Vitreous cavity medicine injection speculum

Abstract

The application relates to the field of medical devices, in particular to a glass body cavity medicine injection eye speculum, which comprises an eye opening mechanism and a follow-up mechanism, the eye opening mechanism comprises a torsional spring and two eye opening units, each of the eye opening units comprises a supporting rod and an arc-shaped eye opening part, the supporting rods in the two eye opening units are connected through the torsional spring; the follow-up mechanism comprises a follow-up plate, a connecting unit and a limiting plate connected with one of the eye opening parts through the connecting unit, the other eye opening part can contact the limiting plate in the process of approaching of the eye opening parts in the two eye opening units, a through hole is arranged on the limiting plate, the follow-up plate is movably arranged in the limiting plate, and a needle hole is arranged on the follow-up plate. The technical scheme is favorable for improving the safety in the medicine injection process.

Description

Technical Field

[0001] This invention relates to the field of medical devices, specifically to an eyelid opener for intravitreal drug injection. Background Technology

[0002] Intravitreal injection is a common minimally invasive procedure in ophthalmology. During the procedure, the patient lies supine, the doctor disinfects the eyelids and surrounding skin, then instills topical anesthetic into the eye, drapes a sterile drape to expose the operated eye, and then applies a sterile ophthalmic surgical film to cover the eyelids and eyelashes. If the sterile ophthalmic surgical film does not have an exposed hole, the doctor needs to cut a hole to expose the operated eye. After that, an eyelid speculum is placed to open the eyelids, the conjunctival sac is rinsed and disinfected again, and the patient is instructed to fixate on a fixed target. The needle is inserted into the flat area above the temporal region to inject the intravitreal medication. Finally, the needle is removed, and the injection site is gently pressed with a cotton swab to end the procedure.

[0003] During the needle insertion and medication injection process, although patients are instructed to keep their eyes still, there is still a slight movement of the eyeballs. If the doctor cannot quickly follow the movement, it may cause the needle to scratch the cornea, lens, or retina. Alternatively, if the doctor moves the movement in time, the movement may be too large, which may also damage the patient's eyes. Summary of the Invention

[0004] The present invention aims to provide a blepharoplasty device for intravitreal drug injection to improve the safety of the drug injection process.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a vitreous cavity drug injection eyelid opener, comprising an eyelid opening mechanism and a follower mechanism. The eyelid opening mechanism includes a torsion spring and two eyelid opening units. Each eyelid opening unit includes a support rod and an arc-shaped eyelid opening portion. The support rods in the two eyelid opening units are connected by a torsion spring. The follower mechanism includes a follower plate, a connecting unit, and a limiting plate connected to one of the eyelid opening portions through the connecting unit. During the process of the eyelid opening portions of the two eyelid opening units approaching each other, the other eyelid opening portion can contact the limiting plate. The limiting plate is provided with a through hole. The follower plate is movably disposed within the limiting plate and is provided with a pinhole.

[0006] The beneficial effects of this approach are as follows: After the doctor pinches the support rods in the two eyelid opening units to bring the eyelid opening parts of the two eyelid opening units together, the eyelid opening device is placed. Under the action of the torsion spring, the eyelid opening part opens the eyelid. Then, the injection needle passes through the through hole and the needle hole to inject. If there is slight movement of the eyeball during the injection process, the follower plate will move with the eyeball, which can effectively reduce the risk of needle shaking caused by slight movement of the eyeball and intraocular tissue damage caused by the doctor's stress response.

[0007] Furthermore, during the process of the doctor bringing the two eyelid opening sections together, the eyelid opening section not connected to the limiting plate will contact and limit the opening section with the limiting plate. When the eyelid opening device is in place, the eyelid opening section will be opened under the action of the torsion spring. This synchronous limiting effect helps to prevent the preload force of the torsion spring from being completely canceled out and thus being over-compressed, ensuring that the opening of the eyelid opening section is within a linear and controllable range, thereby ensuring the accuracy of the eyelid opening section placement. It also helps to reduce the metal fatigue of the torsion spring and ensure that the eyelid opening is stably maintained for a smooth operation. The limiting design also ensures that the eyelid opening section does not need excessive force to be reset, nor does it require additional restriction of the opening operation. When the eyelid opening section is fully opened, the torsion spring will only apply a small outward force, which is beneficial to the patient's comfort, surgical operation, and eye health.

[0008] Specifically, the limiting design helps reduce strong stretching of the eyelid skin and muscles, thus reducing patient pain even under adequate topical anesthesia. It also avoids damage to the eyelid margin skin, meibomian gland compression, and levator palpebrae superioris aponeurosis caused by excessive pressure. Furthermore, the limiting design reduces eyelid stimulation, improving surgical safety. When the eyelid is subjected to excessive discomfort, it triggers the patient's instinctive protective reflex—Bell's phenomenon—causing the eyeball to involuntarily rotate upwards. For intraocular surgery, this can cause the surgical area to suddenly disappear from the field of vision, forcing the surgery to be interrupted. The surgeon must wait for the eyeball to reposition or administer additional anesthesia, significantly increasing the difficulty and risk of the surgery. Additionally, excessive eyelid traction creates an outward, circumferential pressure on the eyeball wall, which is directly transmitted to the inside of the eye, causing a sharp increase in intraocular pressure during surgery. This can lead to a series of chain reactions, such as increased pressure on the posterior capsule, seriously affecting surgical safety. Therefore, this approach comprehensively reduces surgical risks through both the follow-up design of the follow-up plate and the limiting design of the limiting plate.

[0009] Furthermore, the arc-shaped eyelid opening does not create a hard limit during the contact and limitation process with the limiting plate. It provides the doctor with tactile feedback of gradually increasing resistance. The predictable resistance eliminates doubts, meaning that the doctor can be completely confident that the eyelid opener has opened to the maximum position allowed by the design, without worrying about over-opening or doubting whether it is in place. This provides important psychological confirmation in delicate surgery. Moreover, this elastic limitation also provides a force for the repositioning of the eyelid opening to a certain extent, which can further reduce the preload design of the torsion spring.

[0010] Furthermore, the eyelid opening section includes a support block, an eyelid opening block, two connecting blocks, and four connecting strips. The support block is connected to the support rod, and each of the two connecting blocks is connected to the support block through a connecting strip. The connecting blocks can contact the limiting plate, and the limiting plate is connected to the connecting blocks through a connecting unit. The eyelid opening block is connected to the support block through two connecting strips.

[0011] Furthermore, the two connecting strips that connect the eyelid opening block and the support block are irregularly shaped.

[0012] Furthermore, spheres are rotatably mounted at each of the four corners of the upper and lower surfaces of the follower plate.

[0013] Furthermore, the limiting plate is provided with a groove that communicates with the through hole, and a cover plate is provided at the groove. The through hole also passes through the cover plate. The cover plate is also provided with an L-shaped slot, in which an L-shaped plug can be inserted. The plug is used for initial positioning of one corner of the follower plate.

[0014] Furthermore, the connecting unit includes two connecting parts, each of which includes a connecting rod or a telescopic rod. When the connecting part is a connecting rod, the limiting plate is connected to the connecting block through the connecting rod. When the connecting part is a telescopic rod, the telescopic rod includes an outer connecting tube, an inner connecting tube, and a locking screw. The outer connecting tube is connected to the connecting block, the inner connecting tube is connected to the limiting plate, and the inner connecting tube is slidably connected to the outer connecting tube. The outer connecting tube is provided with a threaded hole, and the locking screw is threadedly connected to the outer connecting tube and can lock the inner connecting tube.

[0015] Furthermore, the follower plate, the limiting plate, and the cover plate are all transparent. Attached Figure Description

[0016] Figure 1 This is a three-dimensional diagram of the present invention; Figure 2 This is a three-dimensional view of the eyelid opening portion of the present invention; Figure 3 This is a cross-sectional view of the limiting plate and the follower plate of the present invention.

[0017] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: torsion spring 1, strut 2, follower plate 3, limit plate 4, support block 5, opening block 6, connecting block 7, connecting strip 8, connecting rod 9, through hole 10, groove 11, cover plate 12, ball 13, pinhole 14, and insert block 15. Detailed Implementation

[0018] Example The basic implementation examples are as follows: Figure 1-3 As shown, Figure 1 The illustrated eyelid speculum for intravitreal drug injection includes an eyelid speculum mechanism and a follow-up mechanism. The eyelid speculum mechanism includes a torsion spring 1 and two eyelid speculum units. Each eyelid speculum unit includes a bent support rod 2 and an arc-shaped eyelid speculum portion. The support rods 2 in the two eyelid speculum units are connected by the torsion spring 1. Figure 2 , 3 As shown, the follower mechanism includes a follower plate 3, a connecting unit, and a limiting plate 4 connected to one of the eyelid opening parts through the connecting unit. During the process of the eyelid opening parts of the two eyelid opening units approaching each other, the other eyelid opening part can contact the limiting plate 4.

[0019] Specifically, the eyelid opening section includes a support block 5, an eyelid opening block 6, two connecting blocks 7, and four connecting strips 8. The support block 5 is fixedly connected to the support rod 2. Each of the two connecting blocks 7 is connected to the support block 5 through a connecting strip 8. The connecting block 7 in the right eyelid opening section can contact the limiting plate 4. The limiting plate 4 is connected to the connecting block 7 through a connecting unit. The eyelid opening block 6 is connected to the support block 5 through two connecting strips 8. The two connecting strips 8 connecting the eyelid opening block 6 and the support block 5 are irregularly shaped.

[0020] The connecting unit includes two connecting parts, each of which includes a connecting rod 9 or a telescopic rod. When the connecting part is a connecting rod 9, the limiting plate 4 is fixedly connected to the connecting block 7 through the connecting rod 9. When the connecting part is a telescopic rod, the telescopic rod includes a connecting outer tube, a connecting inner tube, and a locking screw. The connecting outer tube is fixedly connected to the connecting block 7, the connecting inner tube is fixedly connected to the limiting plate 4, and the connecting inner tube is slidably connected to the connecting outer tube. The connecting outer tube has a threaded hole, and the locking screw is threadedly connected to the connecting outer tube and can abut against the connecting inner tube to lock the connecting inner tube.

[0021] like Figure 3 As shown, the limiting plate 4 has a through hole 10 and a groove 11 communicating with the through hole 10. A cover plate 12 is provided at the groove 11. The installation here and the aforementioned fixed connection can be welded. The follower plate 3, the limiting plate 4, and the cover plate 12 are all transparent. The cover plate 12 also has a through hole 10. The follower plate 3 is movably disposed within the limiting plate 4. To improve the smoothness of sliding, a ball 13 is rotatably disposed at each of the four corners on the upper and lower surfaces of the follower plate 3. The follower plate 3 has a pinhole 14. The cover plate 12 also has an L-shaped slot, into which a device such as Figure 2 The L-shaped insert 15 shown is used to initially position one corner of the follower plate 3 so that the initial position of the needle hole 14 is located as close as possible to the middle of the through hole 10. After the injection needle passes through the needle hole 14, the insert 15 is pulled out.

[0022] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A vitreous cavity drug injection eyelid opener, characterized in that: It includes an eyelid opening mechanism and a follow-up mechanism. The eyelid opening mechanism includes a torsion spring and two eyelid opening units. Each eyelid opening unit includes a support rod and an arc-shaped eyelid opening part. The support rods in the two eyelid opening units are connected by a torsion spring. The follow-up mechanism includes a follow-up plate, a connecting unit, and a limiting plate connected to one of the eyelid opening parts through the connecting unit. During the process of the eyelid opening parts of the two eyelid opening units approaching each other, the other eyelid opening part can contact the limiting plate. The limiting plate is provided with a through hole. The follow-up plate is movably set in the limiting plate and is provided with a pinhole.

2. The eyelid opener for intravitreal drug injection according to claim 1, characterized in that: The eyelid opening section includes a support block, an eyelid opening block, two connecting blocks, and four connecting strips. The support block is connected to the support rod, and each of the two connecting blocks is connected to the support block through a connecting strip. The connecting blocks can contact the limiting plate, and the limiting plate is connected to the connecting blocks through a connecting unit. The eyelid opening block is connected to the support block through two connecting strips.

3. The eyelid opener for intravitreal drug injection according to claim 2, characterized in that: The two connecting strips that connect the eyelid opening block and the support block are irregularly shaped.

4. The eyelid opener for intravitreal drug injection according to claim 3, characterized in that: Each of the four corners on the upper and lower surfaces of the follower plate is equipped with a sphere.

5. The eyelid opener for intravitreal drug injection according to claim 4, characterized in that: The limiting plate has a groove that communicates with the through hole. A cover plate is provided at the groove, and the through hole also passes through the cover plate. The cover plate also has an L-shaped slot, in which an L-shaped plug can be inserted. The plug is used for initial positioning of one corner of the follower plate.

6. The eyelid opener for intravitreal drug injection according to claim 5, characterized in that: The connecting unit includes two connecting parts, each of which includes a connecting rod or a telescopic rod. When the connecting part is a connecting rod, the limiting plate is connected to the connecting block through the connecting rod. When the connecting part is a telescopic rod, the telescopic rod includes an outer connecting tube, an inner connecting tube, and a locking screw. The outer connecting tube is connected to the connecting block, the inner connecting tube is connected to the limiting plate, and the inner connecting tube is slidably connected to the outer connecting tube. The outer connecting tube is provided with a threaded hole, and the locking screw is threadedly connected to the outer connecting tube and can lock the inner connecting tube.

7. The eyelid opener for intravitreal drug injection according to claim 6, characterized in that: The follower plate, limit plate, and cover plate are all transparent.

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