is rotatably supported by the handle and turned on another pair of handles to switch between the locked state and the unlocked state.

The bone forceps are used normally in the locked state. Then, in the unlocked state, the movement of the movable portion is not restricted, and the movable portion can be moved backward and removed.

Japanese Unexamined Patent Publication No. 2010-46114

However, according to the bone forceps of Patent Document 1, it is used in a locked state, that is, in a state where the movable part can move within a certain range suitable for grasping or excising the target site. Therefore, when positioning the bone forceps at the target site using an endoscope or the like or when searching for the affected part, the field of view is limited by the tip of the movable part, which may hinder the positioning or search.

An object of the present invention is to provide forceps that can avoid the limitation of the field of view due to the tip of the movable portion as much as possible in view of the problems of the prior art.

The forceps of the present invention
A fixed part with a fixed blade facing backward at the front end,
A movable part having a movable blade at the front end that grips or cuts the target part in cooperation with the fixed blade,
A guide portion provided on the fixed portion and guiding the movable portion so as to be able to move in the front-rear direction,
An operation unit for moving the movable portion between a front position where the fixed blade and the movable blade cooperate with each other and a restricted position behind the front position according to the guidance of the guide portion.
It is provided with a limited position setting unit for setting the restricted position to a predetermined first position or a second position behind the first position so as to be changeable .
The second position is a position set when the tip of the forceps is positioned on the target site.
The first position is characterized in that it is a position set when the target portion is gripped or excised after the positioning.

In this configuration, when the forceps are positioned at the target site using an endoscope or when the affected area is searched for with the forceps, if the movement restriction position of the movable part is set to the first position, the tip of the movable part is set. The field of view may be limited to some extent depending on the part.

In this case, the restricted position can be changed to the second position by the restricted position setting unit, and the movable portion can be moved to the second position, thereby avoiding the limitation of the field of view by the tip of the movable portion as much as possible. can. This makes it possible to more efficiently position the symmetrical portion and search for the target portion.

That is, the movable portion can be positioned at the second position, and the tip portion of the forceps can be positioned at the target portion while avoiding the limitation of the field of view by the tip portion of the movable portion. Further, after that, the movable portion can be positioned at the first position, and the target portion can be appropriately gripped or excised.

In the present invention, the restricted position setting unit is in contact with a first rotating position that abuts on the rear end surface of the movable portion and restricts the movable portion from moving rearward from the first position, and the movable portion. It is preferable to provide a rotating member provided on the operating portion so that the rotating member can rotate with the second rotating position.

According to this, by rotating the rotating member to the first rotating position, when the movable portion moves rearward, the rotating member comes into contact with the rear end surface of the movable portion and the movable portion is directly moved. Since the movement range of is limited to the first position, this limitation can be performed reliably and accurately.

In this case, the operation unit is
A fixed handle fixed to the fixed portion and
It is provided with a movable handle that is rotatably connected to the movable portion and the fixed handle and for moving the movable portion according to the guide portion by rotating with respect to the fixed handle.
The rotating member is provided on the fixed handle.
The limited position setting unit abuts each other when the movable portion moves to the second position, and the movable handle and the fixed portion are fixed so as to limit the backward movement of the movable portion to the second position. It is preferable to provide a contact surface provided on the handle.

According to this, the restricted position can be set to the first position by rotating the rotating member to the first rotating position as described above, and by rotating the rotating member to the second rotating position. The limiting position can be set to the second position. That is, the operation of setting the limiting position to the first position or the second position can be easily performed by operating only the rotating member.

It is a front view of the forceps which concerns on one Embodiment of this invention. It is a side view of the forceps of FIG. FIG. 3 is a cross-sectional view taken along the line III-III of FIG. It is a front view of the forceps of FIG. 1 in another state. It is a side view of the forceps in the state of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the forceps 1 according to the embodiment of the present invention has a fixing portion 3 having a rearward facing fixing blade 2 at the front end, a movable portion 5 having a movable blade 4 at the front end, and a fixing portion 3. The movable portion 5 is provided with a guide portion for guiding the movable portion 5 so as to be able to move in the front-rear direction.

The movable blade 4 faces forward and has a function of grasping or excising a target portion such as cartilage in cooperation with the fixed blade 2. That is, the forceps 1 is called a Kerison punch, a bone forceps, or the like, and is used for grasping or removing a tissue of bone or cartilage. The movable blade 4 and the fixed blade 2 may be upright or tilted at an angle of 90 ° with respect to the front-rear direction.

The movable portion 5 includes a rod-shaped rod portion 6 and a movable front end portion 7 detachably attached to the front end of the rod portion 6. The movable blade 4 is provided at the front end of the movable front end portion 7.

The fixing portion 3 includes a hollow pipe-shaped pipe portion 8 and a fixing front end portion 9 provided at the front end of the pipe portion 8. The fixed front end portion 9 includes a semi-cylindrical front half portion 10 on the front end side and a semi-cylindrical rear half portion 11 on the rear end side. The fixed blade 2 is provided at the front end of the front half portion 10.

As shown in FIG. 3, a guide rail 12 having a T-shaped cross section and guiding the movable front end portion 7 is provided on the upper surface of the semi-cylindrical front half portion 10. The movable front end portion 7 is provided with a T-shaped groove 13 that fits and slides with the guide rail 12. The movable front end portion 7 is guided in the front-rear direction by the guide rail 12 via the groove 13.

The inner surface of the pipe portion 8 and the inner surface of the latter half portion 11 of the fixed front end portion 9 guide the rod portion 6 in the front-rear direction. Therefore, the guide portion for guiding the movable portion 5 includes the guide rail 12 of the first half portion 10 and the inner surface of the second half portion 11 and the pipe portion 8.

Following the guidance of the guide portion, the movable portion 5 is moved by the operating portion 14 between the front position where the fixed blade 2 and the movable blade 4 cooperate with each other and the restricted position behind the front position. This limited position is set by the limited position setting unit 15 so as to be changeable to a predetermined first position P1 or a second position P2 behind the first position P1.

The second position P2 is, for example, a position set when the tip of the forceps 1 is positioned at a target site where gripping or excision by the forceps 1 is required, and the first position P1 is the position after the positioning. This is the position set when gripping or excising the target site.

The limiting position setting unit 15 includes a rotating member 16 provided on the operating unit 14. As shown in FIGS. 1 and 2, the rotating member 16 comes into contact with the rear end surface of the movable portion 5 and has a first rotating position C1 that restricts the movable portion 5 from moving backward from the first position P1. , Is provided so as to be able to rotate with the second rotation position C2 which does not contact the movable portion 5.

The operating portion 14 is rotatably connected to the fixed handle 17 fixed to the fixed portion 3 and the movable portion 5 and the fixed handle 17, and the movable portion 5 is moved by rotating with respect to the fixed handle 17. It is provided with a movable handle 18 for moving according to the guide portion of the above.

The rotating member 16 is provided on the fixed handle 17. That is, the rotating shaft 19 of the rotating member 16 is supported by the fixed handle 17. Further, the fixed handle 17 is provided with a ball plunger 20 for fixing the rotating member 16 to the first rotating position C1 so as to be releasable.

Further, when the movable portion 5 moves to the second position P2, the limited position setting unit 15 comes into contact with each other and limits the backward movement of the movable portion 5 to the second position P2. A contact surface 21 provided on each of the fixed handles 17 is provided.

The movable portion 5 also includes a contact member 22 fixed to the rear end of the rod portion 6 and rotatably connected to the upper end portion of the movable handle 18. When the movable portion 5 is moved backward, the contact member 22 comes into contact with the rotating member 16 located at the first rotating position C1, so that the movable portion 5 is restricted to the first position P1. NS.

Therefore, in the limited position setting unit 15, the restricted position when the movable portion 5 moves rearward by positioning the rotating member 16 at the first rotating position C1 is set at the first position P1, and the rotating member is set. By positioning 16 at the second rotation position C2, the limited position can be set at the second position P2.

1 and 2 show a state when the restricted position is set to the first position P1. 4 and 5 show a state when the limited position is set to the second position P2 and the movable portion 5 is located at the second position P2.

The fixing handle 17 is fixed to the fixing portion 3 via a cylindrical member 23 provided at the rear end portion of the pipe portion 8. Therefore, a part of the outer surface of the cylindrical member 23 is fixed to the front end portion of the fixed handle 17. The rod portion 6 passes through the inside of the pipe portion 8 and protrudes from the rear end surface of the cylindrical member 23, and is fixed to the front end portion of the contact member 22.

A compression coil spring 24 for urging the abutting member 22 rearward with respect to the cylindrical member 23 is provided in a portion of the rod portion 6 between the cylindrical member 23 and the abutting member 22.

The movable front end portion 7 can be released from the fixing by loosening the screw that fixes the movable front end portion 7 to the rod portion 6. Then, the movable front end portion 7 is slid rearward until it comes into contact with the front end of the pipe portion 8 in a state where the limiting position is set to the second position P2 and the fixing is released as shown in FIG. The mating with the 12 is released, and it can be removed upward.

In this configuration, when the forceps 1 is used while observing with an endoscope or the like, the following usage methods can be considered. That is, first, it is assumed that the rotating member 16 of the limiting position setting unit 15 is positioned at the second rotating position C2 as shown in FIGS. 4 and 5.

That is, the position where the movable portion 5 is restricted to move backward is set to the second position P2, which is the position where the contact surfaces 21 of the movable handle 18 and the fixed handle 17 come into contact with each other. The movable portion 5 is located at the second position P2 because the contact member 22 is pushed backward by the urging force of the compression coil spring 24.

In the state where the movable portion 5 is located at the second position P2 in this way, the operator grasps the operating portion 14 and positions the tip portion of the forceps 1 at the target site. At this time, since the movable portion 5 is located at the second position P2, the movable blade 4 of the movable portion 5 is in a state of being separated from the fixed blade 2 of the fixed portion 3 by about 20 mm as shown in FIG. Therefore, when the fixed blade 2 is positioned at the target portion, the target portion is not hidden behind the movable blade 4, so that the positioning is performed without any trouble.

Next, the operator brings the movable handle 18 of the operation unit 14 closer to the fixed handle 17, positions the contact member 22 in front of the rotating member 16, and positions the rotating member 16 in the first rotating position C1. Positioned in. As a result, the rear end of the movable range of the movable portion 5 is set to the first position P1 which is the position where the contact member 22 of the movable portion 5 abuts on the rotating member 16.

After that, when the operator relaxes the force for gripping the operating portion 14, the movable portion 5 is positioned at the first position P1 by the urging force of the compression coil spring 24. As a result, the amount of stroke that can be made forward of the movable portion 5 is about 6 mm.

Next, the operator operates the operation unit 14 to bring the movable handle 18 closer to the fixed handle 17, so that the movable blade 4 is brought close to the fixed blade 2 and a part of the bone or cartilage as the target site is moved. It can be gripped or cut by sandwiching it between 4 and the fixed blade 2. The target portion separated by cutting is stored in the space inside the movable blade 4.

The separated target portion is easy because the movable blade 4 is moved backward by the compression coil spring 24 and the guide rail 12 of the front half portion 10 is pushed forward by loosening the force for the operator to grip the operating portion 14. Is discharged from the movable blade 4.

As described above, the movable front end portion 7 is set to the second position P2, the movable portion 5 is slid rearward, the movable front end portion 7 is released from being fixed to the rod portion 6, and the movable front end portion 7 is further released. It can be easily removed by sliding the portion 7 rearward. As a result, maintenance of the fixed front end portion 9 and the movable front end portion 7 can be easily performed.

As described above, according to the present embodiment, the restricted position is changed to the second position P2 by the restricted position setting unit 15, and the movable portion 5 is moved to the second position P2, whereby the tip portion of the movable portion 5 is used. It is possible to avoid the limited visibility as much as possible.

Further, when positioning the tip of the forceps 1 on the target site, the limiting position is set to the second position P2 to perform positioning reliably and quickly under a wide field of view, and then the limiting position is set to the first position P1. It can be set and the target site can be reliably grasped or excised.

Further, since the rotating member 16 is rotated to the first rotating position C1 so that the contact member 22 and the rotating member 16 can come into contact with each other, the limiting position is set to the first position P1. , The movement restriction of the movable portion 5 to the first position P1 can be surely and accurately performed.

Further, since the abutting surface 21 of the limiting position setting unit 15 limits the backward movement of the movable portion 5 to the second position P2, the rotating member 16 is rotated to the second rotating position C2. Thereby, the restricted position can be set to the second position P2.

That is, according to the limit position setting unit 15, the operation of setting the limit position to the first position P1 or the second position P2 causes the position of the rotating member 16 to be set to the first rotation position C1 or the second rotation position C2. It can be easily done by switching.

Although the embodiments of the present invention have been described above, the present invention is not limited thereto. For example, the restricted position setting unit is configured by means for selectively arranging two types of members that come into contact with the movable portion 5 at the first position P1 and the second position P2 on the moving path of the movable portion 5. May be good.

1 ... Forceps, 2 ... Fixed blade, 3 ... Fixed part, 4 ... Movable blade, 5 ... Movable part, 6 ... Rod part, 7 ... Movable front end part, 8 ... Pipe part, 9 ... Fixed front end part, 10 ... Front half part , 11 ... latter half, 12 ... guide rail, 13 ... groove, 14 ... operation part, 15 ... restricted position setting part, 16 ... rotating member, 17 ... fixed handle, 18 ... movable handle, 19 ... rotating shaft, 20 ... ball plunger, 21 ... contact surface, 22 ... contact member, 23 ... cylindrical member, 24 ... compression coil spring, P1 ... first position, P2 ... second position, C1 ... first rotation position, C2 … Second rotation position.

Claims (3)

A fixed part with a fixed blade facing backward at the front end,
A movable part having a movable blade at the front end that grips or cuts the target part in cooperation with the fixed blade,
A guide portion provided on the fixed portion and guiding the movable portion so as to be able to move in the front-rear direction,
An operation unit for moving the movable portion between a front position where the fixed blade and the movable blade cooperate with each other and a restricted position behind the front position according to the guidance of the guide portion.
It is provided with a limited position setting unit for setting the restricted position to a predetermined first position or a second position behind the first position so as to be changeable .
The second position is a position set when the tip of the forceps is positioned on the target site.
The forceps characterized in that the first position is a position set when grasping or excising the target portion after the positioning. The limited position setting unit has a first rotation position that abuts on the rear end surface of the movable portion and restricts the movable portion from moving backward from the first position, and a second rotation that does not contact the movable portion. The forceps according to claim 1 , further comprising a rotating member provided on the operating portion so that the forceps can rotate with respect to the moving position. The operation unit
A fixed handle fixed to the fixed portion and
It is provided with a movable handle that is rotatably connected to the movable portion and the fixed handle and for moving the movable portion according to the guide portion by rotating with respect to the fixed handle.
The rotating member is provided on the fixed handle.
The limited position setting unit abuts each other when the movable portion moves to the second position, and the movable handle and the fixed portion are fixed so as to limit the backward movement of the movable portion to the second position. The forceps according to claim 2 , further comprising a contact surface provided on the handle.

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