Double-head cornea foreign body remover

Abstract

The utility model discloses a double-head cornea foreign body remover, which belongs to the technical field of ophthalmology medical instruments and comprises a handle, one end of the handle is rotatably connected with an arc-shaped knife component, the arc-shaped knife component comprises an arc-shaped knife rotatably connected with the handle, and the other end of the handle is rotatably connected with a removing needle head component. The removing needle head assembly comprises a removing needle head rotationally connected with the handle. The arc-shaped knife assembly is used for prying and shoveling foreign matters from the cornea surface along the edges of the foreign matters and removing polluted cornea tissues around the foreign matters; the removing needle head assembly is used for removing small foreign matters and scraping polluted tissues on the superficial surface of the cornea.

Description

TECHNICAL FIELD

[0001] The utility model belongs to ophthalmic medical instrument technical field, especially relate to a double -end corneal foreign body remover. BACKGROUND

[0002] Cornea is the transparent part of the outer layer of the eyeball, accounting for about 1 / 6 of the outer layer of the eye. The central part of the cornea is the thinnest, about 0.5mm, and the peripheral part is the thickest, about 1mm. Corneal foreign body refers to the accidental entry of foreign bodies such as dust, metal debris, small insects, wood chips and plant husks into the cornea, which is an ophthalmic emergency. Usually, patients with corneal foreign bodies have strong foreign body sensation, photophobia and tearing symptoms, and the foreign body in the pupil area can affect vision, so it must be sent to the hospital for foreign body removal. The operation process of the doctor to remove the foreign body is the corneal foreign body removal.

[0003] The existing corneal foreign body removal instrument has a sterile injection needle for removing small foreign bodies, an eye curette for removing shallow foreign bodies and scraping eye surface lesion tissue, a foreign body forceps for clamping eye surface foreign bodies, and a trephine for cutting and removing rust rings. Some instruments have multiple models. During the operation, the doctor can select multiple instruments according to the size, shape, nature and attachment depth of the corneal foreign body of the patient. Sometimes, the time spent on selecting and replacing instruments is even longer than the operation time. The original intention of the present application is to develop an ophthalmic instrument suitable for multiple scenarios, to shorten the time spent by doctors in frequently replacing instruments during corneal foreign body removal, to improve the convenience of corneal foreign body removal operation, and to improve the efficiency and success rate of the operation.

[0004] The Chinese utility model patent with publication number CN221154493U discloses a corneal foreign body remover, which comprises a handle part and a spoon-shaped part. The handle part is connected to the spoon-shaped part at one end. The center of the spoon-shaped part is curved compared to the edge, forming a storage space. The edge of the spoon-shaped part is divided into a first partition and a second partition along the axis centerline of the handle part. The first partition is provided with a sharp edge, and the second partition is provided with a reverse sharp object. In this patent, the first partition for scraping and the second partition for removing are located on both sides of the front end of the spoon-shaped part, so that the scraping and removing operations can be switched without replacing the instrument, improving the operation efficiency. However, the sharp edge of the first partition and the reverse sharp object of the second partition are very close to each other, and both are very sharp. Therefore, special caution is needed during the operation of this instrument, especially when the spoon-shaped part is turned to a large angle, to prevent the patient or the doctor from being accidentally injured by the non-operating partition. In addition, the reverse sharp object of the second partition is relatively large in size compared to the size of the eye, which makes it difficult for the doctor to observe most of the view of the sharp end during delicate operations such as picking and digging. UTILITY MODEL CONTENTS

[0005] The utility model discloses a double-head corneal foreign body remover to solve the problems of the prior art.

[0006] To achieve the above object, the utility model provides the following scheme: the utility model provides a double-head corneal foreign body remover, including handle, one end of handle is rotatably connected with arc knife assembly, the arc knife assembly includes the arc knife with handle rotatable connection, the other end of handle is rotatably connected with the removal needle head assembly, and the removal needle head assembly includes the removal needle head with handle rotatable connection.

[0007] Preferably, one end of the arc-shaped knife close to the handle is fixedly connected with a first extension arm, the first extension arm and the handle are rotatably connected through a rotary joint, one end of the removal needle head close to the handle is fixedly connected with a second extension arm, and the second extension arm and the handle are rotatably connected through the rotary joint.

[0008] Preferably, one end of the first extension arm and the second extension arm close to the rotary joint is respectively fixedly connected with a rotating shaft, a first groove is arranged in the rotary joint, a rotating shaft hole is symmetrically arranged in the first groove, and the rotating shaft is rotatably connected in the rotating shaft hole.

[0009] Preferably, a threaded hole is arranged on one side of the first groove, a positioning screw is threadedly connected in the threaded hole, and the positioning screw abuts against the arc-shaped knife and the removal needle head respectively.

[0010] Preferably, the total length of the arc-shaped knife is 10 mm, the diameter of the longitudinal section of the blade part of the arc-shaped knife is 1-2 mm, and the arc length of the arc-shaped knife is between 1 / 4 arc and 1 / 3 arc.

[0011] Preferably, the arc-shaped knife is entirely arc-shaped spoon-shaped, and the longitudinal section of the front blade part of the arc-shaped knife is the same in shape as the longitudinal section of the rear spoon-shaped part.

[0012] Preferably, the blade part of the arc-shaped knife is provided with a scale line for reference of cutting depth at a position 0.2-0.25 mm away from the front end thereof.

[0013] Preferably, the removal needle head is entirely triangular, the triangular part with a needle tip at the front end of the removal needle head is lengthened and upturned, and the two sides of the needle tip are both sharp edges.

[0014] Preferably, the total length of the removal needle head is 5-7 mm, the width is 2-4 mm, and the angle of the upturned needle head at the front end of the removal needle head is 0° to 30°.

[0015] Preferably, the first extension arm and the second extension arm are respectively at an angle of 140°-180° with the handle, and the bending direction of the first extension arm is the concave direction of the arc-shaped knife arc surface, and the bending direction of the second extension arm is the direction of the tip of the ejection needle.

[0016] The utility model discloses the following technical effects: the utility model discloses the arc-shaped knife assembly and ejects the needle component combination on the same ophthalmic instrument, has met the operation demand of most corneal foreign body removal, has reduced the frequency of replacing instrument in corneal foreign body removal surgery greatly, and the improved arc-shaped knife and eject the needle have stronger practicality, and the implementation efficiency of corneal foreign body removal surgery has improved greatly. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings constituting a part of this application are used to provide further understanding of the application, the illustrative embodiment of the application and its description are used to explain the application, and do not constitute improper limitation to the application. In the drawings:

[0018] Figure 1 It is the structure schematic diagram of the utility model double -end corneal foreign body ejector;

[0019] Figure 2 It is the structure schematic diagram of the utility model handle;

[0020] Figure 3 It is the structure schematic diagram of the utility model rotating joint;

[0021] Figure 4 It is the structure schematic diagram of the utility model arc-shaped knife assembly;

[0022] Figure 5 It is another angle structure schematic diagram of the utility model arc-shaped knife assembly;

[0023] Figure 6 It is the structure schematic diagram of the utility model ejects needle component;

[0024] Figure 7 It is another angle structure schematic diagram of the utility model ejects needle component;

[0025] Figure 8 It is the structure schematic diagram of the positioning screw;

[0026] Figure 9 It is the structure schematic diagram of the arc-shaped knife assembly and ejects the needle component bending 140 °;

[0027] Figure 10 It is Figure 9A-A direction cross-sectional view;

[0028] Figure 11 Arc-shaped knife assembly horizontal direction axis measurement drawing;

[0029] Figure 12 Ejection needle assembly horizontal direction structure schematic view.

[0030] In the figure: 1, handle; 2, arc-shaped knife; 3, ejection needle; 41, first extension arm; 42, second extension arm; 5, rotation shaft; 6, rotation shaft hole; 7, threaded hole; 8, positioning screw; 9, rotation joint. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0032] In order to make the above-mentioned purposes, features and advantages of the utility model more apparent, obvious and easy to understand, the utility model will be further described in detail below with reference to the drawings and specific embodiments.

[0033] Referring to Figures 1-12 The embodiment provides a double-head corneal foreign body ejector, which comprises a handle 1, one end of the handle 1 is rotationally connected with an arc-shaped knife 2 assembly, the arc-shaped knife 2 assembly comprises the arc-shaped knife 2 rotationally connected with the handle 1, the other end of the handle 1 is rotationally connected with an ejection needle 3 assembly, and the ejection needle 3 assembly comprises the ejection needle 3 rotationally connected with the handle 1.

[0034] The arc-shaped knife 2 assembly is used for prying up and shoveling out foreign bodies from the surface of a cornea along the edges of the foreign bodies and removing contaminated corneal tissues (such as rust rings) around the foreign bodies; and the ejection needle 3 assembly is used for ejecting smaller foreign bodies and scraping contaminated tissues on the surface of the cornea.

[0035] Normal corneal thickness is usually 0.5 to 0.55 mm (central optical zone) and 0.7 to 1.0 mm (peripheral non-optical zone). Corneal foreign body ejection is a very delicate clinical operation and must be performed under a slit lamp microscope. When ejecting the foreign body, attention should be paid to not puncturing the cornea and not damaging normal corneal tissues. The arc-shaped knife 2 is provided with a scale line at the front end, so that the depth of cutting or scraping corneal tissues can be judged by a doctor, and the safety of operation can be improved.

[0036] The ophthalmologist will first conduct a detailed examination of the patient with foreign bodies in the eye, to confirm the location, size, material, shape (sharp degree), angle and depth of the cornea into the foreign body, etc. Corneal foreign body removal is mainly aimed at foreign bodies located in the superficial layer of the cornea.

[0037] Further optimization scheme, the arc-shaped knife 2 is fixedly connected with the first extension arm 41 close to one end of the handle 1, the first extension arm 41 and the handle 1 are rotatably connected through the rotating joint 9, the removal needle head 3 is fixedly connected with the second extension arm 42 close to one end of the handle 1, and the second extension arm 42 and the handle 1 are rotatably connected through the rotating joint 9.

[0038] Further optimization scheme, the first extension arm 41 and the second extension arm 42 are respectively and symmetrically fixedly connected with the rotating shaft 5 close to one end of the rotating joint 9, the rotating joint 9 is provided with a first recess, and the first recess is symmetrically provided with a rotating shaft hole 6, and the rotating shaft 5 is rotatably connected in the rotating shaft hole 6.

[0039] Further optimization scheme, one side of the first recess is provided with a threaded hole 7, the threaded hole 7 is threadedly connected with a positioning screw 8, and the positioning screw 8 abuts against the arc-shaped knife 2 and the removal needle head 3 respectively.

[0040] Further optimization scheme, the total length of the arc-shaped knife 2 is 10 mm, the diameter of the longitudinal section of the blade part of the arc-shaped knife 2 is 1-2 mm, and the arc length of the arc-shaped knife 2 is between 1 / 4 arc and 1 / 3 arc.

[0041] Further optimization scheme, the arc-shaped knife 2 is arc-shaped spoon-shaped as a whole, the longitudinal section of the front blade part of the arc-shaped knife 2 is the same as that of the rear spoon-shaped part, and both are arc-shaped, and the blade part and the spoon-shaped part are smoothly transitioned.

[0042] Further optimization scheme, the blade part of the arc-shaped knife 2 is provided with a scale line for reference of cutting depth at a distance of 0.2-0.25 mm from the front end thereof.

[0043] Further optimization scheme, the removal needle head 3 is triangular as a whole, the triangular part with a needle tip at the front end of the removal needle head 3 is lengthened and upturned, and both sides of the needle tip are sharp edges.

[0044] Further optimization scheme, the total length of the removal needle head 3 is 5-7 mm, the width is 2-4 mm, and the angle of the upturned needle head at the front end of the removal needle head 3 is 0° to 30°.

[0045] The sharp blade of the arc-shaped knife 2 is used to pry and shovel out the foreign matter from the surface of the cornea along the edge of the foreign matter; meanwhile, it can be used to remove the contaminated corneal tissue around the foreign matter, such as the rust ring. The front blade of the arc-shaped knife 2 can be slightly pressed along the annular edge of the rust stain and gently twisted to cut off the collagen fibers in the stroma layer of the edge of the rust ring, and then the rust ring can be prised and scraped out, and the rust ring can be completely removed.

[0046] Further optimization scheme, the first extension arm 41 and the second extension arm 42 are respectively 140°-180° included angle with the handle 1, and the bending direction of the first extension arm 41 is the concave direction of the arc surface of the arc-shaped knife 2, and the bending direction of the second extension arm 42 is the upturned direction of the tip of the pick-up needle 3. In this way, multi-angle foreign matter removal operation can be flexibly and barrier-free implemented.

[0047] In clinical practice, corneal foreign matter is usually metal fragments, sand, dust and the like, among which iron filings are more common. Iron filings can cause iron rust deposition in corneal tissue, forming a rust ring, which is a circular or circular-like lesion. At present, sterile injection needles are often used to remove the rust ring, but the needle tip is sharp and small, and often needs to be repeatedly picked, scraped and other operations, which is difficult to completely remove, and also easy to damage the surrounding normal corneal tissue. In addition, the corneal foreign matter trephine, that is, the knife head with a circular cross section, can also be used to remove the rust ring. The rust ring can be cut around by the trephine, and then removed by a spatula or foreign matter forceps and other instruments. First of all, the operation process needs to frequently change instruments, and the trephine cutting is not complete, and other instruments are also needed for cutting and removing; secondly, because the trephine blocks the line of sight, the doctor needs to strictly control the cutting depth to avoid cutting too deep or even penetrating the cornea, and the operation process is not intuitive and more complicated; thirdly, in the case that the diameter of the rust ring is smaller than the diameter of the trephine, the use of the trephine for cutting will increase the unnecessary cutting damage to the surrounding normal corneal tissue. In view of the above, the arc-shaped knife 2 is designed to gradually and shallowly cut and remove the foreign matter and the rust ring along the edge of the foreign matter and the rust ring, which minimizes the cutting damage to the surrounding normal corneal tissue, and at the same time, the foreign matter and the contaminated tissue can be shoveled out without frequent change of instruments, and the whole operation process is more simple, intuitive and controllable.

[0048] The handle 1 has an outer diameter of 10-12 mm and a length of 75-95 mm. The handle 1 is sized to be held by an operator. The arc-shaped knife 2 and the ejection needle 3 are small and delicate structures, and if they are directly connected to the two ends of the handle 1, the operator's line of sight will be blocked by the handle 1 when the operator is operating the arc-shaped knife 2 and the ejection needle 3. In addition, the close proximity of the thick handle 1 to the eyeball during surgery poses a serious threat to the safety of the surgery. Furthermore, there is no space under the slit lamp microscope to accommodate the movement of the thick handle 1. Therefore, two extension arms that are thin enough and have appropriate lengths are arranged to connect the arc-shaped knife 2 and the ejection needle 3 to the two ends of the handle 1, respectively, so that the utility model can be operated flexibly, safely and without obstacles under the slit lamp microscope. The handle-holding part of the handle 1 is provided with a texture that is integrally formed with the handle 1 to enhance the friction.

[0049] In the embodiment, the arc-shaped knife 2 has a total length of 10 mm, the longitudinal section of the blade part of the arc-shaped knife 2 has a diameter of 1.5 mm, and the arc length is 1 / 3 of the arc. The blade part of the arc-shaped knife 2 is provided with a scale line for reference to the depth of the knife at a position 0.2-0.25 mm away from the front end of the arc-shaped knife 2. The scale line is processed by etching. The ejection needle 3 has a total length of 6.5 mm and a width of 3 mm, and the front end of the needle is raised by 25°. The longitudinal section of the outer contour of the first extension arm 41 and the second extension arm 42 gradually changes from 6 mm at the proximal end of the handle 1 to 2 mm at the distal end of the handle 1, and the lengths of the two extension arms are both 15 mm. The handle 1 has an outer diameter of 10 mm and a length of 95 mm, and the surface of the handle-holding part of the handle 1 is provided with a concave-convex texture that is integrally formed with the handle 1.

[0050] As shown in Figure 3 , 4 , 5, 6, 7, the connecting ends of the two extension arms are each provided with a semicircular contact surface, and the two side surfaces of the connecting end at the center of the semicircle are provided with a pair of rotating shafts 5 that are integrally formed with the two extension arms; the connecting end of the handle 1 is in a groove shape, the inner wall of the groove-shaped connecting end is tangent to the semicircular surface of the two extension arms, and is provided with a pair of rotating shaft holes 6 that match the rotating shafts 5; as shown in Figure 10 , the upper and lower inner top surfaces of the groove-shaped connecting end respectively limit the two extension arms, so that the two extension arms can rotate within a limited angle around the rotating shafts 5; as shown in Figure 9 , 10 , the bending direction of the first extension arm 41 caused by the rotation is the concave direction of the arc surface of the arc-shaped knife 2, and the bending direction of the second extension arm 42 is the raised direction of the tip of the ejection needle 3.

[0051] As shown in Figure 3 , 8As shown in Fig. 9, a threaded hole 7 is arranged on one side of the groove-shaped connecting end of the handle 1, and a positioning screw 8 is matched with the threaded hole 7. By screwing the positioning screw 8 inward, the corresponding extension arm surface can be pressed, the friction between the extension arm surface and the groove-shaped connecting end is increased, and the extension arm surface cannot rotate, so that the positioning purpose is achieved. By unscrewing the positioning screw 8, the rotation angle of the corresponding extension arm can be adjusted.

[0052] Use process:

[0053] 1. The patient sits in front of a slit lamp, and is instructed to place the mandible on the mandibular support and press the forehead against the forehead support. The doctor checks the position, depth, nature and quantity of the corneal foreign body in the affected eye of the patient through the slit lamp.

[0054] 2. After the patient's affected eye is dropped with a surface anesthetic, the patient sits in front of the slit lamp as before. The doctor holds a sterile cotton swab soaked in normal saline with one hand, separates the patient's affected eye eyelid with the other hand, and gently wipes it to make the foreign body fall off. If the foreign body is not easy to remove, the doctor can select a suitable product of the utility model, hereinafter referred to as the remover, and determine the operation direction according to the eye where the foreign body is located and the position of the foreign body in the cornea, so as to adjust the direction of the suitable extension arm.

[0055] 3. The embedded foreign body is separated by using the removing needle 3 of the remover, and the foreign body can be scooped out by using the arc-shaped knife 2. If a rust ring is formed, the arc-shaped knife 2 of the remover can be used for removal. The front blade of the arc-shaped knife 2 is slightly pressed along the edge of the rust ring and is gently twisted, the cutting depth can be controlled by referring to the scale line on the arc-shaped knife 2, the shallow corneal tissue at the edge of the rust ring is cut off, and then the rust ring is gently scraped and pried up, so that the rust ring is gradually separated until it is completely removed.

[0056] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model.

[0057] The above-described embodiments are only preferred modes of the utility model, and do not limit the scope of the utility model, and various deformations and improvements of the technical scheme of the utility model made by those skilled in the art without departing from the design spirit of the utility model should fall within the protection scope determined by the claims of the utility model.

Claims

1. A double-ended corneal foreign body remover characterized by: It comprises a handle (1), one end of which is rotatably connected with an arc-shaped knife (2) assembly, which comprises an arc-shaped knife (2) rotatably connected with the handle (1), and the other end of the handle (1) is rotatably connected with a removing needle (3) assembly, which comprises a removing needle (3) rotatably connected with the handle (1).

2. The double ended corneal foreign body remover of claim 1, wherein: A first extension arm (41) is fixedly connected to one end of the arc-shaped knife (2) close to the handle (1), and the first extension arm (41) and the handle (1) are rotatably connected through a rotating joint (9), and a second extension arm (42) is fixedly connected to one end of the removing needle (3) close to the handle (1), and the second extension arm (42) and the handle (1) are rotatably connected through the rotating joint (9).

3. The double ended corneal foreign body remover of claim 2, wherein: The first extension arm (41) and the second extension arm (42) are respectively fixedly connected with rotating shafts (5) at one end close to the rotating joint (9), a first groove is arranged in the rotating joint (9), and rotating shaft holes (6) are symmetrically arranged in the first groove, and the rotating shafts (5) are rotatably connected in the rotating shaft holes (6).

4. The double ended corneal foreign body remover of claim 3, wherein: One side of the first groove is provided with a threaded hole (7), a positioning screw (8) is threadedly connected in the threaded hole (7), and the positioning screw (8) respectively abuts against the arc-shaped knife (2) and the removing needle (3).

5. The double ended corneal foreign body remover of claim 1, wherein: The total length of the arc-shaped knife (2) is 10 mm, the diameter of the longitudinal section of the blade part of the arc-shaped knife (2) is 1-2 mm, and the arc length of the arc-shaped knife (2) is between 1 / 4 arc and 1 / 3 arc.

6. The double ended corneal foreign body remover of claim 1, wherein: The arc-shaped knife (2) is overall arc-shaped spoon-shaped, and the longitudinal section of the front blade part of the arc-shaped knife (2) is the same as the longitudinal section of the rear spoon-shaped part.

7. The double ended corneal foreign body remover of claim 1, wherein: The blade part of the arc-shaped knife (2) is provided with a scale line for reference to the depth of the knife at a distance of 0.2-0.25 mm from the front end thereof.

8. The double ended corneal foreign body remover of claim 1, wherein: The removing needle (3) is overall triangular, the triangular part with a needle tip at the front end of the removing needle (3) is lengthened and upturned, and the two sides of the needle tip are both sharp edges.

9. The double ended corneal foreign body remover of claim 1, wherein: The total length of the removing needle (3) is 5-7 mm, the width is 2-4 mm, and the angle of the upturned needle tip at the front end of the removing needle (3) is 0°-30°.

10. The double ended corneal foreign body remover of claim 2, wherein: The first extension arm (41) and the second extension arm (42) form an included angle of 140°-180° with the handle (1), respectively, the bending direction of the first extension arm (41) is the concave direction of the arc surface of the arc-shaped knife (2), and the bending direction of the second extension arm (42) is the upturned direction of the tip of the removing needle (3).

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