A trabecular mesh cutter

Abstract

This utility model discloses a trabecular meshwork excision device, which includes an operating handle and an excision blade. The excision blade includes a blade shank and a blade head. The proximal end of the blade shank is connected to the operating handle, and the distal end of the blade shank is connected to the blade head. The blade head has a guide platform, which includes a blade tip, a top surface, a bottom surface, a first side blade, a second side blade, and a through hole. The blade tip is used to pierce the trabecular meshwork tissue. The top surface of the platform is located on top of the blade tip. The bottom surface of the platform is opposite to the top surface. The first and second side blades are used to cut the trabecular meshwork tissue. The through hole is located between the first and second side blades, penetrating the guide platform, and is used to collect the cut trabecular meshwork tissue. During the cutting process, as the length of the cut trabecular meshwork tissue increases, it will pass through the through hole and be exposed in the surgeon's field of vision, allowing the surgeon to observe the state of the cut trabecular meshwork tissue through the through hole, which is beneficial for the surgeon to make timely adjustments based on the state of the cut.

Description

Technical Field

[0001] This application relates to the field of medical device technology, specifically to a trabecular meshwork resection device. Background Technology

[0002] Glaucoma is the leading cause of irreversible blindness worldwide. There are many surgical options for treating glaucoma, such as laser therapy, trabeculectomy, implantation of various drainage devices, and MIGS. The trabecular meshwork is a loosely structured network of tissues composed of many thin layers of connective tissue. It forms the inner wall of Schlemm's canals. In a healthy human body, aqueous humor from the anterior chamber of the eye passes through the trabecular meshwork, enters Schlemm's canals, and then enters the bloodstream through the collecting duct.

[0003] Existing technologies disclose methods to promote the outflow of aqueous humor from the anterior chamber and reduce intraocular pressure by creating openings in the trabecular meshwork, inserting drainage devices into the trabecular meshwork, or creating holes in the trabecular meshwork through laser ablation. Among these methods, creating openings directly in the trabecular meshwork is one of the more ideal treatment methods. Existing technologies also disclose some scalpels for making openings directly in the trabecular meshwork. However, existing trabecular meshwork opening scalpels have the following drawbacks: the surgeon cannot observe the state of the trabecular meshwork tissue being removed in real time during the process of cutting the trabecular meshwork tissue, resulting in low efficiency and poor accuracy in the removal of trabecular meshwork tissue. Utility Model Content

[0004] To address the aforementioned technical problems, this application provides a trabecular meshwork exciter, comprising: an operating handle; an excision blade including a blade shank and a blade head, the proximal end of the blade shank being connected to the operating handle, and the distal end of the blade shank being connected to the blade head; the blade head having a guide platform, the guide platform including: a blade tip located at the distal end of the guide platform for inserting into the trabecular meshwork tissue; a top surface of the platform located on top of the blade tip; a bottom surface of the platform opposite to the top surface of the platform; a first side blade for cutting the trabecular meshwork tissue, extending from the top surface of the platform toward the proximal end of the guide platform; a second side blade for cutting the trabecular meshwork tissue, and opposite to the first side blade, extending from the top surface of the platform toward the proximal end of the guide platform; and a through hole disposed between the first and second side blades, the through hole penetrating the guide platform for collecting the cut trabecular meshwork tissue.

[0005] In some embodiments, the lateral width of the guide platform is 0.2mm to 0.3mm, and the distance between the tip of the blade and the proximal end of the first side blade is 0.3mm to 0.4mm.

[0006] In some embodiments, the cross-section of the through hole is rectangular, and the cross-sectional size of the through hole gradually decreases along the thickness direction of the guide bearing; the maximum cross-section of the through hole is close to the tip of the blade, with a length of 0.15mm~0.4mm and a width of 0.15mm~0.25mm; the minimum cross-section of the through hole has a length of 0.1mm~0.3mm and a width of 0.1mm~0.15mm.

[0007] In some embodiments, the four corners of the through hole are rounded, and the radius of the rounded corners is 0.02mm~0.05mm.

[0008] In some embodiments, the radius of the fillet gradually decreases in the direction from the maximum cross-section to the minimum cross-section of the through hole, such that there is an angle between the fillet and the central axis of the through hole, the angle being 5° to 10°.

[0009] In some embodiments, the bottom surface of the support platform includes, in its length direction: a planar portion; an arcuate portion near the blade tip; the arcuate portion having a first arcuate profile to raise the blade tip relative to the planar portion, the radius of the first arcuate profile being 0.3~0.5mm, and the height by which the blade tip is raised relative to the planar portion being 0.03mm~0.05mm.

[0010] In some embodiments, the top surface of the bearing extends toward the inner wall of the through hole, and the guide bearing also has two opposing first and second side surfaces, which extend from the top surface of the bearing to the bottom surface of the bearing, respectively.

[0011] In some embodiments, the bottom surface of the support platform and the first side surface are connected by a first transition arc surface, the radius of which is 0.02~0.06mm; the bottom surface of the support platform and the second side surface are connected by a second transition arc surface, the radius of which is 0.02~0.06mm; the other end face of the guide platform away from the blade tip is connected to the bottom surface of the support platform by a third transition arc surface, the radius of which is 0.02~0.06mm.

[0012] In some embodiments, the tip of the blade has a second arc profile with a radius of 0.06 mm to 0.08 mm.

[0013] In some embodiments, the cutter head further includes a straight transition portion and a tapered transition portion. The straight transition portion is disposed between the guide support and the tapered transition portion. The lateral width of the straight transition portion is the same as the lateral width of the guide support, and the thickness of the straight transition portion is 0.2mm to 0.3mm. The tapered transition portion is fixedly connected to the distal end of the cutter shank.

[0014] The beneficial effects of this application are as follows: This utility model discloses a trabecular meshwork excision device, which includes an operating handle and an excision blade. The excision blade includes a blade shank and a blade head. The proximal end of the blade shank is connected to the operating handle, and the distal end of the blade shank is connected to the blade head. The blade head has a guide platform, which includes a blade tip, a top surface of the platform, a bottom surface of the platform, a first side blade, a second side blade, and a through hole. The blade tip is used to pierce the trabecular meshwork tissue. The top surface of the platform is located on the top surface of the blade tip. The bottom surface of the platform is opposite to the top surface of the platform. The first and second side blades are used to cut the trabecular meshwork tissue. The through hole is located between the first and second side blades, and extends through the guide platform to collect the cut trabecular meshwork tissue. During the cutting process, as the length of the cut trabecular meshwork tissue increases, it will pass through the through hole and be exposed in the surgeon's field of vision, allowing the surgeon to observe the state of the cut trabecular meshwork tissue through the through hole, which is beneficial for the surgeon to make timely adjustments based on the state of the cut tissue. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1A This is a perspective view of an embodiment of a trabecular mesh cutter according to the present invention; Figure 1B This is a perspective view of the cutting blade in one embodiment of a trabecular mesh cutter according to this utility model; Figure 1C yes Figure 1B A magnified view of a portion of region A in the middle; Figure 1D This is a perspective view of the cutter head in one embodiment of a trabecular mesh cutter according to this utility model; Figure 1E This is another perspective view of the cutter head in one embodiment of a trabecular mesh cutter according to this utility model; Figure 1F This is another perspective view of the cutter head in one embodiment of a trabecular mesh cutter according to this utility model; Figure 1G This is a plan view of the cutter head in one embodiment of a trabecular mesh cutter according to this utility model; Figure 1H This is a cross-sectional view of the cutter head in one embodiment of a trabecular mesh cutter according to this utility model; Figure 1I This is a cross-sectional view of the cutting blade head in one embodiment of a trabecular mesh cutter according to this utility model; Figure 1J This is a perspective view of the operating handle in one embodiment of a trabecular mesh cutter according to this utility model; Figure 1K This is a cross-sectional view of the cutter head in one embodiment of a trabecular mesh cutter according to this utility model; Figure 1L This is a plan view of the cutter head in one embodiment of a trabecular mesh cutter according to this utility model; Figure 2A This is a schematic diagram of the trabecular meshwork within the eye; Figure 2B This is a schematic diagram of the tip of the trabecular meshwork excision tool penetrating the trabecular meshwork tissue; Figure 2C This is a schematic diagram showing the penetration depth of the blade tip in the trabecular mesh cutter reaching the preset distance; Figure 2D This is a schematic diagram of the first and second side blades of the trabecular meshwork exciter cutting the trabecular meshwork tissue; Figure 2E This is a schematic diagram showing the trabecular mesh cutter after the cutting process is completed.

[0016] The attached figures are labeled as follows: 100. Trabecular mesh cutter; 200. Trabecular mesh tissue; 300. Trabecular mesh cut portion; 400. Opening; 10. Operating handle; 11. Second connecting part; 20. Cutting blade; 21. Blade shank; 22. Blade head; 220. Guide platform; 221. Blade tip; 2211. Second arc profile; 222. Top surface of platform; 223. Bottom surface of platform; 2231. Planar part; 2232. Arc surface part; 2233. First arc profile; 224. First side blade; 225. Second side blade; 226. Through hole; 2261. Rounded corner; 227. First side surface; 228. Second side surface; 2291. First transition arc surface; 2292. Second transition arc surface; 2293. Third transition arc surface; 230. Straight transition part; 240. Conical transition part; 23. Blade shank transition part; 24. First connecting part. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other alternative implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] In trabecular meshwork resection surgery, precise incision or removal of trabecular meshwork tissue 200 at different locations is typically required. This application provides a trabecular meshwork resection tool 100, designed to improve the flexibility and precision of the surgery. The tool 100 has a through-hole 226, allowing the surgeon to observe the state of the removed trabecular meshwork tissue 200 during the procedure. This facilitates timely adjustments to the surgical operation based on the removal status, improving the efficiency and accuracy of trabecular meshwork resection.

[0019] like Figures 1A to 1I As shown, in one embodiment of the trabecular mesh resection device 100, the trabecular mesh resection device 100 includes an operating handle 10 and a resection blade 20. The operating handle 10 has a rod-like structure, which facilitates operation by the surgeon's hand. The resection blade 20 includes a blade shank 21 and a blade head 22. The proximal end of the blade shank 21 is connected to the operating handle 10, and the distal end of the blade shank 21 is connected to the blade head 22. The blade head 22 has a guide platform 220, which includes a blade tip 221, a top surface 222, a bottom surface 223, a first side blade 224, a second side blade 225, and a through hole 226. The blade tip 221 is located at the distal end of the guide platform 220 for insertion. Small beam mesh structure 200; top surface 222 of the bearing platform is located on the top surface of the blade tip 221; bottom surface 223 of the bearing platform is opposite to the top surface 222 of the bearing platform; first side blade 224 and second side blade 225 are used to cut the small beam mesh structure 200, the first side blade 224 extends from the top surface 222 of the bearing platform toward the proximal end of the guide bearing platform 220; the second side blade 225 is opposite to the first side blade 224 and extends from the top surface 222 of the bearing platform toward the proximal end of the guide bearing platform 220; through hole 226 is provided between the first side blade 224 and the second side blade 225, the through hole 226 penetrates the guide bearing platform 220, and is used to collect the cut small beam mesh structure 200.

[0020] In this embodiment, when the tip 221 of the trabecular meshwork exciter 100 penetrates the trabecular meshwork tissue 200, a resection operation is performed; the first side blade 224 and the second side blade 225 of the trabecular meshwork exciter 100 cut the trabecular meshwork tissue 200; the trabecular meshwork exciter 100 completes the resection operation on the trabecular meshwork tissue 200, forming an opening 400 on the trabecular meshwork tissue 200; during the cutting process, the through hole 226 of the trabecular meshwork exciter 100 accommodates the cut trabecular meshwork tissue 200, and as the length of the cut trabecular meshwork tissue 200 increases, it will pass through the through hole 226 and be exposed in the surgeon's field of vision, allowing the surgeon to observe the state of the resection of the trabecular meshwork tissue 200 through the through hole 226, which is beneficial for the surgeon to make timely adjustments based on the resection state, such as finding that the trabecular meshwork tissue 200 is intermittently cut, the cutting angle is too large, or the trabecular meshwork tissue 200 is not cut, thereby improving the efficiency and accuracy of trabecular meshwork excision.

[0021] Furthermore, such as Figure 1B and Figure 1CAs shown, the cutting blade 20 includes a first connecting portion 24, a blade shank transition portion 23, a blade shank 21, and a cutting head 22 along its length. The first connecting portion 24 is a rod-shaped structure, as shown... Figure 1J As shown, the operating handle 10 has a second connecting part 11 adapted to the first connecting part 24. The second connecting part 11 has a hole-like structure, and the first connecting part 24 and the second connecting part 11 can be detachably connected by means of plugging, snapping, screwing, magnetic attraction, etc.

[0022] Furthermore, such as Figure 1C As shown, the cutter head 22 also includes a straight transition portion 230 and a tapered transition portion 240 connected to the guide support 220. The tapered transition portion 240 is fixedly connected to the distal end of the cutter bar 21, and the straight transition portion 230 is disposed between the guide support 220 and the tapered transition portion 240.

[0023] Furthermore, such as Figure 1G As shown, the lateral width W3 of the straight transition section 230 is the same as the lateral width of the guide platform 220.

[0024] Furthermore, such as Figure 1H As shown, in this embodiment, the thickness D1 of the straight transition portion 230 is 0.2mm~0.3mm, and the lateral width of the guide platform 220 is also 0.2mm~0.3mm.

[0025] In this embodiment, the trabecular mesh resection device is precision-machined to control the lateral width W3 of the straight transition portion 230 to 0.2mm~0.3mm and the thickness D1 of the straight transition portion 230 to 0.2mm~0.3mm, thereby strictly limiting the size range of the blade head 22. This makes the blade head 22 small in size, which can be adapted to the extremely small operating space inside the eye. It can reduce the increase in the safety gap between the blade head 22 and the surrounding tissues when adjusting the direction. Even in the eye with a narrow anterior chamber angle and a very shallow anterior chamber, rotating the blade head 22 is less likely to "sweep" the surrounding tissues, thereby reducing the risk of damage to the corneal endothelium, iris, ciliary body and other surrounding tissues, while improving the convenience and accuracy of the surgeon's intraocular surgical operation.

[0026] like Figure 1L As shown, the distance L6 between the tip of the blade 221 and the proximal end of the first side blade 224 is 0.3mm~0.4mm.

[0027] Furthermore, such as Figure 1I As shown, the tip of the blade 221 has a second arc profile 2211, and the radius R2 of the second arc profile 2211 is 0.06mm~0.08mm.

[0028] Furthermore, to facilitate the surgeon's clear visualization of the removed trabecular meshwork tissue 200 during excision and to confirm the excision effect, the through hole 226 is configured to penetrate the guide platform 220. For example... Figure 1G As shown, the cross-section of the through hole 226 is rectangular, and the cross-sectional size of the through hole 226 gradually decreases along the thickness direction of the guide bearing 220; in Figure 1G In the case of the through hole 226, the maximum cross-sectional length L1 is 0.15mm~0.4mm and the width W1 is 0.15mm~0.25mm; the minimum cross-sectional length L2 of the through hole 226 is 0.1mm~0.3mm and the width W2 is 0.1mm~0.15mm.

[0029] Combination Figure 1H As can be seen, the maximum cross-section of the through hole 226 is close to the tip 221.

[0030] Furthermore, to improve the surface smoothness of the inner wall of the through hole 226, it facilitates the smooth movement of the cut small beam mesh structure 200 from the maximum cross-section to the minimum cross-section. For example... Figure 1G As shown, the four corners of the through hole 226 are rounded 2261, and the radius R1 of the rounded corner 2261 is 0.02mm~0.05mm. Figure 1H As shown, the radius of fillet 2261 gradually decreases from the maximum cross-section to the minimum cross-section of through hole 226, so that there is an angle α between fillet 2261 and the central axis Z of through hole 226, and the angle α is 5°~10°.

[0031] Furthermore, in Figure 1H In the case of through hole 226, the opening angle β is 14°~18°.

[0032] Furthermore, such as Figure 1F and Figure 1H As shown, the top surface 222 of the foundation extends toward the inner wall of the through hole 226. The top surface 222 of the foundation is an inclined surface, which smoothly transitions with the inner wall of the through hole 226, so that the top surface 222 of the foundation and the inner wall of the through hole 226 are on the same inclined surface, reducing the obstruction when cutting the small beam mesh.

[0033] Furthermore, such as Figure 1E and Figure 1H As shown, the bottom surface 223 of the support platform includes a planar portion 2231 and an arcuate portion 2232 along its length, wherein the arcuate portion 2232 is close to the blade tip 221; the arcuate portion 2232 has a first circular arc profile 2233, so that the blade tip 221 is raised relative to the planar portion 2231, and the radius of the first circular arc profile 2233 is 0.3~0.5mm, as shown. Figure 1KAs shown, the height G1 of the blade tip 221 raised relative to the flat portion 2231 is 0.03mm~0.05mm. By raising the blade tip 221, damage to the inner wall of the sclera side of the Schlemm tube can be avoided.

[0034] Furthermore, such as Figure 1D As shown, the guide platform 220 also has two opposing first side surfaces 227 and second side surfaces 228, which extend from the top surface 222 of the platform to the bottom surface 223 of the platform, respectively.

[0035] Furthermore, such as Figure 1D and Figure 1E As shown, to reduce the risk of the guide platform 220 scratching the Schlemm pipe wall, the bottom surface 223 of the platform is connected to the first side surface 227 by a first transition arc surface 2291, the radius of which is 0.02~0.06mm; the bottom surface 223 of the platform is connected to the second side surface 228 by a second transition arc surface 2292, the radius of which is 0.02~0.06mm; the other end face of the guide platform 220 away from the blade tip 221 is connected to the bottom surface 223 of the platform by a third transition arc surface 2293, the radius of which is 0.02~0.06mm. The first transition arc surface 2291, the second transition arc surface 2292 and the third transition arc surface 2293 can all be formed by rounding corners, thereby avoiding the edge of the bottom surface 223 of the platform being too sharp.

[0036] As can be seen, the blade 22 in this embodiment is small in size, which can be adapted to the extremely small operating space inside the eye. This reduces the increase in the safety gap between the blade 22 and the surrounding tissues when adjusting the direction. Even in an eye with a narrow anterior chamber angle and a very shallow anterior chamber, rotating the blade 22 is less likely to "sweep" the surrounding tissues, thereby reducing the risk of damage to the corneal endothelium, iris, ciliary body and other surrounding tissues, avoiding problems such as endothelial cell shedding and iris pigment loss, and especially reducing the risk of intraoperative complications such as corneal edema and hyphema; at the same time, it improves the convenience and accuracy of intraocular surgical operations for the surgeon.

[0037] Secondly, the smaller blade size 22 can simultaneously reduce the size of the surgical incision, reduce the extent of tissue trauma, result in a milder postoperative inflammatory response, and accelerate surgical recovery time; it can also improve operational flexibility and reduce the difficulty of operation for surgeons, especially for surgeons with less experience.

[0038] For further details, please refer to Figures 2A to 2E This application also illustrates the cutting process of a trabecular mesh cutter using another structural form of the trabecular mesh cutter. Figures 2A to 2E The trabecular mesh cutter shown is similar to the one described above. Figures 1A to 1L Although their structural forms differ, the cutting process is the same. Secondly, Figures 2A to 2E The trabecular mesh resection device 100 involved has a collection groove for receiving the cut trabecular mesh tissue. However, this collection groove does not penetrate the guide support, which distinguishes it from the device described in this application. Figures 1A to 1L Features of the through hole 226 in the embodiment.

[0039] See Figures 2A to 2E , Figures 2A to 2E This is a schematic diagram of the trabecular meshwork exciter 100 cutting the trabecular meshwork tissue 200. Wherein, Figure 2A A schematic diagram of the trabecular meshwork within the eye (200°). Figure 2B In the middle, the tip 221 of the trabecular meshwork exciter 100 pierces the trabecular meshwork tissue 200; in Figure 2C When the penetration depth of the blade tip 221 reaches the preset distance, the cutting operation begins; Figure 2D In the process, the first side blade 224 and the second side blade 225 of the trabecular mesh resection tool 100 cut the trabecular mesh tissue 200; in Figure 2E In the process, the trabecular mesh resection device 100 completes the resection operation of the trabecular mesh tissue 200, forming an opening 400 on the trabecular mesh tissue 200. The collection groove of the trabecular mesh resection device 100 contains the cut trabecular mesh tissue (i.e., the trabecular mesh resection portion 300).

[0040] Finally, it should be noted that if the embodiments of this application involve directional indicators such as up, down, left, right, front, back, etc., then the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the attached figure). If the specific posture changes, the directional indicators will also change accordingly.

[0041] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0042] The above are merely embodiments of this application and do not limit the scope of this patent application. Any equivalent structural or procedural changes made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. A trabecular mesh cutter, characterized in that, include: Operating handle; A cutting blade includes a shank and a cutting head, wherein the proximal end of the shank is connected to the operating handle, and the distal end of the shank is connected to the cutting head; The cutter head has a guide support, the guide support comprising: The blade tip, located at the distal end of the guide platform, is used to penetrate the spur mesh structure; The top surface of the support platform is located on the top surface of the blade tip; The bottom surface of the foundation is positioned opposite to the top surface of the foundation. The first side blade, used for cutting the small beam mesh structure, extends from the top surface of the bearing platform toward the proximal end of the guide bearing platform; The second side blade is used to cut the small beam mesh structure and is disposed opposite to the first side blade, extending from the top surface of the bearing platform toward the proximal end of the guide bearing platform; A through hole is provided between the first side blade and the second side blade. The through hole passes through the guide support and can guide the cut small beam mesh structure.

2. The trabecular mesh cutter according to claim 1, characterized in that, The lateral width of the guide platform is 0.2mm~0.3mm, and the distance between the tip of the blade and the proximal end of the first side blade is 0.3mm~0.4mm.

3. The trabecular mesh cutter according to claim 2, characterized in that, The cross-section of the through hole is rectangular, and the cross-sectional size of the through hole gradually decreases along the thickness direction of the guide support. The maximum cross-section of the through hole is close to the blade tip, with a length of 0.15mm to 0.4mm and a width of 0.15mm to 0.25mm. The minimum cross-section of the through hole has a length of 0.1mm to 0.3mm and a width of 0.1mm to 0.15mm.

4. The trabecular mesh cutter according to claim 3, characterized in that, The four corners of the through hole are rounded, and the radius of the rounded corners is 0.02mm~0.05mm.

5. The trabecular mesh cutter according to claim 4, characterized in that, Along the direction from the maximum to the minimum cross-section of the through hole, the radius of the fillet gradually decreases, resulting in an angle between the fillet and the central axis of the through hole, the angle being 5° to 10°.

6. The trabecular mesh cutter according to any one of claims 1 to 5, characterized in that, The bottom surface of the foundation includes, along its length: Planar portion; The curved portion is close to the blade tip; the curved portion has a first arc profile so that the blade tip is raised relative to the flat portion, the radius of the first arc profile is 0.3~0.5mm, and the height of the blade tip raised relative to the flat portion is 0.03mm~0.05mm.

7. The trabecular mesh cutter according to claim 6, characterized in that, The top surface of the support extends toward the inner wall of the through hole, and the guide support also has two opposing first and second sides, which extend from the top surface of the support to the bottom surface of the support, respectively.

8. The trabecular mesh cutter according to claim 7, characterized in that, The bottom surface of the support platform is connected to the first side surface via a first transition arc surface, the radius of which is 0.02~0.06mm; the bottom surface of the support platform is connected to the second side surface via a second transition arc surface, the radius of which is 0.02~0.06mm; the other end face of the guide platform away from the blade tip is connected to the bottom surface of the support platform via a third transition arc surface, the radius of which is 0.02~0.06mm.

9. The trabecular mesh cutter according to claim 6, characterized in that, The tip of the blade has a second arc profile with a radius of 0.06mm to 0.08mm.

10. The trabecular mesh cutter according to claim 6, characterized in that, The cutter head further includes a straight transition section and a tapered transition section. The straight transition section is disposed between the guide support and the tapered transition section. The lateral width of the straight transition section is the same as the lateral width of the guide support. The thickness of the straight transition section is 0.2mm~0.3mm. The tapered transition section is fixedly connected to the distal end of the cutter bar.

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