WO2012147810A1 - 眼内レンズ挿入器具 - Google Patents
眼内レンズ挿入器具 Download PDFInfo
- Publication number
- WO2012147810A1 WO2012147810A1 PCT/JP2012/061121 JP2012061121W WO2012147810A1 WO 2012147810 A1 WO2012147810 A1 WO 2012147810A1 JP 2012061121 W JP2012061121 W JP 2012061121W WO 2012147810 A1 WO2012147810 A1 WO 2012147810A1
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- WIPO (PCT)
- Prior art keywords
- intraocular lens
- insertion device
- pushing
- holding
- opening
- Prior art date
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/14—Eye parts, e.g. lenses, corneal implants; Implanting instruments specially adapted therefor; Artificial eyes
- A61F2/16—Intraocular lenses
- A61F2/1662—Instruments for inserting intraocular lenses into the eye
- A61F2/167—Instruments for inserting intraocular lenses into the eye with pushable plungers
Definitions
- the present invention relates to an intraocular lens insertion device for inserting an intraocular lens into the eye.
- an injector used for insertion of an intraocular lens a preset type that is stored and transported in a state where the intraocular lens is set in advance in the injector is known.
- This type of injector incorporates a separate holding member (holding means) to suppress movement of the intraocular lens during storage, and the intraocular lens can be used by removing the holding member during use. (See Patent Document 1).
- Patent Document 1 when the holding member (holding means) for holding the intraocular lens is composed of a member separate from the injector body, the internal structure of the injector body becomes complicated. In addition, when the intraocular lens is used, an operation for removing the holding portion must be performed first, which is troublesome.
- the present invention provides an intraocular lens insertion device that can hold an intraocular lens with a simple configuration and can suitably release the holding state of the intraocular lens during use.
- the present invention is characterized by having the following configuration.
- an intraocular lens insertion device including an insertion portion having an inner wall for folding an intraocular lens into a small size, and a cylindrical body having a plunger for pushing out the intraocular lens from the distal end of the insertion portion.
- a holding means provided in the cylindrical portion main body for holding the intraocular lens without applying a force to the intraocular lens and releasing the holding of the intraocular lens held by the holding means.
- the holding means restricts the movement of the intraocular lens when the pressing of the pressing means is not applied, and the pressing means is applied when the pressing of the pressing means is applied.
- a restricting means for releasing the restriction of movement of the intraocular lens by being deformed in the movement direction of the intraocular lens.
- the holding means holds the intraocular lens at a position outside the push-out shaft where the plunger moves forward and backward.
- the pushing means pushes the intraocular lens held outside the push-out shaft of the plunger onto the push-out shaft of the plunger. .
- the restricting means is a convex member formed of a resin, and in order to support the lens surface of the intraocular lens, the inner surface from the periphery of the lens surface It has a thickness that extends in the horizontal direction toward the head and is deformed in the moving direction of the intraocular lens by being pressed by the pushing means.
- the cylindrical body further includes a placement portion on which the intraocular lens is placed when the intraocular lens is pushed by the plunger, and the placement portion.
- An opening provided in the vicinity of the mounting portion of the cylindrical portion main body for applying a viscoelastic substance to the cylindrical portion main body, and the holding means is moved or rotated with respect to the cylindrical portion main body, The inner lens is positioned on the mounting portion and the opening is closed.
- the holding means is a rotatable lid member for closing the opening provided above the mounting portion.
- the pushing means is configured to rotate the holding means for closing the opening, and before the opening is closed by the holding means. It is also used as an operation of pushing the intraocular lens into the placement portion.
- the pushing means has a push-out portion for pushing the intraocular lens held by the holding means onto the placement portion
- the holding means includes: There is an opening for passing through the push-out portion and abutting against the intraocular lens, and when the pushing means is pushed against the holding means, the push-out portion passes through the opening and enters the intraocular lens. When the lens is pushed, the restriction of the intraocular lens by the restriction means is released.
- the push-out portion and the opening are formed at positions corresponding to at least one of the optical portion and the support portion of the intraocular lens held by the holding means. It is characterized by that.
- a groove for pivoting the plunger is formed in the push-out portion.
- the opening is formed larger than an outer shape of the intraocular lens to which no stress is applied.
- an injector that can hold and release intraocular lenses with a simple configuration.
- FIG. 1 is an external perspective view of an intraocular lens insertion device (hereinafter referred to as an injector) 10.
- FIG. 2 is an explanatory view of the configuration of the pushing member (hereinafter referred to as a plunger) 40.
- 3A and 3B are side views of the injector 10.
- 4A to 4C are explanatory views of the configuration of the intraocular lens holding unit, and a perspective view of the intraocular lens 1 and each component is shown.
- the injector 10 includes a main body 10a for injecting the intraocular lens 1 into the eye and an intraocular lens holding unit 100 for holding (storage) the unused intraocular lens 1.
- the main body 10 a includes a hollow insertion tube portion (hereinafter referred to as an insertion portion) 20 that folds the intraocular lens 1 small, a hollow tube portion 30 that includes the insertion portion 20 at the tip, and front and rear with respect to the tube portion 30.
- the plunger 40 is attached so as to be movable in the direction and is configured to push the intraocular lens 1 into the eye.
- the insertion unit 20 includes a substantially cylindrical insertion tube 21 having a distal end 21a, a mounting table 22 on which the intraocular lens 1 is placed during use, and the intraocular lens 1 held by the intraocular lens holding unit 100 to the mounting table 22 side. And an opening 23 for passing through.
- the mounting table 22 is provided on the proximal end side of the insertion unit 20, and the opening 23 is provided in the vicinity of the mounting table 22. In the present embodiment, it is assumed that the opening 23 is provided above the mounting table 22.
- the insertion tube 21 is formed in a tapered shape whose inner diameter gradually decreases (thinner) toward the tip 21a.
- the opening 23 is formed in a width (shape) that does not cause problems such as breakage when the intraocular lens 1 held by the intraocular lens holding unit 100 is moved toward the main body 10a.
- the end 23a of the opening 23 is provided at a position outside the range in which the intraocular lens 1 extruded from the intraocular lens holding unit 100 can pass in an open state (a state where no stress is applied).
- the intraocular lens placed on the mounting table 22 through the opening 23 is bent slightly along the inner wall shape while passing through the inside of the insertion tube 21 by extrusion by the plunger 40, and is sent out from the tip 21a. .
- the intraocular lens holding unit 100 is rotatably attached to the main body 10a through a connection unit 25 provided on the distal end 21a side of the insertion tube 21.
- a lid 110 that is a holding means (holding member) formed in a shape that closes the opening 23 is prepared ( (See FIG. 3B).
- the intraocular lens holding unit 100 is rotated in a direction approaching the main body 10a, and when the lid 110 and the opening 23 are closed, the inside of the main body 10a is sealed.
- illustration is omitted here, it is assumed that the lid part 110 and the opening part 23 are closed together via a locking part.
- the opening 23 opens, and the mounting table 22 (or the inner wall of the insertion tube 21 with which the intraocular lens 1 contacts).
- the viscoelastic substance can be applied from the opening 23 to the mounting table 22.
- the lid portion 110 (side to be closed to the opening portion 23) of the intraocular lens holding portion 100 includes holding portions 111 and 112 that are restricting means (regulating members) (see FIG. 4B), and the holding portions 111 and 112 are included.
- the intraocular lens 1 is held outside the extrusion axis L of the plunger 40.
- the push-out axis L of the plunger 40 is an axis when the plunger 40 is moved back and forth in the front-rear direction when pushing the intraocular lens 1 into the eye.
- the lid 110 and the opening 23 are closed, the inside of the main body 10 a is sealed, and the intraocular lens 1 is positioned outside the push-out axis L on the mounting table 22.
- a detailed description of the configuration of the intraocular lens holding unit 100 will be described later.
- the connecting portion 25 one having a strength capable of opening and closing the intraocular lens holding portion 100 with respect to the main body 10a is used.
- a known hinge or the like may be used, and the main body 10a and the intraocular lens holding unit 100 may be connected by a thin bent portion of the same material.
- the plunger 40 is connected to the pressing portion 41 pressed by the surgeon, the shaft base portion 42 connected to the pressing portion 41, the push rod 43 connected to the shaft base portion 42, and the distal end of the push rod 43. It is comprised from the front-end
- the intraocular lens holding unit 100 releases the holding of the lid part 110 that holds the intraocular lens 1 and the intraocular lens 1 that is held by the lid part 110, so It is comprised by the combination with the pushing member (pushing means) 120 which has a some pushing part for pushing in toward.
- 4A to 4C show a state where the rear surface side of the lens surface of the intraocular lens 1 held by the lid 110 is the upper side (a state opposite to that in FIG. 1).
- FIG. 4A shows a one-piece type intraocular lens in which the optical part 1a and the pair of support parts 1b are integrally formed of a flexible material as the intraocular lens 1.
- the intraocular lens 1 a known lens that can be bent using the injector 10 is used.
- a three-piece intraocular lens or the like that is integrated after the optical part and the pair of support parts are formed as separate members may be used.
- the installation surface 110a located on the main body 10a side of the lid portion 110 is provided with columnar holding portions 111 and 112 extending in a direction perpendicular to the installation surface 110a in order to hold the intraocular lens 1.
- the holding unit 111 is formed at a position along (in contact with) the outer peripheral shape of the intraocular lens 1 in order to suppress horizontal movement of the intraocular lens 1 with respect to the installation surface 110a.
- the holding part 111 is formed in two places of the connection position of the optical part 1a and the support part 1b.
- the holding unit 112 is provided in a lateral position (a direction perpendicular to the extrusion direction) with respect to the optical unit 1a in contact with (or slightly outside) the outer edge of the optical unit 1a placed on the installation surface 110a.
- the holding portion 112 includes a columnar support portion 112a extending in a direction perpendicular to the installation surface 110a, and a regulating member 112b attached at a substantially right angle from the tip of the support portion 112a toward the inside.
- the regulating member 112b regulates the movement of the intraocular lens 1 (optical unit 1a) placed on the installation base 111 with respect to the pushing direction by the pushing unit described later, and holds it outside the pushing shaft L.
- the regulating member 112b is horizontal by a predetermined amount from the periphery of the optical unit 1a toward the inside (here, the center of the optical unit) in order to support the lens surface on the back side of the intraocular lens 1 with respect to the pushing direction. It is formed in a convex shape with a length extending in the direction.
- the lid 110 configured as described above is formed of resin.
- the restricting member 112b is formed with a thickness that has a flexibility to be deformed in the moving direction of the intraocular lens 1 when pressed by a pressing member 120 described later.
- the restricting member 112b is not deformed by the weight of the intraocular lens 1 or the force generated by the movement (fine movement) of the intraocular lens 1 on the installation surface 110a, and is easily deformed by the pressing force applied from the pushing member 120. It is formed in a thickness (thickness) having flexibility and strength that is deformed (bent around the connection position of the support portion 112a).
- the regulating member 112b is determined to have a length that prevents the distal end of the deformed regulating member 112b from being hooked on the pushing shaft L of the plunger 40 when the holding of the intraocular lens 1 by the holding unit 112 is released. .
- the restriction member 112b allows the intraocular lens 1 to be placed on the installation surface 110a. Vertical movement is suppressed.
- maintenance part 100 and the opening part 23 are closed, the intraocular lens 1 may be hold
- the restriction member 112b when the restriction member 112b is pressed through the intraocular lens 1 by the pushing operation of the pushing member 120 when the intraocular lens 1 is used, the restriction member 112b moves outward (along the movement direction of the intraocular lens). ) Is spread (deformed). Thereby, the intraocular lens 1 can pass through the position of the regulating member 112b before the deformation, and the holding by the holding unit 112 is released by the movement of the intraocular lens 1.
- the restricting member 112b Since the restricting member 112b is deformable and flexible, even when the peripheral edge (edge) of the optical unit 1a contacts the restricting member 112b when the intraocular lens 1 is moved toward the main body 10a, the restricting member 112b is added by contact. Due to the applied stress, damage such as scratches hardly occurs on the periphery of the optical unit 1a.
- the restriction member 112b may be configured to be deformable at least in a range in which the optical part 1a is in contact.
- the restriction member 112b is formed in a thickness or shape that is deformed from the connection position of the support part 112a.
- the restriction member 112b provided in the intraocular lens holding unit 100 suppresses the movement of the optical unit 1a in the left-right direction and the movement in the direction of approaching or moving away from the installation surface 110a. It is done. Therefore, it is possible to prevent the intraocular lens 1 from moving in the intraocular lens holding unit 100 during storage and being accidentally pushed toward the main body 10a.
- the height of the holding unit 111 from the installation surface 110a is determined so as to contact the outer periphery of the stored intraocular lens 1. Further, the holding portion 112 (support portion 112a) is formed such that the formation position of the regulating member 112b is higher than the height (thickness) of the lens surface (here, the back surface) of the intraocular lens 1 placed on the installation surface 110a. The Thereby, the intraocular lens 1 is stably held outside the extrusion shaft L in a state where no stress is applied. On the other hand, when the holding portions 111 and 112 are as short as possible, the pressing amount of the pressing portion 120 can be reduced when releasing the holding of the intraocular lens 1.
- the heights (lengths) of the holding portions 111 and 112 are such that when the opening 23 is closed by the lid portion 110, the height (length) is not applied to the pushing shaft L (injection shaft) of the plunger 40. )It has become. Thereby, the bending operation of the intraocular lens 1 by the plunger 40 is suitably performed while the lid portion 110 and the main body 10a are kept closed.
- the regulating member 112b When the length of the regulating member 112b is sufficiently short so as not to be applied to the extrusion shaft L, the regulating member 112b may be deformed outward once by the pressing of the pushing member 120 and may not return to the original state. good. Of course, after the restricting member 112b is deformed, the restoring force may return to the original state.
- a step-shaped groove 119 is formed at a position corresponding to the end 23 a of the opening 23 in the lid 110, and when the opening 23 is closed by the lid 110, the end 23 a and the groove 119 are formed.
- the inside of the main body 10a is sealed by fitting.
- a plurality of through holes 116 through which a plurality of pressing portions formed in the pressing member 120 are passed are formed in the lid portion 110.
- the through hole 116a is formed in a substantially arc shape corresponding to the position of the peripheral edge of the optical unit 1a placed on the lid 110, and is formed in a substantially circular shape corresponding to the center position of the optical unit 1a.
- the through holes 116b and the through holes 116c formed in a rectangular shape corresponding to the positions of the support portions 1b are provided.
- the through-hole 116 is formed corresponding to each part of the intraocular lens 1, and the entire intraocular lens 1 is pressed with good balance (uniformly) by passing the pressing portion.
- the through-hole 116 only needs to be provided at a position where the intraocular lens 1 can be pushed out by the pressing portion, and may be formed at a position corresponding to at least one of the optical portion and the support portion.
- the pushing member 120 is a member for pushing the intraocular lens 1 from the intraocular lens holding part 100 to the main body 10a side.
- the pushing member 120 applies a pressing force to the surgeon and the above-described through hole 116 (116a).
- Each of the extrusion portions 126a to 126c is formed so that its tip shape is substantially equal to (slightly smaller than) the shape of each of the through holes 116a to 116c so that it can pass through each of the through holes 116a to 116c.
- the pushing portion 126 passes through the through hole 116 and comes into contact with the intraocular lens 1.
- the pushing portion 126 of this embodiment is formed so that its width (diameter) gradually increases from the distal end to the proximal end (plate 121). Has been.
- the pushing member 120 and the lid portion 110 are kept in a predetermined positional relationship.
- the lid 110 and the pushing member 120 may be provided with a fitting portion such as an unevenness to keep the positional relationship between the lid 110 and the pushing member 120 when the intraocular lens 1 is stored.
- the pushing portion 126 has a length that can deform the restricting member 112b via the optical portion 1a, and the pushing portion 126 moves from the state where the lid portion 110 and the opening portion 23 are closed to the lid portion 110.
- the intraocular lens 1 is pushed until it comes into contact and is completely pushed into the main body 10a side, it is formed so as not to hang on the push-out axis L of the plunger 40.
- the intraocular lens 1 can be pushed into the eye with a single operation without removing the pushing member 120.
- a groove 129 extending in the front-rear direction (extrusion axis L of the plunger 40) of the intraocular lens 1 placed on the lid 110 is formed at the tip (contact surface) of the push-out portion 126c with which the support portion 1b is contacted.
- the groove 129 is formed in a shape that substantially matches the outer shape (diameter) of the push rod 43 of the plunger 40, and is used as a plunger axising mechanism when the intraocular lens 1 is used.
- the tip (contact surface) of the extruded portion 126a that is in contact with the optical portion 1a (surface side) is as large as possible, and is formed in a curved surface (R shape) that follows the shape of the optical portion 1a. preferable.
- the intraocular lens 1 is held in a state in which no stress is applied by the plurality of holding units of the intraocular lens holding unit 100.
- the intraocular lens can be moved to the main body 10a side (on the mounting table 22) by a simple operation by simply pushing the pushing member 120 from the state in which the opening portion 23 is blocked by the lid portion 110. .
- a viscoelastic substance may be applied to the inner wall surface (bottom surface, etc.) of the injector that comes into contact with the intraocular lens.
- the intraocular lens is sealed inside the injector, and it is difficult to apply a viscoelastic substance to the inner wall surface of the injector.
- Japanese Patent Application Laid-Open No. 2008-61677 discloses a configuration in which the inside of an injector is opened using a lid member, but it is difficult to apply a viscoelastic substance because an intraocular lens is previously placed on the bottom surface.
- the intraocular lens is held by a separate member from the injector body.
- the intraocular lens is mounted on the injector body. At the same time as mounting, an operation for making the intraocular lens pushable in the injector main body is required, which is troublesome.
- the viscoelastic substance can be easily applied to the mounting surface 22 in a state where the opening 23 is opened by the rotation of the intraocular lens holding unit 100.
- the viscoelastic material is uniformly spread in the insertion tube 21. Therefore, the application of the viscoelastic substance and the setting of the intraocular lens can be performed more efficiently than in the prior art.
- the injector 10 having the above-described configuration is formed by molding with a resin.
- the main body 10a and the intraocular lens holding unit 100 are separately molded and then connected by the connection unit 25.
- the lid part 110 and the pressing member 120 are individually molded.
- the regulating member 112b of the holding unit 112 may be integrally formed with the lid 110 (supporting part 112a) by molding or may be bonded after only the lid 110 (supporting part 112a) is formed first.
- the lid portion 110 may be formed by cutting.
- FIGS. 3A and 3B the rotation operation of the intraocular lens holding unit 100 will be described using the side view of the injector 10 shown in FIGS. 3A and 3B.
- the opening 23 is closed by the lid 110 and the insertion tube 21 is sealed.
- the intraocular lens 1 is held outside the extrusion shaft L by the holding portions 111 and 112 (regulating member 112b).
- the intraocular lens 1 is placed downward (the back side is downward) in the main body 10a.
- the holding portions 111 and 112 are not deformed by the weight and vibration of the intraocular lens 1, the intraocular lens 1 is stably held in the main body 10 a by the holding portions 111 and 112.
- the surgeon releases the holding of the intraocular lens 1 outside the pushing shaft L.
- the operator rotates the intraocular lens holding unit 100 away from the main body 10a as shown in FIG. 3B.
- the opening part 23 opens and the mounting table 22 (inner wall on the side where the intraocular lens is contacted) appears.
- the surgeon applies a viscoelastic substance to the mounting table 22 using a known syringe or the like.
- the opening 23 for applying the viscoelastic substance is widely formed, the surgeon can easily (evenly) apply the viscoelastic substance to the mounting table 22.
- the operator rotates the intraocular lens holding unit 100 so as to approach the main body 10a while pressing the plate 121 of the pushing member 120 in order to seal the inside of the main body 10a again.
- the groove 119 and the end 23a of the opening 23 are fitted, and the opening 23 is closed by the lid 110 (see FIG. 3A).
- the pushing portion 126 of the pushing member 120 gradually passes through each opening 116 of the lid portion 110.
- tip of the extrusion part 126 contacts the intraocular lens 1 the intraocular lens 1 will be pushed with the pushing force applied from the pushing member 120.
- the push-out portions 126a to 126c are uniformly in contact with the entire intraocular lens 1, so that the entire intraocular lens 1 is stably pushed into the main body 10a.
- FIGS. 5A to 5C are explanatory views of the holding release operation of the intraocular lens 1.
- FIG. 5A to 5C show cross-sectional views when the intraocular lens holding unit 100 is cut at the position of the holding unit 112.
- FIG. For convenience of explanation, illustration of the holding portions 126a, 126c and the like is omitted.
- the pushing portion 126 (only the holding portion 126b is shown in FIGS. 5A to 5C) by the pressing force applied to the plate 121.
- the pushing portion 126 is brought into contact with the intraocular lens 1 (the surface side of the optical portion 1a).
- the restricting member 112b is gradually deformed outward by a force pushed through the intraocular lens 1 (optical unit 1a).
- the regulating member 112b When the intraocular lens 1 is further pushed in, the regulating member 112b is further deformed outward along the movement direction of the intraocular lens 1. Then, the intraocular lens 1 passes through the position of the regulating member 112b before the deformation and moves to the main body 10a side (on the extrusion shaft L), whereby the holding of the intraocular lens 1 is released.
- the length of the regulating member 112b is sufficiently short, and the regulating member 112b after passing through the intraocular lens 1 remains in a deformed state.
- the pushing member 120 When the pushing member 120 is pushed further, the intraocular lens 1 is placed on the mounting table 22 (on the pushing shaft L) of the main body 10a as shown in FIG. 5C.
- the lens surface of the intraocular lens 1 is held in the direction in which the intraocular lens 1 is pressed and moved, and the holding portion that is deformed (opened and closed) by the pressing of the pressing portion is provided.
- the holding of the intraocular lens 1 is easily released by the operation.
- the operator removes the intraocular lens holding portion 100. And the bending operation of the intraocular lens can be continued.
- the groove 119 formed on the contact surface of the pushing portion 126 c becomes the plunger 40 (the pushing rod). 43) and is used as an axising mechanism. That is, the bending operation of the intraocular lens 1 can be suitably performed without removing the pushing member 120 that is pushed into the lid portion 110.
- the viscoelastic substance is suitably spread in the insertion tube 21, and the intraocular lens 1. The frictional resistance generated between the extrusion and the inner wall is suppressed.
- the intraocular lens 1 is simply placed on the mounting table 22 in conjunction with the rotation operation by the pushing member 120.
- the surgeon performs an operation for inserting the intraocular lens 1 into the patient's eye.
- the distal end 44 of the plunger 40 is brought into contact with the peripheral edge (edge) of the optical portion 1a. Further, when the pressing portion 41 is pressed, the optical portion 1 a is gradually bent (rounded) along the inner wall of the insertion tube 21. At this time, the axial movement by the groove 119 stabilizes the movement of the plunger 40 in the front-rear direction, and the optical part 1a is stably bent.
- the pressing portion 41 is further pressed, the intraocular lens 1 is moved toward the distal end 21a side while being bent.
- the optical unit 2 when the optical unit 2 is delivered from the tip 21a, the optical unit 2 is gradually opened in the sac. And if the front-end
- the viscoelastic substance is easily applied to the intraocular lens insertion device of the type in which the intraocular lens is held in advance.
- movement which moves the intraocular lens 1 on a mounting base can be performed by one operation
- the intraocular lens is stored, the intraocular lens is held using a holding unit having a simple configuration, and the holding of the intraocular lens is easily released in conjunction with the pushing operation.
- injector preset type or preload type injector
- the present invention is not limited to this.
- the injector main body and the intraocular lens holding unit are configured separately, the above-described configuration of the injector is applied, so that the viscoelastic substance can be easily applied to a necessary place.
- the holding and use of the intraocular lens can be easily performed.
- an injector (semi-preset type or semi-preload type injector) of the type in which the intraocular lens holding part forms part of the injector body (the intraocular lens holding part forms part of the inner wall of the insertion part of the main body)
- the configuration of the present invention is applicable.
- the intraocular lens holding portion connected to the injector body is rotatable, but the configuration is not limited thereto.
- a slide portion is provided that holds the intraocular lens holding portion so as to be slidable in the vertical direction with respect to the opening of the injector body. Accordingly, the viscoelastic substance can be easily applied from the position of the opening while the intraocular lens is held by the intraocular lens holding unit.
- the intraocular lens holding part is pushed into the injector main body, the intraocular lens holding part is brought close to the main body via the slide part, so that the opening is opened in the intraocular lens holding part (lid member). It may be blocked.
- the opening may be provided laterally (laterally) with respect to the placement portion.
- the injector 10 is hermetically sealed when the opening 23 is closed by the intraocular lens holding part 100 (lid part 110).
- the intraocular lens holding part 100, the main body 10a, May be sealed separately.
- the example in which the intraocular lens 1 is held outside the push-out shaft L of the plunger 40 by the intraocular lens holding unit 110 prepared separately from the injector body 10a is shown.
- a restricting member for suppressing the intraocular lens from moving in the front-rear direction on the extrusion axis L can be formed.
- a part of the optical part (edge) is brought into contact with the pushing operation of the plunger 40 and at a position avoiding the pushing shaft L of the plunger 40 by a fine movement such as vibration of the intraocular lens 1.
- a regulating member that is not deformed by the applied force but is deformed by the pressure applied from the plunger 40 is provided (the illustration of the regulating member is omitted here because the configuration of the regulating member is the same as described above). If it does in this way, the movement in the extrusion-axis L direction (front-back direction) of the intraocular lens 1 will be suppressed by the control member at the time of storage.
- the regulating member is deformed via the intraocular lens 1 by the pressure applied by the pushing operation of the plunger 40.
- the holding state can be easily released without imposing a load on the intraocular lens 1.
- the regulating member is provided at a position avoiding the push shaft L, the holding state can be easily released and the push operation into the eye can be performed simply by pushing the intraocular lens without removing the holding portion. Yes.
- the pressing unit moves the intraocular lens 1 in the moving direction. It is only necessary to provide a regulating member that is deformed by the applied pressure. That is, it is only necessary to form a regulating member similar to the above in the moving direction when the intraocular lens 1 is pushed from the holding state to the installation state (use state).
- the configuration in which the intraocular lens holding part is removable from the main body as in the present embodiment is used as a preset type injector as described above, and the type in which the operator installs the intraocular lens later. It can also be used as an injector. If it does in this way, it will become easy to use properly according to the use by one type of injector.
Abstract
Description
この種のインジェクターには、保管時の眼内レンズの移動を抑えるための保持部材(保持手段)が別部材で組み込まれており、使用時に保持部材が外されることで眼内レンズが使用可能な状態となる(特許文献1参照)。
(2) (1)の眼内レンズ挿入器具において、前記保持手段は、前記プランジャーが進退移動される押出軸外の位置で前記眼内レンズを保持することを特徴とする。
(3) (2)の眼内レンズ挿入器具において、前記押込手段は、前記プランジャーの押出軸外で保持された前記眼内レンズを前記プランジャーの押出軸上へと押し込むことを特徴とする。
(4) (3)の眼内レンズ挿入器具において、前記規制手段は樹脂で形成された凸状の部材であり、前記眼内レンズのレンズ面を支持するために、該レンズ面の周囲から内側に向けて水平方向に延び、前記押込手段による押圧によって前記眼内レンズの移動方向に向けて変形される肉厚を持つことを特徴とする。
(5) (4)の眼内レンズ挿入器具において、前記規制手段は、前記保持手段による前記眼内レンズの保持が解除されたときに、前記プランジャーの押出軸外に位置されることを特徴とする。
(6) (5)の眼内レンズ挿入器具において、前記筒部本体は更に、前記プランジャーで前記眼内レンズが押される際に前記眼内レンズが置かれる載置部と、該載置部に粘弾性物質を塗布するために前記筒部本体の前記載置部近辺に設けられる開口部とを有し、前記保持手段が筒部本体に対して移動又は回動されることで、前記眼内レンズが前記載置部上に位置すると共に前記開口部が塞がれることを特徴とする。
(7) (6)の眼内レンズ挿入器具において、前記保持手段は、前記載置部の上方に設けられた前記開口部を塞ぐための回動可能な蓋部材であることを特徴とする。
(8) (7)の眼内レンズ挿入器具において、前記押込手段は、前記開口部を塞ぐための前記保持手段の回動動作と、前記保持手段で前記開口部が塞がれた後の前記載置部への前記眼内レンズの押込み動作を兼用することを特徴とする。
(9) (8)の眼内レンズ挿入器具において、前記押込手段は、前記保持手段に保持された前記眼内レンズを前記載置部上へ押し込むための押出部を持ち、前記保持手段は、前記押出部を通過させて前記眼内レンズに当接させるための開口を持ち、前記保持手段に対して前記押込手段が押されたときに、前記押出部が前記開口を通過して前記眼内レンズが押されることで、前記規制手段による前記眼内レンズの規制が解除されることを特徴とする。
(10) (9)の眼内レンズ挿入器具において、前記押出部と前記開口は、前記保持手段に保持された前記眼内レンズの光学部及び支持部の少なくとも一方に対応する位置に形成されることを特徴とする。
(11) (10)の眼内レンズ挿入器具において、前記押出部には、前記プランジャーの軸出しを行うための溝が形成されていることを特徴とする。
(12) (11)の眼内レンズ挿入器具において、前記開口部は、応力が加えられていない前記眼内レンズの外形形状よりも大きく形成されることを特徴とする。
これにより蓋部110と開口部23が閉じ合わせられると、本体10a内が密閉されると共に、眼内レンズ1が載置台22上の押出軸L外に位置される。このような眼内レンズ保持部100の構成の詳細な説明は後述する。
更に、上記では、眼内レンズ保持部100(蓋部110)で開口部23が塞がれたときに、インジェクター10全体が密閉される構成であるが、眼内レンズ保持部100と本体10aとが別々に密閉されていても良い。
10 インジェクター
10a 本体
20 挿入筒部
21a 挿入部先端
22 載置台
23 開口部
30 筒部本体
40 プランジャー
100 眼内レンズ保持部
110 蓋部
112b 規制部材
119 溝
120 押込部
126 押出部
Claims (12)
- 眼内レンズを小さく折り畳む為の内壁を有する挿入部と,
該挿入部の先端から前記眼内レンズを押し出すためのプランジャーを持つ筒部本体とを備える眼内レンズ挿入器具において、
応力をかけずに前記眼内レンズを保持するために前記筒部本体に設けられる保持手段と、
該保持手段で保持された前記眼内レンズの保持を解除するために,前記眼内レンズに押圧を加えて押し込むための押込手段とを備え、
更に前記保持手段は、前記押込手段の押圧が加えられないときに前記眼内レンズの移動を規制し,前記押込手段の押圧が加えられたときに前記眼内レンズの移動方向に変形して前記眼内レンズの移動規制を解除するための規制手段とを持つことを特徴とする眼内レンズ挿入器具。 - 請求項1の眼内レンズ挿入器具において、
前記保持手段は、前記プランジャーが進退移動される押出軸外の位置で前記眼内レンズを保持することを特徴とする眼内レンズ挿入器具。 - 請求項2の眼内レンズ挿入器具において、
前記押込手段は、前記プランジャーの押出軸外で保持された前記眼内レンズを前記プランジャーの押出軸上へと押し込むことを特徴とする眼内レンズ挿入器具。 - 請求項3の眼内レンズ挿入器具において、
前記規制手段は樹脂で形成された凸状の部材であり、
前記眼内レンズのレンズ面を支持するために、該レンズ面の周囲から内側に向けて水平方向に延び、前記押込手段による押圧によって前記眼内レンズの移動方向に向けて変形される肉厚を持つことを特徴とする眼内レンズ挿入器具。 - 請求項4の眼内レンズ挿入器具において、
前記規制手段は、前記保持手段による前記眼内レンズの保持が解除されたときに、前記プランジャーの押出軸外に位置されることを特徴とする眼内レンズ挿入器具。 - 請求項5の眼内レンズ挿入器具において、
前記筒部本体は更に、
前記プランジャーで前記眼内レンズが押される際に前記眼内レンズが置かれる載置部と、
該載置部に粘弾性物質を塗布するために前記筒部本体の前記載置部近辺に設けられる開口部とを有し、
前記保持手段が筒部本体に対して移動又は回動されることで、前記眼内レンズが前記載置部上に位置すると共に前記開口部が塞がれることを特徴とする眼内レンズ挿入器具。 - 請求項6の眼内レンズ挿入器具において、
前記保持手段は、前記載置部の上方に設けられた前記開口部を塞ぐための回動可能な蓋部材であることを特徴とする眼内レンズ挿入器具。 - 請求項7の眼内レンズ挿入器具において、
前記押込手段は、前記開口部を塞ぐための前記保持手段の回動動作と、前記保持手段で前記開口部が塞がれた後の前記載置部への前記眼内レンズの押込み動作を兼用することを特徴とする眼内レンズ挿入器具。 - 請求項8の眼内レンズ挿入器具において、
前記押込手段は、前記保持手段に保持された前記眼内レンズを前記載置部上へ押し込むための押出部を持ち、
前記保持手段は、前記押出部を通過させて前記眼内レンズに当接させるための開口を持ち、
前記保持手段に対して前記押込手段が押されたときに、前記押出部が前記開口を通過して前記眼内レンズが押されることで、前記規制手段による前記眼内レンズの規制が解除されることを特徴とする眼内レンズ挿入器具。 - 請求項9の眼内レンズ挿入器具において、
前記押出部と前記開口は、前記保持手段に保持された前記眼内レンズの光学部及び支持部の少なくとも一方に対応する位置に形成されることを特徴とする眼内レンズ挿入器具。 - 請求項10の眼内レンズ挿入器具において、
前記押出部には、前記プランジャーの軸出しを行うための溝が形成されていることを特徴とする眼内レンズ挿入器具。 - 請求項11の眼内レンズ挿入器具において、
前記開口部は、応力が加えられていない前記眼内レンズの外形形状よりも大きく形成されることを特徴とする眼内レンズ挿入器具。
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EP12776696.2A EP2702967B1 (en) | 2011-04-28 | 2012-04-25 | Intraocular lens implantation tool |
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