Cornea acquisition negative pressure suction trephine device for eye library

Abstract

The utility model discloses a cornea negative pressure suction trephine device for an eye library, which is a device for obtaining a cornea graft from an eyeball of a donor, and comprises an adsorption ring which is positioned on the eyeball above the cornea and a trephine which is sleeved on the periphery of the adsorption ring and can rotate relative to the adsorption ring, an annular adsorption face capable of being adsorbed to the eyeball in a negative pressure suction mode is formed on the end face of the adsorption ring, the trephine comprises a circular ring component and a circular cutting part formed at the far end of the circular ring component and used for annularly cutting the sclera, and the circular ring component is arranged on the periphery of the end, close to the annular adsorption face, of the adsorption ring in a sleeving mode. Thus, the cornea acquisition negative pressure suction trephine device for the eye library can be provided, the cornea acquisition negative pressure suction trephine device for the eye library is suitable for acquiring a cornea graft with uniform sclera tissue from a donor in a rotary cutting mode, and extrusion damage to cornea endothelial cells can be effectively reduced.

Description

Technical Field

[0001] The utility model generally relates to the technical field of medical devices, and in particular to a negative pressure suction trephine device for obtaining corneas used in an eye bank. Background Art

[0002] Corneal graft refers to the human corneal tissue donated in vitro by the corneal donor (also known as the donor) after his / her death. Corneal grafts are mainly used in corneal transplantation surgery to treat various corneal diseases such as keratoconus, corneal ulcers and corneal perforations. In addition to the cornea, corneal grafts usually retain some scleral tissue to allow further processing of the cornea before the corneal transplant surgery. For example, the corneal graft is fixed in an artificial anterior chamber to perform partial lamellar separation, and a corneal endothelial graft is made using a femtosecond laser or a corneal lamellar knife. Furthermore, the corneal graft can also be trepanned to create a cornea of ​​the appropriate lesion size.

[0003] The existing method of obtaining corneal grafts from donors is usually to use corneal scissors to cut around the cornea. Specifically, the doctor needs to use corneal scissors to circle the cornea while pulling the edge of the cornea and cutting the sclera, so as to obtain corneal tissue with part of the sclera. However, there are often some disadvantages in using corneal scissors to obtain corneal grafts. First, because the edge of the cornea needs to be pulled when cutting the cornea, it is easy to cause squeezing damage to the corneal endothelial cells; secondly, due to the limitations of experience, different doctors often obtain corneal grafts containing too little or too much sclera tissue when cutting the cornea. If there is too little sclera tissue, it is difficult to process the corneal graft to meet the requirements of the corneal transplant surgery. If there is too much sclera tissue, the number of corneal endothelial cells cannot be measured due to the limitations of the detection equipment, resulting in the cornea being unable to be accurately evaluated. In addition, the prior art also discloses a negative pressure suction corneal trephine, which is used to drill and remove the corneal lesion area of ​​patients with corneal diseases (i.e., recipients) in order to transplant a healthy cornea. The negative pressure suction corneal trephine includes a negative pressure suction corneal pillow seat (hereinafter referred to as the pillow seat) and a drill. The pillow seat has a space for the drill to pass through. After the pillow seat is fixed to the corneal lesion area of ​​the recipient by negative pressure suction, the drill is passed through the pillow seat and drills the corneal lesion area in a manner of rotating relative to the pillow seat to remove the corneal lesion area.

[0004] However, there are significant differences between harvesting a corneal graft from a donor and drilling a corneal lesion from a recipient. First, harvesting a corneal graft from a donor requires carving the sclera, while drilling a corneal lesion from a recipient requires carving the cornea. Second, because the area of ​​a corneal graft is often larger than the area of ​​a corneal lesion, if a conventional negative pressure corneal trephine is used to harvest a corneal graft from the donor's eye by passing the drill through the occipital seat and rotating it relative to the occipital seat, the occipital seat needs to be designed to be relatively large to cover the range of the corneal graft. Since the angle of eyelid opening is generally limited, if the occipital seat is too large, it may be difficult to fix the occipital seat to the eyeball due to the restriction or obstruction of the eyelid. Therefore, the conventional negative pressure corneal trephine is not suitable for harvesting corneal grafts from donors. Summary of the Invention

[0005] The present invention is proposed in view of the above-mentioned situation, and its purpose is to provide a negative pressure suction trephine device for cornea acquisition for eye bank, which is suitable for obtaining corneal grafts with uniform scleral tissue from donors in a rotary cutting manner, and can effectively reduce the squeezing damage to corneal endothelial cells.

[0006] To this end, the utility model provides a cornea acquisition negative pressure suction ring drill device for an eye bank, which is a device for obtaining corneal grafts from a donor's eyeball, comprising: a suction ring for positioning on the eyeball above the cornea, and a ring drill that is sleeved on the outer circumference of the suction ring and can rotate relative to the suction ring, the end face of the suction ring is formed with an annular suction surface that can be adsorbed to the eyeball by negative pressure suction, the ring drill includes a circular ring component, and a circular cutting portion formed at the distal end of the circular ring component for circumcising the sclera, the circular ring component is sleeved on the outer circumference of one end of the suction ring close to the annular suction surface.

[0007] In the present invention, the adsorption ring can be fixed to a designated position of the eyeball by being adsorbed to the eyeball by the annular adsorption surface under the action of negative pressure. Since the circular ring component of the trephine is sleeved on the outer periphery of the adsorption ring near one end of the annular adsorption surface, the circular ring component can be rotated on the outer periphery of the adsorption ring to use the circular cutting portion to perform an annular cut on the sclera to obtain a corneal graft. Compared to the method of using a trephine to pass through the inner diameter of the adsorption ring to perform an annular cut on the sclera to obtain a corneal graft, the size of the adsorption ring can be reduced, thereby reducing the possibility of the eyelid restricting or hindering the adsorption ring from being fixed to the eyeball. In addition, since the circular cutting portion of the trephine rotates to perform an annular cut on the sclera to obtain a corneal graft, it is beneficial for the corneal graft to have uniform scleral tissue and can effectively reduce the extrusion damage to the corneal endothelial cells.

[0008] In addition, in the negative pressure suction trephine device for cornea acquisition used in an eye bank according to the present invention, optionally, the adsorption ring includes an observation channel extending along the axial direction of the adsorption ring, and a reference portion provided in the observation channel for assisting in positioning the adsorption ring on the eyeball. In this case, when the adsorption ring is positioned on the eyeball, it is convenient to observe or inspect the cornea through the observation channel to confirm whether the adsorption ring is located at the designated position on the eyeball. In addition, the auxiliary alignment function of the reference portion can improve the convenience of positioning the adsorption ring at the designated position of the eyeball, which is conducive to improving the accuracy of positioning the adsorption ring at the designated position of the eyeball.

[0009] In addition, in the eye bank cornea acquisition negative pressure suction trephine device of the present invention, the reference portion may optionally include a first rod and a second rod disposed orthogonally to each other. This facilitates using the intersection of the first and second rods as a reference point to assist in positioning the suction ring at a desired location on the eyeball.

[0010] In addition, in the cornea acquisition negative pressure suction ring drill device for eye banks involved in the present invention, optionally, the adsorption ring includes an inner ring and an outer ring that is sleeved on the outer circumference of the inner ring and is higher than the inner ring, and an annular negative pressure cavity with an open end and a closed end is formed between the inner ring and the outer ring, and the annular adsorption surface is formed at the open end. In this case, since the annular adsorption surface is formed at the open end of the annular negative pressure cavity, a negative pressure suction effect can be easily generated through the annular negative pressure cavity so that the annular adsorption surface is adsorbed on the eyeball. In addition, since the outer ring is higher than the inner ring, when the annular adsorption surface is formed at the open end of the annular negative pressure cavity, it is easy to make the curvature of the annular adsorption surface match the curvature of the sclera.

[0011] In addition, in the cornea acquisition negative pressure suction ring drill device for eye banks involved in the present invention, optionally, the inner ring and the outer ring are connected at the open end by a plurality of ribs, and the plurality of ribs are arc-shaped so that the inner ring and the outer ring form a circular arc transition at the open end, and the plurality of ribs and the open end form the annular adsorption surface. In this case, the connection strength between the inner ring and the outer ring can be enhanced by the plurality of ribs. In addition, since the annular adsorption surface is formed by the plurality of ribs and the open end, by forming a circular arc transition between the inner ring, the ribs and the outer ring at the open end, it is beneficial to match the curvature of the annular adsorption surface with the curvature of the sclera. In addition, since the ribs are arc-shaped, when the ribs contact the cornea, it can prevent the ribs from scratching the cornea and / or sclera.

[0012] In addition, in the eye bank cornea acquisition negative pressure suction trephine device of the present invention, the number of ribs can be four, and the four ribs are evenly distributed at the opening end of the annular negative pressure chamber. Thus, by applying a marking liquid to the four ribs, the four directions of the cornea (superior, inferior, nasal, and temporal) can be marked.

[0013] In addition, in the eye bank cornea acquisition negative pressure suction trephine device of the present invention, optionally, both ends of the first rod and the second rod are respectively connected to the suction ring, and the positions of the four ribs correspond to the four connections between the first rod and the second rod and the suction ring. In this case, the positions of the four ribs can be visually confirmed based on the four connections between the first rod and the second rod and the suction ring. When the suction ring is positioned on the eyeball, the posture of the suction ring can be adjusted so that the four connections correspond to the four upper, lower, left, and right positions of the sclera, thereby facilitating confirmation that the four ribs correspond to the four upper, lower, left, and right positions of the sclera.

[0014] In addition, the eye bank cornea acquisition negative pressure suction trephine device of the present invention may optionally further include a negative pressure generating device in fluid communication with the annular negative pressure chamber to generate a negative pressure suction effect in the annular negative pressure chamber. Thus, the negative pressure generating device can generate a negative pressure suction effect in the annular negative pressure chamber, thereby causing the annular suction surface to be attracted to the eyeball under the negative pressure suction effect.

[0015] In addition, in the eye bank cornea acquisition negative pressure suction trephine device of the present invention, the trephine can optionally be threadedly mounted on the outer circumference of the adsorption ring. In this case, because the trephine and the adsorption ring are threadedly connected, when the trephine rotates relative to the adsorption ring to trephinate the sclera, the depth of the sclera trephine trephine can be accurately controlled (for example, one rotation of the trephine corresponds to a first trephination depth, half a rotation corresponds to a second trephination depth, etc.).

[0016] In addition, in the eye bank cornea acquisition negative pressure suction trephine device of the present invention, the suction ring optionally includes two protruding members formed on the outer ring at an end distal from the annular suction surface, the protruding members being arranged opposite each other. This facilitates operation of the suction ring by gripping the two protruding members with the fingers of a single hand.

[0017] According to the utility model, a negative pressure suction trephine device for cornea acquisition for an eye bank can be provided. The negative pressure suction trephine device for cornea acquisition for an eye bank is suitable for obtaining corneal grafts with uniform scleral tissue from a donor in a rotary cutting manner, and can effectively reduce the squeezing damage to corneal endothelial cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will now be explained in further detail, by way of example only, with reference to the accompanying drawings.

[0019] Figure 1 It is a schematic diagram showing the overall structure of the ring drilling device involved in the example of the present utility model.

[0020] Figure 2 1 is a schematic diagram showing a first perspective of the adsorption ring involved in the example of the present utility model.

[0021] Figure 3 2 is a schematic diagram showing the adsorption ring involved in the example of the present utility model from a second perspective.

[0022] Figure 4 2 is a schematic diagram showing the overall structure of the trephine drill involved in the example of the present utility model.

[0023] Figure 5 2 is a cross-sectional view showing a suction ring according to an example of the present invention.

[0024] Figure 6 Schematic diagram showing an adsorption ring and a negative pressure generating device according to an example of the present invention.

[0025] Description of reference numerals:

[0026] 1…trephine device, 10…adsorption ring, 12…annular adsorption surface, 14…observation channel, 140…reference portion, 142…first rod, 144…second rod, 122…inner ring, 124…outer ring, 120…annular negative pressure chamber, 16…rib, 18…protruding component, 180…fingerholding portion, 182…connecting portion, 20…trephine, 22…circular ring component, 24…circular cutting portion, 26…arm, 30…negative pressure generating device, 32…syringe, 34…push rod, 36…spring, 37…pneumatic switch, 38…air guide tube. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] It should be noted that the terms "first", "second", "third" and "fourth" in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices. In the following description, the same symbols are given to the same components, and repeated descriptions are omitted. In addition, the drawings are only schematic diagrams, and the ratio of the sizes of the components to each other or the shapes of the components may be different from the actual ones.

[0029] The utility model relates to a negative pressure suction trephine device for cornea acquisition used in an eye bank. The negative pressure suction trephine device is suitable for obtaining corneal grafts with uniform scleral tissue from a donor in a rotary cutting manner, and can effectively reduce the squeezing damage to corneal endothelial cells.

[0030] The eye bank cornea harvesting negative pressure aspiration trephine device of the present invention can be used to harvest corneal grafts from a donor's eyeball. Furthermore, the eye bank cornea harvesting negative pressure aspiration trephine device can also be simply referred to as a trephine device, or sometimes as a trepanation device or a rotary cutting device.

[0031] In some examples, in the field of corneal transplantation, an eye bank may refer to an institution that specializes in storing and managing corneal grafts used in corneal transplantation surgery. In some examples, corneal harvesting may refer to harvesting corneal grafts from a donor's eye. Alternatively, a donor may refer to a deceased individual who donates their corneas.

[0032] In some examples, the trephine device of the present invention can be used in an eye bank to obtain a corneal graft from a donor's eye. In some examples, the corneal graft can include cornea and sclera tissue (also referred to as sclera). The sclera tissue can surround the periphery of the cornea.

[0033] Figure 1 1 is a schematic diagram showing the overall structure of the trephine device 1 involved in the example of the present utility model. Figure 2 1 is a schematic diagram showing a first perspective of the adsorption ring 10 according to an example of the present invention. Figure 3 1 is a schematic diagram showing a second perspective of the adsorption ring 10 according to an example of the present invention.

[0034] For some examples, see Figure 1The trephine device 1 may include an adsorption ring 10, which may be used to position the eyeball above the cornea. In some examples, the adsorption ring 10 located above the cornea may be positioned on the eyeball by abutting against and adsorbing on the sclera under the action of negative pressure suction. In addition, positioning the adsorption ring 10 on the eyeball may mean that the adsorption ring 10 is fixed to a designated position on the eyeball and the two remain relatively stationary. In some examples, positioning the adsorption ring 10 on the eyeball may define an area on the eyeball where the sclera is rotated and cut.

[0035] For some examples, see Figures 2 to 3 The end surface of the suction ring 10 may be formed with an annular suction surface 12, which can be attached to the eyeball through negative pressure suction. In some examples, the annular suction surface 12 can be attached to the sclera through negative pressure suction to secure the suction ring 10 to the eyeball. In this case, the negative pressure suction effect of the annular suction surface 12 can facilitate the positioning of the suction ring 10 on the eyeball, thereby defining the area of ​​the rotational incision of the sclera.

[0036] In addition, in some examples, the annular adsorption surface 12 can also be adsorbed on the cornea by negative pressure suction to fix the adsorption ring 10 on the eyeball.

[0037] In some examples, the curvature of the annular adsorption surface 12 can match the curvature of the sclera. For example, the curvature of the annular adsorption surface 12 can be the same as or similar to the curvature of the sclera. This allows the annular adsorption surface 12 to form a good fit with the sclera, thereby improving the stability of the annular adsorption surface 12 adhering to the sclera.

[0038] Figure 4 1 is a schematic diagram showing the overall structure of the trephine 20 involved in the example of the present utility model.

[0039] For some examples, see Figure 1 The trephine device 1 may include a trephine 20, which may be used to trephine (i.e., rotate and cut) the sclera. In some examples, after the adsorption ring 10 is positioned on the eyeball, the trephine 20 may cooperate with the adsorption ring 10 to trephine the sclera.

[0040] For some examples, see Figure 1 The trephine 20 can be sleeved on the outer circumference of the adsorption ring 10, and the trephine 20 can rotate relative to the adsorption ring 10. That is, the trephine 20 sleeved on the outer circumference of the adsorption ring 10 can rotate along the circumferential direction of the adsorption ring 10.

[0041] For some examples, see Figure 1 or Figure 4The trephine drill 20 may include a circular ring component 22 and a circular cutting portion 24. The circular cutting portion 24 may be formed at a distal end of the circular ring component 22, and the circular cutting portion 24 may be used to circumcise the sclera.

[0042] For some examples, see Figure 1 The circular ring component 22 can be mounted on the outer circumference of one end of the suction ring 10 near the annular suction surface 12. In this case, after the suction ring 10 is fixed to the designated position of the eyeball by being sucked onto the eyeball by the annular suction surface 12, the circular ring component 22 can be rotated on the outer circumference of the suction ring 10 to perform circumcision on the sclera using the circular cutting portion 24 to obtain a corneal graft. Compared to the method of piercing the inner diameter of the suction ring 10 to perform circumcision on the sclera to obtain a corneal graft, the size of the suction ring 10 can be reduced, thereby reducing the possibility of the eyelid restricting or obstructing the fixation of the suction ring 10 to the eyeball.

[0043] In some examples, after the annular member 22 is placed on the suction ring 10, the proximal end of the annular member 22 can be away from the annular suction surface 12, and the distal end can be close to (or facing) the annular suction surface 12. In this case, after the suction ring 10 is positioned on the eyeball, the distal end of the annular member 22 is close to the annular suction surface 12, so that the circular cutting portion 24 faces the sclera of the eyeball. By rotating the annular member 22 relative to the suction ring 10, the circular cutting portion 24 can be used to cut the sclera in an annular manner to obtain a corneal graft.

[0044] In the present invention, since the circular cutting portion 24 of the trephine 20 circumscribes the sclera in a rotational manner to obtain a corneal graft, it is beneficial for the corneal graft to have uniform scleral tissue and can effectively reduce the squeezing damage to the corneal endothelial cells.

[0045] For some examples, see Figure 2 or Figure 3 The suction ring 10 may include an observation channel 14, which can be used to observe or examine the cornea while the suction ring 10 is positioned on the eyeball. In some examples, the observation channel 14 can extend along the axial direction of the suction ring 10. In other words, the observation channel 14 can pass through the suction ring 10 along the axial direction.

[0046] In some examples, while the adhesive ring 10 is being positioned on the eyeball, the cornea can be observed or inspected through the observation channel 14 to confirm whether the adhesive ring 10 is located at a designated position on the eyeball. Alternatively, the designated position can be determined by the requirements for corneal implant acquisition. Furthermore, positioning the adhesive ring 10 on the eyeball can mean adjusting the position and / or posture of the adhesive ring 10 relative to the eyeball.

[0047] For some examples, see Figure 2 or Figure 3The suction ring 10 may include a reference portion 140, which may be used to assist in positioning the suction ring 10 on the eyeball. In some examples, the reference portion 140 may be disposed in the observation channel 14. In some examples, the reference portion 140 may be disposed in the center of the observation channel 14.

[0048] In some examples, the reference portion 140 can be used to align the center of the cornea when positioning the suction ring 10 on the eyeball. In some examples, confirming whether the suction ring 10 is located at the designated position on the eyeball can include confirming whether the reference portion 140 is aligned with the center of the cornea.

[0049] Specifically, when the suction ring 10 is positioned on the eyeball, the reference portion 140 is aligned with the center of the cornea to confirm that the suction ring 10 is located at the designated position on the eyeball (at this time, the suction ring 10 does not need to be in contact with the eyeball). Further, after confirming that the suction ring 10 is located at the designated position on the eyeball, the suction ring 10 can be adsorbed to the eyeball under the action of negative pressure suction, thereby completing the positioning of the suction ring 10 on the eyeball. In this case, the auxiliary alignment function of the reference portion 140 can improve the convenience of positioning the suction ring 10 at the designated position of the eyeball, which is conducive to improving the accuracy of positioning the suction ring 10 at the designated position of the eyeball.

[0050] For some examples, see Figure 2 or Figure 3 The reference portion 140 may include a first rod 142 and a second rod 144. In some examples, the first rod 142 and the second rod 144 may be arranged orthogonally to each other. Thus, it is convenient to use the intersection of the first rod 142 and the second rod 144 as a reference point to assist in positioning the suction ring 10 at a designated position of the eyeball. In some examples, the intersection of the first rod 142 and the second rod 144 orthogonally may be located at the center of the observation channel 14 (see Figure 3 ).

[0051] In some examples, the trephine 20 can be threadedly mounted on the outer circumference of the adsorption ring 10. In this case, since the trephine 20 is threadedly connected to the adsorption ring 10, when the trephine 20 is rotated relative to the adsorption ring 10 to perform sclera cutting, the depth of the sclera cut by the trephine 20 can be accurately controlled (for example, one rotation of the trephine 20 corresponds to a first cutting depth, half a rotation corresponds to a second cutting depth, etc.).

[0052] In some examples, the annular component 22 of the trephine 20 can be sleeved on the outer periphery of the end of the adsorption ring 10 close to the annular adsorption surface 12 by threaded connection. For example, the annular component 22 can have an internal thread (see Figure 4 ), the end of the adsorption ring 10 close to the annular adsorption surface 12 may have an external thread (see Figure 2), the annular component 22 can be mounted on the adsorption ring 10 by engaging the internal thread with the external thread and can rotate relative to the adsorption ring 10.

[0053] Figure 5 1 is a cross-sectional view showing a suction ring 10 according to an example of the present invention.

[0054] For some examples, see Figure 2 or Figure 3 The adsorption ring 10 includes an inner ring 122 and an outer ring 124 , and the outer ring 124 can be sleeved on the outer circumference of the inner ring 122 .

[0055] In some examples, the outer ring 124 can be higher than the inner ring 122. Specifically, when the outer ring 124 is sleeved on the outer periphery of the inner ring 122, the two ends of the outer ring 124 can respectively cover the two ends of the inner ring 122 so that the inner ring 122 is not exposed (see Figure 5 In this case, since the outer ring 124 is higher than the inner ring 122, when the annular adsorption surface 12 is formed at the opening end of the annular negative pressure cavity 120, it is easy to make the curvature of the annular adsorption surface 12 match the curvature of the sclera.

[0056] For some examples, see Figure 5 An annular negative pressure chamber 120 may be formed between the inner ring 122 and the outer ring 124. The annular negative pressure chamber 120 may have an open end and a closed end. That is, one end of the annular negative pressure chamber 120 may be open and the other end may be closed.

[0057] For some examples, see Figure 5 , the annular suction surface 12 can be formed at the open end of the annular negative pressure chamber 120. In other words, the annular suction surface 12 can be formed by the open end of the annular negative pressure chamber 120. In this case, since the annular suction surface 12 is formed at the open end of the annular negative pressure chamber 120, it is easy to generate a negative pressure suction effect through the annular negative pressure chamber 120 to make the annular suction surface 12 adhere to the eyeball.

[0058] In some examples, the inner ring 122 and the outer ring 124 can have various size combinations, so that the annular suction surface 12 has various sizes. The annular suction surfaces 12 of various sizes can be correspondingly attached to eyeballs of different sizes. This allows the negative pressure suction trephine 20 to be suitable for cutting corneal grafts of different sizes.

[0059] For some examples, see Figure 2 or Figure 3 The inner ring 122 and the outer ring 124 may be connected by a plurality of ribs 16. In some examples, the inner ring 122 and the outer ring 124 may be connected at the open end by a plurality of ribs 16. Thus, the connection strength between the inner ring 122 and the outer ring 124 can be enhanced.

[0060] In some examples, the plurality of ribs 16 and the open end may form an annular suction surface 12 (see Figure 3 In this case, when the annular adsorption surface 12 is adsorbed on the eyeball under the action of negative pressure suction, the ribs 16 and the marking liquid can be used to mark the sclera to confirm the position of the cornea.

[0061] In some examples, the multiple ribs 16 may be curved, so that the inner ring 122 and the outer ring 124 form a circular transition at the open end. In this case, since the annular suction surface 12 is formed by the multiple ribs 16 and the open end, the circular transition between the inner ring 122, the ribs 16, and the outer ring 124 at the open end facilitates matching the curvature of the annular suction surface 12 with the curvature of the sclera. Furthermore, the curved shape of the ribs 16 prevents the ribs 16 from scratching the cornea and / or sclera when they contact the cornea and / or sclera.

[0062] In some examples, the ribs 16 can contact the sclera after the adsorption ring 10 is positioned on the eyeball. In some examples, the ribs 16 can be combined with a marking liquid to mark the sclera after the adsorption ring 10 is positioned on the eyeball.

[0063] Specifically, a marking liquid (e.g., gentian violet solution) can be first applied to the plurality of ribs 16. When the adsorption ring 10 is positioned on the eyeball, the plurality of ribs 16 may not contact the eyeball. After the adsorption ring 10 is positioned on the eyeball, the plurality of ribs 16 may contact the sclera. The trephine 20 is then rotated along the circumference of the adsorption ring 10 to evenly cut the sclera. After the cutting is completed, the adsorption ring 10 can be removed from the eyeball. Since the trephine 20 is located on the periphery of the adsorption ring 10 (i.e., the periphery of the plurality of ribs 16), the plurality of ribs 16 can complete the marking of the four directions of the sclera after the adsorption ring 10 is removed, thereby confirming the orientation of the cornea (e.g., the orientation of the upper and lower nasal and temporal sides of the cornea). This can assist corneal transplant doctors in accurately determining the orientation of the corneal graft, thereby facilitating subsequent further processing of the corneal graft.

[0064] For some examples, see Figure 3 The number of the ribs 16 can be four, and the four ribs 16 can be evenly distributed at the opening end of the annular negative pressure chamber 120. Thus, by coating the marking liquid on the four ribs 16, the four directions of the sclera (up, down, left, and right) can be marked.

[0065] In some examples, the width of one of the four ribs 16 may be greater than the widths of the remaining ribs 16. For example, the width of the rib 16 used to mark the upper part of the sclera may be greater than the widths of the remaining ribs 16, so that the marking of the upper part of the sclera is distinguishable from other parts.

[0066] For some examples, see Figure 3 The first rod 142 and the second rod 144 of the reference portion 140 may be connected to the adsorption ring 10 at both ends. For example, the first rod 142 and the second rod 144 may be connected to the inner ring 122 of the adsorption ring 10 at both ends, thereby forming four connections (i.e., joints) on the inner ring 122.

[0067] For some examples, see Figure 3 The positions of the four ribs 16 can correspond to the four connection points between the first rod 142 and the second rod 144 and the suction ring 10. In this case, the positions of the four ribs 16 can be visually confirmed based on the four connection points between the first rod 142 and the second rod 144 and the suction ring 10. When the suction ring 10 is positioned on the eyeball, the posture of the suction ring 10 can be adjusted so that the four connection points correspond to the four upper, lower, left, and right positions of the sclera, thereby facilitating confirmation that the four ribs 16 correspond to the four upper, lower, left, and right positions of the sclera.

[0068] In some examples, confirming that the suction ring 10 is positioned at the designated location on the eyeball can include confirming that the reference portion 140 is aligned with the center of the cornea and that the four ribs 16 correspond to the four upper, lower, left, and right positions of the sclera. In other words, when the suction ring 10 is positioned on the eyeball, the position of the suction ring 10 on the designated location on the eyeball can be confirmed by aligning the reference portion 140 with the center of the cornea and the four ribs 16 corresponding to the four upper, lower, left, and right positions of the sclera.

[0069] For some examples, see Figure 2 The suction ring 10 may include a protruding part 18, which may be formed at an end of the outer ring 124 away from the annular suction surface 12. In some examples, when the suction ring 10 is positioned on the eyeball, the protruding part 18 can be clamped or held by one hand to adjust the position and / or posture of the suction ring 10 relative to the eyeball.

[0070] In some examples, there may be two protruding parts 18, and the two protruding parts 18 may be arranged opposite to each other. Thus, it is convenient to adjust the position and / or posture of the suction ring 10 relative to the eyeball by pinching the two protruding parts 18 with the fingers of one hand.

[0071] For some examples, see Figure 2 or Figure 3 The protruding component 18 may include a finger-holding portion 180 and a connecting portion 182 . The finger-holding portion 180 may be in contact with a finger, and the connecting portion 182 may be used to connect the finger-holding portion 180 and the outer ring 124 .

[0072] For some examples, see Figure 2The finger grip portion 180 can be bent in a direction away from the outer ring 124. In this case, the direction of the finger grip portion 180 bending can correspond to the direction of the finger gripping force, thereby improving the firmness of the fingers gripping the two protruding components 18 with one hand. In some examples, the side of the finger grip portion 180 facing away from the outer ring 124 can have anti-slip stripes.

[0073] For some examples, see Figure 4 The trephine 20 may include a plurality of arms 26, which may be disposed on the outer periphery of the annular member 22. In some examples, the trephine 20 may be rotated relative to the suction ring 10 by pushing the plurality of arms 26. This facilitates the rotation of the trephine 20 by the fingers of one hand via the plurality of arms 26.

[0074] For some examples, see Figure 4 The number of arms 26 can be four, and the four arms 26 can be evenly arranged on the outer periphery of the annular component 22 around the central axis of the trephine 20.

[0075] Figure 6 Schematic diagram showing a suction ring 10 and a negative pressure generating device 30 according to an example of the present invention.

[0076] For some examples, see Figure 1 or Figure 6 The trephine device 1 may further include a negative pressure generating device 30 , which may generate a pressure lower than the surrounding environment by extracting air or gas.

[0077] For some examples, see Figure 6 , the negative pressure generating device 30 can be in fluid communication with the annular negative pressure chamber 120. In some examples, the negative pressure generating device 30 can be in fluid communication with the annular negative pressure chamber 120 so that the annular negative pressure chamber 120 generates a negative pressure suction effect.

[0078] For some examples, see Figure 6 The negative pressure generating device 30 can be in fluid communication with the annular negative pressure chamber 120 via the pneumatic switch 37 and the air guide tube 38. The pneumatic switch 37 can be used to control the opening and closing of the fluid communication between the negative pressure generating device 30 and the annular negative pressure chamber 120.

[0079] For some examples, see Figure 6 The negative pressure generating device 30 may include a syringe 32, a push rod 34, and a spring 36. The spring 36 may be sleeved on the outer periphery of the push rod 34, and the push rod 34 may be placed in the syringe 32, while the spring 36 may not be placed in the syringe 32 ( Figure 6 The spring 36 is schematically shown outside the barrel 32 and in a compressed state.

[0080] Now, the process of generating negative pressure suction by the annular negative pressure chamber 120 will be described in conjunction with the working principle of the negative pressure generating device 30 .

[0081] First, the pneumatic switch 37 can be turned on and the push rod 34 in the syringe 32 can be pushed to the bottom to expel the air in the syringe 32 and compress the spring 36 so that the spring 36 accumulates elastic potential energy; secondly, the pneumatic switch 37 can be turned off to use the atmospheric pressure outside the syringe 32 to keep the spring 36 in a compressed state; then, the position and / or posture of the adsorption ring 10 relative to the eyeball can be adjusted so that the adsorption ring 10 is located at a specified position on the eyeball; finally, the pneumatic switch 37 can be turned on to put the annular negative pressure chamber 120, the air guide tube 38 and the syringe 32 in a conducting state. At this time, the spring 36 can release the elastic potential energy (that is, the spring 36 rebounds) to generate an elastic force on the push rod 34. The push rod 34 moves toward the outside of the syringe 32 under the action of the elastic force, so that the negative pressure generating device 30 can extract the air inside the annular negative pressure chamber 120 to make the annular negative pressure chamber 120 generate a negative pressure suction effect.

[0082] In some examples, when the adsorption ring 10 is located at a designated position on the eyeball, the annular adsorption surface 12 is adsorbed on the eyeball under the action of negative pressure to fix the adsorption ring 10 on the eyeball, thereby completing the positioning of the adsorption ring 10 on the eyeball.

[0083] In the present invention, the adsorption ring 10 can be fixed to a designated position on the eyeball by being adsorbed to the eyeball by the annular adsorption surface 12 under the action of negative pressure. Since the annular component 22 of the trephine 20 is sleeved on the outer periphery of the adsorption ring 10 near one end of the annular adsorption surface 12, the annular component 22 can be rotated on the outer periphery of the adsorption ring 10 to perform an annular cut on the sclera using the circular cutting portion 24 to obtain a corneal graft. Compared to the trephine 20 passing through the inner diameter of the adsorption ring 10 to perform an annular cut on the sclera to obtain a corneal graft, the size of the adsorption ring 10 can be reduced, thereby reducing the possibility of the eyelid restricting or obstructing the adsorption ring 10 from being fixed to the eyeball. In addition, since the circular cutting portion 24 of the trephine 20 rotates to perform an annular cut on the sclera to obtain a corneal graft, it is beneficial for the corneal graft to have uniform scleral tissue and can effectively reduce compression damage to the corneal endothelial cells.

[0084] Although the present invention has been described in detail above with reference to the accompanying drawings and examples, it should be understood that the above description does not limit the present invention in any form. Those skilled in the art may modify and alter the present invention as needed without departing from the spirit and scope of the present invention, and such modifications and alterations are intended to fall within the scope of the present invention.

Claims

1. A negative pressure suction trephine device for corneal harvesting from an eye bank, which is a device for harvesting corneal grafts from a donor's eyeball, characterized in that: include : a suction ring for positioning on the eyeball above the cornea, and a trephine provided on the outer periphery of the suction ring and rotatable relative to the suction ring, The end surface of the adsorption ring is formed with an annular adsorption surface that can be adsorbed on the eyeball by negative pressure suction. The trephine comprises a circular ring component and a circular cutting portion formed at the distal end of the circular ring component for circumcising the sclera. The circular ring component is sleeved on the outer periphery of one end of the adsorption ring close to the annular adsorption surface.

2. The negative pressure suction trephine device for cornea acquisition for eye bank according to claim 1, characterized in that: The adsorption ring includes an observation channel extending along the axial direction of the adsorption ring, and a reference portion provided in the observation channel for assisting in positioning the adsorption ring on the eyeball.

3. The negative pressure suction trephine device for cornea acquisition for eye bank according to claim 2, characterized in that: The reference portion includes a first rod and a second rod that are arranged orthogonally to each other.

4. The negative pressure suction trephine device for cornea acquisition for eye bank according to claim 3, characterized in that: The adsorption ring includes an inner ring and an outer ring which is sleeved on the outer circumference of the inner ring and higher than the inner ring. An annular negative pressure cavity with an open end and a closed end is formed between the inner ring and the outer ring, and the annular adsorption surface is formed at the open end.

5. The negative pressure suction trephine device for cornea acquisition for eye bank according to claim 4, characterized in that: The inner ring and the outer ring are connected at the open end by a plurality of ribs. The plurality of ribs are arc-shaped so that the inner ring and the outer ring form an arc transition at the open end. The plurality of ribs and the open end form the annular adsorption surface.

6. The negative pressure suction trephine device for cornea acquisition for eye bank according to claim 5, characterized in that: The number of the ribs is four, and the four ribs are evenly distributed at the opening end of the annular negative pressure cavity.

7. The negative pressure suction trephine device for cornea acquisition for eye bank according to claim 6, characterized in that: Both ends of the first rod and the second rod are connected to the adsorption ring respectively, and the positions of the four ribs correspond to the four connection points between the first rod and the second rod and the adsorption ring respectively.

8. The negative pressure suction trephine device for cornea acquisition for eye bank according to claim 4, characterized in that: It also includes a negative pressure generating device which is in fluid communication with the annular negative pressure chamber so that the annular negative pressure chamber generates a negative pressure suction effect.

9. The negative pressure suction trephine device for cornea acquisition for eye bank according to claim 1, characterized in that: The trephine is sleeved on the outer circumference of the adsorption ring through a threaded connection.

10. The negative pressure suction trephine device for cornea acquisition for eye bank according to claim 4, characterized in that: The adsorption ring includes a protruding component formed on the outer ring at an end away from the annular adsorption surface. The number of the protruding components is two, and the two protruding components are arranged opposite to each other.

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