JP2006014963A - Intraocular lens insertion apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an intraocular lens insertion apparatus having a simple structure and surely preventing the movement of an intraocular lens from an installation part of an intraocular lens introducing tube to an insertion opening side or its disengagement to the outside of the intraocular lens introducing tube. <P>SOLUTION: The inside diameter B of the intraocular lens introducing tube 2 in the insertion opening part 3 is formed smaller than the inside diameter A of the intraocular lens introducing tube 3 in the installation part 5. The inside diameter of the intraocular lens introducing tube 2 is made maximum in the installation part 5 to surely prevent the movement of the intraocular lens from the installation part 5 of the intraocular lens introducing tube 2 to the side of the insertion opening part 3 or its disengagement to the outside of the intraocular lens introducing tube 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an intraocular lens insertion device used when an intraocular lens is inserted into an eyeball.

  In cataract surgery, a method is widely used in which an opaque lens is removed by ultrasonic emulsification absorption (PEA), and then an intraocular lens is implanted in the eye instead of the removed lens. The intraocular lens includes an optical unit that functions as a lens, and a support unit that holds the intraocular lens on the eye axis in the eye. The intraocular lens is roughly classified into a hard intraocular lens whose optical part is made of a hard material such as polymethylmethacrylate, and a soft intraocular lens whose optical part is made of a soft material such as soft acrylic or silicone.

  When a hard intraocular lens is inserted into the eye, an incision having a width equal to or greater than the diameter of the optical part of about 6 mm is formed in the cornea or sclera, and the intraocular lens is inserted through the wound. . On the other hand, when inserting a soft intraocular lens, the soft intraocular lens can be folded softly, so that it can be inserted through an incision having a width of 4 mm or less smaller than the diameter of the optical part. it can. In addition, when a dedicated insertion instrument is used, it is possible to insert from an incision with a smaller width.

  By reducing the width of the incision, the burden on the patient due to surgery is reduced, corneal astigmatism due to surgery is less likely to occur, and the possibility of infection through the incision is reduced. For these reasons, soft intraocular lenses tend to be preferred.

  A dedicated insertion instrument for an intraocular lens is called an injector, and is generally composed of an injector body and an insertion tube. The insertion tube portion has a substantially cylindrical intraocular lens introduction tube, and the intraocular lens introduction tube includes an insertion port portion into which the intraocular lens is inserted and a discharge port portion through which the intraocular lens is discharged, The inner lens introduction tube has an inner diameter that decreases from the insertion port portion toward the discharge port portion. And the installation part in which an intraocular lens is temporarily installed is provided in the insertion port part side of the intraocular lens introduction tube. This insertion cylinder part is often used in a disposable manner from the viewpoint of hygiene, but an injector main body and an insertion cylinder part are integrally configured, and an injector that is disposable is also sold.

  When using the injector, the intraocular lens introduction tube of the insertion tube is filled with a liquid called viscoelastic material that improves lubricity, and an intraocular lens is installed in the installation part, and this intraocular lens is inserted into the injector. The intraocular lens is moved into the eye through an insertion tube part in which the tip part is inserted into the eye.

  However, since the inner diameter of the intraocular lens introduction tube of the insertion tube portion is configured to become smaller from the insertion port portion toward the discharge port portion, when the intraocular lens is installed in the installation portion, the intraocular lens has the inner diameter of the inner diameter. There was a tendency to move to the large insertion slot side. In addition, even when the inner diameter in the vicinity of the installation portion is configured to be a constant size, the intraocular lens may move to the insertion port side. Since the inner surface of the intraocular lens introduction tube has high lubricity, this tendency is further increased when the intraocular lens is folded and deformed and installed on the installation part. There was a risk of jumping out.

As a structure of the insertion cylinder part that can solve such a problem, Patent Document 1 discloses a structure including an installation part connected to an insertion port of the insertion cylinder part via a hinge.
US Pat. No. 6,537,283

  In the insertion cylinder part disclosed in Patent Document 1, the intraocular lens is held by a flexible installation part, and the intraocular lens is fitted to the insertion port of the insertion cylinder part connected by a hinge. It is used by being pushed out to the insertion port of the insertion tube portion. With this configuration, the intraocular lens can be prevented from jumping out of the insertion tube portion, but it is necessary to provide an installation portion connected to the insertion tube portion via a hinge, and the structure of the insertion tube portion is complicated. Therefore, there is a problem that the manufacturing cost is high.

  Therefore, the present inventor has a simple structure and ensures that the intraocular lens moves from the setting part of the intraocular lens introduction tube to the insertion port side or jumps out of the intraocular lens introduction tube. An object of the present invention is to provide an intraocular lens insertion device that can be prevented.

  The intraocular lens insertion device according to claim 1 is an intraocular lens insertion device provided with a substantially cylindrical intraocular lens introduction tube for introducing an intraocular lens, and the intraocular lens is inserted into the intraocular lens introduction tube. An insertion port portion and a discharge port portion from which the intraocular lens is discharged, and an installation portion for temporarily installing the intraocular lens is provided on the insertion port side of the intraocular lens introduction tube, An inner diameter of the intraocular lens introduction tube is configured to become smaller from the installation portion toward the discharge port portion, and an inner diameter of the intraocular lens introduction tube in the insertion port portion is the intraocular in the installation portion. It is characterized by being formed smaller than the inner diameter of the lens introduction tube.

  The intraocular lens insertion device according to claim 2 is an intraocular lens insertion device provided with a substantially cylindrical intraocular lens introduction tube for introducing an intraocular lens, and the intraocular lens is inserted into the intraocular lens introduction tube. An insertion port portion and a discharge port portion from which the intraocular lens is discharged, and an installation portion for temporarily installing the intraocular lens is provided on the insertion port side of the intraocular lens introduction tube, The inner diameter of the intraocular lens introduction tube is configured to decrease from the installation portion toward the discharge port portion, and protrudes from the inner surface of the intraocular lens introduction tube between the insertion port portion and the installation portion. Is provided.

  The intraocular lens insertion device according to claim 3 is an intraocular lens insertion device provided with a substantially cylindrical intraocular lens introduction tube for introducing an intraocular lens, and the intraocular lens is inserted into the intraocular lens introduction tube. An insertion port portion and a discharge port portion from which the intraocular lens is discharged, and an installation portion for temporarily installing the intraocular lens is provided on the insertion port side of the intraocular lens introduction tube, The intraocular lens introduction tube is configured such that an inner diameter of the intraocular lens introduction tube decreases from the installation unit toward the discharge port unit, and the intraocular lens introduction tube between the installation unit or the insertion port unit and the installation unit. It is characterized in that irregularities are formed on the inner surface.

  The intraocular lens insertion device according to a fourth aspect is characterized in that, in any one of the first to third aspects, the intraocular lens is installed in a deformed state in the installation portion.

  An intraocular lens insertion device according to a fifth aspect is characterized in that the inner surface of the intraocular lens introduction tube is coated in any one of the first to fourth aspects.

  In the intraocular lens insertion device according to claim 1, the inner diameter of the intraocular lens introduction tube in the insertion port is formed to be smaller than the inner diameter of the intraocular lens introduction tube in the installation portion. Since it is the maximum at the installation part, it is possible to reliably prevent the intraocular lens from moving from the installation part of the intraocular lens introduction tube to the insertion port side or jumping out of the intraocular lens introduction tube. it can.

  The intraocular lens insertion device according to claim 2 is provided with a projection on the inner surface of the intraocular lens introduction tube between the insertion port and the installation unit, so that the movement of the intraocular lens toward the insertion port can be performed by the projection. Therefore, it is possible to reliably prevent the intraocular lens from moving from the setting part of the intraocular lens introduction tube to the insertion port side or jumping out of the intraocular lens introduction tube.

  The intraocular lens insertion device according to claim 3 is formed by forming irregularities on the inner surface of the intraocular lens introduction tube between the installation part or the insertion port and the installation part, so that the intraocular lens introduction tube in the part where the irregularities are formed. Since the lubricity between the inner surface and the intraocular lens is reduced, the intraocular lens moves from the installation part of the intraocular lens introduction tube to the insertion port side or jumps out of the intraocular lens introduction tube. This can be surely prevented.

  The intraocular lens insertion device according to claim 4 is configured to be installed in a state where the intraocular lens is deformed in the installation unit, so that the intraocular lens can be more effectively removed from the installation unit of the intraocular lens introduction tube. Moving to the insertion port side or jumping out of the intraocular lens introduction tube is prevented.

  In the intraocular lens insertion device according to the fifth aspect, the inner surface of the intraocular lens introduction tube is coated, so that the intraocular lens is moved more effectively from the setting part of the intraocular lens introduction tube to the insertion port side. Or jumping out of the intraocular lens introduction tube.

  Examples of the intraocular lens insertion device of the present invention will be described below.

  A first embodiment of the intraocular lens insertion device of the present invention will be described. In FIG. 1 showing a perspective view and FIG. 2 showing a cross-sectional view, reference numeral 1 denotes an insertion tube portion. The insertion tube portion 1 includes a substantially cylindrical intraocular lens introduction tube 2 therein. The intraocular lens introduction tube 2 includes an insertion port portion 3 into which the intraocular lens is inserted and a discharge port portion 4 through which the intraocular lens is discharged, and on the insertion port portion 3 side of the intraocular lens introduction tube 2. An installation unit 5 is provided in which the intraocular lens is temporarily installed.

  The insertion port 3 is for loading a folded intraocular lens, and an insertion groove 6 is provided there. The insertion groove 6 is a groove for holding and loading an intraocular lens with an insulator, and an intraocular lens that is easily folded by inserting the insulator into the insertion groove 6 is inserted from the insertion port portion 3 to the installation portion 5. Can be loaded. Further, the inside of the intraocular lens introduction tube 2 is tubular because an intraocular lens installed in a state of being folded and deformed by the installation unit 5 passes, and the inner diameter of the intraocular lens introduction tube 2 is It is comprised so that it may become small toward the discharge port part 4 from the installation part 5. FIG. Further, the inner diameter B of the intraocular lens introduction tube 2 in the insertion port 3 is formed smaller than the inner diameter A of the intraocular lens introduction tube 2 in the installation part 5.

  The soft intraocular lens that can use the insertion tube portion 1 is not particularly limited as long as it is a soft material, and for example, a silicone resin, an acrylic resin, a hydrogel, or the like can be used.

  Further, a discharge port portion 4 is formed at the tip of the intraocular lens introduction tube 2, and this discharge port portion 4 is inserted into the incision of the eyeball. Therefore, the insertion tube portion 1 needs to be made of a material that does not adversely affect the human body, and is made of, for example, polyalkene such as polypropylene. The inner surface of the intraocular lens introduction tube 2 is subjected to a hydrophilic coating process.

  The blades 7 and 8 are for mounting the insertion tube portion 1 on the insertion tube portion mounting portion 28 provided at the tip of the injector body 27 as shown in FIG. By holding, the insertion tube portion 1 and the injector body 27 are integrated. Thus, the insertion tube portion 1 and the injector body 27 constitute an intraocular lens insertion instrument.

  Further, the injector body 27 is provided with an extrusion rod 29. The distal end of the push rod 29 is thin (not shown), and the distal end can be inserted into the intraocular lens introduction tube 2 of the insertion tube portion 1. The push rod 29 is used to insert an intraocular lens into the eyeball from the outlet 4.

  Below, the manufacturing method of the insertion cylinder part 1 is demonstrated. The insertion tube portion 1 is formed by injection molding. At this time, the thickness of the intraocular lens introduction tube 2 between the installation unit 5 and the insertion port 3 is designed to be thicker than the thickness of the intraocular lens introduction tube 2 between the installation unit 5 and the discharge port 4. Keep it as Then, due to the shrinkage after molding, the inner diameter B of the intraocular lens introduction tube 2 at the insertion port 3 becomes smaller than the inner diameter A at the installation portion 5. By designing a mold for injection molding in consideration of such molding shrinkage, it is possible to mold even a shape that is generally difficult by injection molding. The resin used in this injection molding is preferably polypropylene or polystyrene suitable for injection molding.

  Further, in order to make the inner diameter B of the intraocular lens introduction tube 2 in the insertion port 3 smaller than the inner diameter A in the installation portion 5, the thickness of the intraocular lens introduction tube 2 at the time of injection molding is adjusted as described above. Instead, as shown in FIG. 4, the insertion port portion 3 side from the installation portion 5 is constituted by a substantially cylindrical insertion port member 1A as a separate part, and the insertion port member 1A is joined to the insertion tube portion 1. May be. In this case, the insertion port member 1 </ b> A having an inner diameter B smaller than the inner diameter A in the installation portion 5 is used. At the time of this joining, as shown in FIG. 4, the convex portion 9 may be provided in the insertion port member 1A, the concave portion 10 may be provided in the insertion tube portion 1, and the convex portion 9 and the concave portion 10 may be fitted. Or you may provide a recessed part in 1 A of insertion port members, and a convex part in the insertion cylinder part 1. FIG. By fitting the convex portion 9 and the concave portion 10 in this manner, the alignment of the insertion tube portion 1 and the insertion port member 1A is facilitated.

  Or you may comprise so that the insertion port member 1A in which the intraocular lens was loaded previously may be fitted to the insertion cylinder part 1. FIG. In this case, the length of the insertion port member 1A needs to be long enough to accommodate the intraocular lens. By comprising in this way, the mode which packages with the intraocular lens put in 1 A of insertion opening members, and sells an intraocular lens can also be taken.

  As shown in FIG. 5, the insertion port member 1 </ b> A and the insertion tube portion 1 are fitted with a holding portion 9 </ b> A in the insertion port member 1 </ b> A, and the outside of the insertion tube portion 1 is held by the holding portion 9 </ b> A. Accordingly, the insertion port member 1A and the insertion tube portion 1 may be configured to be fitted.

  As described above, the intraocular lens insertion device of the present embodiment is the intraocular lens introduction tube 2 provided with the substantially cylindrical intraocular lens introduction tube 2 for introducing the intraocular lens. Includes an insertion port 3 into which the intraocular lens is inserted and a discharge port 4 through which the intraocular lens is discharged, and the intraocular lens is temporarily disposed on the insertion port 3 side of the intraocular lens introduction tube 2. Is provided so that the inner diameter of the intraocular lens introduction tube 2 decreases from the installation portion 5 toward the discharge port portion 4, and the insertion port portion 3 The inner diameter B of the intraocular lens introduction tube 2 is formed to be smaller than the inner diameter A of the intraocular lens introduction tube 3 in the installation portion 5, and the inner diameter of the intraocular lens introduction tube 2 is maximum in the installation portion 5. Therefore, the intraocular lens is installed in the intraocular lens introduction tube 2. Move from Part 5 to the insertion opening 3 side, it is possible to reliably prevent the stick out to the outside of the intraocular lens inlet pipe 2.

  In addition, since the intraocular lens is installed in the installation unit 5 in a deformed state, the intraocular lens is more effectively moved from the installation unit 5 of the intraocular lens introduction tube 2 to the insertion port 3 side. It is prevented from moving or jumping out of the intraocular lens introduction tube 2.

  Furthermore, since the inner surface of the intraocular lens introduction tube 2 is coated, the intraocular lens can be moved more effectively from the installation part of the intraocular lens introduction tube 2 to the insertion port 3 side, or the intraocular lens can be introduced. Jumping out of the tube 2 is prevented.

  Next, a second embodiment will be described. In addition, the same code | symbol is attached | subjected to the part which is common in the said 1st Example, and the detailed description is abbreviate | omitted.

  A cross section of the intraocular lens insertion device of this example is shown in FIG. In this embodiment, a projection 11 is provided on the inner surface of the intraocular lens introduction tube 2 between the insertion port 3 and the installation portion 5. The protrusion 11 has such a size that the intraocular lens installed on the installation unit 5 cannot move to the insertion port unit 3 side, and may be provided at least in one place. The protrusion 11 is formed inward from the intraocular lens introduction tube 2.

  The protrusion 11 can be formed by deforming the insertion cylinder 1 by pressing a metal fitting heated from the side surface of the injection-molded insertion cylinder 1. Alternatively, a protrusion member may be prepared as a separate member, and this may be joined to the intraocular lens introduction tube 2 to form the protrusion 11.

  Further, the protrusion 11 may be formed in a cross-sectional shape such as the protrusion 11A shown in FIG. 7 or the protrusion 11B shown in FIG. That is, the angle formed between the side surfaces of the projections 11A and 11B and the inner surface of the intraocular lens introduction tube 2 on the insertion port 3 side is small, and the side surface of the projections 11A and 11B and the inner surface of the intraocular lens introduction tube 2 on the discharge port 4 side. Is formed at a substantially right angle. By forming the projections 11A and 11B in such a shape, it is easy to insert the intraocular lens from the insertion port 3 side to the discharge port 4 side, and once the intraocular lens is inserted, the insertion port 3 It becomes difficult for the intraocular lens to jump out to the side.

  As described above, the intraocular lens insertion device of the present embodiment is the intraocular lens introduction tube 2 provided with the substantially cylindrical intraocular lens introduction tube 2 for introducing the intraocular lens. Includes an insertion port 3 into which the intraocular lens is inserted and a discharge port 4 through which the intraocular lens is discharged, and the intraocular lens is temporarily disposed on the insertion port 3 side of the intraocular lens introduction tube 2. And an inner diameter of the intraocular lens introduction tube 2 is configured to decrease from the installation portion 5 toward the discharge port portion 4, and the insertion port portion 3 and the insertion port portion 3. A projection 11 is provided on the inner surface of the intraocular lens introduction tube 2 between the installation portions 5, and the projection 11 suppresses the movement of the intraocular lens toward the insertion port 3 side. The lens moves from the installation part 5 of the intraocular lens introduction tube 2 to the insertion port part 3 side, Jumping out of the intraocular lens introduction tube 2 can be reliably prevented.

  Next, a third embodiment will be described. In addition, the same code | symbol is attached | subjected to the part which is common in the said 1st Example and 2nd Example, The detailed description is abbreviate | omitted.

  FIG. 9 shows a cross section of the intraocular lens insertion device of this example. In this embodiment, irregularities 12 are formed on the inner surface of the intraocular lens introduction tube 2 between the insertion port 3 and the installation portion 5. The unevenness 12 is composed of a collection of a large number of minute unevennesses, and inhibits the lubricity of the inner surface of the intraocular lens introduction tube 2, and the intraocular lens installed in the installation part 5 faces the insertion port 3 side. It is comprised so that it may move. The unevenness 12 may be provided in the installation part 5 in addition to between the insertion port part 3 and the installation part 5, or even if provided only in the installation part 5, the movement of the intraocular lens can be suppressed. .

  The irregularities 12 can be formed by performing a partial process on the injection mold of the insertion tube portion 1. Specifically, the portion corresponding to the inner surface of the intraocular lens introduction tube 2 between the mold installation part 5 or the insertion port part 3 and the installation part 5 is subjected to a discharge treatment, or sandpaper, diamond paste or the like. Polishing with

  As described above, the intraocular lens insertion device of the present embodiment is the intraocular lens introduction tube 2 provided with the substantially cylindrical intraocular lens introduction tube 2 for introducing the intraocular lens. Includes an insertion port 3 into which the intraocular lens is inserted and a discharge port 4 through which the intraocular lens is discharged, and the intraocular lens is temporarily disposed on the insertion port 3 side of the intraocular lens introduction tube 2. And an inner diameter of the intraocular lens introduction tube 2 is configured so that the inner diameter of the intraocular lens introduction tube 2 decreases from the installation unit 5 toward the discharge port unit 4, and the installation unit 5 or the insertion unit is inserted. Concavities and convexities 12 are formed on the inner surface of the intraocular lens introduction tube 2 between the mouth portion 3 and the installation portion 5, and the inner surface of the intraocular lens introduction tube 2 and the intraocular lens in the portion where the irregularities 12 are formed. The intraocular lens is guided by the intraocular lens. It is possible to reliably prevent the insertion tube 2 from moving from the installation portion 5 to the insertion port portion 3 side or jumping out of the intraocular lens introduction tube 2.

  As mentioned above, although the Example of this invention was described, this invention is not limited to the said Example, A various deformation | transformation implementation is possible. For example, in each of the above embodiments, the intraocular lens insertion device in which the insertion tube portion 1 and the injector body 27 are configured separately has been described as an example. It may be a formed structure.

It is a perspective view which shows the insertion cylinder part of 1st Example of the intraocular lens insertion instrument of this invention. It is sectional drawing same as the above. It is a perspective view which shows a mode that an insertion cylinder part same as the above is mounted | worn with an injector main body. It is a top view of the insertion cylinder part which shows an example of the manufacturing method of an intraocular lens insertion instrument same as the above. It is a top view which shows a modification same as the above. It is sectional drawing which shows 2nd Example same as the above. It is sectional drawing which shows a modification same as the above. It is sectional drawing which shows a modification same as the above. It is sectional drawing which shows 3rd Example same as the above.

Explanation of symbols

2 Intraocular lens introduction tube 3 Insertion port 4 Discharge port 5 Installation unit
11 Protrusion
12 Concavity and convexity A, B Inner diameter

Claims (5)

In the intraocular lens insertion device having a substantially cylindrical intraocular lens introduction tube for introducing the intraocular lens, the intraocular lens introduction tube is discharged from an insertion port portion into which the intraocular lens is inserted and the intraocular lens. And an installation portion for temporarily installing an intraocular lens is provided on the insertion port side of the intraocular lens introduction tube, and an inner diameter of the intraocular lens introduction tube is The inner diameter of the intraocular lens introduction tube at the insertion port is smaller than the inner diameter of the intraocular lens introduction tube at the installation portion. An intraocular lens insertion device. In the intraocular lens insertion device having a substantially cylindrical intraocular lens introduction tube for introducing the intraocular lens, the intraocular lens introduction tube is discharged from an insertion port portion into which the intraocular lens is inserted and the intraocular lens. And an installation portion for temporarily installing an intraocular lens is provided on the insertion port side of the intraocular lens introduction tube, and an inner diameter of the intraocular lens introduction tube is An intraocular lens comprising a projection formed on an inner surface of the intraocular lens introduction tube between the insertion port portion and the installation portion, and configured so as to become smaller toward the discharge port portion. Insertion instrument. In the intraocular lens insertion device having a substantially cylindrical intraocular lens introduction tube for introducing the intraocular lens, the intraocular lens introduction tube is discharged from an insertion port portion into which the intraocular lens is inserted and the intraocular lens. And an installation portion for temporarily installing an intraocular lens is provided on the insertion port side of the intraocular lens introduction tube, and an inner diameter of the intraocular lens introduction tube is It is configured so as to become smaller toward the discharge port portion, and an unevenness is formed on the inner surface of the intraocular lens introduction tube between the installation portion or the insertion port portion and the installation portion. Intraocular lens insertion device. The intraocular lens insertion device according to any one of claims 1 to 3, wherein the intraocular lens is installed in the installation unit in a deformed state. The intraocular lens insertion device according to any one of claims 1 to 4, wherein an inner surface of the intraocular lens introduction tube is coated.

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