Rotary fixing tweezers for assembling artificial cornea and using method of rotary fixing tweezers

Abstract

The invention discloses rotary fixing tweezers for assembling an artificial cornea and a using method of the rotary fixing tweezers, and belongs to the technical field of medical precision instruments. When the lens column of the artificial cornea and the support are assembled, the rotary fixing tweezers are used for clamping the lens column. When the cylinder is rotated, force is transmitted to the tweezers body through the spring, the tweezers body is driven to rotate, meanwhile, the length of the spring changes, and meanwhile the size of the force borne by the spring is visually displayed through scales. The rotary fixing tweezers for assembling the artificial cornea have the functions of clamping the lens column and rotating the lens column.

Description

Technical Field

[0001] This invention belongs to the field of medical precision instrument technology, and particularly relates to a rotating fixation forceps for artificial corneal assembly and its usage method. Background Technology

[0002] Currently, artificial corneal transplantation is one of the main treatments for corneal blindness, and the precise holding and rotation of the artificial cornea (especially the lens shaft) during the procedure is crucial. In traditional surgery, surgeons typically use ordinary microforceps or specialized fixing forceps to hold the artificial corneal lens shaft. Clinical experience has revealed the following significant problems with these tools: Insufficient clamping stability: Traditional forceps often have flat or simple groove designs for clamping, resulting in poor matching with the curved surface of the artificial corneal lens column, making slippage or displacement prone to occur during surgery. According to clinical statistics, approximately 15% of surgeries experience lens column positioning deviation due to unstable clamping, requiring secondary adjustments, prolonging the operation time, and increasing the risk of trauma to the patient.

[0003] Lacking rotation capability, artificial corneal implantation often requires adjusting the column angle to match the patient's corneal curvature, or rotating the column to create relative displacement between the column and the stent, allowing the stent to conform to the cornea. However, current forceps require the surgeon to manually rotate the handle to complete the operation. Due to the limited surgical field (usually only 2-3mm of operating space), rotational precision is difficult to control, easily leading to excessive rotation of the column (errors can reach ±5°) or damage to surrounding tissues.

[0004] Material and mechanical design flaws exist. Most existing forceps are made of stainless steel, which can easily leave indentations on the surface of the endoscope column when the clamping force is too high (experimental data shows that pressure exceeding 0.5N can cause microcracks in the polymethyl methacrylate endoscope column). Furthermore, insufficient rigidity of the forceps arms can lead to vibration during clamping, affecting surgical precision.

[0005] The procedure is highly complex, requiring doctors to simultaneously control clamping force, position, and rotation, demanding a high level of experience from the operator. Studies have shown that novice doctors take an average of 40% longer to complete endoscopic column localization than experienced doctors, and their complication rate is three times higher.

[0006] Therefore, there is an urgent need to propose a rotating fixation forceps for artificial corneal assembly and its usage method to solve the problems of insufficient clamping stability, lack of rotation function, material and mechanical design defects, and high operation complexity of existing fixation forceps. Summary of the Invention

[0007] The purpose of this invention is to provide a rotating fixation forceps for artificial corneal assembly that has sufficient clamping stability, combines fastening and rotation functions, prevents pressure marks, and is easy to operate, as well as its method of use.

[0008] To achieve the above objectives, the present invention provides the following technical solution: In a first aspect, the present invention provides a rotating fixing forceps for assembling an artificial cornea. When assembling the lens column and the support of the artificial cornea, after the fixing forceps clamp the lens column, the fixing forceps are rotated to reach a preset pre-tightening force, thereby completing the assembly of the lens column and the support.

[0009] As one possible implementation, the rotary fixing forceps includes a barrel, a shaft, a spring, and a forceps body; wherein, the forceps body includes a handle and a clamping part, the handle is connected to the shaft, the spring is sleeved on the shaft and one end of the spring is fastened to one end of the shaft, and the other end of the spring is fastened to the inner wall of the end of the barrel; the shaft and the barrel are rotated relative to each other so that the rotary fixing forceps have a preset preload.

[0010] As one possible implementation, a limiting block is also provided at the outer end of the tail of the cylinder, with one end of the limiting block abutting against the outer end of the tail of the cylinder.

[0011] As one possible implementation, the upper end of the spring is fastened to the inner wall of the upper end of the cylinder, and the lower end of the spring is fastened to a shaft located at the lower end of the cylinder; or, The upper end of the spring is fastened to the shaft located at the upper end of the cylinder, and the lower end of the spring is fastened to the inner wall at the lower end of the cylinder.

[0012] As one possible implementation, an observation window is provided on the wall of the cylinder along its axial direction, and scale lines are evenly arranged on one side of the observation window from top to bottom; before use, the preload corresponding to each scale point on the tail of the spring is calibrated.

[0013] As one possible implementation, the clamping part is either a forward-facing forceps or a reverse-facing forceps.

[0014] As one possible implementation, the part of the clamping section that engages the mirror post is defined as a gripper, consisting of two opposite grippers, which are designed to resemble the structure of a Luoyang shovel.

[0015] As one possible implementation, a buffer pad is provided on the inner side of the gripper, which is detachably and interference-fitted with the gripper. The buffer pad is made of medical-grade silicone, polyurethane, polyvinyl alcohol hydrogel, natural rubber or synthetic rubber. Alternatively, the grippers may be coated with a medical-grade polytetrafluoroethylene (PTFE) coating, which forms an integrated buffer ring.

[0016] As one possible implementation, the clamping part is also provided with a buckle at the position on the gripper, and the buckle is locked after the gripper hugs the mirror column.

[0017] Secondly, the present invention also provides a method for using rotating fixation forceps for artificial corneal assembly, comprising the following steps: Loosen the latch to create space between the jaws to engage the mirror pillar; Press the clamping part to lock the buckle, at which point the jaws grip the mirror pillar tightly; After rotating the fixing tweezers to achieve the preset pre-tightening force, the assembly of the mirror column and bracket is completed.

[0018] Compared with the prior art, the present invention has the following advantages: 1. The rotary fixation forceps for artificial corneal assembly provided by this invention combines the functions of clamping and rotating the lens post. Specifically, it utilizes two grippers with a structure resembling a Luoyang shovel to hold the lens post and then locks it in place with a snap-lock mechanism. During tightening, the cylinder rotates, causing the spring to be stressed. The stressed spring drives the shaft to rotate, which in turn rotates the forceps body, thus assembling the lens post with the support. Simultaneously, the magnitude of the tightening force on the lens post can be visually quantified through the scale on the observation window side, filling the gap in directly quantifying the force applied to the lens post during artificial corneal assembly. This design effectively achieves the tightening requirements, preventing detachment of the artificial cornea due to insufficient tightening, while also avoiding damage to the artificial cornea from excessive force. Compared to the separate and step-by-step clamping and rotating operations provided by existing technologies, the rotary fixation forceps provided by this invention not only reduces the difficulty of operation but also improves operational efficiency, i.e., shortens the surgical time. Clinical trials have shown that the rotary fixation forceps for artificial corneal assembly provided by this invention have a single operation time of no more than 15 seconds.

[0019] 2. The rotary fixation forceps for artificial corneal assembly provided by this invention features a gripper structure resembling a Luoyang shovel, providing a large clamping area and simultaneously employing a locking mechanism for secondary tightening. This utilizes the inherent elasticity of the grippers and the locking force of the locking mechanism to achieve stable clamping of the lens column. This effectively reduces the risk of slippage and displacement during surgery, as well as the risk of loss or damage to the artificial cornea.

[0020] 3. The modular design of the clamping part can accommodate different diameter columns of endoscopes, i.e., different specifications of columns. Quick switching can be achieved by changing the forceps body, covering all clinical needs.

[0021] 4. The grippers can be designed as a constant diameter structure or a non-constant diameter structure to accommodate artificial corneal cylinders of different shapes.

[0022] 5. A removable buffer pad can be provided on the inside of the gripper jaws to better grip the microscope column while preventing damage. Alternatively, the buffer pad can be omitted, making it easier to sterilize the tweezers themselves. Attached Figure Description

[0023] The accompanying drawings, which are provided to further illustrate the invention and constitute a part of this invention, are illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.

[0024] Figure 1A schematic diagram of the overall structure of the rotating fixation forceps for artificial cornea assembly provided in an embodiment of the present invention from a first-view perspective; Figure 2 A schematic diagram of the overall structure of the rotating fixation forceps for artificial cornea assembly provided in an embodiment of the present invention from a second perspective; Figure 3 A schematic diagram of the gripper structure of the rotating fixation forceps for artificial cornea assembly provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the spring position in the rotating fixing forceps for artificial corneal assembly provided in an embodiment of the present invention.

[0025] Figure label: 1-Cylinder, 10-Limiting block, 11-Observation window, 2-Shaft, 3-Spring, 4-Tweezers body, 40-Handle, 41-Clamping part, 410-Claw, 4100-Buffer pad, 5-Snap fastener. Detailed Implementation

[0026] To facilitate a clear description of the technical solutions in the embodiments of the present invention, the terms "first" and "second" are used to distinguish identical or similar items with essentially the same function and effect. For example, the first threshold and the second threshold are merely used to distinguish different thresholds and do not limit their order. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and that the terms "first" and "second" are not necessarily different.

[0027] It should be noted that in this invention, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0028] In this invention, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, a combination of a and b, a combination of a and c, a combination of b and c, or a, b, and c, where a, b, and c can be single or multiple.

[0029] This invention provides a rotating fixation forceps for artificial corneal assembly. During the assembly of the artificial corneal lens column and support structure, the rotating fixation forceps are used to clamp the lens column. When the cylinder is rotated, a spring transmits force to the forceps body, causing the forceps body to rotate. Simultaneously, the length of the spring changes, and the magnitude of the spring force is visually displayed through a scale. The rotating fixation forceps for artificial corneal assembly provided by this invention combines the functions of clamping and rotating the lens column.

[0030] See Figures 1 to 4 The rotating fixing forceps includes a cylinder 1, a shaft 2, a spring 3, and a forceps body 4. The forceps body 4 includes a handle 40 and a clamping part 41. The handle 40 is connected to the shaft 2. The spring 3 is sleeved on the shaft 2, with one end of the spring 3 being tightly connected to one end of the shaft 2 and the other end of the spring 3 being tightly connected to the inner wall of the end of the cylinder 1. The shaft 2 and the cylinder 1 are rotated relative to each other to give the rotating fixing force a preset preload.

[0031] The material of cylinder 1 can be medical-grade titanium alloy.

[0032] The handle 40 may be a columnar handle, which is detachably and securely connected to the clamping part.

[0033] In actual use, the spring 3 is pre-tightened by rotating the cylinder 1 and the tweezers body 4 relative to each other. The spring length, pre-tightening force, and relative displacement between the mirror column and the support are pre-calibrated. The spring length is adjusted in advance according to the above relationship. After the clamping part 41 clamps the mirror column, the pre-tightening force is used to make the relative displacement between the mirror column and the support reach the preset displacement. It has the advantages of simple structure / operation and high precision.

[0034] A limiting block 10 is also provided at the outer end of the tail of the cylinder 1, with one end of the limiting block 10 abutting against the outer end of the tail of the cylinder 1. The limiting block 10 restricts the degree of freedom of axial movement between the cylinder 1 and the handle 40, that is, the cylinder 1 and the handle 40 only have the degree of freedom of rotation and no degree of freedom of axial movement.

[0035] The upper end of spring 3 is fastened to the inner wall of the upper end of cylinder 1, and the lower end of spring 3 is fastened to the shaft located at the lower end of cylinder 1. The upper end of spring 3 is fastened to the inner wall of the upper end of cylinder 1, and the limiting block 10 is set at the outer end of the tail of cylinder 1, which restricts the freedom of axial movement of cylinder 1 by one up and one down. It has the advantages of simple structure, easy implementation and low cost.

[0036] The upper end of the spring 3 is fastened to the shaft 2 located at the upper end of the cylinder 1, and the lower end of the spring 3 is fastened to the inner wall of the lower end of the cylinder 1.

[0037] An observation window 11 is provided on the wall of the cylinder 1 along its axial direction. Scale lines are evenly arranged on one side of the observation window 11 from top to bottom. Before use, the preload corresponding to each scale mark at the tail of the spring, as well as the preload and the distance the mirror column moves, are calibrated.

[0038] For example, the scale values ​​from bottom to top represent the preload force from small to large, with each scale value representing a preload force of 1N. A preload force of 1N represents one rotation of the mirror column.

[0039] The clamping part 41 is either a forward tweezer or a reverse tweezer.

[0040] The clamping part 41 that engages the endoscope column is defined as the gripper 410. Two grippers 410 are arranged opposite each other and have a structure resembling a Luoyang shovel. The two grippers 410, with their Luoyang shovel-like structure, hold the endoscope column together and then lock it in place using the latch 5, thus clamping the endoscope column. A pre-calibrated and adjusted preload force drives the endoscope column to rotate. Compared to existing technologies that require separate tools and steps for clamping and rotating, the rotating fixing forceps provided by this invention not only reduces operational difficulty but also improves operational efficiency, i.e., it shortens surgical time.

[0041] The diameter of the Luoyang shovel-shaped clamp after closing is 2.0-4.0mm.

[0042] The gripper 410 adopts a structure similar to a Luoyang shovel, providing a large clamping area, and simultaneously utilizes the latch 5 for secondary locking. This utilizes the inherent elasticity of the gripper 410 and the locking force of the latch to achieve stable clamping of the endoscope column. This effectively reduces the risk of slippage and displacement during surgery, minimizing patient trauma.

[0043] The gripper 410 has a buffer pad 4100 on its inner side, which is detachably and press-fitted into the gripper. The buffer pad 4100 is made of medical-grade silicone, polyurethane, polyvinyl alcohol hydrogel, natural rubber, or synthetic rubber. The gripper 410 is coated with a medical-grade polytetrafluoroethylene coating, forming an integrated buffer ring. The gripper 410 can have a detachable buffer pad 4100 on its inner side, which not only better grips the endoscope column but also prevents damage to the column. Alternatively, the gripper 410 can be without a buffer pad, making it easier to sterilize the forceps body.

[0044] The rotary fixation forceps for artificial corneal assembly provided by the present invention have a buffer pad on the inner side of the gripper, and the applied pressure is controlled within the range of 0.3-0.5N, reducing the occurrence rate of scratches on the lens column surface from 8% to 0.2%.

[0045] Alternatively, a dual-lobed titanium alloy forceps arm structure can be adopted. The inner side of the forceps arm is equipped with arc-shaped silicone anti-slip textures with a texture spacing of 0.5mm and a depth of 0.2mm, ensuring a contact area of ​​≥85% and a pressure ≤0.3MPa when holding the artificial corneal lens column (diameter 6-8mm). The end of the forceps arm is connected to the main body via a micro-hinge, and the hinge has a built-in torque spring 2 (elastic coefficient 5N·mm / rad) to achieve adaptive clamping force adjustment.

[0046] The inner side of the gripper has an arc-shaped groove that matches the curved surface of the artificial corneal lens column. The surface of the groove is covered with a silicone anti-slip layer (friction coefficient ≥0.8) to ensure gripping stability.

[0047] The clamping part is also equipped with a latch on the gripper jaws. After the gripper jaws engage with the mirror pillar, the latch locks in place. The latch is a metal strip that can interlock.

[0048] The modular design of the clamping part can be adapted to different diameter endoscope columns (6.0-8.5mm), and quick switching can be achieved by changing the buckle components, covering 90% of clinical needs.

[0049] Secondly, the present invention also provides a method for using rotating fixation forceps for artificial corneal assembly, comprising the following steps: The cylinder and tweezers body are rotated relative to each other so that the spring has a preset preload force; Loosen the latch to create space between the jaws to engage the mirror pillar; Press the clamping part to lock the buckle, at which point the jaws grip the mirror pillar tightly; After rotating the fixing tweezers to achieve the preset pre-tightening force, the assembly of the mirror column and bracket is completed.

[0050] Although the invention has been described herein in conjunction with various embodiments, those skilled in the art will understand and implement other variations of the disclosed embodiments by reviewing the accompanying drawings, disclosure, and other materials. In this specification, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude multiple components. A single processor or other unit can implement several functions listed in the specification. While certain measures are described in different embodiments, this does not mean that these measures cannot be combined to produce good results.

[0051] Although the invention has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made therein without departing from the spirit and scope of the invention. Accordingly, this specification and drawings are merely illustrative of the invention and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of the invention. Clearly, those skilled in the art can make various alterations and modifications to the invention without departing from its spirit and scope. Thus, if such modifications and modifications fall within the scope of the invention and its equivalents, the invention is also intended to include such modifications and modifications.

Claims

1. A rotating fixation forceps for artificial corneal assembly, characterized in that, When assembling the lens and framework of an artificial cornea, after the lens is held by the fixing forceps, the fixing forceps are rotated to reach the preset pre-tightening force, and then the assembly of the lens and framework is completed.

2. The rotating fixation forceps for artificial corneal assembly according to claim 1, characterized in that, The rotating fixing forceps includes a cylinder, a shaft, a spring, and a forceps body; wherein, the forceps body includes a handle and a clamping part, the handle is connected to the shaft, the spring is sleeved on the shaft and one end of the spring is fastened to one end of the shaft, and the other end of the spring is fastened to the inner wall of the end of the cylinder; the shaft and the cylinder are rotated relative to each other so that the rotating fixing forceps have a preset preload.

3. The rotating fixation forceps for artificial corneal assembly according to claim 2, characterized in that, A limit block is also provided at the outer end of the tail of the cylinder, with one end of the limit block abutting against the outer end of the tail of the cylinder.

4. The rotating fixation forceps for artificial corneal assembly according to claim 2, characterized in that, The upper end of the spring is fastened to the inner wall of the upper end of the cylinder, and the lower end of the spring is fastened to the shaft located at the lower end of the cylinder; or, The upper end of the spring is fastened to the shaft located at the upper end of the cylinder, and the lower end of the spring is fastened to the inner wall at the lower end of the cylinder.

5. The rotating fixation forceps for artificial corneal assembly according to claim 2, characterized in that, An observation window is provided on the wall of the cylinder along its axial direction, and scale lines are evenly arranged on one side of the observation window from top to bottom; before use, the preload corresponding to each scale point on the tail of the spring is calibrated.

6. The rotating fixation forceps for artificial corneal assembly according to claim 2, characterized in that, The clamping part is either a forward-facing forceps or a reverse-facing forceps.

7. The rotating fixation forceps for artificial corneal assembly according to claim 1, characterized in that, The part of the clamping section that engages with the mirror post is defined as the gripper. There are two grippers arranged opposite each other, and the grippers are designed to resemble the structure of a Luoyang shovel.

8. The rotating fixation forceps for artificial corneal assembly according to claim 7, characterized in that, The inner side of the gripper is equipped with a buffer pad, which is detachably and interference-fitted with the gripper. The buffer pad is made of medical-grade silicone, polyurethane, polyvinyl alcohol hydrogel, natural rubber or synthetic rubber. Alternatively, the grippers may be coated with a medical-grade polytetrafluoroethylene (PTFE) coating, which forms an integrated buffer ring.

9. The rotating fixation forceps for artificial corneal assembly according to claim 7, characterized in that, The clamping part is also equipped with a buckle on the gripper. After the gripper hugs the mirror column, the buckle locks in place.

10. A method of using rotating fixation forceps for artificial corneal fitting, characterized in that, Includes the following steps: Loosen the latch to create space between the jaws to engage the mirror pillar; Press the clamping part to lock the buckle, at which point the jaws grip the mirror pillar tightly; After rotating the fixing tweezers to achieve the preset pre-tightening force, the assembly of the mirror column and bracket is completed.

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