CN113730092B - A corneal trephine - Google Patents

Abstract

The invention discloses a corneal trephine and relates to the technical field of ophthalmic medical instruments. A corneal trephine, comprising a sleeve, in which a transmission cylinder is rotatably connected, an eyepiece is provided on the transmission cylinder, an inner cylinder is slidably connected to the outside of the transmission cylinder, a limit block is provided at the lower end of the transmission cylinder, and a limit groove is provided inside the inner cylinder , the lower end of the inner cylinder is provided with a ring-shaped cutting head, the outer side of the inner cylinder is provided with a serrated annulus, the outer side of the sleeve is provided with a through groove, the through groove is provided with a baffle plate and a rotating shaft, and the rotating shaft is provided with a gear meshing with the serrated annulus. A fixing mechanism is arranged on the baffle, two support rods are rotatably connected to the lower end of the sleeve, tightening bolts are arranged on the support rods, expansion plates are provided at the lower ends of the support rods, and a light board is provided at the bottom of the sleeve. The corneal trephine adopting the solution of the invention can drill and cut the patient's cornea stably and conveniently.

Description

A corneal trephine

technical field

The invention belongs to the technical field of ophthalmic medical instruments, and in particular relates to a corneal trephine.

Background technique

Blinding corneal disease, diabetic retinopathy, and glaucoma have become the three leading blind eye diseases in the world today. Blinding keratopathy is mostly caused by infectious keratitis, corneal dystrophy, corneal degeneration, or corneal trauma. Currently, the only way to restore sight to patients with blinding corneal disease is a corneal transplant.

Therefore, improving the survival rate of corneal donors, perfecting corneal transplantation, and reducing intraoperative and postoperative complications are crucial to the success of corneal transplantation. In corneal transplantation, the process of cutting the patient's cornea with a corneal trephine is the most critical operation in the entire operation. However, since the cornea is horizontally elliptical, for lesions involving a large area, especially infectious keratitis, the existing trephine drills cannot completely fit the shape of the lesion when drilling and cutting the cornea, and it is easy to damage the upper and lower limbus.

In order to solve the above problems, Chinese patent (notification number CN210542040U) discloses a corneal trephine, including a handle, the front end of the handle is provided with an annular head, and there is also a ring-shaped head between the handle and the annular head. The connection part, the handle and the ring head are connected through the connection part and there is an angle between the axis where the handle is located and the plane where the ring head is located, the ring head is a non-circular structure, the The edge of the ring-shaped head is an arc with smooth transition, and the ring-shaped head is an axisymmetric figure.

Although the above-mentioned solution can fit the shape of the lesion when drilling and cutting the cornea and is not easy to be destroyed, its use effect is poor, it cannot expand and support the eyelid, it cannot be used stably, and it cannot be flexibly adjusted to control the drilling and reveal the bottom, which has limitations.

Contents of the invention

The object of the present invention is to provide a corneal trephine, which meets people's requirements for the corneal trephine to drill and cut the cornea stably and conveniently.

In order to solve the problems of the technologies described above, the technical solution of the present invention is as follows:

A corneal trephine, comprising a sleeve, a transmission cylinder is arranged inside the sleeve, a clasp is arranged on the outside of the transmission cylinder and is rotatably connected with the sleeve, an eyepiece is arranged on the upper end of the transmission cylinder, a vertical edge is arranged on the outside of the eyepiece, and the outside of the transmission cylinder slides Connected with an inner cylinder, the outer lower end of the transmission cylinder is provided with a limit block, the inner side of the inner cylinder is provided with a limit groove that fits with the limit block, the lower end of the inner cylinder is provided with a ring-shaped cutting head, the outer side of the inner cylinder is provided with a serrated ring surface, and the sleeve There is a through groove on the outside, and there are baffles on both sides of the through groove. There is a rotating shaft connected between the baffles. There is a gear on the rotating shaft. The gear meshes with the sawtooth ring surface. There are two support rods, the upper ends of the support rods are provided with locking bolts, and the lower ends of the support rods are provided with expansion plates.

Principle and effect of the technical solution of the present invention are as follows:

When it is necessary to drill and cut the patient's cornea, first make the patient lie flat on the operating bed, then turn the support rod, and hook the patient's eyelid with the expansion plate. After the eyelid is expanded, fix it with locking bolts, and then turn the gear, which drives the inner cylinder and the circular cutting head move downward. During the movement, the relative position of the patient's cornea and the circular cutter can be observed in real time through the eyepiece. After the circular cutting head moves to the target point, it is fixed with a fixing mechanism, and then the eyepiece and the transmission cylinder are rotated. The transmission cylinder drives the inner cylinder to rotate to drill and cut the patient's cornea.

A corneal trephine of the present invention is provided with a support rod, an expansion plate and a locking bolt. Compared with the prior art, the device of the present invention can expand and support the eyelid, and can be placed on the eye socket stably, with easy operation and strong stability; The invention is also provided with a sleeve, a transmission cylinder, an inner cylinder, an annular cutting head, a serrated annulus, a sawtooth and a fixing mechanism. Compared with the prior art, the present invention can precisely control the position of the annular cutting head; Groove, limit block and clasp, compared with the prior art, the present invention drills and cuts the cornea more stably; The present invention also has eyepiece, is more conducive to observation and operation.

Further, the fixing mechanism includes a fixing plate, one end of the fixing plate is rotationally connected with the baffle, the other end of the fixing plate is clamped with the corresponding baffle, and the inside of the fixing plate is provided with a locking block that fits with the gear.

In this way, the rotation of the gear can be limited by the fixing mechanism and the fixing plate, and the operation is simple and stable.

Further, the annular cutting head is threadedly connected with the inner cylinder, and the annular cutting head is provided with various specifications.

In this way, according to the patient's condition, the annular cutting heads of different specifications can be flexibly replaced, which is fast and convenient.

Further, the expansion boards are arranged in an arc shape, and the back sides of the two expansion boards are provided with arc-shaped hooks.

In this way, the spreader can better fit the eye socket and have a better hooking effect on the eyelid.

Further, a length marking line is provided on the circumferential side of the gear.

This enables precise control of the descending distance of the ring cutting head with reference to the length marking line.

Further, a light board is provided at the bottom of the sleeve.

This provides a bright light environment for the corneal incision through the light board.

Description of drawings

Fig. 1 is a structural schematic diagram of a corneal trephine of the present invention;

Figure 2 is a front sectional view of a corneal trephine of the present invention;

Figure 3 is an enlarged view of A in Figure 2;

Fig. 4 is a top sectional view of a corneal trephine according to the present invention;

The marks in the drawings are as follows: sleeve 1, drive cylinder 2, snap ring 3, eyepiece 4, inner cylinder 5, limit block 6, limit groove 7, annular cutting head 8, sawtooth ring surface 9, through groove 10. Baffle plate 11, rotating shaft 12, gear 13, support rod 14, expansion plate 15, fixing plate 16, clamping block 17, lamp plate 18.

detailed description

Below in conjunction with accompanying drawing and specific embodiment the present invention will be described in further detail:

As shown in Figure 1, Figure 2, Figure 3 and Figure 4, a corneal trephine includes a sleeve 1, a transmission cylinder 2 is arranged inside the sleeve 1, and a card that is rotatably connected to the sleeve 1 is installed on the outside of the transmission cylinder 2. Ring 3, eyepiece 4 is installed on the upper end of the transmission cylinder 2, vertical ribs are arranged on the outside of the eyepiece 4, the inner cylinder 5 is slidingly connected to the outer side of the lower part of the transmission cylinder 2, four limit blocks 6 are fixedly connected to the outer side of the lower end of the transmission cylinder 2, and the inner cylinder 5 There is a limit groove 7 on the inner side that fits with the limit block 6. The lower end of the inner cylinder 5 is threaded with an annular cutting head 8. The annular cutting head 8 has various types and specifications. The outer side of the inner cylinder 5 is provided with a serrated ring , the outer side of the sleeve 1 is provided with a through groove 10, the left and right sides of the through groove 10 are equipped with baffles 11, the two baffles 11 are rotatably connected with a rotating shaft 12, and the rotating shaft 12 is fixedly connected with a gear 13, the gear 13 and the sawtooth The ring surfaces 9 are meshed, and the circumference side of the gear 13 is marked with a length marking line. A fixing mechanism is installed on the baffle plate 11. The fixing mechanism includes a fixing plate 16. The left end of the fixing plate 16 is rotationally connected with the baffle plate 11 on the left side. The right end is clamped with the baffle plate 11 on the right side, a block 17 matching with the gear 13 is installed on the lower side of the fixed plate 16, a support rod 14 is connected to both sides of the lower end of the sleeve 1 in rotation, and the upper end of the support rod 14 is provided with a lock. Tighten the bolts, the lower ends of the support rods 14 are equipped with expansion plates 15, the expansion plates 15 are arranged in an arc shape, the two expansion plates 15 are provided with arc-shaped hooks on the back side, and the bottom of the sleeve 1 is provided with a lamp plate 18 .

When it is necessary to drill and cut the patient's cornea, first make the patient lie flat on the operating bed, then install a suitable annular cutting head according to the situation, then rotate the support rod 14, hook the patient's eyelid with the expansion plate 15, and then move the expansion plate 15 to expand the cornea. Support the eyelids, and then fix them with locking bolts, then open the fixing plate 16, turn the gear 13, the rotation of the gear 13 drives the sawtooth ring surface 9 and the inner cylinder 5 to move downward, and then drives the annular cutting head to move downward. During the movement, The operator can observe the relative position between the patient's cornea and the circular cutter in real time through the eyepiece 4, and after the circular cutter moves to the target point, it rotates and clamps the fixing plate 16 so that the clamping block 17 on the lower side of the fixing plate 16 engages with the sawtooth. Lock the gear 13, then turn the transmission cylinder 2, the vertical edge on the outer side of the upper end of the transmission cylinder 2 is more convenient to apply force, the rotation of the transmission cylinder 2 drives the limit block 6 to rotate, and then drives the limit groove 7, the inner cylinder 5 and the ring cutting head Rotate, and the annular cutting head drills and cuts the patient's cornea. After the drilling and cutting is completed, the locking bolt is externally rotated, and the device can be removed.

What is described above is only an embodiment of the present invention, and common knowledge such as specific structures and characteristics known in the scheme are not described here too much. It should be pointed out that for those skilled in the art, under the premise of not departing from the structure of the present invention, several modifications and improvements can also be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the implementation of the present invention. Effects and utility of patents. The scope of protection required by this application shall be based on the content of the claims, and the specific implementation methods and other records in the specification may be used to interpret the content of the claims.

Claims (1)

1. A corneal trephine, comprising: the novel support rod assembly is characterized by comprising a sleeve (1), wherein a transmission cylinder (2) is arranged in the sleeve (1), a clamping ring (3) rotationally connected with the sleeve (1) is arranged outside the transmission cylinder (2), an ocular (4) is arranged at the upper end of the transmission cylinder (2), a vertical edge is arranged on the outer side of the ocular (4), an inner cylinder (5) is slidably connected to the outer side of the transmission cylinder (2), a limiting block (6) is arranged at the lower end of the outer side of the transmission cylinder (2), a limiting groove (7) matched with the limiting block (6) is arranged on the inner side of the inner cylinder (5), an annular cutting head (8) is arranged at the lower end of the inner cylinder (5), a sawtooth ring surface (9) is arranged on the outer side of the inner cylinder (5), a through groove (10) is formed in the outer side of the sleeve (1), baffle plates (11) are arranged on two sides of the through groove (10), a rotating shaft (12) is rotatably connected between the baffle plates (11), a gear (13) is arranged on the rotating shaft (12), the gear (13) is meshed with the sawtooth ring surface (9), a fixing mechanism is arranged on the baffle plate (11), two lower ends of the sleeve (1) are rotatably connected with two support rods (14), a bolt (14), and a lower end of the support rod (14) is arranged on the support rod (14), and a lower end (15) is arranged on the support rod (14); the fixing mechanism comprises a fixing plate (16), one end of the fixing plate (16) is rotatably connected with the baffle (11), the other end of the fixing plate (16) is clamped with the corresponding baffle (11), and a clamping block (17) matched with the gear (13) is arranged on the inner side of the fixing plate (16); the annular cutting head (8) is in threaded connection with the inner cylinder (5), and the annular cutting head (8) is provided with various specifications; the expansion supporting plates (15) are arranged in an arc shape, and arc-shaped hooks are arranged on the back sides of the two expansion supporting plates (15); the circumference side of the gear (13) is provided with a length marking line; the lamp plate (18) is arranged at the bottom of the sleeve (1).

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