JP2007181492A - Cornea protection cover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cornea protection cover capable of sufficiently protecting a cornea from a disinfectant in disinfecting the surface of an eyeball for a surgery, diagnosis or examination, etc. <P>SOLUTION: The cornea protection cover 10 is composed of a container body whose lower bottom is open. The cornea protection cover can cover the surface of the cornea 1 on the surface of the eyeball. The container body is elastically deformable, and the space 13 between the inner surface of the container body and the surface of the cornea 1 is in the negative-pressure state when disposed on the surface of the eyeball. Accordingly, the container body can be fixed on the surface of the eyeball with the suction power generated between the inner surface of the container body and the surface of the cornea. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cornea protective cover. More particularly, the present invention relates to a cornea protective cover that can sufficiently protect the cornea from a disinfectant during the disinfection of the eyeball surface during surgery, diagnosis, examination, and the like.

  Conventionally, in the case of surgery on the eyeball surface, in order to prevent post-operative endophthalmitis caused by bacteria present on the eyeball surface etc., disinfection of the eyeball surface using a disinfectant such as an iodine agent before the operation Has been done. The above bacteria are present more on the conjunctiva 2, 5, and 7 shown in FIG. 1, particularly on the edge of the conjunctival lid 3 and the like than the central part of the cornea etc. on the surface of the eyeball. Disinfection with a disinfectant is performed. Such disinfection is usually performed by flowing or immersing a disinfectant diluted to a predetermined concentration directly on the eyeball surface for about 30 to 90 seconds.

However, when the iodine agent, which is a disinfectant, contacts the corneal surface for a long time, it causes a considerable burden on the corneal epithelium, causing epithelial disorders such as punctate superficial keratosis and corneal erosion. Sometimes.
Therefore, there is a need for a method for reducing the burden of disinfection on the cornea, which is an important part that controls vision.

In addition, as an invention aimed at protecting the surface of the eyeball, for example, a protector for protecting the eyeball from a sharp instrument when operating the periphery of the orbit is known (see Patent Document 1). In addition, a jig that covers the cornea for cataract surgery is known (see Patent Document 2).
However, the protector of Patent Document 1 covers the entire surface of the eyeball including the cornea, and the jig of Patent Document 2 prevents strong light from hitting the fundus. It is not a jig for protecting the cornea from the disinfectant during disinfection.

Japanese Patent Laid-Open No. 2005-230312 JP 2003-24366 A

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cornea protective cover that can sufficiently protect the cornea from a disinfectant at the time of disinfection of the eyeball surface in surgery, diagnosis, inspection, and the like. And

The present invention is as follows.
(1) A corneal protective cover comprising a container body having an open bottom portion and capable of covering the corneal surface on the eyeball surface, the container body being elastically deformable and disposed on the eyeball surface When this is done, the space between the inner surface of the container body and the surface of the cornea can be brought into a negative pressure state so that it can be fixed on the surface of the eyeball by the suction force generated between the inner surface of the container body and the surface of the cornea A corneal protective cover characterized by being.
(2) The cornea protective cover according to (1) above, wherein an inner diameter of the bottom surface of the bottom of the container body is 10 to 15 mm.
(3) The corneal protective cover according to (1) or (2), wherein the container body has a bowl shape, a hemispherical shape, a dish shape, a cylindrical shape having a top surface portion, or a conical shape.
(4) The container body is made of an elastically deformable container having an open bottom, and the container body has a bowl shape, a hemispherical shape, a dish shape, a cylindrical shape having a top surface portion, or a conical shape, and the container. A cornea protective cover, wherein an inner diameter of the bottom bottom surface of the body is 10 to 15 mm.
(5) The cornea protective cover according to any one of (1) to (4), wherein the material constituting the container body is rubber or thermoplastic elastomer.
(6) The cornea protective cover according to any one of (1) to (5), wherein negative pressure forming means is formed on the surface of the container body.
(7) The cornea protective cover according to any one of (1) to (6), wherein negative pressure releasing means is formed on the surface of the container body.
(8) The cornea protective cover according to any one of (1) to (7), which is used when disinfecting the surface of the eyeball.

According to the cornea protective cover of the present invention, when disinfecting the eyeball surface during surgery, diagnosis, examination, etc., the burden on the cornea due to the disinfectant such as an iodine agent can be reduced.
Further, when the negative pressure forming means is formed on the surface of the container body constituting the cornea protective cover, the cornea protective cover can be easily mounted on the eyeball surface without imposing a burden on the cornea.
Furthermore, when the negative pressure release means is formed on the surface of the container body constituting the cornea protective cover, the cornea protective cover can be easily removed from the eyeball surface without imposing a burden on the cornea.

Hereinafter, the present invention will be described in detail.
The cornea protective cover is a cornea protective cover that is formed of a container body that is open at the bottom and covers the corneal surface on the eyeball surface, the container body being elastically deformable, and the eyeball surface By placing the space between the inner surface of the container body and the corneal surface in a negative pressure state when placed on the surface of the eyeball by the suction force generated between the inner surface of the container body and the corneal surface. It can be fixed to.

The shape of the “container body” is such that the bottom lower part is opened, and it can cover the corneal surface when placed on the eyeball surface. Examples include a dish shape, a cylindrical shape having a top surface portion, and a conical shape (see FIGS. 3 to 7).
Moreover, the inner diameter of the bottom surface of the bottom of the container body can be appropriately adjusted with respect to the diameter of the cornea, and is usually 10 to 15 mm.
Furthermore, as a material which comprises the said container body, what has corrosion resistance with respect to common disinfectants, such as an iodine agent, is used, For example, rubber | gum, a thermoplastic elastomer, etc. are mentioned.

Further, negative pressure forming means can be formed on the surface of the container body. According to this negative pressure forming means, when the cornea protective cover is disposed on the surface of the eyeball, the space between the inner surface of the container body and the corneal surface is easily brought into a negative pressure state, and the inner surface of the container body and the above described A suction force is generated between the corneal surface and the corneal surface, and the corneal surface can be fixed without adversely affecting the cornea.
The configuration of the negative pressure forming means is not particularly limited as long as the negative pressure state can be obtained. For example, (1) a hollow elastically deformable protrusion that can change the volume of the container body by pressing, (2) a pressing section that can easily elastically deform the container body by pressing, ( 3) A thin-walled portion or the like in which a part of the container body is formed thinly so that it can be easily elastically deformed. These means can be used in combination. In particular, when the hollow elastically deformable protrusion is provided, it can be easily fixed on the eyeball surface by placing the protrusion on the eyeball surface in a pressed state and releasing the pressure.
Moreover, the formation location of the said negative pressure formation means is not specifically limited, It may be formed in only one location on the surface of a container body, and may be formed in multiple locations. Further, the negative pressure forming means may be integrally formed with the container body or may be formed later on the surface of the container body.

Moreover, a negative pressure releasing means can be formed on the surface of the container body. According to this negative pressure release means, the cornea protective cover fixed in a negative pressure state on the eyeball surface can be easily removed without imposing a burden on the cornea.
The configuration of the negative pressure releasing means is not particularly limited as long as the negative pressure state can be released. For example, (1) a valve function capable of supplying air into the container body in a negative pressure state by pressing, (2) a pressing portion that can easily elastically deform the container body by pressing, (3) easy For example, a thin portion in which a part of the container body is formed in a thin shape so as to be elastically deformable. These means can be used in combination.
Moreover, the formation location of the said negative pressure cancellation | release means is not specifically limited, You may form in only one location of the surface of a container body, and may be formed in multiple locations. Further, the negative pressure releasing means may be integrally formed with the container body or may be formed later on the surface of the container body.

  The corneal protective cover of the present invention is composed of the elastically deformable container body whose bottom is opened, and the container body has a bowl shape, a hemispherical shape, a dish shape, a cylindrical shape having a top surface portion, or a conical shape. It is preferable that the inner diameter of the bottom surface of the bottom of the container body is 10 to 15 mm.

  As shown in FIG. 1, the cornea protective cover of the present invention is usually disposed on the eyeball conjunctiva 5 on the surface of the eyeball, specifically along the cornea ring portion 1 a that is the boundary between the cornea 1 and the eyeball conjunctiva 5. The space 13 between the inner surface of the container body constituting the cornea protective cover and the corneal surface is in a negative pressure state, so that the suction force generated between the inner surface of the container body and the corneal surface causes the surface of the eyeball conjunctiva 5 on the eyeball surface. Fixed to.

The cornea protective cover of the present invention is preferably used because it can reduce the burden on the cornea due to the disinfectant such as an iodine agent when disinfecting the eyeball surface at the time of disinfection of the eyeball surface in surgery, diagnosis, inspection, etc. It is done.
The disinfection method when using this cornea protective cover is not particularly limited.For example, since the number of bacteria on the cornea surface is much smaller than the edge of the conjunctiva, after washing the cornea surface with physiological saline or the like, By wearing this cornea protective cover, the surface of the eyeball other than the cornea can be sufficiently disinfected. Further, after flowing a disinfectant having a liquid amount that does not impose a burden on the corneal surface, it is possible to disinfect other eyeball surfaces by attaching the cornea protective cover.

  Hereinafter, the cornea protective cover of the present invention will be described specifically by way of examples. In addition, the cornea protective cover of this invention is not restrict | limited to an Example and the figure to refer.

Example 1 (see FIG. 2)
(1) Structure of cornea protective cover The cornea protective cover 10 of Example 1 is comprised by the container body of the bowl shape, and is formed with rubber | gum or a thermoplastic elastomer.
The cornea protective cover 10 has a bottom portion 11 held on the surface of the eyeball, and a pressing portion 12 is formed at the upper center.
The bottom part 11 has the lower surface 11a which contacts the eyeball surface, and the inner diameter of the lower surface 11a of the bottom part is 10 to 15 mm. This inner diameter is selected to have an appropriate size that matches the corneal diameter of each person.
The pressing portion 12 is for facilitating attachment / detachment of the cornea protective cover 10 to the eyeball surface, and is integrally formed with the cornea protective cover. By pressing the pressing portion 12, air is discharged or supplied in the space 13, and the cornea protective cover 10 can be attached to and detached from the eyeball surface.

(2) Method of attaching / detaching the cornea protective cover The method of attaching / detaching the cornea protective cover 10 will be described in detail.
As shown to Fig.3 (a), it arrange | positions so that the lower surface 11a of the cornea protective cover 10 may contact eyeball conjunctiva along the corneal ring part 1a.
Next, as shown in FIG. 3B, the pressing portion 12 is pushed into the eyeball surface side with a finger or the like. If it does so, the center part will be dented by the elasticity of the cornea protective cover 10, and the air in the space 13 will be extruded from the clearance gap between the cornea ring | wheel part 1a and the lower surface 11a.
After that, when the pressed finger or the like is released from the pressing portion 12, the corneal protective cover 10 that is an elastic body tries to return to the original shape by the restoring force, but negative pressure is generated in the space 13, and the lower surface 11a becomes cornea. It will be in the state attracted | sucked along the ring part 1a [refer FIG.3 (c)].

  As shown in FIG. 1, after the corneal protective cover 10 is attached, an iodine agent is poured into the disinfecting portion. By doing so, the eyelid conjunctiva 2 covering the back of the eyelid 4, the eyeball conjunctiva 5 covering the sclera 6, and both of which are covered with a lot of bacteria while preventing the iodine agent from being applied to the cornea 1 It becomes possible to disinfect the surface of the conjunctiva portion 7 to be connected. In particular, the conjunctival lid 3 contains a lot of bacteria and needs to be sterilized carefully. Even in such a case of careful sterilization, the cornea protective cover 10 is firmly adsorbed and fixed, so that the cornea 1 is protected from the iodine agent during the sterilization without being displaced or detached. Become.

  When removing the cornea protective cover 10, a gap is generated by pressing the pressing portion 12 as shown in FIG. 3B from the attached state of the cornea protective cover 10 shown in FIG. Since air enters from the inside and the negative pressure decreases, it can be removed by being pinched with tweezers or the like.

  As described above, the edges of the corneal cap 3 shown in FIG. 1 can be sufficiently disinfected without imposing a burden on the surface of the cornea 1. Accordingly, it is possible to perform a refractive power correction operation or the like while suppressing the possibility of postoperative endophthalmitis extremely low and without placing a burden on the cornea.

Example 2 (see FIG. 4)
The cornea protective cover 20 according to another embodiment of the second embodiment is formed of a hemispherical container body, and is formed of rubber or a thermoplastic elastomer. The cornea protective cover 20 has a bottom portion 21 held on the surface of the eyeball, and a pressing portion 22 is formed at the upper center. The bottom 21 has a lower surface 21a that contacts the surface of the eyeball.
Since the cornea protective cover 20 has a hemispherical shape, there is an advantage that a space generated by the eyeball surface and the cornea protective cover 20 becomes larger when mounted on the eyeball surface. In that case, since a larger negative pressure can be generated by pressing the pressing portion 22, the state of the eyeball surface in contact with the lower surface 21 a is difficult to adsorb the corneal protective cover due to the amount of tears or the like. Even so, it is easy to install. Moreover, since the distance from the pressing part 22 to the corneal surface is long, even if the pressing part 22 is fully pressed, the inner surface of the corneal protective cover 20 is difficult to contact the corneal surface, and safety is high.
In addition, about the usage method of the cornea protective cover 20, and another effect, it is the same as that of the cornea protective cover 10, Therefore The description is abbreviate | omitted.

Example 3 (see FIG. 5)
The cornea protective cover 30 according to another aspect of the third embodiment is configured by a dish-shaped container body, and is formed of rubber or a thermoplastic elastomer. The cornea protective cover 30 has a bottom portion 31 held on the surface of the eyeball, and a pressing portion 32 is formed at the upper center. The bottom 31 has a lower surface 31a that contacts the surface of the eyeball.
Since the cornea protective cover 30 is dish-shaped, when it is mounted on the eyeball surface, the degree of protrusion of the cornea protective cover 30 from the eyeball surface is extremely low. Therefore, when the corneal protective cover 30 is attached and the surface of the eyeball other than the cornea is sterilized with a disinfectant such as an iodine agent, the corneal protective cover 30 is unlikely to obstruct work, and can be disinfected efficiently.
In addition, about the usage method of the cornea protective cover 30, and another effect, since it is the same as that of the cornea protective cover 10, the description is abbreviate | omitted.

Example 4 (see FIG. 6)
The cornea protective cover 40 according to another aspect of the fourth embodiment is formed of a hemispherical container body, and is formed of rubber or a thermoplastic elastomer. The cornea protective cover 40 has a bottom portion 41 held on the surface of the eyeball, and a pressing portion 42 is formed at the upper center. The bottom 41 has a lower surface 41a that contacts the surface of the eyeball.
Since the cornea protective cover 40 has a cylindrical shape with a top surface portion, a location 43 where the top surface portion and the cylinder portion intersect is substantially perpendicular. Therefore, when the attached corneal protective cover 40 is removed, this portion 43 can be easily picked with tweezers or the like, and air can be easily taken in from the gap between the lower surface 41a and the corneal ring portion 1a to reduce the negative pressure.
In addition, about the usage method of the cornea protective cover 40, and another effect, since it is the same as that of the cornea protective cover 10, the description is abbreviate | omitted.

Example 5 (see FIG. 7)
The cornea protective cover 50 according to another embodiment of the fifth embodiment is formed of a conical container body, and is formed of rubber or a thermoplastic elastomer. The cornea protective cover 50 has a bottom 51 that is held on the surface of the eyeball, and the bottom 51 has a lower surface 51a that contacts the surface of the eyeball. The cornea protective cover 50 has a conical shape, and the upper side serves as a negative pressure forming means similar to the pressing portion.
The cornea protective cover 50 can exhaust the air inside the container body by pinching the upper portion 52 that acts as a pressing portion, and can make the space with the cornea surface a negative pressure state. Similarly, since the negative pressure can be lowered by pinching the upper portion 52, the operation is simple.
In addition, since it is the same as that of the cornea protection cover 10 about the usage method of the cornea protection cover 50, and another effect, the description is abbreviate | omitted.

Example 6 (see FIG. 8)
(1) Structure of cornea protective cover The cornea protective cover 60 of the other aspect of Example 6 is comprised by the container body of the bowl-shaped shape, and is formed with rubber | gum or a thermoplastic elastomer. The cornea protective cover 60 has a bottom 61 that is held on the surface of the eyeball, and a hollow protrusion 62 that can be elastically deformed is formed at the center of the top.

(2) Method of attaching / detaching the cornea protective cover The method of attaching / detaching the cornea protective cover 60 will be described in detail.
As shown in FIG. 8A, while pressing the hollow protrusion 62, the lower surface 61a of the cornea protective cover 60 is disposed along the cornea ring portion 1a so as to contact the eyeball conjunctiva.
Next, as shown in FIG. 8B, the pressing of the hollow projection 62 is released. As a result, the hollow protrusion 62, which is an elastic body, tries to return to its original shape by the restoring force, and a negative pressure is generated in the space 13, and the lower surface 61a is adsorbed along the corneal ring portion 1a.

Further, when removing the cornea protective cover 60, a gap is created by pressing the hollow protrusion 62 from the attached state of the cornea protective cover 60 shown in FIG. 8B, and air enters the space 13 from the outside. Since the negative pressure decreases, it can be removed by being pinched with tweezers or the like.
In addition, since the other effect of the cornea protective cover 60 is the same as that of the cornea protective cover 10, the description is abbreviate | omitted.

It is a schematic cross section for demonstrating the state equipped with this cornea protective cover. It is a schematic diagram for demonstrating the mounting method of this cornea protective cover. It is a model perspective view for demonstrating the structure of this cornea protective cover. It is a model perspective view for demonstrating the structure of the cornea protective cover of another aspect. It is a model perspective view for demonstrating the structure of the cornea protective cover of another aspect. It is a model perspective view for demonstrating the structure of the cornea protective cover of another aspect. It is a model perspective view for demonstrating the structure of the cornea protective cover of another aspect. It is a schematic diagram for demonstrating the mounting method of the cornea protective cover of another aspect.

Explanation of symbols

  1; cornea 10, 20, 30, 40, 50, 60; cornea protective cover, 11, 21, 31, 41, 51, 61; bottom, 12, 22, 32, 42; pressing part, 11a, 21a, 31a 41a, 51a, 61a; lower surface, 13; space, 62; hollow protrusion.

Claims (8)

A corneal protective cover comprising a container body having an open bottom and covering the corneal surface on the eyeball surface,
The container body is elastically deformable, and when placed on the surface of the eyeball, the space between the container body inner surface and the corneal surface is brought into a negative pressure state, whereby the container body inner surface and the cornea A cornea protective cover, which can be fixed on the surface of the eyeball by a suction force generated between the surface and the surface.   The cornea protective cover according to claim 1, wherein an inner diameter of the bottom surface of the bottom of the container body is 10 to 15 mm.   The corneal protective cover according to claim 1 or 2, wherein the container body has a bowl shape, a hemispherical shape, a dish shape, a cylindrical shape having a top surface portion, or a conical shape.   The container body is formed of an elastically deformable container body whose bottom is opened, and the container body has a bowl shape, a hemispherical shape, a dish shape, a cylindrical shape having a top surface portion, or a conical shape, and a bottom portion of the container body A corneal protective cover, wherein the inner diameter of the lower surface is 10 to 15 mm.   The cornea protective cover according to any one of claims 1 to 4, wherein the material constituting the container body is rubber or a thermoplastic elastomer.   The cornea protective cover according to any one of claims 1 to 5, wherein a negative pressure forming means is formed on a surface of the container body.   The cornea protective cover according to any one of claims 1 to 6, wherein a negative pressure releasing means is formed on a surface of the container body.   The cornea protective cover according to any one of claims 1 to 7, which is used when disinfecting an eyeball surface.

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