WO2017026398A1

WO2017026398A1 - Syringe attachable to intraocular lens insertion tool

Info

Publication number: WO2017026398A1
Application number: PCT/JP2016/073120
Authority: WO
Inventors: 修治安部
Original assignee: 興和株式会社
Priority date: 2015-08-07
Filing date: 2016-08-05
Publication date: 2017-02-16
Also published as: JP6849168B2; JPWO2017026398A1

Abstract

Provided is an assistance member for assisting operation of an intraocular lens insertion tool through use of a commonly used injection syringe. The injection syringe can be attached to an intraocular lens insertion tool having a substantially cylindrical tool body having at a distal end thereof an insertion cylinder part for inserting an intraocular lens into an eye, and an intraocular lens push-out member for pressing and moving the intraocular lens to the insertion cylinder part and pushing the intraocular lens out into the eye, the intraocular lens push-out member being provided so as to be able to slide through the inside of the tool body, the injection syringe being configured so that a flange provided to a rear end of the syringe, a connecting part provided to a distal end of the syringe and being connectable to a fluid supply means for supplying a fluid into the syringe, and a moving member provided in the syringe and moving by pressure of the supplied fluid are provided, and a connecting mechanism for connecting to the intraocular lens insertion tool is provided to the flange.

Description

Syringe that can be attached to an intraocular lens insertion device

The present invention relates to a syringe that can be attached to an intraocular lens insertion device.

Intraocular lenses that are inserted as a substitute for the crystalline lens in order to correct the refraction by replacing the human turbid crystalline lens in the treatment of cataract are in practical use. In intraocular lens insertion surgery in the treatment of cataracts, for example, an incision wound (incision) of several millimeters is created on the edge of the cornea, cornea, etc., and the lens is crushed by ultrasonic phacoemulsification, etc. After removal, the intraocular lens is inserted and fixed by an intraocular lens insertion device. In recent years, an auxiliary member that assists insertion of an intraocular lens into the eye using an intraocular lens insertion device has been proposed. In addition, as a conventional general syringe barrel, there are a syringe barrel (for example, Patent Document 1) excellent in safety and impact resistance and a holder (for example, Patent Document 2) that safely uses the syringe cylinder. ing.

JP 2004-344423 A JP 2005-21247 A

However, the conventional auxiliary member that assists the insertion of the intraocular lens insertion device is manufactured exclusively for the intraocular lens insertion device, and the design cost and manufacturing cost of the auxiliary member may not be negligible.

The technology of the present disclosure has been made in view of the above circumstances, and the purpose thereof is to operate an intraocular lens insertion instrument using a syringe of a syringe barrel generally used as a syringe. It is providing the auxiliary member which assists.

The syringe of the present disclosure is provided with a substantially cylindrical instrument body having an insertion cylinder portion at the tip for inserting an intraocular lens into the eye, and slidable within the instrument body, and the insertion cylinder by pressing the intraocular lens A syringe that can be attached to an intraocular lens insertion device that has an intraocular lens pushing member that is moved into the eye and pushed into the eye, the flange provided at the rear end of the syringe, and the syringe provided at the front end of the syringe A connection part connectable with a fluid supply means for supplying fluid into the inside, and a moving member provided in the syringe and moving with the pressure of the supplied fluid, and connected to the intraocular lens insertion device at the flange A connection mechanism is provided. As a result, a function as an auxiliary member for assisting insertion of an intraocular lens insertion device is added while maintaining the function as a conventional syringe barrel by simply changing the configuration of the flange of the syringe conventionally used in a syringe. Can be provided.

Furthermore, the syringe has a flat plate-shaped holding portion that can be hooked by the user of the intraocular lens insertion device, and the connection mechanism is a key-shaped notch that engages with the end surface of the holding portion. Also good. Alternatively, the connection mechanism may be a through hole into which the end surface of the hold portion can be fitted. Moreover, you may comprise said syringe so that attachment to the intraocular lens insertion instrument by which the intraocular lens is loaded beforehand is possible.

In addition, the syringe of the present disclosure is provided with a substantially cylindrical instrument body having an insertion cylinder part at the tip for inserting the intraocular lens into the eye, and slidable within the instrument body, and presses the intraocular lens. A syringe that can be attached to an intraocular lens insertion device having an intraocular lens pushing member that is moved to the insertion tube and pushed into the eye, and is provided at the tip of the syringe and supplies fluid into the syringe And a connecting member that is provided in the syringe and moves with the pressure of the supplied fluid, and a connecting mechanism that connects the intraocular lens insertion device to the syringe. Moreover, it is good also as a structure by which the tube which is a flow path of the fluid supplied by a fluid supply means is connected to the connection part. Furthermore, it is good also as a structure further equipped with the flow-path switching means which switches the flow path of a fluid and the flow path different from the flow path of a fluid provided in the tube, and the syringe barrel connected to another flow path. . Or it is good also as a structure further provided with the flow-path opening-and-closing means provided in the tube which controls interruption | blocking and open | release of the flow path of the fluid.

According to the technology disclosed herein, it is possible to provide an auxiliary member that assists the operation of the intraocular lens insertion device by using a syringe of a syringe barrel that is generally used for a syringe.

It is a figure which shows schematic structure of the injection cylinder in one Embodiment. Fig.2 (a) and FIG.2 (b) are figures which show schematic structure of the intraocular lens insertion instrument in one Embodiment. FIG. 3A and FIG. 3B are diagrams showing a schematic configuration of an intraocular lens in one embodiment. It is a figure which shows schematic structure of the nozzle main body in one Embodiment. Fig.5 (a) and FIG.5 (b) are figures which show schematic structure of the positioning member in one Embodiment. FIG. 6A and FIG. 6B are diagrams showing a schematic configuration of a plunger in one embodiment. FIG. 7A and FIG. 7B are diagrams illustrating the movement of the plunger of the intraocular lens insertion device in one embodiment. It is a figure which shows schematic structure of the syringe barrel in one modification. FIG. 9A and FIG. 9B are diagrams showing a schematic configuration of an intraocular lens insertion device in one modified example. It is a figure which shows schematic structure of the syringe barrel in one modification. Fig.11 (a) and FIG.11 (b) are figures which show schematic structure of the intraocular lens insertion instrument and syringe in one modification. FIG. 12A and FIG. 12B are diagrams showing a schematic configuration of an intraocular lens insertion device and a syringe in one modified example. It is a figure which shows schematic structure of the intraocular lens insertion instrument and syringe in one modification. It is a figure which shows schematic structure of the intraocular lens insertion instrument and syringe in one modification. It is a figure which shows schematic structure of the syringe barrel in one modification. It is a block diagram which shows schematic structure of the cataract surgery apparatus in one modification.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 schematically shows a syringe barrel 100 according to this embodiment. As shown in FIG. 1, the syringe barrel 100 is a syringe barrel that is generally used, and includes a syringe 200, a packing 300, and a plunger 400. At the tip of the syringe 200, a connection part 200a to which an injection needle (not shown) is connected is provided. In addition, a flange 200b is provided at the rear end of the syringe 200 for a user to put a finger on when using the syringe barrel 100. Further, the flange 200b is provided with a pair of key-like notches 200d across the opening 200c of the syringe 200. Details of the function of the notch 200d will be described later. In addition, the configuration of the syringe barrel 100 is the same as that of the conventional syringe barrel except for the above, and detailed description thereof is omitted here.

FIG. 2 schematically shows a state where the syringe 200 is attached to the intraocular lens insertion device 1 according to the present embodiment. 2A is a plan view of the intraocular lens insertion device 1 when the stage lid 13 is opened, and FIG. 2B is a side view of the intraocular lens insertion device 1 when the stage lid 13 is closed. The figure is shown. The intraocular lens insertion instrument 1 includes a nozzle body 10 as an instrument body, a plunger 30 as an intraocular lens pushing member, a stage unit 12 and a stage lid unit 13 as an intraocular lens storage unit. Furthermore, in this embodiment, the syringe 200 of the syringe barrel 100 is attached to the intraocular lens insertion device 1 as an intraocular lens push-out assisting tool that assists in pushing out the intraocular lens. In addition, what attached the intraocular lens extrusion auxiliary tool to the intraocular lens insertion instrument 1 so that it may illustrate in FIG. 2 is called an inserter with an extrusion auxiliary tool.

The stage unit 12 is provided integrally with the nozzle body 10 or separately. A plunger 30 is inserted into the nozzle body 10. The intraocular lens 2 is set on the stage unit 12. The stage lid portion 13 is formed integrally with the stage portion 12. The nozzle main body 10 of the intraocular lens insertion device 1 is formed in a cylindrical shape having a substantially rectangular cross section, and one end of the nozzle body 10 is greatly open (hereinafter, the side having the large opening is referred to as the rear end 10b), and the other side. The nozzle part 15 and the front-end | tip part 10a narrowed down are provided in the edge part. As shown in FIG. 2 (b), the tip 10a is opened obliquely. The plunger 30 is inserted into the nozzle body 10 and can reciprocate.

In the following description, the direction from the rear end portion 10b of the nozzle body 10 to the front end portion 10a is the front direction, the opposite direction is the rear direction, the front side of the page in FIG. 2 (a) is the upper direction, and the reverse direction is the lower direction. In FIG. 2B, the front side of the page is the left direction, and the opposite direction is the right direction. In this case, the upper side is the front side of the optical axis of the lens body 2a, which will be described later, the lower side is the rear side of the optical axis of the lens body 2a, the front side is the front side in the pressing direction by the plunger 30, and the rear side is pressed by the plunger 30 Corresponds to the rear side.

In the vicinity of the rear end portion 10b of the nozzle body 10, a flat plate-shaped holding portion 11 that protrudes in a plate shape and can be hooked by a user when the plunger 30 is pushed into the tip end side of the nozzle body 10 is integrated. Provided. A stage portion 12 for setting the intraocular lens 2 is provided on the rear side of the nozzle portion 15 in the nozzle body 10. The stage portion 12 is configured such that the upper side of the nozzle body 10 is opened by opening the stage lid portion 13. Further, a positioning member 50 is attached to the stage portion 12 from the lower side of the nozzle body 10. By this positioning member 50, the intraocular lens 2 is stably held in the stage portion 12 even before use (during transportation).

That is, in the intraocular lens insertion instrument 1, the intraocular lens 2 is placed on the stage unit 12 and the front side of the optical axis is in a state where the stage lid unit 13 is opened and the positioning member 50 is attached to the stage unit 12. Set to be on top. Then, after the stage lid 13 is closed, it is shipped and sold. Then, the user removes the positioning member 50 with the stage lid portion 13 closed, and then pushes the plunger 30 into the distal end side of the nozzle body 10. As a result, the intraocular lens 2 is pressed by the plunger 30 and moved to the nozzle part 15, and then the intraocular lens 2 is released into the eyeball from the distal end part 10 a. In addition, the nozzle main body 10, the plunger 30, and the positioning member 50 in the intraocular lens insertion device 1 are formed of a resin material such as polypropylene. Polypropylene is a material with a proven track record in medical equipment and high reliability such as chemical resistance.

In this embodiment, the notch 200d of the syringe 200 of the syringe barrel 100 is engaged with the end surface of the hold part 11 of the nozzle body 10, whereby the syringe 200 is attached to the intraocular lens insertion device 1. As shown in FIG. 2B, in the present embodiment, the holding portion 11 of the nozzle body 10 extends in the vertical direction, and the pair of notches 200 d extends from the nozzle body 10 in the holding portion 11 upward. It engages with the end face of the part and the end face of the part extending downward.

Further, the packing 300 of the syringe barrel 100 is provided so as to come into contact with the inner wall of the syringe 200. The packing 300, which is a separate body from the plunger 30, is provided to be slidable on the inner wall while being in close contact with the inner wall of the syringe 200. It is desirable that the packing 300 has such a rigidity that it does not bend when sliding. Moreover, the structure which can isolate | separate the packing 300 and the plunger 400 should just be provided, and the structure is a screw type structure, or a part of cross-sectional area perpendicular | vertical to the axial direction of the plunger 400 is reduced. The structure may be separated by forming a constricted shape and bending and breaking at that portion. In some cases, a part of the plunger 400 remains in the packing 300. Further, when the syringe 200 is connected to the intraocular lens insertion instrument 1, the connection part 200 a of the syringe 200 functions as a fluid supply part for supplying fluid to the space surrounded by the syringe 200 and the packing 300.

In addition, an area surrounded by the syringe 200, the packing 300, and the connection portion 200a is a sealed space. Of the space surrounded by the syringe 200, with the packing 300 as a boundary, the region on the connection part 200a side is defined as a first region 200e, and the region on the plunger 30 side inserted into the nozzle body 10 is defined as a second region 200f. And

The connecting portion 200a can be connected to the tip of the tube 40 and has an opening 200g through which a fluid supplied from the tube 40 passes. A highly versatile medical tube can be connected to the connection part 200a, and it is not necessary to prepare a special tube. In addition, a fluid supply source (not shown) for supplying fluid into the first region 200e is connected to the other end of the tube 40 connected to the connection portion 200a. Examples of the fluid supply source include a compressor for supplying compressed air and a pump for supplying cold / hot water. The tube 40 and the fluid supply source correspond to an example of a fluid supply unit that supplies fluid into the syringe.

FIG. 3 is a diagram showing a schematic configuration of the intraocular lens 2. 3A is a plan view and FIG. 3B is a side view. The intraocular lens 2 is a so-called three-piece type. The intraocular lens 2 is formed of a lens body 2a having a predetermined refractive power and two beard-shaped support portions 2b connected to the lens body 2a for holding the lens body 2a in the eyeball. Yes. The lens body 2a and the support portion 2b are made of a flexible resin material. In the intraocular lens insertion device 1 in the present embodiment, the intraocular lens 2 is disposed such that one of the two support portions 2b is disposed on the rear side of the lens body 2a and the other is disposed on the front side of the lens body. Set. The intraocular lens used in this embodiment may be a so-called one-piece type in which an optical part and a support part are integrally formed.

FIG. 4 shows a plan view of the nozzle body 10. As described above, in the nozzle body 10, the intraocular lens 2 is set on the stage unit 12. In this state, the intraocular lens 2 is pressed by the plunger 30 shown in FIG. 2 and released from the distal end portion 10a. In addition, a through hole 10 c whose cross-sectional shape changes according to a change in the outer shape of the nozzle body 10 is provided in the nozzle body 10. When the intraocular lens 2 is released, the intraocular lens 2 is deformed and folded according to a change in the cross-sectional shape of the through hole 10c in the nozzle body 10, and is formed on the patient's eyeball. It is released after being transformed into a shape that is easy to enter an incision.

Further, the tip portion 10a has a shape cut obliquely so that the upper region of the nozzle portion 15 is in front of the lower region. Note that the shape of the tip portion 10a that is obliquely cut may be linearly obliquely cut when viewed from the left-right direction, or may have a bulge outward, that is, a curved shape. It may be cut into

A stage groove 12 a having a width slightly larger than the diameter of the lens body 2 a of the intraocular lens 2 is formed in the stage portion 12. The dimension in the front-rear direction of the stage groove 12 a is set to be larger than the maximum width dimension including the support portions 2 b extending on both sides of the intraocular lens 2. A set surface 12b is formed by the bottom surface of the stage groove 12a. The vertical position of the set surface 12b is set higher than the height position of the bottom surface of the through hole 10c of the nozzle body 10, and the set surface 12b and the bottom surface of the through hole 10c are connected by a bottom slope 10d. .

The stage portion 12 and the stage lid portion 13 are integrally formed. The stage lid portion 13 has the same size in the front-rear direction as the stage portion 12. The stage lid portion 13 is connected by a thin plate-like connecting portion 14 formed by extending the side surface of the stage portion 12 to the stage lid portion 13 side. The connecting portion 14 is formed to be bendable at the center portion, and the stage lid portion 13 can be closed by overlapping the stage portion 12 from above by bending the connecting portion 14.

In the stage lid 13,

ribs

13 a and 13 b are provided on the surface facing the set surface 12 b when the lid is closed in order to reinforce the stage lid 13 and stabilize the position of the intraocular lens 2. Further, a guide protrusion 13 c is provided as a guide on the upper side of the plunger 30. The stage lid 13 is provided with an injection hole 16 for injecting a viscoelastic material for smooth movement of the intraocular lens in the nozzle. On the outside of the stage lid portion 13, there is provided a projection portion 17 in which a part of the outer periphery of the injection hole 16 is raised. The protrusion 17 has a function of making it easier to inject the viscoelastic material by guiding the needle of the syringe to be injected into the injection hole 16.

As shown in FIG. 2B, a positioning member 50 is detachably provided below the set surface 12b of the stage unit 12. FIG. 5 shows a schematic configuration of the positioning member 50. FIG. 5A shows a plan view of the positioning member 50, and FIG. 5B shows a left side view of the positioning member 50. The positioning member 50 is configured as a separate body from the nozzle main body 10, and has a structure in which a pair of

side wall portions

51, 51 are connected by a connecting portion 52. At the lower ends of the respective side wall portions 51, holding

portions

53, 53 extending outward and extending are formed.

A pair of first mounting

portions

54 and 54 protruding upward are formed at the upper end portions of the

side wall portions

51 and 51, respectively. Further,

first positioning portions

55 and 55 are formed to protrude from the outer peripheral side of the upper end surfaces of the

first placement portions

54 and 54. The distance between the inner sides of the

first positioning portions

55 and 55 is set slightly larger than the diameter of the lens body 2 a of the intraocular lens 2.

Also, a pair of second mounting

portions

56 and 56 projecting upward are formed at both ends in the front-rear direction inside the

side wall portions

51 and 51. The heights of the upper surfaces of the second mounting

parts

56 and 56 are equal to the heights of the upper surfaces of the first mounting

parts

54 and 54. Furthermore,

second positioning portions

57 and 57 that protrude further upward are formed on the outer portions of the upper surfaces of the

second placement portions

56 and 56 over the entire left and right direction of the

second placement portions

56 and 56. . The distance between the inner sides of the

second positioning portions

57 and 57 is set to be slightly larger than the diameter dimension of the lens body 2 a of the intraocular lens 2. In addition, locking

claws

58, 58 that slightly protrude in the front-rear direction are formed on the upper ends of the

second placement portions

56, 56 over the entire left-right direction.

The positioning member 50 is assembled from the lower side of the set surface 12b of the nozzle body 10 as shown in FIG. The set surface 12b of the nozzle body 10 is formed with a set surface through hole 12c that penetrates the set surface 12b in the thickness direction. The outer shape of the set surface through-hole 12c is a substantially similar shape that is slightly larger than the shape of the

first placement portions

54 and 54 and the

second placement portions

56 and 56 of the positioning member 50 as viewed from above. When the positioning member 50 is attached to the nozzle body 10, the

first placement portions

54 and 54 and the

second placement portions

56 and 56 are inserted into the set surface through hole 12c from the lower side of the set surface 12b. , Protruding above the set surface 12b.

At that time, the locking

claws

58, 58 provided in the

second positioning portions

57, 57 protrude through the set surface through hole 12c to the set surface 12b and are locked to the upper surface of the set surface 12b. Accordingly, the positioning member 50 is assembled from the lower side of the nozzle body 10, and the

first placement portions

54 and 54 and the

second placement portions

56 and 56 are fixed in a state of protruding from the set surface 12b. When the intraocular lens 2 is set on the setting surface 12b, the bottom surface of the outer peripheral portion of the lens body 2a is placed on the upper surfaces of the

first placement portions

54 and 54 and the

second placement portions

56 and 56. The Further, the position of the lens body 2a is restricted with respect to the horizontal direction (the direction horizontal to the set surface 12b) by the

first positioning portions

55, 55 and the

second positioning portions

57, 57.

When inserting the intraocular lens 2 into the eyeball, the positioning member 50 is removed from the nozzle body 10 after an appropriate amount of viscoelastic material is injected from the injection hole 16. As a result, the

first placement portions

54 and 54 and the

second placement portions

56 and 56 that have supported the lens body 2a of the intraocular lens 2 are retracted from the set surface 12b, and the intraocular lens 2 is on the set surface 12b. Is movably mounted.

Subsequently, the distal end portion 10a of the nozzle portion 15 of the nozzle body 10 is inserted into the eye from the incision created in the eye tissue. Here, since the distal end portion 10a has an oblique opening shape, it can be easily inserted into the incision. Then, after inserting the nozzle portion 15 into the incision, the pressing plate portion 33 of the plunger 30 is pushed into the distal end side of the nozzle body 10. Thereby, the front-end | tip part 31c of the action part 31 of the plunger 30 contact | abuts to the lens main body 2a outer periphery of the intraocular lens 2 set to the setting surface 12a, and the intraocular lens 2 faces the front-end | tip part 10a with the plunger 30. Guided.

Next, a schematic configuration of the plunger 30 is shown in FIGS. 6 (a) and 6 (b). The plunger 30 has a slightly larger longitudinal length than the nozzle body 10. And it forms from the action part 31 of the front end side based on a column shape, and the insertion part 32 of the rear end side based on a rectangular rod shape. And the action part 31 is comprised including the cylindrical part 31a made into the column shape, and the thin plate-shaped flat part 31b extended in the left-right direction of the cylindrical part 31a.

A notch 31 c is formed at the tip of the action part 31. As shown in FIG. 6A, the notch 31c is formed in a groove shape that opens upward in the action portion 31 and penetrates in the left-right direction. Further, as shown in FIG. 6B, the groove wall on the distal end side of the cutout portion 31 c is formed with an inclined surface that goes upward as it goes to the distal end side of the action portion 31. On the other hand, the insertion part 32 has a substantially H-shaped cross section as a whole, and the horizontal and vertical dimensions thereof are set slightly smaller than the through hole 10 c of the nozzle body 10. In addition, a disc-shaped pressing plate portion 33 is formed at the rear end of the insertion portion 32 so as to spread in the vertical and horizontal directions.

A claw portion 32 a that protrudes upward from the insertion portion 32 and that can move up and down by the elasticity of the material of the plunger 30 is formed at a portion of the insertion portion 32 that is ahead of the center in the front-rear direction. When the plunger 30 is inserted into the nozzle body 10, the claw portion 32 a engages with the locking hole 10 e shown in FIG. 4 provided in the thickness direction on the upper surface of the nozzle body 10, and the initial state The relative position between the nozzle body 10 and the plunger 30 is determined. It should be noted that the claw portion 32a and the locking hole 10e are formed at the positions where the distal end of the action portion 31 is located on the rear side of the lens body 2a of the intraocular lens 2 set on the stage portion 12 in the engaged state. The support portion 2b on the rear side of the main body 2a is set so that the cutout portion 31c can be supported from below.

Prior to the accommodation of the intraocular lens 2 of the intraocular lens insertion device 1 configured as described above, the plunger 30 is inserted into the nozzle body 10 and disposed at the initial position. Further, as described above, the positioning member 50 is attached to the nozzle body 10 from below the set surface 12b. Thereby, the 1st mounting part 54 and the 2nd mounting part 56 of the positioning member 50 are hold | maintained in the state protruded to the set surface 12b.

Next, the lens body 2 a of the intraocular lens 2 is placed and positioned on the upper surfaces of the first placement part 54 and the second placement part 56 with the support part 2 b facing the front-rear direction of the nozzle body 10. In this state, a part of the support portion 2b on the rear side of the intraocular lens 2 is sandwiched between the notches 31c of the plunger 30 and is supported by the bottom surface thereof.

Next, in FIG. 7, the positional relationship between the plunger 30 and the packing 300 provided in the syringe 200 when the intraocular lens 2 moves to the tip portion 10 a of the nozzle body 10 in the inserter with an extrusion assisting tool. Is illustrated. In the present embodiment, when the surgeon moves the intraocular lens 2 housed in the intraocular lens insertion device 1 using the plunger 30, the operator operates the fluid supply source connected to the tube 40 to maintain a constant level. A fluid having a flow rate is supplied to the first region 200e via the tube 40 and the connection portion 200a. The first region 200e is filled with fluid.

When the fluid is further supplied to the first region 200e, the pressure acting on the packing 300 increases. And if the force which moves packing 300 based on the said pressure becomes larger than the maximum static frictional force of packing 300, packing 300 will move to the front side, ie, nozzle body 10 side. As shown in FIG. 7A, the packing 300 comes into contact with the pressing plate portion 33 of the plunger 30.

When the fluid is further supplied to the first region 200e, the packing 300 moves to the nozzle body 10 side and pushes the plunger 30 to the nozzle body 10 side to move it. Thereby, as shown in FIG.7 (b), the intraocular lens 2 can be moved to the front-end | tip part 10a side of the nozzle main body 10. FIG. At that time, it is desirable that the center in the pushing direction of the plunger 30 and the center in the moving direction of the packing 300 coincide.

Further, in this embodiment, by supplying a fluid at a constant flow rate into the syringe 200 using a fluid supply source, the packing 300 and thus the plunger 30 can be moved at a constant speed. Thereby, according to the inserter with an extrusion assisting tool of the present embodiment, the intraocular lens 2 can be moved and inserted into the eye at a stable moving speed in the nozzle body 10. Therefore, by using the inserter with an extrusion assisting tool according to the present embodiment, it is possible to realize more stable injection of an intraocular lens into the eye compared to a conventional intraocular lens insertion device. Further, since the movement of the intraocular lens is stabilized, the burden on the incision created in the eyeball is reduced.

Furthermore, as shown in FIG. 1, the syringe barrel 100 according to the present embodiment not only has a function as a syringe barrel similar to the conventional one but also has a function of an eye only by providing a notch 200d on the flange 200b of the conventional syringe barrel. It also has a function as an extrusion aid for the inner lens. Therefore, when the syringe barrel 100 according to the present embodiment is designed and manufactured so that it can be applied to the inserter with the extrusion assisting tool compared with the case where the dedicated part for the extrusion assisting tool for the intraocular lens is designed and manufactured. It is considered that the cost can be reduced.

The above is the description related to the present embodiment, but the configuration of the syringe and the like is not limited to the above-described embodiment, and various changes can be made within the scope that does not lose the same technical idea as the present invention. Is possible. For example, in the above description, the notch is provided as the connection mechanism with the intraocular lens insertion device. However, not only the notch but also various configurations that can be connected to the intraocular lens insertion device may be provided on the flange, or a mechanism that can be fitted by press fitting may be provided.

Also, for example, there is a cataract surgery device 9000 as shown in FIG. The cataract surgery device 9000 includes a power supply source 9000a, a foot switch 9000b, a perfusate injection device 9000c, a viscoelastic material injection device 9000d, and an intraocular lens insertion device 9000e. The power supply source 9000a, the perfusate injection device 9000c, the viscoelastic material injection device 9000d, and the intraocular lens insertion device 9000e are connected to the foot switch 9000b by tubes 9000f to 9000i, respectively.

The cataract surgery device 9000 is a device in which power is sent from a power supply source 9000a via a foot switch 9000b to a perfusion fluid injection device 9000c, a viscoelastic material injection device 9000d, and an intraocular lens insertion device 9000e. The liquid injection device 9000c, the viscoelastic material injection device 9000d, and the intraocular lens insertion device 9000e are supplied with a perfusion solution (set in the perfusion solution injection device 9000c by the power supplied from the power supply source 9000a via the foot switch 9000b). As an example, BSS (Balanced Salt Solution), viscoelastic substance set in the viscoelastic substance injection device 9000d, and intraocular lens set in the intraocular lens insertion device 9000e may be discharged or ejected individually or simultaneously. It becomes possible.

The following is a modification of the syringe barrel according to the above embodiment. In the following description, components corresponding to the components in the above-described embodiment are denoted by the same reference numerals, and the description thereof is omitted unless otherwise specified.

[Modification 1]
FIG. 8 schematically shows a perspective view of a syringe barrel 1000 according to this modification. As shown in FIG. 8, the flange 2000 b of the syringe barrel 1000 is provided with a pair of through holes 2000 d through which the hold part 11 of the nozzle body 10 of the intraocular lens insertion device 1 is inserted. Further, as shown in FIG. 8, the flange 2000b is curved so that the pair of through holes 2000d face each other with the opening 200c therebetween.

When the syringe 200 is attached to the intraocular lens insertion device 1, as shown in FIG. 9, both end surfaces of the holding portion 11 of the nozzle body 10 are fitted into a pair of through holes 2000d facing each other across the opening 200c. In the present embodiment, the size of the through hole 2000d is designed so that the through hole 2000d and the hold unit 11 are fitted when the hold unit 11 is inserted. Therefore, when the hold part 11 is inserted through the through hole 2000d, the relative position between the through hole 2000d and the hold part 11 is fixed by the frictional force acting between the through hole 2000d and the hold part 11.

As described above, the syringe barrel 1000 according to the present modified example not only has the same function as a conventional syringe barrel, but also changes the configuration of the flange of the conventional syringe barrel as shown in FIG. It also has a function as an extrusion aid for the inner lens. Therefore, similarly to the above embodiment, the injection according to this embodiment can be applied to the inserter with an extrusion assisting tool compared to the case of designing and manufacturing a dedicated part for the extrusion assisting tool for an intraocular lens. It is considered that the cost can be reduced when the cylinder 1000 is designed and manufactured.

[Modification 2]
10 and 11 schematically show a syringe barrel 3000 according to this modification. In the above description, the connection mechanism is provided on the flange. However, the connection mechanism may be provided on other than the flange. For example, as shown in FIG. 10, a connection member 4000 as a connection mechanism may be provided in the syringe 200 of the syringe barrel 3000. The connection member 4000 has an annular flat plate portion 4000a and a notch 4000b. The syringe 200 of the syringe barrel 3000 is inserted through the hole of the flat plate portion 4000a. Further, as shown in FIG. 10, the flat plate portion 4000a is positioned with respect to the syringe 200 in the vicinity of the rear end of the syringe 200, that is, in the vicinity of the flange 200b. The positioning of the flat plate portion 4000a with respect to the syringe 200 can be realized, for example, by providing the outer peripheral surface of the syringe 200 with unevenness that fits with the flat plate portion 4000a.

11A and 11B illustrate a state in which the notch 4000b of the connection member 4000 is engaged with the hold unit 11 of the intraocular lens insertion device 1. FIG. As in the case shown in FIGS. 2 and 7, the notch 4000 b engages with the end surface of the holding portion 11 of the nozzle body 10, whereby the syringe 200 of the syringe barrel 3000 is attached to the intraocular lens insertion device 1. As shown in FIG. 11B, in the present embodiment, the holding portion 11 of the nozzle body 10 extends in the vertical direction, and the pair of 4000d is a portion of the holding portion 11 that extends upward from the nozzle body 10. And the end surface of the portion extending downward are respectively engaged. Therefore, also in this modified example, by providing the connecting member 4000 to the syringe 200 of the conventional syringe barrel, not only has the function as a syringe barrel similar to the conventional one, but also the function as an extrusion assisting tool for the intraocular lens. Have. Therefore, when the syringe barrel 3000 according to the present embodiment is designed and manufactured so that it can be applied to the inserter with the extrusion assisting tool compared to the case where the dedicated part for the extrusion assisting tool for the intraocular lens is designed and manufactured. It is considered that the cost can be reduced.

[Modification 3]
Next, FIGS. 12A and 12B schematically show a syringe barrel 3010 in Modification 3. FIG. As shown in FIGS. 12A and 12B, a substantially wedge-shaped recess 3010 a is provided on the inner wall of the syringe 200 of the syringe barrel 3010. In this modification, when the nozzle body 10 is inserted into the syringe 200 together with the hold unit 11, the hold unit 11 is received in the recess 3010a. Therefore, also in this modification, only by providing the concave portion 3010a in the syringe 200 of the conventional syringe barrel, it has not only a function as a syringe barrel similar to the conventional one but also a function as an extrusion assisting tool for the intraocular lens. . Therefore, in the case where the syringe barrel 3010 according to this embodiment is designed and manufactured so as to be applicable to the inserter with the extrusion assisting tool compared to the case where the dedicated part for the intraocular lens pushing assisting tool is designed and manufactured. It is considered that the cost can be reduced.

[Modification 4]
Next, the syringe barrel in the modified example 4 will be described with reference to FIG. The syringe barrel in this modification is the same as the syringe barrel 100 described above. In the present modification, a cock 510 is provided on the tube 40 connected to the opening on the rear end face of the connecting portion 200a. The tip of a syringe barrel 520 is connected to the cock 510. The cock 510 corresponds to an example of a flow path switching unit. When the plunger 520a of the syringe barrel 520 is pushed into the distal end side of the syringe barrel 520, the air between the packing 520b and the distal end of the syringe barrel 520 passes through the cock 510 and the tube 40, and the first syringe 200 Move to area 200e. Further, when the plunger 520a of the syringe barrel 520 is pulled back to the rear end side of the syringe barrel 520, the air between the cock 510 and the packing 300 passes through the cock 510 and the tip of the packing 520b and the syringe barrel 520. Move between.

During the storage of the intraocular lens insertion device 1, the packing 300 may adhere to the inner wall of the syringe 200. In such a case, if air is continuously supplied from the fluid supply source to the first region 200e, the air pressure in the first region 200e increases, and the packing against the inner wall of the syringe 200 is performed at a timing not intended by the operator. There is a possibility that the sticking of 300 is released and the packing 300 starts to move. In this modification, the surgeon operates the plunger 520a to send air from the syringe barrel 520 to the first region 200e before starting the supply of air to the first region 200e by the fluid supply source. Thus, the sticking of the packing 300 to the inner wall of the syringe 200 can be released. In addition, as a method for releasing the adhesion of the packing 300, not only supplying air but also sucking air may be used. Thus, since the supply of air to the first region 200e by the fluid supply source can be started after the fixation of the packing 300 is released, the movement of the packing 300 is started almost simultaneously with the start of the supply of air. can do. As a result, when the air is supplied to the first region 200e by the fluid supply source, the movement of the packing 300 can be prevented from starting at a timing not intended by the operator as described above.

If the packing 300 and the pressing plate portion 33 of the plunger 30 are integrally fixed, the surgeon pulls the plunger 520a of the syringe barrel 520 back to the rear end side of the syringe barrel 520, so that the nozzle body The plunger 30 that has moved to the tip portion 10a side of 10 can be pulled back to the fluid supply portion 20d side again. In the above description, the fluid supplied from the fluid supply source and the syringe barrel 520 has been described as air. However, the fluid to be used is not limited to air. Further, the shape of the syringe barrel 520 is not limited to the shape shown in the present modified example as long as it has a function of supplying or sucking fluid.

[Modification 5]
Next, the syringe barrel in the modified example 5 will be described with reference to FIG. The syringe barrel in this modification is the same as the syringe barrel 100 described above. In the present modification, a cock 610 is provided in the middle of the tube 40 connected to the opening on the rear end face of the connecting portion 200a. The flow path of the fluid supplied from the fluid supply source in the tube 40 is blocked in advance by the cock 610. Then, when starting the supply of fluid to the first region 200e by the fluid supply source, the operator operates the cock 610 to open the fluid flow path. In this way, since the supply of fluid to the first region 200e by the fluid supply source can be controlled by the cock 610, for example, during preparation for the operator to use the intraocular lens insertion device 1, it is not intended. It can be prevented that the fluid is supplied to the first region 200e by the fluid supply source and the packing 300 starts to move. The cock 610 corresponds to an example of the channel opening / closing means of the tube 40.

[Modification 6]
Next, the syringe barrel 5000 in Modification 6 will be described with reference to FIG. In the above description in FIG. 2, as a structure for separating the packing 300 and the plunger 400, a screw-type structure or a part of a cross-sectional area perpendicular to the axial direction of the plunger 400 is reduced (a constricted shape is formed). ), The structure separated by bending fracture at that part. However, the structure which isolate | separates packing 300 and the plunger 400 can also be made into the injection cylinder 5000 shown in FIG.

In this modification, a press-fitting portion 7000a capable of press-fitting the tip portion 6000a of the plunger 6000 is formed in the packing 7000. For example, the surgeon closes the entrance / exit of air at the opening of the connection portion 200 a using the luer cock 8000 and pulls the plunger 6000 toward the rear end side of the syringe 200. At that time, since negative pressure is generated in the packing 7000, movement of the packing 7000 is hindered by the negative pressure. Thereby, the front-end | tip part 6000a of the plunger 6000 can be isolate | separated from the press-fit part 7000a of the packing 7000.

When the distal end portion 6000a of the plunger 6000 is separated from the press-fitting portion 7000a of the packing 7000, the packing 7000 is once moved to the rear end side of the syringe 200, so that the packing 300 is fixed to the inner wall of the syringe 200. The Then, when the plunger 6000 is separated from the packing 7000, the packing 7000 may vigorously move to the distal end side of the syringe 200 and may hit the distal end surface 200h to generate a sound. Based on this, it is desirable that the position of the packing 7000 when the plunger 6000 is pulled out be a position away from the distal end surface 200h of the syringe 200 toward the rear end side of the syringe 200.

1 Intraocular lens insertion device 10 Nozzle body 30

Plunger

100, 520, 1000, 5000 Syringe 200

Syringe

300, 7000

Packing

200d, 4000b Notch 2000d Through-hole 4000 Connecting

member

510, 610 Cock

Claims

A substantially cylindrical instrument body having an insertion tube portion at the tip for inserting an intraocular lens into the eye, and a slidable portion provided in the instrument body, pressing the intraocular lens and moving to the insertion tube portion A syringe that can be attached to an intraocular lens insertion device having an intraocular lens pushing member that is pushed into the eye,
A connecting portion provided at a tip of the syringe and connectable to a fluid supply means for supplying a fluid into the syringe;
A moving member provided in the syringe and moving at a pressure of the supplied fluid;
With
The syringe is provided with a connection mechanism for connecting to the intraocular lens insertion instrument.
A substantially cylindrical instrument body having an insertion tube portion at the tip for inserting an intraocular lens into the eye, and a slidable portion provided in the instrument body, pressing the intraocular lens and moving to the insertion tube portion A syringe that can be attached to an intraocular lens insertion device having an intraocular lens pushing member that is pushed into the eye,
A flange provided at the rear end of the syringe;
A connecting portion provided at a tip of the syringe and connectable to a fluid supply means for supplying a fluid into the syringe;
A moving member provided in the syringe and moving at a pressure of the supplied fluid;
With
A syringe, wherein the flange is provided with a connection mechanism for connecting to the intraocular lens insertion instrument.
The instrument body has a flat plate-shaped holding part that can be used by a user of the intraocular lens insertion instrument.
The syringe according to claim 2, wherein the connection mechanism is a key-shaped notch that engages with an end surface of the hold portion.
The instrument body has a flat plate-shaped holding part that can be used by a user of the intraocular lens insertion instrument.
The syringe according to claim 2, wherein the connection mechanism is a through hole into which an end surface of the hold portion can be fitted.
The syringe according to any one of claims 1 to 4, wherein the syringe can be attached to the intraocular lens insertion device that is preloaded with the intraocular lens.
The syringe according to any one of claims 1 to 5, wherein a tube that is a flow path of a fluid supplied by the fluid supply means is connected to the connection portion.
A flow path switching means provided in the tube, for switching between the flow path of the fluid and a flow path different from the flow path of the fluid;
The syringe according to claim 6, further comprising a syringe barrel connected to the another flow path.
The syringe according to claim 6, further comprising a channel opening / closing means provided on the tube for controlling blocking and opening of the fluid channel.