CN213489344U - Multi-functional locator is used in ophthalmic surgery - Google Patents

Abstract

The utility model provides a multi-functional locator is used in ophthalmic surgery belongs to the medical supplies field. The multi-functional locator is used in operation includes: a positioning ring and a positioning rod; the positioning ring comprises two coaxial rings which are connected into a whole, namely an inner ring and an outer ring positioned outside the inner ring; the upper surface of the inner ring is a concave upper annular arc surface, the upper edge of the upper annular arc surface is the excircle of the upper surface of the inner ring, and the lower edge of the upper annular arc surface is the inner circle of the inner ring; and two ends of the positioning rod are respectively connected with the inner circle of the inner ring and are positioned on one diameter of the inner circle. The utility model discloses can use in cornea transplantation operation, astigmatic intraocular lens implantation operation and cataract suspend intraocular lens operation in midair, have that the operation is simple and easy, the location is accurate, good reproducibility, shorten operation time, guarantee advantages such as patient postoperative obtains best visual effect.

Description

Multi-functional locator is used in ophthalmic surgery

Technical Field

The utility model belongs to the field of medical supplies, concretely relates to ophthalmic surgery uses multi-functional locator.

Background

As corneal transplantation is increasingly widespread, more and more patients benefit from it. Although the operation method is continuously updated, the involution of the implant bed in the operation is bad, and the operation effect is directly influenced. How to accurately mark the central vertex of the cornea and ensure that the implant bed is well jointed is the first problem to be solved in the corneal transplantation.

In the corneal transplantation operation, the positioning and involution of the corneal implant and the implant bed are crucial, and in the current operation, the operator determines the corneal vertex by making the patient look at a microscope light source or finding the pupil center, however, the pupil is usually blocked by the corneal center of the patient due to scar and turbidity, and the vision function is usually poor, so the vision fixation is poor. In such cases, the corneal central point is difficult to locate. During operation, a doctor needs to determine the central point of the implant bed for corneal transplantation, so that the condition that the postoperative visual quality of a patient is influenced by the position offset of the implant bed due to improper central point selection is avoided; current corneal central apex positioners consist of a cylindrical impression and a handle. It is determined by having the patient fixate on the optotype and then impressing the same with a positioner impression onto the central portion of the cornea to form a circular impression. The method is suitable for patients with certain visual function, the cornea of most patients undergoing corneal transplantation operation has turbidity of different degrees, which causes difficulty in watching visual targets, and the determined central vertex of the cornea can cause deviation under the condition, thereby causing the occurrence of complications such as poor alignment of the corneal graft bed of the patient, post-operation graft deviation, astigmatism and the like, and influencing the curative effect of the operation.

In addition, cataract is the first eye disease causing blindness in China, the cataract patients occupy 1/3 in the world at present, and 1 in almost 5 patients who receive cataract surgery is combined with astigmatism. Treating cataract while correcting astigmatism is a difficult point to solve this problem. The appearance of the toric intraocular lens capable of correcting the astigmatism of the cornea obviously improves the visual quality of cataract patients with combined astigmatism. However, deviations of the toric intraocular lens from the previously determined astigmatic axis will severely affect the postoperative vision performance. The axial position of the artificial lens deviates 0-30 degrees, has small influence on the astigmatism correction, and can be accepted by most patients clinically; the axial deviation of the artificial lens exceeds 30 degrees, and the original astigmatism can hardly be corrected; the axial deviation of the artificial lens exceeds 45 degrees, which can aggravate the original astigmatism of the patient and seriously affect the postoperative visual function recovery. It is therefore important to ensure that the toric intraocular lens is implanted at a predetermined axial position.

Before the astigmatic intraocular lens operation, a doctor needs to determine the correction axis of the astigmatic intraocular lens, however, during the change of the body from the upright position to the supine position, the human eye rotates, which causes the operation axis determined by the upright position to change in the supine position. In order to accurately mark the eye position in the operation, the horizontal slit light of the slit lamp is required to be used for marking the horizontal position of the corneal limbus before the operation, and even if a patient changes the body position in the operation, a doctor can still accurately mark the operation position through the marking points.

The existing astigmatic intraocular lens positioning marker is in a regular circular ring shape, and the upper surface of the marker is a polished plane and marked with circumferential scales. The V-shaped openings are arranged at the 0-degree and 180-degree positions and used as marking reference coordinates, and the polished upper surface in the operation generates strong light reflection under the strong illumination of a microscope, so that the normal operation of an operator is influenced. Moreover, the posterior surface of the device uses a sharp blade to cut the limbal epithelium at the desired location, with some trauma to the patient's cornea.

In general, in cataract surgery, after removal of the clouded lens, the physician will leave the clear capsular bag of the lens and implant the intraocular lens in the capsular bag with a centered and stable implant. However, in patients with missing or incomplete capsular bag due to trauma, congenital or other factors, where the intraocular lens cannot be implanted in the capsular bag, suture-suspension technique is used to suture the intraocular lens between the scleral layers corresponding to the ciliary sulcus at a distance of 2mm from the limbus, whereby intraoperative positioning of the scleral suture points is an important factor in ensuring that the intraocular lens is centered and the optic surface is not tilted. During operation, visual inspection or the position of the intraocular lens loop suspended by a pure straight needle head is adopted for positioning, the exact position behind the corneal limbus and the symmetry of a suture site cannot be accurately positioned, axial translation deviation of an optical area of the intraocular lens is easily caused, and therefore the postoperative visual quality is influenced.

In the normal cataract operation, the artificial lens is implanted in a lens capsule bag to keep the correct position of the artificial lens, however, when the capsular bag is lost or the position is abnormal due to trauma, congenital dangling ligament dysplasia or other reasons, the artificial lens needs to be fixed through a suture, one key factor of postoperative vision recovery is whether the suture position of the artificial lens is symmetrical, once the suture position of the suspended artificial lens is asymmetrical, the deviation or irregular astigmatism of the central optical area of the artificial lens is caused, the aberration is seriously influenced, and the postoperative vision recovery and the postoperative visual quality are seriously influenced.

Clinically, the intraocular lens is suspended by adopting a two-point or three-point scleral suspension method, and the key point of the operation is to suture and fix the intraocular lens in the ciliary sulcus, wherein the fixed positions of two loops of the intraocular lens are equal in distance from the limbus and just pass through the center of the cornea. At present, a straight needle head is mostly used for roughly positioning the position of a suspended intraocular lens loop (namely a suspended point) in a suspended intraocular lens implantation operation, and the orientation of the suspended point and the distance from the suspended point to the corneal limbus cannot be accurately judged, so that the problems of non-centering, inclination, deviation of the lens position from the front or back, axial translation deviation of the intraocular lens optical area and the like are easy to occur after the operation, and the postoperative visual quality of a patient is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve the difficult problem that exists among the above-mentioned prior art, provide a multi-functional locator is used in ophthalmic surgery, can quantify the accurate positioning to the astigmatism axle of cornea center summit, astigmatism intraocular lens and the sclera seam point that suspends intraocular lens in midair, avoid the postoperative to appear cornea implant skew, toric intraocular lens astigmatism axle offset, intraocular lens not placed in the middle, slope, crystal position skew scheduling problem.

The utility model discloses a realize through following technical scheme:

a multi-functional locator for ophthalmic surgery, the multi-functional locator for surgery includes: a positioning ring and a positioning rod;

the positioning ring comprises two coaxial rings which are connected into a whole, namely an inner ring and an outer ring positioned outside the inner ring;

the upper surface of the inner ring is a concave upper annular arc surface, the upper edge of the upper annular arc surface is the excircle of the upper surface of the inner ring, and the lower edge of the upper annular arc surface is the inner circle of the inner ring;

and two ends of the positioning rod are respectively connected with the inner circle of the inner ring and are positioned on one diameter of the inner circle.

The utility model is further improved in that the lower surface of the inner ring is a concave lower annular cambered surface, and the lower annular cambered surface is attached to the physiological radian of the cornea;

the upper edge of the lower annular cambered surface is an inner circle of the inner ring, and the lower edge of the lower annular cambered surface is an outer circle of the lower surface of the inner ring;

the excircle of the upper surface of the inner ring is the same as the excircle of the lower surface of the inner ring in size and is coaxial.

The utility model is further improved in that the thickness of the inner ring is gradually reduced from the excircle of the upper surface and the excircle of the lower surface to the inner circle;

the upper annular cambered surface is uniformly marked with 72 scale marks along the circumference, and the angle between every two adjacent scale marks is 5 degrees; the scale marks are marked with 0 °,5 °, 10 °, 15 °, … … 360 ° counterclockwise.

The utility model has the further improvement that the upper surface and the lower surface of the outer ring are both annular planes, and the upper surface and the lower surface are parallel;

the inner circle of the upper surface of the outer ring and the outer circle of the upper surface of the inner ring are the same circle;

the inner circle of the lower surface of the outer ring and the outer circle of the lower surface of the inner ring are the same circle.

The utility model has the further improvement that 12 linear pores are uniformly arranged on the outer ring along the circumference, namely, one linear pore is arranged at every 30 degrees;

the length direction of each linear pore is along the diameter direction of the outer ring;

the open end of each linear pore is arranged at the outer circle of the outer ring, the blind end of each linear pore is arranged at the inner circle of the outer ring, and each linear pore penetrates from the upper surface of the outer ring to the lower surface of the outer ring;

scales are respectively marked on the two sides of each linear pore along the length direction of the pore.

The utility model is further improved in that a locating hole for the central vertex of the cornea is arranged at the center of the locating rod;

axial positioning holes are respectively formed in two ends of the positioning rod;

two axial positioning holes are symmetrically distributed on two sides of the central vertex positioning hole of the cornea.

Preferably, one end of the positioning rod corresponds to a position marked on the inner ring by 0 degree, and the other end of the positioning rod corresponds to a position marked on the inner ring by 180 degrees;

scales are sequentially marked on the positioning rod from the central vertex positioning hole of the cornea to two ends respectively.

Preferably, the width of the inner ring is 1.5 mm;

the inner diameter of the inner ring is 9-12 mm;

the width of the outer ring is 2 mm;

the thickness of the outer ring is 4-6 mm.

The diameter of the cornea central vertex positioning hole is 0.5 mm.

The utility model is further improved in that the multifunctional positioner for ophthalmic surgery further comprises a handle which is a long rod-shaped structure, and one end of the handle is connected with the outer wall of the positioning ring through a connecting seat;

the straight line of the handle forms an included angle of 45 degrees with the central axis of the positioning ring;

the outer wall of the handle is provided with anti-skid patterns;

the length of the handle is 6-12 cm.

Preferably, the positioning ring, the positioning rod, the connecting seat and the handle are all made of medical non-reflective stainless steel materials;

the upper surface of the positioning ring is subjected to frosting or matte treatment.

Compared with the prior art, the beneficial effects of the utility model are that:

a multi-functional locator for ophthalmic surgery, the multi-functional locator for surgery includes: a positioning ring and a positioning rod;

the positioning ring comprises two coaxial rings which are connected into a whole, namely an inner ring and an outer ring positioned outside the inner ring;

the upper surface of the inner ring is a concave upper annular arc surface, the upper edge of the upper annular arc surface is the excircle of the upper surface of the inner ring, and the lower edge of the upper annular arc surface is the inner circle of the inner ring;

and two ends of the positioning rod are respectively connected with the inner circle of the inner ring and are positioned on one diameter of the inner circle.

The utility model discloses can use in the operation is hung in the cornea transplantation operation, astigmatic intraocular lens implantation operation and cataract suspension intraocular lens operation, can the position mark cornea central point, astigmatic axial and suspend intraocular lens's sclera seam point in midair, guaranteed accurate mark point among various ophthalmic surgery, realized going on of individualized accurate operation, have that multiple operation is suitable for, the operation is simple and easy, the location is accurate, good reproducibility, shorten operation operating time, guarantee advantages such as patient's postoperative obtains best visual effect.

Drawings

FIG. 1 is a top view of the present invention;

FIG. 2 is a front view of the present invention;

fig. 3 is a cross-sectional view of the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying drawings:

the utility model aims at overcoming the deficiencies of the prior art, providing a simple structure, convenient to use can furthest reduce the deviation of operation in-process cornea center location, alleviates the multipurpose locator of bending light error and artifical crystal position slope after the patient that leads to because of the intraoperative astigmatism axle location is inaccurate or suspend artifical crystal suture position deviation in midair.

The utility model discloses multi-functional locator is used in ophthalmic surgery has the effect of multi-functional location in different types of ophthalmic surgery, and is concrete, can be used to fix a position cornea central point in the operation is transplanted to the cornea, can be used to fix a position astigmatism axial in the operation is implanted to astigmatism intraocular lens, can be used to fix a position sclera seam point in suspending in midair the intraocular lens implantation.

As shown in fig. 1 to 3, the multifunctional positioner for ophthalmic surgery of the present invention comprises a positioning ring and a positioning rod 3. Since the positioning ring needs to be placed on the eyeball, the size of the positioning ring is very small, and for the sake of clearly showing the structure of the positioning ring, fig. 1 to 3 are schematic structural views of the positioning ring after being enlarged and the handle reduced.

The positioning ring comprises two coaxial rings which are connected into a whole, namely the central axes of the two rings are positioned on the same straight line, namely an inner ring 2 and an outer ring 1 positioned outside the inner ring, the inner ring 2 is a cornea astigmatism axis positioning mark ring, the upper surface of the inner ring 2 is a concave upper annular arc surface, the upper edge of the upper annular arc surface is the excircle of the upper surface of the inner ring, and the lower edge of the upper annular arc surface is the inner circle of the inner ring.

The slope that goes up the annular cambered surface and form is inside, promptly the thickness of inner ring 2 is from the excircle of upper surface, the excircle of lower surface to the interior circle reduces gradually, consequently its inner circle can directly laminate the cornea surface on the eyeball, like this the marker pen only need in the scale department direct mark of mark can, be difficult to produce offset. If the inner ring is equal in thickness from outside to inside, the corneal surface has a certain height from the inner circle of the outer ring, and when the marking pen is used for calibration, the pen point is easy to deviate to the center, so that the pen point deviates from the original marking point, and the marking is not accurate.

The embodiment of the utility model is as follows:

the first embodiment is as follows:

the upper annular arc surface is uniformly marked with 72 scale marks along the circumference, the angle between two adjacent scale marks is 5 degrees, the two adjacent scale marks are marked as 0 degree, 5 degrees, 10 degrees, 15 degrees, … … degrees to 360 degrees (the 0 degree and the 360 degrees are marked by the same line) counterclockwise, and the corresponding scale marks can be arranged as required. For clarity of illustration, not all the scale lines are drawn in fig. 3, and only four scale lines at 0 degrees (rightmost side), 90 degrees (upper side), 180 degrees (leftmost side), 270 degrees (lowermost side) are drawn with thin lines.

Example two:

the width design of inner ring 2 is 1.5mm, and the radius of two circularities that the excircle of inner ring 2, the interior circle of inner ring formed in the projection on same plane differs 1.5mm promptly, and the slope of the last annular cambered surface that forms like this is great relatively, marks the scale on it, and the area is bigger, and the typeface is more clear, better recognition.

Example three:

the lower surface of the inner ring 2 is a concave lower annular cambered surface, and the lower annular cambered surface is attached to the physiological radian of the cornea. The upper edge of the lower annular cambered surface is the inner circle of the inner ring 2, and the lower edge of the lower annular cambered surface is the outer circle of the lower surface of the inner ring 2. The excircle of the upper surface of the inner ring 2 is the same as the excircle of the lower surface in size, and is coaxial, that is, the central axes of the two excircles are located on the same straight line.

The size of the cornea of a human body is related to age, disease, or the like. Since the diameter of the neonatal cornea is about 9-10 mm, the transverse diameter of the normal adult cornea is about 11-12 mm, and the longitudinal diameter is about 10-11 mm, it is preferable that the inner diameter of the astigmatic axis positioning mark ring (i.e., the diameter of the inner circle of the inner ring) is 9-12mm, for example, 10mm, 10.5mm, or 11mm, or 11.5mm, or 12 mm.

Example four:

the upper surface and the lower surface of the outer ring 1 are both annular planes, and the upper surface and the lower surface are parallel. The inner circle of the upper surface of the outer ring 1 and the outer circle of the upper surface of the inner ring 2 are the same circle, and the inner circle of the lower surface of the outer ring 1 and the outer circle of the lower surface of the inner ring 2 are the same circle.

The outer ring 1 is uniformly provided with 12 linear pores 101 along the circumference, that is, one linear pore 101 is arranged at intervals of 30 degrees, the length direction of each linear pore 101 is along the diameter direction of the outer ring, that is, the 12 linear pores 101 are radially distributed on the outer ring 1, the open end of each linear pore 101 is at the outer circle of the outer ring 1, the blind end of each linear pore 101 is at the inner circle of the outer ring 1, and each linear pore 101 penetrates from the upper surface of the outer ring 1 to the lower surface of the outer ring. For clarity of illustration, not all of the linear apertures 101 are drawn in fig. 3, only four linear apertures at 0 degrees, 90 degrees, 180 degrees, 270 degrees are drawn, and the linear apertures are represented by straight lines.

Preferably, the width of the outer ring 1 is 2mm, that is, the radius difference between two circles formed by projecting the outer circle of the outer ring 1 and the inner circle of the outer ring on the same plane is 2 mm. The thickness of the outer ring 1 from the outside to the inside is the same, and preferably, the thickness of the outer ring 1 is 4 to 6 mm.

Example five:

scales are respectively marked on both sides of each linear aperture 101 along the length direction of the linear aperture, and schematic lines of the scales are marked on both sides of the linear aperture 101 with 90 degrees in fig. 1. Specifically, each linear aperture 101 is sequentially marked with 1mm and 2mm from the inner circle to the outer circle of the outer ring; wherein, the middle of every two scales is provided with 1 lattice which is similar to the arrangement of a centimeter ruler, so the scale mark of the linear pore 101 on the outer ring can be accurate to 0.5mm, and the more accurate scale arrangement can be carried out according to the requirement.

The graduations on either side of the linear aperture 101 are used to mark the distance from the limbus to the sclera. Because the suture site of most patient suspended crystals is between scleral layers 2mm away from the corneal limbus, the inner diameter of the inner ring 2 is the corneal ring, and the width of the inner ring 2 is 1.5mm, the junction of the inner and outer rings (i.e., the outer circle of the inner ring, the inner circle of the outer ring) is already 1.5mm behind the corneal limbus; the normal site of the interscleral suture in most patients is 0.5mm of the outer ring, i.e., 1.5mm +0.5mm is 2 mm; while some special patient suture points may require personalized customization: for example, an aphakic patient, a small eye, a short axis patient, or a pediatric eye suture site may be suitably close to the cornea, approximately 1.5-2mm behind the corneal scleral edge, i.e., 0-0.5mm of the outer ring marking line; while for patients with high myopia, the distance from the cornea is about 2.5-3.5mm behind the corneal scleral edge, i.e. the outer ring mark line is 1.0-2.0 mm.

Example six:

the both ends of locating lever 3 with holding ring fixed connection, it is specific, the both ends of locating lever 3 respectively with interior circle fixed connection of inner ring 2, and be located a diameter of interior circle. Specifically, the both ends of locating lever 3 are fixed on the interior circle of inner ring 2 through welding mode, and one end corresponds with the 0 department of marking on inner ring 2, and the other end corresponds with the 180 departments of marking on inner ring 2.

A cornea central apex positioning hole 301 is opened at the center of the positioning rod 3, and preferably, the diameter of the cornea central apex positioning hole 301 is about 0.5 mm. The purpose of the corneal central apex locator hole 301 is to facilitate marking of the corneal central apex through the hole with an ophthalmic marking pen.

Preferably, axial positioning holes 302 are respectively formed at two ends of the positioning rod, and the distance from each axial positioning hole 302 to the corneal central vertex positioning hole 301 is equal, that is, two axial positioning holes 302 are symmetrically distributed at two sides of the corneal central vertex positioning hole. Thus, the axial positioning marking of 0 degree and 180 degrees can be conveniently carried out. The specific principle is as follows: the horizontal position 0 degree and 180 degrees of two astigmatism axial marking points on the cornea are marked by a microscope before the operation, the marking points made before the operation can be seen clearly through the axial positioning holes 302 during the operation, so that the subsequent positioning is convenient, and the astigmatism axial marking of the patients is also convenient.

Preferably, the positioning rod 3 is marked with scales from the cornea center vertex positioning hole 301 at the center of the positioning rod to two ends, that is, the cornea center vertex positioning hole 301 is marked with 0, and the cornea center vertex positioning hole 301 is marked with 1, 2 and 3 … to two ends in sequence, so that whether the distances from the cornea center vertex to two sides are equal can be conveniently seen, and the cornea center vertex positioning hole 301 is ensured to be positioned at the center of the cornea, and the two sides are respectively positioned at the horizontal positions of 0 degrees and 180 degrees. For clarity of illustration, the numerical labels on the locating rods are not drawn in FIG. 3.

For example, the positioning rod is marked with 1mm,2mm,3mm,4mm,5mm,5.25mm,5.5mm,5.75mm and 6mm from the center to the left and right, respectively, so that the 5mm,5.25mm,5.5mm,5.75mm and 6mm on the two sides correspond to the horizontal diameter of the cornea of 10mm, 10.5mm, 11mm, 11.5mm and 12mm, respectively. During actual use, a plurality of models of positioners can be designed according to the diameter of the cornea, the diameter of each model of positioner is different, for example, model A corresponds to 10mm, model B corresponds to 10.5mm, model C corresponds to 11mm, and so on. After the diameter of the cornea of a patient is determined before an operation, a positioner of a corresponding model is selected according to the diameter of the cornea.

Whether the cornea diameter of confirming before the operation is accurate still can be used for verifying to the scale on the locating lever 3, and is concrete, according to the cornea diameter of confirming before the operation selection corresponding locator, if can see the mark point on the patient eyeball from the axial locating hole 302 at 3 both ends of locating lever, two holes have aimed at the mark point promptly, then can judge that the cornea diameter of confirming before the operation is accurate, if can't aim at, can judge the locator of which kind of model that needs to be traded through the scale on the locating lever. The scale on the positioning rod can be used for calibrating or measuring the size of the irregular graft, for example, the diameter of the graft to be taken is 8mm, the graft can be marked on 4mm of two sides of the midpoint after the donor and the receptor mark the midpoint, and if the graft is 9mm, the graft can be marked on 4.5mm of two sides of the midpoint.

The diameter of the cornea is divided into a horizontal diameter and a vertical diameter, the marking of the central vertex of the cornea is generally carried out by adopting the horizontal diameter, positioning holes at two ends of a positioning rod are respectively aligned to the scleral margin at 0 degree and 180 degrees during the operation, and if the vertical diameter of the cornea needs to be known, the cornea can be known by only placing the positioning rod at the vertical position.

During operation, a marking pen is used for marking the central vertex of the cornea through the central vertex positioning hole 301 of the cornea on the positioning rod 3 (a special and special superfine ophthalmic operation marking pen which is disinfected at high temperature is used, the material of marking pigment is safe, reliable and free of side effect, dyes such as trypan blue, brilliant blue and indocyanine green are generally adopted, finished products are sold by companies such as American Alcon and the like, a blunt 26G needle head can be used for dipping sterile dyes through a hole for marking, the deviation of the central positioning of the cornea in the operation process is reduced to the maximum extent, the alignment accuracy and the centering performance of a graft bed in the corneal transplantation operation are improved, and the occurrence of postoperative iatrogenic astigmatism is reduced.

Example seven:

the locator further comprises a handle 5, wherein the handle 5 is a long rod-shaped structure, and one end of the handle is connected with the locating ring through a connecting seat 4. The straight line of the handle 5 forms an included angle of 45 degrees with the central axis of the positioning ring. For convenient use, the central line of the connecting seat 4 and the 0-degree scale mark and the 180-degree scale mark on the inner ring 2 are positioned on the same straight line.

Preferably, the shape of connecting seat 4 can adopt multiple shape, and for example cylinder, cuboid, cube all can, and the connecting seat that is wide can make the tourus of some weight relatively more steady, and the focus is more steady, is difficult to the slope.

Preferably, the outer wall of the handle 5 is provided with anti-slip patterns, and the length of the handle 5 is 6-12cm, so that the handle can be conveniently held by hands. Preferably, the handle has a circular cross-sectional shape. For clarity of illustration, the length and diameter of the handle are reduced and the size of the retaining ring is enlarged in fig. 1-3.

Example eight:

the positioning ring, the positioning rod 3, the connecting seat 4 and the handle 5 of the utility model are made of medical non-reflective stainless steel materials. The upper surface (including the upper surface of the upper annular cambered surface and the outer ring) of the positioning ring is subjected to frosting or matte treatment, so that reflected light can be dispersed, a microscope light source can be reflected to four positions, and an operator can more clearly read scales on the positioning ring.

The scales on the inner ring of the utility model are accurate to 5 degrees, thus improving the accuracy of the astigmatic locating shaft; and the inner ring is provided with scale marks with inward slopes, so that the marks are more accurate and convenient. Through operation special marking pen mark astigmatism axle position, moreover the utility model discloses a tooth or blade point are not established at the back, but design for smooth concave surface, have protected patient's cornea to it is good with patient's cornea laminating, make things convenient for the axial of accurate mark location astigmatism intraocular lens.

The utility model discloses specific application method in different operations is as follows:

(1) central apex positioning for keratoplasty:

under the operating microscope, the accessible the utility model discloses an axial locating hole location corneoscleral reason of locating lever both sides, through cornea central summit locating hole location cornea central summit to the cornea center of location implant and bed of planting can realize individualized location cornea central summit, does benefit to the two to closing well and sew up the accuracy. The peripheral ring is suitable for comparing the corneas of patients with different cornea diameters, and the central vertex of the cornea is individually positioned and marked, so that the success rate of the operation of the patient with cornea transplantation is improved.

(2) Astigmatic axis positioning of toric intraocular lenses:

marking horizontal 0-degree and 180-degree axes on a cornea through a slit lamp before an operation, calculating the astigmatic axis position of the toric intraocular lens on line, buckling the positioning ring on the cornea during the operation, enabling the lower annular arc surface of the positioning ring to be attached to the cornea, aligning axial positioning holes on two sides of the positioning rod with two axes (the eye position of a patient lies flat and then rotates) marked by the slit lamp before the operation by 0-degree and 180-degree (the preoperative examination has accurate data from white to white (namely the diameter of the horizontal cornea), selecting positioners of different models according to different results), aligning the two axes with the corneal limbus, reading the reading on the positioning rod to know the diameter of the cornea of the patient, and if the two sides are 6mm, the diameter of the horizontal cornea of the patient is 6 x 2 ═ 12 mm; the central vertex of the cornea can be marked by aligning the marking pen special for ophthalmology with the central vertex positioning hole of the cornea on the positioning rod.

Align the limbus of 0 and 180 with the axial positioning hole of locating lever both sides, find the astigmatism axis axial that needs the mark (can follow different patients' inspection results before the operation according to the scale value on the inner ring, utilize current computational formula can reach the toric intraocular lens astigmatism degree (T3-T9) that this patient needs to use and the axis position of intraocular lens astigmatism axis), follow with special marker pen of ophthalmic surgery go up annular cambered surface mark astigmatism axis axial, mark out two points of limbus promptly, after implanting the intraocular lens, make peripheral locating hole of intraocular lens optical part and utilize the utility model discloses the astigmatism axis of mark is located same straight line and can be guaranteed the correct implantation of intraocular lens to ensure astigmatism axial in the operation.

(3) Scleral suture placement for suspended intraocular lens

The suspended artificial lens usually has a two-loop, three-hole and four-hole design, therefore, the surgeon needs to perform two-point, three-point or four-point scleral interlayer suture fixation according to the type of the suspended artificial lens, and for a conventional adult patient, the 0.5mm scale position of the outer ring with the span of 180 degrees (two-point suture) or 120 degrees (three-point suture) or even 90 degrees (four-point suture) is selected, namely the position of the ciliary sulcus 2mm behind the corneal scleral edge is marked (a marker pen can be adopted, the tip of the marker pen for ophthalmology is thin, and a blunt needle head 33G (the diameter is 0.2mm) coated by a coloring agent can also be adopted.

During operation, firstly, the central point of the cornea of a patient is calibrated through the locating hole of the central vertex of the cornea, then two, three or four points which are symmetrically distributed are selected, and a marking pen is used for marking the linear aperture of the corresponding sclera suture point (for example, the position 2mm behind the limbus) for example, the position 0.5mm away from the outer ring, for example, the position 0.5mm away from the limbus of the patient is marked at the inner circle of the inner ring, the width of the inner ring is 1.5mm, therefore, the position 2mm away from the limbus of the cornea is the position 2mm away from the inner edge of the inner ring, the width of the inner ring is reduced by 1.5mm away from the inner ring, and the remaining position. The central plane of the linear pore and the central axis of the positioning ring are positioned in the same plane, namely the extension line of the projection of the central plane of the linear pore on the horizontal plane passes through the projection of the central axis of the positioning ring on the horizontal plane, namely the circle center, so that the mark points not only pass through the center of the cornea, but also are 2mm away from the corneal limbus and are uniformly distributed, and the scleral suture site of the suspended artificial lens with two loops, three loops or four loops can be accurately positioned. Then the artificial lens loop is fixed between the marked scleral layers through suspension suture, and the precision and symmetry of the suture position are realized.

To sum up, when the cornea transplantation operation is carried out, the positioning ring of the positioner of the utility model is buckled on the cornea, the corneal limbus is used as the reference, the distance between the corresponding scales on the two sides of the rod and the center is ensured to be equal, the cornea center can be determined, and the preparation of the implant bed in the cornea transplantation and the accurate involution of the implant bed are ensured; when the toric intraocular lens implantation is carried out, the astigmatic axis locus of the astigmatic intraocular lens is accurately positioned according to the precise scale on the positioner of the utility model, thereby correcting the astigmatic problem of cataract patients and obtaining better visual function; when suspending in midair intraocular lens implantation, utilize the utility model discloses the accurate positioning sclera suspends in midair the point, ensures intraocular lens's symmetry to guarantee that intraocular lens optics district is located the center, eliminate the axiality deviation, improve patient postoperative vision quality and satisfaction.

The above technical solution is only an implementation manner of the present invention, and for those skilled in the art, based on the principle disclosed in the present invention, various modifications or variations can be easily made, and not limited to the structure described in the above specific embodiments of the present invention, so that the foregoing description is only preferred, and not restrictive.

Claims (10)

1. The utility model provides a multi-functional locator is used in ophthalmic surgery which characterized in that: the multi-functional locator is used in operation includes: a positioning ring and a positioning rod;

the positioning ring comprises two coaxial rings which are connected into a whole, namely an inner ring and an outer ring positioned outside the inner ring;

the upper surface of the inner ring is a concave upper annular arc surface, the upper edge of the upper annular arc surface is the excircle of the upper surface of the inner ring, and the lower edge of the upper annular arc surface is the inner circle of the inner ring;

and two ends of the positioning rod are respectively connected with the inner circle of the inner ring and are positioned on one diameter of the inner circle.

2. The multi-functional locator for ophthalmic surgery of claim 1, wherein: the lower surface of the inner ring is an upper concave lower annular cambered surface, and the lower annular cambered surface is attached to the physiological radian of the cornea;

the upper edge of the lower annular cambered surface is an inner circle of the inner ring, and the lower edge of the lower annular cambered surface is an outer circle of the lower surface of the inner ring;

the excircle of the upper surface of the inner ring is the same as the excircle of the lower surface of the inner ring in size and is coaxial.

3. The multi-functional locator for ophthalmic surgery of claim 2, wherein: the thickness of the inner ring is gradually reduced from the excircle of the upper surface to the excircle of the lower surface;

the upper annular cambered surface is uniformly marked with 72 scale marks along the circumference, and the angle between every two adjacent scale marks is 5 degrees; the scale marks are marked with 0 °,5 °, 10 °, 15 °, … … 360 ° counterclockwise.

4. The multi-functional locator for ophthalmic surgery of claim 3, wherein: the upper surface and the lower surface of the outer ring are both annular planes, and the upper surface and the lower surface are parallel;

the inner circle of the upper surface of the outer ring and the outer circle of the upper surface of the inner ring are the same circle;

the inner circle of the lower surface of the outer ring and the outer circle of the lower surface of the inner ring are the same circle.

5. The multi-functional locator for ophthalmic surgery of claim 4, wherein: 12 linear pores are uniformly arranged on the outer ring along the circumference, namely, one linear pore is arranged at every 30 degrees;

the length direction of each linear pore is along the diameter direction of the outer ring;

the open end of each linear pore is arranged at the outer circle of the outer ring, the blind end of each linear pore is arranged at the inner circle of the outer ring, and each linear pore penetrates from the upper surface of the outer ring to the lower surface of the outer ring;

scales are respectively marked on the two sides of each linear pore along the length direction of the pore.

6. The multi-functional locator for ophthalmic surgery of claim 5, wherein: a cornea central vertex positioning hole is formed in the center of the positioning rod;

axial positioning holes are respectively formed in two ends of the positioning rod;

two axial positioning holes are symmetrically distributed on two sides of the central vertex positioning hole of the cornea.

7. The multi-functional locator for ophthalmic surgery of claim 6, wherein: one end of the positioning rod corresponds to the position marked by 0 degree on the inner ring, and the other end of the positioning rod corresponds to the position marked by 180 degrees on the inner ring;

scales are sequentially marked on the positioning rod from the central vertex positioning hole of the cornea to two ends respectively.

8. The multi-functional locator for ophthalmic surgery of claim 7, wherein: the width of the inner ring is 1.5 mm;

the inner diameter of the inner ring is 9-12 mm;

the width of the outer ring is 2 mm;

the thickness of the outer ring is 4-6 mm;

the diameter of the cornea central vertex positioning hole is 0.5 mm.

9. The multi-functional ophthalmic surgical positioner of claim 8, wherein: the multifunctional positioner for the ophthalmic surgery further comprises a handle, wherein the handle is of a long rod-shaped structure, and one end of the handle is connected with the outer wall of the positioning ring through a connecting seat;

the straight line of the handle forms an included angle of 45 degrees with the central axis of the positioning ring;

the outer wall of the handle is provided with anti-skid patterns;

the length of the handle is 6-12 cm.

10. The multi-functional ophthalmic surgical positioner of claim 9, wherein: the positioning ring, the positioning rod, the connecting seat and the handle are all made of medical non-reflective stainless steel materials;

the upper surface of the positioning ring is subjected to frosting or matte treatment.

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