JPH0511856Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a bandage used for maintaining the anterior chamber space during intraocular surgical operations in the ophthalmology field.

[Conventional technology]

In ophthalmic surgeries such as cataract removal surgery, iris removal surgery, and intraocular lens implantation surgery, incisions are made in the cornea, sclera, conjunctiva, etc., and surgical instruments are inserted into the eye through these incisions. A surgical operation is performed. The anterior chamber of the eye is filled with aqueous humor, and when the aqueous humor flows out during surgical operations, the shape of the anterior chamber space is reduced and deformed, causing other tissues and surgical instruments to come into contact with the corneal endothelium.
However, unlike normal cells, these corneal endothelial cells do not undergo cell division, and once the above-mentioned contact occurs, the contact portion is destroyed or damaged. When this damage occurs, repair is performed by swelling endothelial cells surrounding the damaged area, but if the damaged area is large, there is a limit to the repair.
If this limit is exceeded, aqueous humor will be taken into the stroma of the cornea in a disorderly manner, causing edema and impairing the maintenance of corneal transparency. Therefore, during intraocular surgical operations, it is necessary to maintain the anterior chamber space so that other tissues and surgical instruments do not come into contact with the corneal endothelium, and to do so, the aqueous humor must be prevented from flowing out. No.

[Problem that the invention attempts to solve]

Therefore, in the past, the incision was temporarily sutured to prevent the outflow of aqueous humor, and then surgical instruments were inserted through the small gaps in the temporary sutures to perform the surgical procedure. After the surgical procedure was completed, the temporary sutures were released and the actual sutures were performed again. This resulted in problems such as complicated surgical procedures, increased surgical time and increased surgical invasiveness.

The present invention was developed to eliminate the above-mentioned problems with conventional intraocular surgical operations, and its purpose is to enable surgical operations without temporary suturing of the incision to maintain the anterior chamber space. The aim is to provide a bandage that will

[Means for solving problems]

To achieve this purpose, the bandage for maintaining anterior chamber space of the present invention has one main surface with a concave shape so as to cover the incision during intraocular surgery and to fit tightly around the incision. It is characterized in that it is made of a soft material with the other main surface having a convex shape and a curved cross-sectional shape, has a through hole for inserting an intraocular surgical instrument, and is transparent.

[Effect]

The bandage for maintaining the anterior chamber space of the present invention covers the incision wound to prevent the outflow of aqueous humor, and since surgical instruments can be inserted into the eye through the through hole, the anterior chamber space can be maintained without temporary sutures. Space can be maintained and surgical operations can be performed.

〔Example〕

Next, embodiments of the present invention will be described in detail with reference to the drawings.

The shape of the anterior chamber space maintaining bandage 1 according to the embodiment shown in FIGS. 1a and 1b has a circular or elliptical outline. One main surface is concave, the other main surface is convex, and the cross-sectional shape is curved so as to cover the incision during intraocular surgery and come into close contact with the incision and its surroundings. Small circular through holes 2 are formed at appropriate positions within the bandage 1 for inserting surgical instruments such as forceps, hooks, forceps, scalpels, and irrigators. bandage 1
The material is transparent so that intraocular surgical operations can be observed, and has elasticity so that it adheres closely to the cornea, sclera, conjunctiva, etc. In addition, materials that are soft (soft materials) have properties that do not adversely affect contact areas such as the cornea, sclera, and conjunctiva, and the aqueous humor, and do not damage contact areas such as the cornea, sclera, and conjunctiva.
is preferred. Therefore, specific materials for the bandage 1 include a hydrous material made of a homopolymer or copolymer of hydroxyethyl methacrylate;
Water-containing materials made of copolymers of vinyl pyrrolidone and other monomers, hydrophilic polyvinyl alcohol polymers, soft silicone rubber, butyl rubber, and the like are suitable. The dimensions of bandage 1 are, for example, the diameter.
10-20mm, especially about 16mm, with a thickness of 0.2-0.5mm,
In particular, it is about 0.4mm.

2a, 2b and 2c show modifications of the through hole 2 of the bandage 1. In this case, the entire shape of the bandage 1 is shown as a circle. Second
The through hole 2a in Figure a is formed in a linear shape. This line may be curved or straight. Through hole 2 in Figure 2b
b is rectangular, and the through hole 2c in FIG. 2c is triangular. Note that this through hole is determined depending on the surgical instrument to be inserted, and may have a shape and size other than those described above.

Figures 3a, 3b, and 3c show modifications of the overall shape of the bandage 1. In this case, all the through holes 2 are shown as small circles. In the bandage 1a of FIG. 3a, there is a circular or oval cutout 3a.
is provided. The bandage 1b shown in FIG. 3b is provided with a sector-shaped cutout 3b, and the bandage 1c shown in FIG. 3c is provided with a notch 3c shaped like a trapezoid. These notches 3a, 3b, 3c
has the effect of removing bubbles that have gotten between the cornea and the bandage, and the effect of supplying oxygen to the cornea. The foam gets between the cornea and the bandage when operating surgical instruments, making it difficult to see inside the eye. Note that the cutouts 3a, 3b, and 3c may also have shapes and dimensions other than those described above.

Next, an example in which the anterior chamber space maintenance bandage 1 shown in FIG. 1 is used in an intraocular lens implantation surgery will be described. In this surgery, first, as shown in FIG. 4, an incision 7 is formed in the limbus 6 between the cornea 4 and the sclera 5. Next, a lens nucleus (not shown) (about 10 mm in diameter) is delivered outside the eye through this incision 7. In this case, the length of the incision 7 is, for example, approximately
It is 12-18mm. Instead of temporarily suturing the incision 7 as in the conventional method, the bandage 1 for maintaining the anterior chamber space of the present invention is worn instead (see FIGS. 5 and 6). At this time, since the bandage 1 is attached to cover the incision 7, outflow of aqueous humor in the anterior chamber 8 is prevented, and the shape of the anterior chamber space is maintained.
Next, the irrigator 9 is inserted through the through hole 2 and suctions the cortex and the like remaining in the lens capsule within the anterior chamber 8 of the eye.
During this surgical operation, the shape of the anterior chamber space is maintained as described above, so that the irrigator 9
Since the corneal endothelium 4a does not come into contact with other tissues, the corneal endothelium 4a is not destroyed or damaged. Furthermore, since the bandage 1 is transparent, it is easy to observe the surgical operation inside the eye. After aspirating the residual cortex, bandage 1 is removed and an intraocular lens (about 6 mm in diameter) is inserted. Next, the bandage 1 is attached again, and the intraocular lens positioning instrument 9 is inserted through the through hole 2 to fix the intraocular lens in a predetermined position.Then, the bandage 1 is removed, the incision 7 is sutured, and the surgery begins. ends. Note that during the surgical operation, the bandage 1 can be replaced with one having a through hole that fits other surgical instruments 9.

[Effect of idea]

As mentioned above, the bandage for maintaining the anterior chamber space of the present invention covers the incision wound to prevent the outflow of aqueous humor, and allows surgical instruments to be inserted into the eye through the through hole, thereby maintaining the anterior chamber space. Surgical operations can be performed while maintaining the Therefore, there is no need to temporarily suture the incision or remove the sutures, which was conventionally done.
The surgical operation is simple and the surgical time is short. Furthermore, since the bandage is transparent, it is easy to observe the surgical operation within the eye.

[Brief explanation of drawings]

FIG. 1a is a front view of a bandage for maintaining anterior chamber space according to an embodiment of the present invention, FIG. 1b is a sectional view taken along the - line of the bandage for maintaining anterior chamber space shown in FIG. 1a, and FIG. 2a is , Figures 2b and 2c
The figure shows a modification of the through hole of the bandage.
Figures a, 3b, and 3c are views showing modified examples of the overall shape of the bandage; Figure 4 is a front view of the cornea, sclera, and limbus, showing the position of the incision during intraocular surgery; Fig. 5 is a front view of the eye with the bandage according to the present invention attached, and Fig. 6 is the − of Fig. 5.
FIG. 3 is a horizontal cross-sectional view of the bandage and eye along a line. 1, 1a, 1b, 1c...Bandage for maintaining anterior chamber space, 2, 2a, 2b, 2c...Through hole, 3
a, 3b, 3c...notch, 4...cornea, 4a...
... Corneal endothelium, 5 ... Sclera, 6 ... Limbus, 7 ... Incision wound, 8 ... Anterior chamber space, 9 ... Surgical instruments (irrigator, etc.).

Claims (1)

[Scope of claim for utility model registration] One main surface is concave, the other main surface is convex, and the cross-section A bandage for maintaining anterior chamber space, which is made of a soft material having a curved shape, has a through hole for inserting an intraocular surgical instrument, and is transparent.