Kit and method for handling the autologous flexor retinaculum in carpal tunnel release

Abstract

The application discloses a kit and a processing method for treating the autogenous flexor retinaculum in carpal tunnel release, and belongs to the technical field of medical devices. The kit comprises a collection and holding module, a mechanical trimming module and a shaping module. The mechanical trimming module comprises a rack, a lower supporting roller, an upper scraping roller and a tissue guiding assembly. The surface of the lower supporting roller is provided with anti-skid convex edges and is driven to rotate by a driving device. The surface of the upper scraping roller is provided with helically distributed scraping edges and helical chip removal grooves. The shaping module comprises a shaping mandrel and an open C-shaped forming block. The application curls the intraoperative waste flexor retinaculum into a C-shaped anti-adhesion lining with a longitudinal opening after thickness-regulating roller trimming, without the need for additional supply area material and exogenous materials. The trimming thickness is uniform, anti-cutting and anti-piercing. The C-shaped opening structure avoids secondary compression of the nerve, and the application can be prepared and applied immediately during the operation.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a kit and method for processing autologous flexor retinaculum during carpal tunnel release surgery. Background Technology

[0002] Carpal tunnel syndrome (CTS) is the most common peripheral nerve entrapment disorder. It causes symptoms such as numbness, pain, weakness, and even thenar muscle atrophy due to compression of the median nerve within the carpal tunnel. The carpal tunnel is a bony-fibrous canal formed by the carpal bones and the flexor retinaculum (also known as the transverse carpal ligament), through which the median nerve and nine flexor tendons pass. Any factor that reduces the volume of the carpal tunnel or increases the volume of its contents can trigger median nerve entrapment.

[0003] For patients with moderate to severe carpal tunnel syndrome who do not respond to conservative treatment, carpal tunnel release surgery is a recognized effective treatment. This surgery opens the carpal tunnel and relieves compression of the median nerve by cutting the flexor retinaculum. Both traditional open carpal tunnel release surgery and endoscopic carpal tunnel release surgery aim to cut the flexor retinaculum and decompress the median nerve. The cut flexor retinaculum is usually removed or discarded as surgical waste tissue.

[0004] Following carpal tunnel release surgery, adhesions between the median nerve and surrounding tissues (especially scar tissue) are a significant cause of postoperative symptom recurrence and limited nerve gliding. To address this, current techniques have proposed various postoperative nerve adhesion prevention strategies, primarily including the following categories: Category 1: Autologous tissue transplantation to prevent adhesion. Clinically, methods such as autologous fat pad transplantation and autologous vein wrapping are used to isolate nerves from surrounding tissues. However, this approach requires harvesting autologous tissue from other parts of the patient's arm, causing additional donor site trauma, scarring, and infection risks. Furthermore, autologous veins are natural, fully encircling tubular structures; when placed around a nerve, there is a risk of circumferential compression, which may actually exacerbate moderate nerve compression.

[0005] The second category: exogenous anti-adhesion materials. These include synthetic polymeric nerve conduits, collagen scaffolds, hyaluronic acid hydrogels, and polylactic acid anti-adhesion membranes. These materials are exogenous foreign bodies, presenting problems such as foreign body reactions, a mismatch between degradation rates and tissue healing, and high costs. Furthermore, some materials may trigger local inflammatory reactions during their degradation process in vivo, affecting the recovery of nerve function.

[0006] The third category: tissue-engineered nerve repair materials. Nerve wrappers are prepared through in vitro cell culture and composite biological scaffolds. The preparation cycle is long, the process is complex, and the cost is high. They cannot be prepared and used immediately in the same surgery, making it difficult to meet the clinical needs for immediate intraoperative application.

[0007] In existing technologies, there are two main ways to handle the severed flexor retinaculum: one is to discard it directly as waste tissue, which is the most common clinical practice; the other is to use it for transverse carpal ligament reconstruction, such as Z-plasty lengthening and ligament suture reconstruction, with the aim of preserving the trochlear restraint function of the flexor retinaculum and maintaining the integrity of the carpal tunnel structure.

[0008] In summary, the existing technology has the following unresolved technical problems: 1. Lack of effective means to utilize discarded flexor retinaculum during surgery: The severed flexor retinaculum has good biocompatibility and toughness, and is an ideal source of autologous anti-adhesion material. However, existing technologies treat it as waste tissue, resulting in a waste of autologous tissue resources.

[0009] 2. Lack of specialized instruments for intraoperative processing of living ligaments into anti-adhesion linings: If discarded flexor retinaculum is to be used as an anti-adhesion material, it needs to be thinned, degreased, and shaped during surgery. However, existing surgical instruments (such as scalpels, scissors, and forceps) are all general-purpose instruments, which cannot achieve uniform thinning and precise shaping of living ligaments. Manual operation results in uneven thickness, easy cutting, and low efficiency, making it difficult to meet the needs of clinical intraoperative application.

[0010] 3. Existing anti-adhesion structures pose a risk of compression: Existing solutions such as autologous vein wrapping and nerve conduits are all fully encircling structures, which pose a secondary risk of circumferential compression of the median nerve after decompression. There is a lack of non-encircling anti-adhesion structures and their forming methods that preserve radial release gaps.

[0011] Therefore, there is an urgent need to develop a specialized kit and processing method that can instantly process discarded flexor retinaculum into a non-circumferential nerve anti-adhesion liner during surgery to solve the above-mentioned technical problems. Summary of the Invention

[0012] This invention provides a kit and method for processing autologous flexor retinaculum during carpal tunnel release surgery, which can solve the technical problems in the prior art of lacking effective means to utilize discarded flexor retinaculum during surgery, lacking special instruments to process living ligaments into anti-adhesion linings in real time during surgery, and the risk of compression of existing anti-adhesion structures.

[0013] To achieve the above objectives, in a first aspect, the present invention provides the following technical solution: a kit for processing autologous flexor retinaculum during carpal tunnel release surgery, comprising a collection and retention module, a mechanical trimming module, and a shaping module. The collection and retention module is configured to receive and retain autologous flexor retinaculum tissue severed during the procedure. The mechanical trimming module includes a frame, a lower support roller, an upper scraping roller, and a tissue guiding assembly. The lower support roller is rotatably mounted on the frame and has anti-slip ridges on its surface. The lower support roller is driven to rotate by a drive device. The upper scraping roller is rotatably mounted on the frame. The upper scraping roller is located above the lower support roller. The surface of the upper scraping roller is provided with spirally distributed scraping blades, and spiral chip removal grooves are provided between the scraping blades. The tissue guiding component is located on the inlet side of the gap between the lower support roller and the upper scraping roller. The mechanical trimming module performs mechanical trimming on the held autologous flexor retinaculum tissue to form a sheet-like autologous liner tissue. The forming module includes a forming mandrel and an open C-shaped forming block that matches the forming mandrel. The forming mandrel and the open C-shaped forming block roll the sheet-like autologous liner tissue into an open C-shaped liner with a longitudinal opening.

[0014] Preferably, lifting sliders are provided on both sides of the frame, and the two ends of the upper scraping roller shaft are connected to the lifting sliders. The lifting sliders are connected to the upper end of the frame through adjusting screws.

[0015] Preferably, the tissue guiding assembly includes a guide bucket with an open upper end, a guide slope is provided inside the guide bucket, a horizontal slider is provided on the lower side of the guide slope, and a pair of parallel sliding rollers are transversely arranged through the horizontal slider, with both ends of the parallel sliding rollers connected to the frame.

[0016] Preferably, the guide bucket is provided with a horizontally extending delivery plate on the side facing the lower support roller.

[0017] Preferably, the surface of the lower support roller is covered with a medical-grade silicone layer, and the anti-slip ridges are provided on the surface of the medical-grade silicone layer.

[0018] Preferably, the upper scraping roller is hollow inside, with one end connected to a negative pressure suction source via a negative pressure pipeline, and the spiral chip discharge groove is provided with a negative pressure suction hole that communicates with the hollow inside.

[0019] Preferably, both ends of the open C-shaped molding block are connected to the rotating arc-shaped wall through hinges, and at least one rubber retaining ring is sleeved on the outer side of the open C-shaped molding block and the molding mandrel. The rubber retaining ring is configured to clamp and fix the open C-shaped molding block and the molding mandrel during molding.

[0020] Preferably, the outer periphery of the forming mandrel is provided with an axially extending clearance groove, which is configured to maintain the longitudinal opening during forming.

[0021] Preferably, the collection and holding module includes a flattening platform and a clamping member disposed on the flattening platform. The surface of the flattening platform is provided with anti-slip texture. The clamping member is configured to hold the end of the autologous flexor retinaculum tissue. The flattening platform is used to flatten the held tissue.

[0022] In a second aspect, the present invention also provides a method for processing an autologous flexor retinaculum using the kit described in the first aspect for processing carpal tunnel release surgery, comprising the following steps: S1. Collection and fixation: Take the autologous flexor retinaculum tissue that was cut during the carpal tunnel release procedure, place it on a flat platform, and fix the end of the autologous flexor retinaculum tissue with clamps to flatten the autologous flexor retinaculum tissue on the flat platform. S2. Mechanical trimming: The flattened autologous flexor retinaculum tissue is fed into the gap between the lower support roller and the upper scraping roller through the tissue guide assembly. The lower support roller is driven to rotate by the drive device. The anti-slip ridges on the surface of the lower support roller engage the lower surface of the autologous flexor retinaculum tissue and drive the autologous flexor retinaculum tissue forward. At the same time, the upper surface of the autologous flexor retinaculum tissue is continuously cut by the spirally distributed scraping blades on the surface of the upper scraping roller to remove synovial fat and thin the autologous flexor retinaculum tissue. The tissue debris generated by cutting is discharged through the spiral chip removal groove between the scraping blades to obtain sheet-like autologous liner tissue. S3. Rolling and shaping: The sheet-like autologous liner tissue is placed between the molding mandrel and the open C-shaped molding block. The sheet-like autologous liner tissue is rolled and shaped by the cooperation of the molding mandrel and the open C-shaped molding block to obtain an open C-shaped liner with a longitudinal opening.

[0023] Compared with the prior art, the beneficial effects of the present invention are: 1. The autologous flexor retinaculum that was originally discarded during carpal tunnel release surgery is recycled and processed into a nerve anti-adhesion liner. This eliminates the need to harvest autologous tissue from other sites, avoiding donor site trauma, scarring, and infection risks, while also preventing foreign body reactions from exogenous materials.

[0024] 2. The lower support roller and the upper scraping roller are parallel to each other to form a uniform roller gap. The physical gap limit ensures that the trimming thickness is consistent. The roller gap is set with a minimum gap hard limit, which structurally eliminates the risk of easy cutting through by the manual scraper.

[0025] 3. The spirally distributed scraper blades on the surface of the upper scraper roller enable continuous cutting and effectively remove liposome fat; the negative pressure suction hole at the bottom of the chip discharge groove sucks away the debris in real time, preventing fat from being pressed into the ligament fibers and causing secondary pollution.

[0026] 4. The anti-slip ridges on the surface of the lower support roller engage with the lower surface of the ligament and drive it forward automatically, eliminating the need for continuous manual pulling and reducing the trimming time from several minutes to tens of seconds. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a side sectional view of the mechanical trimming module of the present invention. Figure 3 This is a three-dimensional structural diagram of the tissue guiding component of the present invention; Figure 4 This is a schematic diagram showing the usage state of the forming module of the present invention; Figure 5 This is an enlarged structural view of the surface of the upper scraping roller of the present invention; Figure 6 This is a partial cross-sectional view of the lower support roller of the present invention.

[0028] Figure label: 1. Collection and holding module; 2. Mechanical trimming module; 3. Forming module; 11. Flattening platform; 12. Clamping component; 21. Frame; 22. Lower support roller; 23. Upper scraping roller; 24. Adjusting screw; 25. Lifting slider; 26. Negative pressure pipeline; 27. Drive device; 28. Organization and guiding assembly; 31. Forming mandrel; 32. Open C-shaped forming block; 33. Rotating arc wall; 34. Hinge; 35. Rubber retaining ring; 36. Clearance groove; 221. Anti-slip ridge; 231. Scraper blade; 232. Spiral chip removal groove; 233. Negative pressure suction hole; 281. Guide bucket; 282. Guide slope; 283. Delivery plate; 284. Parallel sliding roller; 285. Horizontal slider. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0030] like Figure 1-6As shown, this invention addresses the technical problems in the prior art, namely, the lack of effective means to utilize discarded flexor retinaculum during surgery, the lack of specialized instruments for processing living ligaments into anti-adhesion linings during surgery, and the risk of compression associated with existing anti-adhesion structures. The invention provides the following technical solution: a kit for processing autologous flexor retinaculum during carpal tunnel release surgery, comprising a collection and retention module 1, a mechanical trimming module 2, and a shaping module 3. The collection and retention module 1 is configured to receive and retain autologous flexor retinaculum tissue severed during surgery. The mechanical trimming module 2 includes a frame 21, a lower support roller 22, an upper scraping roller 23, and a tissue guiding assembly 28. The lower support roller 22 is rotatably mounted on the frame 21, and its surface is provided with anti-slip ridges 221. Roller 22 is driven to rotate by drive device 27. The upper scraping roller 23 is rotatably mounted on frame 21 and located above the lower support roller 22. The surface of the upper scraping roller 23 is provided with spirally distributed scraping blades 231, and spiral chip removal grooves 232 are provided between the scraping blades. The tissue guiding component 28 is disposed on the inlet side of the gap between the lower support roller 22 and the upper scraping roller 23. The mechanical trimming module 2 performs mechanical trimming on the held autologous flexor retinaculum tissue to form a sheet-like autologous liner tissue. The forming module 3 includes a forming mandrel 31 and an open C-shaped forming block 32 that matches the forming mandrel 31. The forming mandrel 31 and the open C-shaped forming block 32 roll the sheet-like autologous liner tissue into an open C-shaped liner with a longitudinal opening.

[0031] Specifically, the collection and retention module 1 receives and retains the autologous flexor retinaculum tissue severed during the procedure. Because excised ligaments have elastic retraction properties, they immediately curl and shorten after being severed. The collection and retention module prevents this elastic retraction by retaining the ligament ends, providing a stable and flattened processing object for subsequent mechanical trimming. This avoids trimming difficulties and uneven thickness caused by ligament curling. The lower support roller 22 and the upper scraping roller 23 work together in parallel to form a uniform roller gap. The lower support roller is responsible for traction and bearing, while the upper scraping roller is responsible for cutting and thinning. The two work together to achieve integrated continuous processing of traction and cutting. The physical gap limit of the roller gap ensures the uniformity and consistency of the trimmed thickness from a structural perspective. Moreover, as long as the roller gap setting value is greater than zero, it will not cut through the ligament, thus structurally eliminating the risk of easy cutting through by a manual scraper.

[0032] The anti-slip ridge 221 and the spiral scraper blade 231 work together to ensure that the anti-slip ridge 221 of the lower support roller 22 engages and fixes the ligament from below, while the spiral scraper blade 231 of the upper scraper roller 23 cuts from above. This cooperation between the upper and lower parts keeps the ligament stable and prevents slippage during the cutting process, significantly improving cutting accuracy and surface quality. If there is only a scraper blade without the anti-slip ridge, the ligament will slip under the cutting force, making effective cutting impossible.

[0033] The cooperation between the spiral scraper blade 231 and the spiral chip removal groove 232 allows the chips generated by the scraper to immediately enter the adjacent chip removal groove and be guided out along the spiral direction, achieving synchronous cutting and chip removal and preventing chip accumulation in the cutting area. If there is only a scraper blade without a chip removal groove, chips will accumulate at the cutting edge, resulting in increased cutting resistance, decreased surface finish, and even pressing fat into ligament fibers.

[0034] The tissue guide component 28 precisely aligns the ligament and feeds it into the roller gap, ensuring that the ligament enters the cutting zone evenly throughout the width direction, avoiding the problem of over-cutting on one side and under-cutting on the other side due to skewness.

[0035] The molding mandrel 31 and the open C-shaped molding block 32 work together, with the molding mandrel 31 providing an inner circle reference and the C-shaped molding block 32 providing an outer circle reference and actively leaving an opening. The two work together to roll the planar sheet-like tissue into a C-shaped three-dimensional structure with a longitudinal opening, so that the inner diameter, outer diameter, curvature and opening width of the liner can be controlled, which is different from the inconsistent shape problem of manual rolling.

[0036] In this embodiment, lifting sliders 25 are provided on both sides of the frame 21. The two ends of the roller shaft of the upper scraping roller 23 are connected to the lifting sliders 25. The lifting sliders 25 are connected to the upper end of the frame 21 through the adjusting screw 24. Rotating the adjusting screw can drive the lifting slider to move the upper scraping roller up and down, thereby precisely adjusting the size of the roller gap between the upper scraping roller and the lower support roller to adapt to flexor retina with different original thicknesses and lining tissue with different target thicknesses.

[0037] In this embodiment, the tissue guiding assembly 28 includes a guide hopper 281 with an open upper end. A guide ramp 282 is provided inside the guide hopper 281, and a horizontal slider 285 is provided on the lower side of the guide ramp 282. A pair of parallel rollers 284 are transversely arranged through the horizontal slider 285, and both ends of the parallel rollers 284 are connected to the frame 21. The open inlet of the guide hopper reduces the difficulty of placement, and the guide ramp smoothly guides the tissue to the horizontal roller gap. Together, they provide a convenient guiding function, preventing wrinkles or folds caused by sudden changes in direction during tissue insertion. The horizontal slider can slide laterally along the parallel rollers, making the lateral position of the guide hopper adjustable. This allows for centering adjustments based on the width and position of the ligament tissue, ensuring that the tissue is always aligned with the center of the roller gap and preventing deviation. The guide bucket 281 is provided with a horizontally extending delivery plate 283 on the side facing the lower support roller 22. After the guide slope guides the tissue to the horizontal direction, the delivery plate receives the tissue and delivers it horizontally to the roller gap inlet, avoiding the tissue from sagging, curling or getting stuck in the suspended section between the end of the guide slope and the roller gap, ensuring that the tissue enters the roller gap in a flat state. At the same time, the lower surface of the delivery plate is flush with or slightly lower than the top tangent of the lower support roller, so that the tissue smoothly transitions from the delivery plate to the surface of the lower support roller and is pulled forward after being bitten by the anti-slip ridges.

[0038] In this embodiment, the surface of the lower support roller 22 is covered with a medical silicone layer, and the anti-slip ridge 221 is disposed on the surface of the medical silicone layer; the elastic base of the silicone layer enables the anti-slip ridge to produce slight elastic deformation when biting the ligament, increasing the contact area between the ridge and the ligament surface, thereby increasing the friction; at the same time, the elastic deformation plays a buffering role, avoiding rigid damage to the ligament by the ridge.

[0039] In this embodiment, the upper scraping roller 23 is hollow inside, and one end of it is connected to a negative pressure suction source through a negative pressure pipe 26. The spiral chip removal groove 232 is provided with a negative pressure suction hole 233 that communicates with the hollow interior. The chip removal groove can only guide the chips to the roller end for discharge through the spiral guide. However, in the confined space during surgery, the chips may adhere to the chip removal groove and cannot be discharged on their own. The negative pressure suction hole is located at the bottom of the chip removal groove. It actively sucks the chips into the hollow cavity through negative pressure to ensure thorough chip removal and avoid chip accumulation. The chips generated by the scraping blade are sucked away by the negative pressure suction hole at the bottom as soon as they enter the chip removal groove. Cutting and chip suction are carried out simultaneously, avoiding the accumulation of chips near the cutting edge, which would increase cutting resistance and reduce surface quality. At the same time, it prevents fat chips from being pressed into the gaps between ligament fibers and causing secondary pollution.

[0040] In this embodiment, the two ends of the open C-shaped molding block 32 are connected to the rotating arc-shaped wall 33 through the hinge part 34. At least one rubber fixing ring 35 is sleeved on the outer side of the open C-shaped molding block 32 and the molding mandrel 31. The rubber fixing ring 35 is configured to clamp and fix the open C-shaped molding block 32 and the molding mandrel 31 during molding. The C-shaped molding block itself only covers a circumferential range of about 180°. After the rotating arc-shaped wall is closed, the coverage range can be expanded to nearly 270°, so that the outer surface of the liner is subjected to uniform external pressure shaping over a larger range, thereby improving the curvature consistency. In the unfolded state, the forming cavity is open, facilitating the insertion and removal of tissues and making operation convenient; the hinged connection allows the opening and closing of the rotating arc wall to be flexible and accurately positioned, and when closed, the inner arc surface of the arc wall and the inner arc surface of the C-shaped forming block are smoothly connected to form a continuous C-shaped forming surface; the elastic contraction force of the rubber fixing ring evenly tightens the entire forming assembly from the outside, keeping the rotating arc wall in the closed state and the C-shaped forming block and the mandrel in a fixed relative position, preventing the parts from loosening or changing shape due to the elastic rebound of the tissue during the shaping process.

[0041] In this embodiment, the forming mandrel 31 has an axially extending relief groove 36 on its outer periphery. The relief groove 36 is configured to maintain the longitudinal opening during forming. When a normal smooth cylindrical mandrel is rolled, the two free ends of the tissue tend to stick together or even overlap under the elastic recoil, making it difficult to maintain a stable opening. The relief groove actively forms a concave space on the mandrel surface. During rolling, the free ends of the tissue fall into the relief groove area. Since there is no support from the mandrel surface, the free ends cannot stick together, thus actively maintaining the existence of the longitudinal opening structurally. The width of the opening is determined by the width of the relief groove, making it controllable and consistent. The relief groove of the mandrel maintains the opening from the inside, and the C-shaped forming block restricts the shape from the outside. The internal and external cooperation ensures that the longitudinal opening is maintained throughout the entire forming and shaping process and will not close due to the elastic recoil of the tissue or external pressure. If there is only a C-shaped forming block and the mandrel has no relief groove, the opening may close due to pressure when the tissue is pressed between the mandrel and the C-shaped block.

[0042] In this embodiment, the collection and holding module 1 includes a flattening platform 11 and a clamping member 12 disposed on the flattening platform 11. The surface of the flattening platform 11 is provided with anti-slip texture. The clamping member 12 is configured to hold the end of the autologous flexor retinaculum tissue. The flattening platform 11 is used to flatten the held tissue. After the clamping member is fixed on the flattening platform and the end of the ligament is clamped and fixed, the surgeon can pull the other end of the ligament and slide it flattening it on the surface of the flattening platform. The anti-slip texture of the platform provides appropriate frictional resistance during the pulling process, so that the flattened ligament remains flat and does not retract. The friction provided by the anti-slip texture keeps the flattened ligament stable on the platform, which is convenient for the surgeon to observe the tissue state and measure the size before trimming, and to transfer the flattened tissue as a whole to the tissue guide component inlet of the mechanical trimming module.

[0043] The present invention also provides a method for processing an autologous flexor retinaculum using the kit described in the first aspect for processing carpal tunnel release surgery, comprising the following steps: S1. Collection and fixation: Take the autologous flexor retinaculum tissue that was cut during the carpal tunnel release procedure, place it on the flat platform 11, and fix the end of the autologous flexor retinaculum tissue with the clamp 12 so that the autologous flexor retinaculum tissue is flattened on the flat platform 11. S2. Mechanical trimming: The flattened autologous flexor retinaculum tissue is fed into the gap between the lower support roller 22 and the upper scraping roller 23 via the tissue guide assembly 28. The lower support roller 22 is driven to rotate by the drive device 27. The anti-slip ridges 221 on the surface of the lower support roller 22 engage with the lower surface of the autologous flexor retinaculum tissue and drive the autologous flexor retinaculum tissue forward. At the same time, the scraping blades 231 spirally distributed on the surface of the upper scraping roller 23 continuously cut the upper surface of the autologous flexor retinaculum tissue to remove synovial fat and thin the autologous flexor retinaculum tissue. The tissue debris generated by cutting is discharged through the spiral chip removal grooves 232 between the scraping blades 231 to obtain sheet-like autologous liner tissue. S3. Rolling and shaping: The sheet-like autologous liner tissue is placed between the molding mandrel 31 and the open C-shaped molding block 32. The sheet-like autologous liner tissue is rolled and shaped by the cooperation of the molding mandrel 31 and the open C-shaped molding block 32 to obtain an open C-shaped liner with a longitudinal opening.

[0044] The following is a detailed explanation of the specific structure of each module.

[0045] like Figure 1 As shown, the collection and holding module 1 includes a flat platform 11 and a clamping component 12. The flat platform 11 is a rectangular medical-grade stainless steel plate. The upper surface of the flat platform 11 is polished and densely covered with anti-slip textures to increase the friction between the platform surface and the ligament tissue. One end of the flat platform 11 has two threaded holes for mounting the clamping component 12.

[0046] The clamping element 12 is a pair of elastic stainless steel clips or U-shaped clips, which are fixed in threaded holes near the proximal end of the flat platform 11 by screws. The free end of the clamping element 12 is bent downward to form a clamping part, and the lower surface of the clamping part is provided with fine teeth to enhance the clamping force on the end of the ligament tissue. In its natural state, the clamping part of the clamping element 12 is in contact with the surface of the flat platform 11. Pressing the tail of the clamping element 12 can lift the clamping part, and after inserting the ligament tissue, releasing it will clamp it.

[0047] In use, one end of the autologous flexor retinaculum tissue severed during the operation is placed proximally on the flattening platform 11 and clamped and fixed with the clamp 12; then, the other end of the ligament is held with forceps and gently pulled toward the distal end of the flattening platform 11 to flatten the ligament on the surface of the flattening platform 11. The flattened ligament tissue can be transferred together with the flattening platform 11 to the entrance side of the mechanical trimming module 2.

[0048] like Figures 2 to 6 As shown, the mechanical trimming module 2 includes a frame 21, a lower support roller 22, an upper scraping roller 23, an adjusting screw 24, a lifting slider 25, a drive device 27, and a tissue guide assembly 28.

[0049] The frame 21 is a U-shaped stainless steel frame, including a left side plate, a right side plate, and a bottom plate (not labeled separately in the figure). The left side plate and the right side plate are arranged in parallel. The lower part of the left side plate and the right side plate are respectively provided with lower roller mounting holes for mounting the lower support roller 22; the upper part is respectively provided with vertical upper roller grooves (not shown in the figure), the width of which matches the lifting slider 25 to guide the lifting slider 25 to slide up and down. The bottom plate connects the bottom of the left side plate and the right side plate, improving the overall rigidity of the frame.

[0050] The lower support roller 22 is rotatably mounted between the lower roller mounting holes of the left and right side plates via a pair of rolling bearings. The lower support roller 22 has a roller diameter of approximately 8 mm and a length of approximately 25 mm. The outer surface of the lower support roller 22 is covered with a layer of medical-grade silicone, approximately 1 mm thick, with a Shore hardness of approximately 40A. The outer surface of the silicone layer is integrally formed with densely distributed anti-slip ridges 221, which extend in a direction perpendicular to the roller shaft (i.e., the circumferential direction), with a ridge height of approximately 0.1 mm and a spacing of approximately 0.3 mm. The anti-slip ridges 221 are evenly distributed on the roller surface to increase the friction between the roller surface and the ligament tissue. The right end roller shaft of the lower support roller 22 extends beyond the right side plate and is connected to the output shaft of the drive device 27 via a coupling.

[0051] The drive unit 27 is a stepper motor, which is fixed to the outer wall of the right side plate of the frame 21 by a motor bracket. The rated voltage of the stepper motor is DC 6-12V, and the speed range is 5-20rpm. The speed can be adjusted by an external controller (not shown in the figure). The output shaft of the stepper motor is connected to the right end roller shaft of the lower support roller 22 through a flexible coupling, driving the lower support roller 22 to rotate.

[0052] The upper scraping roller 23 is rotatably mounted between two lifting sliders 25 via a pair of bearing seats, located directly above the lower support roller 22 and parallel to it. The upper scraping roller 23 has a roller diameter of approximately 6 mm and a length of approximately 25 mm. The roller body of the upper scraping roller 23 is made of medical-grade stainless steel, and its outer surface is machined with spirally distributed micro-scraping blades 231. The rake angle of the scraping blades 231 is approximately 30°, the blade height is approximately 0.3 mm, the pitch is approximately 1 mm, and the direction of rotation is right-handed (clockwise when viewed from the right end). A spiral chip removal groove 232 is formed between adjacent scraping blades 231. The depth of the chip removal groove 232 is equal to the blade height of the scraping blade 231, and the bottom width of the groove is approximately 0.5 mm.

[0053] The upper scraping roller 23 has a hollow internal structure, forming a hollow cavity (not shown in the figure). Multiple negative pressure suction holes 233 are evenly distributed along the spiral direction at the bottom of the spiral chip removal groove 232. The diameter of the negative pressure suction holes 233 is approximately 0.5 mm, and they penetrate the roller wall radially, connecting the spiral chip removal groove 232 to the internal hollow cavity. The left end of the upper scraping roller 23 has a hollow shaft, which is connected to the negative pressure pipeline (26) via a rotary sealing joint (not shown in the figure). The end of the negative pressure pipeline (26) is equipped with a negative pressure interface for connecting to a negative pressure suction source in the operating room. The negative pressure provided by the negative pressure suction source acts on the spiral chip removal groove 232 through the hollow shaft, hollow cavity, and negative pressure suction holes 233, sucking in and discharging the tissue debris generated during cutting.

[0054] The upper scraping roller 23 is a driven roller without an independent drive device. Its rotation is driven by the lower support roller 22 through friction transmission of the ligament tissue. In the working state, the lower support roller 22 rotates clockwise (viewed from the right end), driving the ligament tissue to move forward to the right. The friction between the ligament tissue and the upper scraping roller 23 drives the upper scraping roller 23 to rotate counterclockwise, and the spiral scraping blade 231 continuously cuts the upper surface of the ligament.

[0055] The lifting sliders 25 are two rectangular stainless steel sliders, respectively installed in the upper roller grooves of the left and right side plates of the frame 21, and can slide up and down along the grooves. Each lifting slider 25 has a bearing mounting hole in the middle for mounting the bearing seat at the end of the upper scraper roller 23. The top of the lifting slider 25 has a threaded hole for threaded connection with the lower end of the adjusting screw 24.

[0056] The adjusting screw 24 is a differential screw adjusting rod, which passes vertically through the threaded hole at the top of the side plate of the frame 21. Its lower end connects to the threaded hole at the top of the lifting slider 25, and its upper end is equipped with a circular knob. When the knob is rotated, the adjusting screw 24 drives the lifting slider 25 to move up and down along the upper roller groove through the threaded transmission, thereby driving the upper scraping roller 23 to move up and down, adjusting the roller gap between the upper scraping roller 23 and the lower support roller 22. The roller gap adjustment range is 0.3-2.0mm. The adjusting screw 24 is equipped with a limit ring. When the roller gap shrinks to 0.5mm, the limit ring abuts against the top of the frame 21, preventing further shrinkage and forming a minimum gap hard limit to prevent ligament puncture due to excessively small roller gap. The side plate of the frame 21 is equipped with roller gap scale markings (not shown in the figure) to facilitate the operator to read the current roller gap value.

[0057] like Figure 3 As shown, the organization guide assembly 28 is disposed on the inlet side (front side) of the roll gap between the lower support roller 22 and the upper scraping roller 23, and includes a guide bucket 281, a guide ramp 282, a delivery plate 283, a parallel slide roller 284 and a horizontal slider 285.

[0058] The guide hopper 281 is a funnel-shaped stainless steel part with an open top. The inner rear wall of the guide hopper 281 (the side away from the roller gap) is provided with a guide slope 282. The guide slope 282 extends from the upper opening of the guide hopper 281 downward and backward to the lower opening, with an inclination angle of about 45°, which guides the ligament tissue placed from the top downward along the slope to the horizontal direction.

[0059] The bottom of the guide bucket 281 is fixed to the horizontal slider 285. The horizontal slider 285 is a rectangular stainless steel block, approximately 20mm in length and 10mm in width, with a pair of parallel sliding rollers 284 passing through it laterally (perpendicular to the roller axis direction). The parallel sliding rollers 284 are two stainless steel shafts, approximately 3mm in diameter, arranged parallel to each other with a spacing of approximately 12mm, and their ends are fixed to the front extensions of the left and right side plates of the frame 21, respectively. The horizontal slider 285 can slide laterally along the parallel sliding rollers 284, thereby driving the guide bucket 281 to move laterally, adjusting the guiding position according to the width of the ligament tissue to achieve centering guidance. The horizontal slider 285 and the parallel sliding rollers 284 are in a clearance fit, allowing for smooth sliding, and the position remains fixed due to friction when no external force is applied.

[0060] A horizontally extending delivery plate 283 is provided on the side (lower front part) of the guide hopper 281 facing the lower support roller 22. The delivery plate 283 is a thin stainless steel sheet that extends horizontally about 10 mm from the lower front edge of the guide hopper 281 toward the roller gap. The lower surface of the delivery plate 283 is flush with the top tangent of the lower support roller 22, so that the ligament tissue can smoothly transition from the delivery plate 283 to the surface of the lower support roller 22.

[0061] like Figure 1 and 4As shown, the forming module 3 includes a forming mandrel 31 and an open C-shaped forming block 32 that matches the forming mandrel 31.

[0062] The forming mandrel 31 is a cylindrical medical stainless steel rod, approximately 30 mm in length. One end of the forming mandrel 31 is equipped with a handle (not shown in the figure) with a diameter of approximately 6 mm, which facilitates the operator's grip and operation.

[0063] The outer peripheral surface of the forming mandrel 31 is provided with an axially extending clearance groove 36. The clearance groove 36 is a rectangular cross-section groove, approximately 2.5 mm wide and 1 mm deep, extending along the entire working length of the forming mandrel 31. The function of the clearance groove 36 is to prevent the two free ends of the sheet-like tissue from being tightly supported by the mandrel surface within the clearance groove area during the curling process, thereby naturally forming a longitudinal opening. The two sidewalls of the clearance groove 36 have a rounded transition with the mandrel surface to avoid pressing ridges into the tissue.

[0064] The open C-shaped molding block 32 is a C-shaped (i.e., non-complete ring) medical stainless steel block with an inner diameter approximately 2 mm larger than the outer diameter of the molding mandrel 31 and an axial length of approximately 25 mm. The opening angle of the C-shaped molding block 32 is approximately 180°, and the opening position corresponds to the clearance groove 36 of the molding mandrel 31.

[0065] The two ends of the open C-shaped forming block 32 are connected to the rotating arc-shaped wall 33 via hinges 34. The rotating arc-shaped wall 33 is an arc-shaped stainless steel sheet with an arc that matches the inner arc surface of the C-shaped forming block 32. Its length is approximately 1 / 8 of the circumference (approximately 45°), and its axial length is the same as that of the C-shaped forming block 32. The hinges 34 are miniature stainless steel hinges, allowing the rotating arc-shaped wall 33 to rotate around the ends of the C-shaped forming block 32. When the rotating arc-shaped wall 33 unfolds outward, the forming cavity is open, facilitating the insertion of sheet-like tissues. When the rotating arc-shaped wall 33 closes inward, its inner arc surface smoothly connects with the inner arc surface of the C-shaped forming block 32, together forming a forming outer mold surface covering approximately 270°.

[0066] The molding module 3 also includes at least one rubber retaining ring 35. The rubber retaining ring 35 is a circular medical-grade silicone rubber ring, with its inner diameter in its natural state approximately 1-2 mm smaller than the outer diameter of the C-shaped molding block 32, and possesses elastic contraction force. In use, the rubber retaining ring 35 is fitted onto the outside of the closed C-shaped molding block 32 and molding mandrel 31 assembly. The elastic contraction force of the rubber clamps and fixes the entire molding assembly, keeping the rotating arc-shaped wall 33 closed and maintaining the relative position of the C-shaped molding block 32 and molding mandrel 31 fixed. One or two rubber retaining rings 35 can be used, fitted near both ends of the assembly.

[0067] The collection and retention module 1, mechanical trimming module 2, and shaping module 3 are three separate and independent components used sequentially during the operation: The collection and retention module 1 is used to collect and flatten the ligament immediately after ligament transection. Its flattening platform 11 serves as a transfer carrier, transferring the flattened ligament tissue to the entrance side of the mechanical trimming module 2. The mechanical trimming module 2 is a tabletop independent device placed on the surgical instrument table, with its tissue guiding component 28's guide bucket 281 facing upwards, facilitating the surgeon to transfer the flattened ligament tissue from the flattening platform 11 into the guide bucket 281. The shaping module 3 is a handheld operating component. After the mechanical trimming module 2 outputs sheet-like autologous liner tissue, the surgeon uses forceps to grasp the sheet-like tissue and transfer it to the shaping module 3 for curling and shaping. There is no rigid connection between the three modules; tissue transfer between modules is achieved through manual operation by the surgeon. This separate design facilitates flexible intraoperative operation and independent sterilization of each module.

[0068] The following details the complete method for processing autologous flexor retinaculum using the kit of this embodiment: Step S1, collecting, holding, and flattening: During carpal tunnel release, after the flexor retinaculum is completely severed, the surgeon uses forceps to remove the severed flexor retinaculum from the surgical incision and immediately places it on the flat platform 11 of the collection and retention module 1. One end of the ligament tissue is placed under the clamp 12 proximal to the flat platform 11, and the tail of the clamp 12 is pressed to lift the clamping part. After inserting the ligament end, the clamp 12 is released, clamping the ligament end. Then, the other end of the ligament is held with another pair of forceps and gently pulled towards the distal end of the flat platform 11, applying a longitudinal tension of about 0.5-1.5N to completely flatten the curled ligament on the surface of the flat platform 11. During the flattening process, the fiber direction of the ligament is carefully observed to ensure that it is perpendicular to the long side of the flat platform 11. After flattening, the flat platform 11, along with the flattened ligament tissue, is transferred to the vicinity of the tissue guide component 28 of the mechanical trimming module 2.

[0069] Step S2, Mechanical trimming: First, based on the original thickness and target lining thickness of the flexor retinaculum, adjust the gap between the upper scraping roller 23 and the lower support roller 22 to the target value by rotating the knob of the adjusting screw 24. Start the drive device 27 to drive the lower support roller 22 to rotate at a speed of approximately 10 rpm. At the same time, connect the negative pressure interface at the left end of the upper scraping roller 23 to the negative pressure suction source in the operating room and turn on the negative pressure suction.

[0070] Then, the surgeon uses forceps to grasp the free end of the flattened ligament tissue from the flattening platform 11 and inserts it into the upper opening of the guide bucket 281 of the tissue guide assembly 28. The ligament tissue slides down the guide ramp 282 inside the guide bucket 281 to a horizontal direction and is smoothly fed into the gap between the lower support roller 22 and the upper scraping roller 23 via the delivery plate 283. If the ligament tissue is not aligned with the center of the gap, the horizontal slider 285 can be pushed laterally along the parallel slide roller 284 to adjust the lateral position of the guide bucket 281 so that the ligament tissue is aligned with the center of the gap.

[0071] After the ligament tissue enters the gap between the rollers, the anti-slip protrusions 221 on the silicone layer of the lower support roller 22 engage with the lower surface of the ligament. As the lower support roller 22 rotates, the ligament tissue automatically moves towards the exit side. At the same time, the friction between the ligament tissue and the upper scraping roller 23 causes the upper scraping roller 23 to rotate passively (counterclockwise). The spiral scraping blades 231 on the surface of the upper scraping roller 23 continuously cut the upper surface of the ligament, removing the synovial fat tissue attached to the ligament surface and thinning the ligament to the thickness set by the gap between the rollers. The tissue debris (synovial, fat, and ligament debris) generated by the cutting immediately enters the adjacent spiral chip removal groove 232 and is sucked into the internal hollow cavity of the upper scraping roller 23 under the negative pressure of the negative pressure suction hole 233 at the bottom of the chip removal groove 232. It is then discharged through the hollow roller shaft and the negative pressure pipeline (26) into the collection bottle of the negative pressure suction source.

[0072] After the ligament tissue has completely passed through the roller gap, a sheet-like autologous liner tissue with uniform thickness, smooth surface, and thorough removal of synovial fat is obtained. The drive device 27 and negative pressure suction are then turned off, and the sheet-like autologous liner tissue is removed from the roller gap exit side using tweezers.

[0073] Step S3, Curling and shaping: First, select a molding mandrel 31 of suitable diameter and rotate the relief groove 36 of the molding mandrel 31 to an upward position. With the smooth surface of the sheet-like autologous liner tissue obtained in step S2 facing the molding mandrel 31, attach the starting end of the sheet-like tissue to the side of the molding mandrel 31 opposite to the relief groove 36 (i.e., the lower side of the mandrel). Hold the starting end with your finger, and then roll the sheet-like tissue around the molding mandrel 31 so that the two free ends of the sheet-like tissue finally fall within the area of ​​the relief groove 36. Because the relief groove 36 has a concave structure, the two free ends of the sheet-like tissue are not supported by the mandrel surface within the relief groove area and will not adhere to each other, thus naturally forming a longitudinal opening with a width of approximately 2.5 mm.

[0074] After curling, the open C-shaped molding block 32 is placed over the molding mandrel 31 containing the sheet-like tissue from the outside, aligning the opening of the C-shaped molding block 32 with the clearance groove 36 of the molding mandrel 31. Then, the rotating arc-shaped walls 33 at both ends of the C-shaped molding block 32 are brought inward, so that the inner arc surface of the rotating arc-shaped wall 33 smoothly connects with the inner arc surface of the C-shaped molding block 32, together pressing the sheet-like tissue from the outside. One or two rubber retaining rings 35 are taken and inserted axially from the end of the molding assembly, placed on the outside of the C-shaped molding block 32 and the rotating arc-shaped wall 33, using the elastic contraction force of the rubber retaining rings 35 to tighten and fix the entire molding assembly.

[0075] After clamping, allow the molded component to stand for approximately 30-60 seconds to set. If necessary, immerse it in 37°C saline solution to accelerate setting. Once setting is complete, first remove the rubber retaining ring 35, then unfold and rotate the arc-shaped wall 33 outwards. Next, remove the open C-shaped molding block 32 from the molding mandrel 31. Finally, pull the molding mandrel 31 out of the C-shaped liner along the axial direction to obtain an open C-shaped autologous nerve anti-adhesion liner with a longitudinal opening.

[0076] The resulting C-shaped liner can be immediately used in carpal tunnel release surgery: The C-shaped liner is held with forceps, opened from the longitudinal opening, and placed around the decompressed median nerve, ensuring the smooth inner surface of the C-shaped liner faces the median nerve. The longitudinal opening is adjusted to face the palmar side, so that the C-shaped liner does not completely encircle the median nerve, preserving a radial release gap. The C-shaped liner acts as an isolation barrier, preventing postoperative scar tissue from adhering to the median nerve. Furthermore, due to its incomplete encirclement structure, it does not cause secondary compression of the median nerve.

[0077] As a verification example of the technical solution in this embodiment: a simplified experiment to demonstrate the effectiveness of the instrument path described in this invention in an SD rat model of perisciatic nerve adhesions: To illustrate the feasibility of the device pathway in this embodiment and its device-level impact on the microenvironment of nerve-perineurotic adhesions, this verification example uses an SD rat model of sciatic nerve-perineurotic adhesions to perform a simplified simulation of the device pathway.

[0078] 1. Experimental Materials and Grouping: This validation case used adult male Sprague-Dawley rats (weighing 220–250 g) randomly divided into three groups of four rats each (n=4): experimental group (C-type liner group, where an autologous fascia sheet was used to simulate an open C-type liner shaped by enzyme-free mechanical trimming and bluntly placed around the nerve after decompression), control group 1 (simple decompression group, nerve decompression only, no liner placed), and control group 2 (autologous fat control group, where autologous fat sheets were used to cover the nerve). All rats were anesthetized by intraperitoneal injection of sodium pentobarbital and housed individually under standard laboratory animal conditions postoperatively. The procedures described in this validation case comply with the relevant regulations of the institution regarding the use and management of laboratory animals.

[0079] 2. Operating Procedures: After anesthesia and disinfection of the surgical area in rats, the target nerve was exposed, and a perineurial scar adhesion model was created. In the experimental group, autologous tissue sheets were mechanically trimmed and shaped into an open C-shaped liner using the instrument pathway described in this invention, and then placed around the decompression nerve, ensuring that the longitudinal opening retained a gap to prevent compression. Control group 1 underwent only decompression without placing a liner; control group 2 was covered with an autologous fat sheet. The entire trimming, shaping, and placement process was completed in the same surgery, simulating the closed-loop instrument pathway described in this invention.

[0080] 3. Evaluation indicators: Four weeks post-surgery, tissue samples were taken from the tissue blocks surrounding the nerve for the following purposes: (1) the degree of adhesion around the nerve was assessed according to the Petersen grading system for nerve adhesion (0–4 grades); (2) the percentage of scar tissue area around the nerve was assessed using Masson trichrome staining; (3) the sliding displacement (mm) of the nerve relative to the interface of the surrounding tissue was measured to reflect the nerve sliding situation; and (4) the tensile load (N) of the formed C-shaped liner was measured using cadaver / ex vivo mechanical methods as a reference for structural integrity.

[0081] 4. Experimental Results: All data are expressed as mean ± standard deviation (n=4). Results are detailed in Tables 1 to 3.

[0082] Table 1. Experimental Grouping and Treatment in Example 1 Table 2. Assessment of perineural adhesions and scarring 4 weeks postoperatively (n=4, mean ± standard deviation) Table 3. Nerve slippage parameters and lining biomechanical references at 4 weeks postoperatively (n=4, mean ± standard deviation) 5. Results Explanation: As shown in Tables 2 and 3, in the simplified experiment of forming an open C-shaped liner from autologous tissue using the instrument path described in this invention and bluntly placing it around a decompressed nerve, the experimental group showed lower scores in nerve adhesion grading and the proportion of scar area around the nerve compared to the two control groups, but higher sliding displacement at the nerve-tissue interface compared to the two control groups. These results indicate that the instrument path in this embodiment is operable at the instrument level. The formed open C-shaped liner retains an anti-impact gap at the longitudinal opening, and the phenomenon of reduced adhesion and improved nerve sliding can be observed in this simplified simulation model, which helps support the effectiveness of the instrument path of this invention.

[0083] The above embodiments and verification examples are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A kit for handling autologous flexor retinaculum during carpal tunnel release surgery, characterized in that, The device includes a collection and holding module (1), a mechanical trimming module (2), and a shaping module (3). The collection and holding module (1) is configured to receive and hold autologous flexor retinaculum tissue severed during surgery. The mechanical trimming module (2) includes a frame (21), a lower support roller (22), an upper scraping roller (23), and a tissue guide assembly (28). The lower support roller (22) is rotatably mounted on the frame (21) and has anti-slip ridges (221) on its surface. The lower support roller (22) is driven to rotate by a drive device (27). The upper scraping roller (23) is rotatably mounted on the frame (21) and located above the lower support roller (22). The scraping roller (23) has spirally distributed scraping blades (231) on its surface, and spiral chip removal grooves (232) are provided between the scraping blades. The tissue guiding component (28) is located on the inlet side of the gap between the lower support roller (22) and the upper scraping roller (23). The mechanical trimming module (2) performs mechanical trimming on the held autologous flexor retina tissue to form a sheet-like autologous liner tissue. The forming module (3) includes a forming mandrel (31) and an open C-shaped forming block (32) that matches the forming mandrel (31). The forming mandrel (31) and the open C-shaped forming block (32) curl the sheet-like autologous liner tissue into an open C-shaped liner with a longitudinal opening.

2. The kit for handling autologous flexor retinaculum during carpal tunnel release surgery according to claim 1, characterized in that: The frame (21) is provided with lifting sliders (25) on both sides. The two ends of the roller shaft of the upper scraping roller (23) are connected to the lifting sliders (25). The lifting sliders (25) are connected to the upper end of the frame (21) through adjusting screws (24).

3. The kit for handling autologous flexor retinaculum during carpal tunnel release surgery according to claim 2, characterized in that: The organization guide assembly (28) includes a guide bucket (281) with an open top. A guide slope (282) is provided inside the guide bucket (281). A horizontal slider (285) is provided on the lower side of the guide slope (282). A pair of parallel slide rollers (284) are provided transversely through the horizontal slider (285). The two ends of the parallel slide rollers (284) are connected to the frame (21).

4. The kit for handling autologous flexor retinaculum during carpal tunnel release surgery according to claim 3, characterized in that: The guide bucket (281) is provided with a horizontally extending delivery plate (283) on the side facing the lower support roller (22).

5. The kit for handling autologous flexor retinaculum during carpal tunnel release surgery according to claim 1, characterized in that: The surface of the lower support roller (22) is covered with a medical silicone layer, and the anti-slip ridges (221) are provided on the surface of the medical silicone layer.

6. The kit for handling autologous flexor retinaculum during carpal tunnel release surgery according to claim 1, characterized in that: The upper scraping roller (23) is hollow inside, and one end of it is connected to a negative pressure suction source through a negative pressure pipeline (26). The spiral chip discharge groove (232) is provided with a negative pressure suction hole (233) that communicates with the hollow inside.

7. The kit for handling autologous flexor retinaculum during carpal tunnel release surgery according to claim 1, characterized in that: The two ends of the open C-shaped molding block (32) are connected to the rotating arc wall (33) through the hinge (34). At least one rubber fixing ring (35) is sleeved on the outside of the open C-shaped molding block (32) and the molding mandrel (31). The rubber fixing ring (35) is configured to clamp and fix the open C-shaped molding block (32) and the molding mandrel (31) during molding.

8. The kit for handling autologous flexor retinaculum during carpal tunnel release surgery according to claim 1, characterized in that: The outer periphery of the forming mandrel (31) is provided with an axially extending clearance groove (36), which is configured to maintain the longitudinal opening during forming.

9. The kit for handling autologous flexor retinaculum during carpal tunnel release surgery according to claim 1, characterized in that: The collection and holding module (1) includes a flattening platform (11) and a clamping member (12) disposed on the flattening platform (11). The surface of the flattening platform (11) is provided with anti-slip texture. The clamping member (12) is configured to hold the end of the autologous flexor retinaculum tissue. The flattening platform (11) is used to flatten the held tissue.

10. A method for processing an autologous flexor retinaculum kit as described in any one of claims 1-9 during carpal tunnel release surgery, characterized in that, Includes the following steps: S1. Collection and fixation: Take the autologous flexor retinaculum tissue that was cut during the carpal tunnel release procedure, place it on the flat platform (11), and fix the end of the autologous flexor retinaculum tissue with the clamp (12) so that the autologous flexor retinaculum tissue is flattened on the flat platform (11). S2, Mechanical trimming: The flattened autologous flexor retinaculum tissue is fed into the gap between the lower support roller (22) and the upper scraping roller (23) through the tissue guide assembly (28). The lower support roller (22) is driven to rotate by the drive device (27). The anti-slip ridges (221) on the surface of the lower support roller (22) bite the lower surface of the autologous flexor retinaculum tissue and drive the autologous flexor retinaculum tissue forward. At the same time, the scraping blades (231) spirally distributed on the surface of the upper scraping roller (23) continuously cut the upper surface of the autologous flexor retinaculum tissue to remove synovial fat and thin the autologous flexor retinaculum tissue. The tissue debris generated by cutting is discharged through the spiral chip removal groove (232) between the scraping blades (231) to obtain sheet-like autologous liner tissue. S3, Rolling and shaping: The sheet-like autologous liner tissue is placed between the molding mandrel (31) and the open C-shaped molding block (32). The sheet-like autologous liner tissue is rolled and shaped by the cooperation of the molding mandrel (31) and the open C-shaped molding block (32) to obtain an open C-shaped liner with a longitudinal opening.

Images