JP2004261263A - Implement for inserting intraocular lens - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive and convenient intraocular lens inserting implement. <P>SOLUTION: The intraocular lens inserting implement for inserting an intraocular lens to an eye includes: an inserting part for inserting the intraocular lens from an incision formed in eyeball; an arranging part which is connected to the inserting part, so as to arrange the intraocular lens; a push-out means which is disposed so as to be movable forward and backward in the arranging part and an inserting part, and pushes out the intraocular lens arranged in the arranging part to the eyeball through the inserting part; and a connecting means which is disposed at the proximal end of the arranging part, so as to connect the arranging part to the distal end of a syringe. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an intraocular lens insertion device for inserting an intraocular lens into an eye.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as one of cataract surgery methods, a method of extracting a lens and then inserting an intraocular lens instead of the lens is generally used. In order to insert an intraocular lens, first, an incision for inserting the intraocular lens into the eyeball is provided, and the opaque crystalline lens inside the incision is crushed by an ultrasonic cataract surgery device and aspirated. Then, an intraocular lens is inserted through the incision where the lens was located.
[0003]
If the incision provided when the intraocular lens is inserted in this way, if the incision is large, a burden is imposed on the eyeball and, at the same time, it may cause postoperative astigmatism. For this reason, an intraocular lens insertion device called an injector for bending an intraocular lens formed of a soft material and inserting the intraocular lens from a small incision into the eye is known. . Such an injector consists of a metal main body (handpiece) provided with a mechanism for pushing out the intraocular lens and a disposable tip (cartridge) made of plastic resin. After installation, there is a separate type injector in which a tip is attached to a main body and used (see Patent Document 1). There is also known a disposable integrated injector in which both the tip and the main body are made of plastic tic resin, and the tip and the main body are discarded after use (Patent Document 2).
[Patent Document 1]
JP-A-5-103803 [Patent Document 2]
Japanese Patent Application Laid-Open No. 7-23991
[Problems to be solved by the invention]
However, when a plurality of operations are performed in one day, it is necessary to prepare a plurality of main units or wash and sterilize the main units (hand pieces) for each case in the former separate type injector. In a separate injector, since the main body is generally expensive, it is costly to arrange a plurality of the main bodies. In addition, cleaning and sterilizing the main body after the operation is troublesome.
[0005]
Further, in the latter disposable type integrated injector, washing and sterilization are not necessary, but a large product form requires a larger space for transportation and installation, which is not convenient.
In view of the above problems of the related art, it is an object of the present invention to provide an intraocular lens insertion device which is inexpensive and has excellent convenience.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the present invention is characterized by having the following configuration.
[0007]
(1) In an intraocular lens insertion device for inserting an intraocular lens into an eye, an insertion portion for inserting the intraocular lens from an incision wound provided in an eyeball, and an insertion portion connected to the insertion portion. An installation unit for installing the intraocular lens, and pushing means for pushing the intraocular lens placed on the installation unit so as to be able to advance and retreat within the installation unit and the insertion unit and into the eye through the insertion unit, A connection means provided at a base end of the installation section for connecting the installation section to a distal end of a syringe.
(2) In the intraocular lens insertion device of (1), the connecting means is a member having a cylindrical shape placed on the movement axis of the pushing means.
(3) In the intraocular lens insertion device of (2), the pushing means is a rod-shaped member having a diameter smaller than a diameter of a tip opening of the syringe, and one end of the pushing means is provided inside the connecting means. And extends to the outside.
(4) In the intraocular lens insertion device according to (1), the installation portion connects the first space in which the intraocular lens is installed and the syringe by connecting the syringe to the base end of the pushing means and the syringe. And a second space serving as a closed space, wherein the pushing means is moved forward by a predetermined pressure generated by pushing a plunger of the syringe.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic perspective view showing the appearance of an intraocular lens insertion device used in the present embodiment.
[0009]
Reference numeral 1 denotes an intraocular lens insertion device main body. The insertion device main body 1 is inserted from the side to be inserted into the eyeball into the insertion portion 2 for inserting the tip into an incision formed in the eyeball, the installation portion 3 for installing an intraocular lens, the insertion portion 2 and the inside of the installation portion 3. And a rod-shaped pushing member 5 for pushing out the intraocular lens from the distal end 2a of the insertion section 2 to the outside. The opening diameter of the distal end 2a of the insertion section 2 is smaller than the opening diameter of the side joined to the installation section 3, and the outer shape of the entire insertion section 2 is substantially conical. Further, the inside of the insertion section 2 has a hollow cylindrical shape through which the intraocular lens passes, and has a tapered shape whose diameter gradually decreases (narrows) toward the distal end 2a.
[0010]
Reference numeral 4 denotes a fitting portion that is provided on the base end side of the installation portion 3 and that connects the insertion device main body 1 and the syringe 10 by fitting with the distal end of the syringe 10. Reference numeral 6 denotes an opening / closing lid for installing the intraocular lens in the installation unit 3, and reference numeral 7 denotes a protective cap for preventing the pushing member 5 from being damaged. In addition, each component of the insertion device body 1 is molded of a material such as a plastic resin so as to be disposable.
[0011]
Reference numeral 10 denotes a general syringe used at the time of injection at a hospital. The syringe 10 includes a cylindrical portion 11 having an opening 11a at the tip, and a plunger 12 movably mounted inside the cylindrical portion 11. Note that a disposable type molded of a plastic resin or the like can be suitably used for the syringe 10.
[0012]
FIG. 2 is a diagram showing an internal configuration of the main body 1.
The installation section 3 has a box shape as a whole, and a guide path 3a for mounting the intraocular lens 20 and sending it to the front insertion section 10 is provided along the longitudinal direction of the installation section 3. ing. The width of the guide path 3 a is formed to be equal to or slightly larger than the diameter of the intraocular lens 20. The intraocular lens 20 is set on this guide path 21.
[0013]
The fitting portion 4 is a member having a cylindrical shape, and is attached to an end face on the base end side of the installation portion 3 so as to be on the same axis as the guide path 3a, as shown in FIG. Note that the inner diameter of the fitting portion 4 has an opening diameter enough to fit the tip of the syringe 10.
[0014]
The pushing member 5 is attached to the installation portion 3 such that one end of the pushing member 5 passes through the inside of the fitting portion 4, and can extend and retract on the axis of the guide path 3 a while extending outside the pushing member 5. I have. The diameter of the pushing member 5 extending from the installation section 3 to the outside is smaller than the opening diameter of the distal end opening 11 a of the syringe 10.
[0015]
FIG. 3 is a view showing a state in which the insertion device main body 1 and the plunger 10 are connected. As shown in FIG. 3, when connecting the insertion device main body 1 and the plunger 10, the tip of the syringe 10 is fitted with one end of the pushing member 5 inserted into the inside of the cylindrical portion 11 through the opening 11a. The fitting part 4 is fitted and connected. Since the distal end of the syringe 10 has a tapered shape, the fitting part 4 and the distal end of the syringe 10 can be tightly fitted to each other when fitted into the fitting part 4.
[0016]
Further, it is preferable to use a relatively hard material such as a plastic resin so that the pushing member 5 does not bend in the cylindrical portion 11 when the intraocular lens 20 is pushed out. Reference numeral 5a denotes a protrusion provided on the pushing member 5, and the protrusion 5a prevents the pushing member 5 from coming out of the fitting portion 4.
[0017]
In the conventional intraocular lens insertion device, the plunger for pushing the intraocular lens out of the insertion device is provided in the main body of the insertion device, so that the whole shape of the insertion device has been increased. However, by providing a general-purpose syringe with a mechanism for pushing out the intraocular lens as in the present embodiment, and having a minimal pushing-out mechanism on the insertion instrument body side, the size of the insertion instrument body is reduced. It can be made much smaller. Further, by minimizing the configuration of the insertion device main body, it is possible to manufacture the insertion device at a lower cost than before.
[0018]
The operation of the intraocular lens insertion device having the above configuration will be described.
First, in order to improve the sliding of the intraocular lens 20, an appropriate amount of a viscoelastic substance (for example, sodium hyaluronate) is previously applied to the intraocular lens 20 and the portion of the insertion device main body 1 where the intraocular lens passes. Thereafter, the intraocular lens 40 is grasped using forceps or the like, the lid 6 is opened, and the intraocular lens 20 is placed on the guide path 3a. At this time, the pushing member 5 is moved as far as possible to the base end side of the installation section 3.
[0019]
Next, the protective cap 7 is removed, and the fitting portion 4 and the tip of the syringe 10 are fitted together. At this time, on the syringe 10 side, the plunger 12 is pulled out from the cylindrical portion 11 by a predetermined amount so that the tip 12a of the plunger 12 does not come into contact with one end of the pushing member 5. The insertion device main body 1 and the syringe 10 are connected by fitting the distal end of the syringe 10 to the fitting portion 4 in a state where the pushing member 5 is passed through the distal end opening 11a of the syringe 10 inside. Thereafter, the plunger 12 is pushed into the cylindrical portion 11 until the tip of the pushing member 5 contacts the tip 12a of the plunger 12.
[0020]
With the insertion instrument body 1 and the syringe 10 connected to each other, the surgeon holds the cylindrical portion 11 of the syringe 10 and inserts it through an incision provided in the patient's eye from which the crystalline lens has been removed by an ultrasonic cataract surgery device or the like in advance. The tip of the part 2 is inserted into the eye. After inserting the distal end of the insertion section 2 into the patient's eye, the plunger 12 is slowly pushed forward from the rear (front end side). As the plunger 12 is pushed into the inside of the tubular portion 11 toward the tip, the pushing member 5 is pushed forward. The pushing member 5 pushed by the plunger 12 moves toward the front end on the guide path 3a, and pushes the intraocular lens 20 toward the front insertion portion 2. When the intraocular lens 20 enters the insertion section 2 and the opening diameter of the insertion section becomes narrow, the intraocular lens 20 is bent (rolled) along the wall surface inside the insertion section 2. As a result, the intraocular lens 20 bent slightly from the distal end 2a of the insertion section 2 is pushed into the eye.
[0021]
In this embodiment, the insertion device main body 1 and the syringe 10 are connected and integrated by fitting each other, but the present invention is not limited to this. For example, by forming a male screw on the outer wall of the fitting portion 4 and screwing it into a syringe having a female screw portion at the tip, the insertion device main body and the syringe can be more firmly connected.
[0022]
Furthermore, although the insertion device main body of this embodiment inserts an intraocular lens before an operation, it is not limited to this. The main body of the insertion device can be used as an intraocular lens case, and an intraocular lens having a predetermined power can be put in the main body of the insertion device at the time of factory shipment. By using the insertion instrument body as the intraocular lens case in this way, it is possible to save the trouble of installing the intraocular lens before the operation.
[0023]
Further, in the present embodiment, the pushing member 5 on the insertion instrument main body side is directly pushed by using the plunger on the syringe side, but the present invention is not limited to this. For example, the intraocular lens can be pushed out from the distal end of the insertion portion by using air pressure or the like generated when pushing the inside of the syringe with a plunger. Hereinafter, an embodiment in which an intraocular lens is extruded by air pressure using a syringe as a second embodiment will be described with reference to FIG. Components having the same functions as those in the above-described embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
[0024]
FIG. 4 is a cross-sectional view in a state where the intraocular lens insertion device and the syringe are connected.
Reference numeral 30 denotes an installation section for installing the intraocular lens 20, a first space 30a for installing the intraocular lens 20, and a second space for extruding the pushing member 40 to the distal end side by air pressure or the like. 30b are provided. The insertion portion 2 is attached to the distal end side of the first space 30a, and the fitting portion 4 is attached to the proximal end side of the second space 30b. The pushing member 40 is movably installed in the second space 30b, and the tip end 40a extends to the first space 30a through the small hole 31 connecting the first space 30a and the second space 30b. . The proximal end surface 40b of the pushing member 40 is formed so as to completely separate the second space 30b, and the end surface 40b seals the space on the side where the syringe 10 is attached. I have. An open / close lid (not shown) (not shown) is provided above the first space 30a. When the intraocular lens 20 is installed, the open / close lid is opened.
[0025]
With such a configuration, when the plunger 12 of the syringe 10 connected to the insertion device main body 1 is pushed in, the end surface 40b of the push-out member 40 is pushed by the pressure (movement) of the air inside the cylindrical portion 11. The pushing member 40 moves forward (toward the distal end). When the pushing member 40 moves forward, the intraocular lens 20 is pushed toward the insertion portion 2 by the pushing member 40, and is pushed out from the distal end of the insertion portion 2 in a bent state. In the second embodiment, the extruding member is moved using air pressure. However, the present invention is not limited to this, and a gas harmless to a living body such as nitrogen may be used. Also, if the syringe and the insertion device are previously connected to the syringe with water or physiological saline, etc., the pushing member can be moved by the pressure against which the liquid is pushed by the plunger.
[0026]
【The invention's effect】
As described above, according to the present invention, since the size of the intraocular lens insertion device main body can be reduced, it can be manufactured at low cost and is excellent in convenience.
[Brief description of the drawings]
FIG. 1 is a schematic external view showing an intraocular lens insertion device according to an embodiment.
FIG. 2 is a diagram showing an internal configuration of the intraocular lens insertion device according to the embodiment.
FIG. 3 is a view showing a state where a syringe is connected to the intraocular lens insertion device.
FIG. 4 is a diagram showing a modified example of the intraocular lens insertion device according to the embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Intraocular lens insertion instrument main body 2 Insertion part 3 Installation part 4 Fitting part 5 Pushing member 10 Syringe 20 Intraocular lens

Claims (4)

In an intraocular lens insertion device for inserting an intraocular lens into an eye, an insertion portion for inserting the intraocular lens from an incision wound provided in an eyeball, the intraocular lens being connected to the insertion portion, An installation section for installing a lens, pushing means for pushing an intraocular lens installed in the installation section and the insertion section so as to be able to advance and retreat and placed on the installation section into the eye through the insertion section, and the installation section A connection means provided at a base end of the intraocular lens for connecting the installation section to a distal end of a syringe. 2. The intraocular lens insertion device according to claim 1, wherein the connecting means is a member having a cylindrical shape placed on the movement axis of the pushing means. 3. The intraocular lens insertion device according to claim 2, wherein the pushing means is a rod-shaped member having a diameter smaller than a diameter of a distal end opening of the syringe, and one end of the pushing means is inserted through the inside of the connecting means. An intraocular lens insertion device characterized by extending outwardly. 2. The intraocular lens insertion device according to claim 1, wherein the installation portion is a closed space between a first space in which the intraocular lens is installed and a base end of the pushing means and a syringe by connecting the syringe. An intraocular lens insertion device, wherein the pushing means is moved forward by a predetermined pressure generated by pushing a plunger of the syringe.

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