JP3159239U - Marking device - Google Patents

Abstract

Provided is a marking device that minimizes the burden on a patient to which an intraocular lens is implanted and makes it easy to visually recognize an astigmatic axis marking from the outside. A marking device is a device in which a connecting portion of a main body cylinder 2 is attached to a holder tube of an applanation tonometer, and marking is performed from a front end surface of an angle setting portion 2b having a large diameter in the main body cylinder 2. A pair of marker plates 6 to which ink is applied at the tip is provided so as to protrude, and the interval AA between the outer ends of both marker plates 6 is also marked on the conjunctival site outside the cornea. The distance BB between the inner end portions of the marker plate portions 6 can be absorbed enough to absorb the variation in the size of the cornea due to individual differences between patients, and the marking is reliably performed on the portion including the conjunctiva. Yes. [Selection] Figure 4

Description

  The present invention relates to a marking device for marking an eyeball surface, which is used for aligning an intraocular lens with an astigmatism axis in a method of performing cataract surgery simultaneously with correction of astigmatism.

  The treatment of cataract is to replace the cloudy lens with an intraocular lens that is an artificial lens. The surgical procedure is to open the eyeball and remove the anterior capsule of the lens, and then the nucleus and cortex of the lens And are removed by suction, and an intraocular lens is inserted and fixed to a posterior capsule or the like left in the eyeball. Here, as an intraocular lens to be implanted and inserted into the eyeball, a single focus lens for treating cataract has been used conventionally, but in recent years, an eye having a function of correcting hyperopia and myopia. Inner lenses have been developed and put to practical use. Furthermore, as disclosed in Patent Document 1, for example, an intraocular lens having a function of correcting astigmatism has been developed.

JP 2007-21209 A

  By the way, in order to correct astigmatism, an astigmatism correcting lens is used. However, when the astigmatism correcting lens is implanted in the eye, the angle of the astigmatism axis and the angle of the lens must be matched. For this purpose, an astigmatic axis is detected in advance by inspection, and when the intraocular lens is mounted, the axis of the intraocular lens is aligned with the astigmatic axis. In order to perform this alignment, a reference axis that is an axis of 0 to 180 degrees is detected in advance to perform marking, and the intraocular lens axis is aligned with the astigmatic axis immediately before performing the surgical procedure. It will be.

  In aligning the intraocular lens to the tilt of the astigmatism axis, the reference axis is detected before the operation. At this time, the patient is in the sitting position and the reference axis of 0 to 180 degrees is detected. At the stage of performing the surgical procedure, the patient is placed in the supine position, and the astigmatism axis is marked again on the eyeball using the already performed reference axis marking as a clue. It is common. However, performing the alignment of the intraocular lens in two stages and marking twice will place a heavy burden on the patient.

  The present invention has been made in view of the above points. The purpose of the present invention is to minimize the burden on the patient into which the intraocular lens is implanted and to make the astigmatic axis marking visible from the outside. It is to be able to form.

  In order to achieve the above-described object, the present invention is a marking device that is attached to a holder tube having an insertion hole at the tip of a shaft body standing on a device body, and is used for mounting an intraocular lens. A connecting portion that is detachably inserted into the insertion hole and is rotatable about an axis with respect to the holder tube, and an angle measuring portion having a larger diameter than the connecting portion and provided with an angle display portion on an outer peripheral surface; A main body cylinder having a through hole for a finder, and a marking line having a predetermined length on the surface of the eyeball, projecting from the front end surface of the angle measuring section of the main body cylinder and having a positional relationship of 180 degrees with each other And a pair of marker plate portions, and the interval between the outer end portions of the marker plate portions is wider than the diameter of the cornea of the eyeball on which the marking line is formed. To do.

  When the intraocular lens is implanted in the eyeball, the cornea has a lightness close to black or black, and a treatment such as incision of the cornea is performed. Various instruments, chemicals, and the like come into contact with the cornea region. On the other hand, since the conjunctiva has a white color or a color close to white, at least a part of the marking extends beyond the cornea to reach the conjunctival region. Thereby, the visibility of marking becomes high. In addition, since the conjunctiva is not subjected to any special treatment, the sharpness of the marking can be maintained from the cornea. Therefore, the marking is set so that at least a part is formed in the region of the conjunctiva.

  The marking device needs to set a reference axis of 0 to 180 degrees, but it is not always necessary to mark and display this reference axis. Therefore, the reference axis can be set even when the marking device is not in contact with the eyeball. Since the astigmatic axis is an axis inclined relative to the reference axis, when the marking device is rotated around the axis with respect to the holder axis and the angle of the marker plate portion of the marking device coincides with the astigmatic axis, A marking line can be formed by pressing the tip of the marker plate portion against the eyeball. As a result, the time for marking is shortened, and the marking can be performed only once, so that the burden on the patient can be reduced.

  The main body cylinder of the marking device has a stepped cylindrical shape, and a through hole for a finder having a predetermined inner diameter is formed on the center axis. This through-hole is smaller than the diameter of the cornea, and the outer diameter of the angle measuring portion of the stepped cylindrical main body cylinder is larger than the diameter of the cornea. Here, marking lines corresponding to the width dimension of the marker plate portions provided at two places are formed, but the outer end portions of both marker plate portions in the angle measuring portion are arranged at the outermost peripheral position of the angle measuring portion. Is desirable. On the other hand, the inner ends of both marker plates can be extended to the position of the inner diameter part of the angle measuring part, but in short, it is only required to be marked at the position of the conjunctiva. If the inner end portion is positioned on, the original function is exhibited only by forming a marking line having a minimum length.

  The burden on the patient when implanting an intraocular lens having an astigmatism correction function together with the treatment of cataract can be minimized, and the astigmatic axis marking can be easily seen from the outside.

BRIEF DESCRIPTION OF THE DRAWINGS It is a whole block diagram which shows the state which mounted | wore the applanation tonometer with the marking apparatus which shows one Embodiment in this invention. It is sectional drawing of the state which connected the marking apparatus of FIG. 1 to the holder cylinder. It is an external appearance perspective view of the marking apparatus of FIG. It is a right view of the marking device of FIG.

    Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, as shown in FIG. 1, the marking device 1 is incorporated as an accessory of a slit lamp device, for example, and is attached to an applanation tonometer 10 used for measuring intraocular pressure or the like. It is composed. However, the marking device 1 may be configured to be attached to a device other than the applanation tonometer 10.

  The applanation tonometer 10 is composed of a main body housing 11 with an attachment shaft 12 erected, and a holder tube 13 is provided at the tip of the attachment shaft 12. The holder tube 13 is formed with an insertion hole 14 for mounting equipment, and the marking device 1 is mounted in the insertion hole 14 of the holder tube 13 of the applanation tonometer 10. The marking device 1 is configured as shown in FIGS. 2 and 3. As is clear from these drawings, the marking device 1 has a main body cylinder 2. The main body cylinder 2 is provided with a through hole 3 having a predetermined hole diameter at the axial center position, and the through hole 3 functions as a finder.

  The outer surface of the main body cylinder 2 of the marking device 1 has a stepped cylindrical shape, the small diameter portion is a connecting portion 2a inserted into the insertion hole 14 of the holder tube 13, and the large diameter portion is an angle setting portion 2b. A reference axis index 15 is provided on the outer peripheral surface of the holder cylinder 13 at positions of 0 degrees and 180 degrees. On the other hand, a scale 4 for displaying the angle is provided on the outer peripheral surface of the angle setting unit 2b of the marking device 1, and the holder cylinder 13 is inserted and removed at a position on the tip side from the scale 4. A plurality of protrusions 5 functioning as slip stoppers when rotating in the inserted state are formed.

  A marker plate portion 6 projects from the end face of the angle setting portion 2 b of the main body cylinder 2. The marker plate portion 6 is a thin plate-like member, and a pair is provided so as to have an angular relationship of 180 degrees. Marking ink made of biocompatible paint is applied to the tip of the marker plate portion 6, and marking is formed on the eyeball surface by pressing the marker plate portion 6 against the eyeball.

  The marker plate portion 6 is used to contact the eyeball surface from the outside with the eyelids open, and at least a part of the marker plate portion 6 is in contact with the conjunctival region. Here, in a general eyeball, the diameter of the cornea does not exceed 10 mm, although there are some individual differences. Therefore, as shown in FIG. 4, in consideration of individual differences between patients, the interval AA between the outer ends of both marker plates 6 is 12 mm or more, and the conjunctival region outside the cornea. Also be sure to be marked. However, when performing marking, it is necessary to prevent the marker plate portion 6 from interfering with the wrinkles. Therefore, there is a limit in increasing the interval AA between the outer end portions of the marker plate portion 6. Specifically, it is about 12 to 13 mm. Since the marker plate portion 6 is erected on the end face of the angle setting portion 2b, the outer diameter of the angle setting portion 2b is at least equal to or more than the interval AA between the outer end portions of the marker plate portion 6. It must be bigger. Therefore, it is desirable to make the outer diameter of the angle setting portion 2b substantially coincide with this interval AA.

  On the other hand, since the angle setting portion 2 b is provided with the through hole 3, the interval BB between the inner end portions of the marker plate portions 6 is equal to or larger than the hole diameter of the through hole 3. It is essential to mark the eyeball on the conjunctival area, and it is not necessary to mark the cornea area. Rather, in order to reduce the amount of marking ink attached to the eyeball, It is desirable that the plate part 6 does not contact. However, in order to sufficiently absorb the variation in the size of the cornea due to individual differences, the inner end portion of the marker plate portion 6 is positioned slightly within the cornea. Accordingly, the pair of marker plate portions 6 has a width from the outer peripheral surface of the angle setting portion 2b to a predetermined position on the outer peripheral side from the formation portion of the through hole 3. As a result, the inside of the cornea may be marked to some extent regardless of individual differences among patients, but the region of the conjunctiva is reliably marked. In the eyeball, the marked portion has an approximately arc shape, and therefore the tip of the marker plate portion 6 has a curved shape close to the arc of the eyeball.

  The marking device 1 is incorporated so that the connecting portion 2 a of the main body cylinder 2 is inserted into the insertion hole 14 in the holder cylinder 13 of the applanation tonometer 10. Then, the operator visually recognizes the patient's eyeball in the sitting position through the through hole 3 functioning as a finder, detects the position of the reference axis of 0 to 180 degrees in the cornea or the lens of the eyeball, The reference axis index 15 of the holder cylinder 13 is matched with the measured reference axis. Then, the main body cylinder 2 of the marking device 1 is rotated with respect to the holder cylinder 13 so that the marker plate portion 6 is aligned with the reference axis. In the above operation, the marker plate portion 6 is brought close to the patient's eyeball, but the operation can be performed in a non-contact state.

  The astigmatism axis is an inclination with respect to the reference axis, and the inclination of the astigmatism axis is measured in advance before the surgical procedure. Therefore, the marking device 1 with respect to the holder cylinder 13 is rotated by the inclination angle of the astigmatic axis from the reference axis, and the angular position corresponding to the inclination angle of the scale 4 provided on the outer peripheral surface of the angle setting portion 2b in the main body cylinder 2. Is aligned with the reference axis index 15 of the holder cylinder 13. And marking ink is apply | coated to the front-end | tip part of the marker board part 6 by the time of adjustment of the angle of the marking apparatus 1 beforehand or at the latest. Then, the astigmatism axis is marked on the eyeball by bringing the marker plate portion 6 into contact with the eyeball and applying a predetermined pressure.

  Here, at least a part of the astigmatic axis marking is located on the conjunctiva. Moreover, while the surgical procedure for removing the lens is being performed for the treatment of cataract, the treatment tool and the drug solution come into contact with the cornea, but do not substantially come into contact with the conjunctival site. Therefore, the visibility from the outside of the marking is improved, and the visibility of the marking is not lost or lowered until the lens is removed and the intraocular lens is implanted during the operation. Therefore, it can be accurately mounted in a state where the direction of the intraocular lens is rotated along the marking.

DESCRIPTION OF SYMBOLS 1 Marking apparatus 2 Main body cylinder 2a Connection part 2b Angle setting part 3 Through-hole 4 Scale 5 Projection 6 Marker board part 10 Applanation tonometer 13 Holder cylinder 14 Insertion hole 15 Reference | standard axis | shaft parameter | index

Claims (2)

In a marking device that is attached to a holder cylinder having an insertion hole at the tip of a shaft body erected on the apparatus main body and used for mounting an intraocular lens,
A connecting portion that is removably inserted into the insertion hole and is rotatable about an axis with respect to the holder tube, and an angle measuring portion that is larger in diameter than the connecting portion and provided with an angle display portion on the outer peripheral surface. A body cylinder having through holes for the finder,
A pair of marker plates that protrude from the distal end surface of the angle measuring portion of the main body cylinder, have a positional relationship of 180 degrees with each other, and form a marking line of a predetermined length on the eyeball surface;
A marking device characterized in that the interval between the outer end portions of the marker plate portions is wider than the diameter of the cornea of the eyeball on which the marking line is formed. The angle measuring part constituting the main body cylinder has an outer diameter of the through-hole larger than a diameter of the cornea, an inner diameter not smaller than a diameter of the cornea, and the marker plate part from the outer diameter part of the angle measuring part. 2. The marking device according to claim 1, wherein the marking device has a width dimension from an inner diameter portion to an outer position.

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