Ulna osteotomy guiding device and ulna osteotomy system

Abstract

The invention discloses an ulna osteotomy guiding device and an ulna osteotomy system, and belongs to the technical field of surgical operation auxiliary appliances. The guide assembly comprises a guide block, a rotating strip, a first guide ruler and a second guide ruler; the guide block is movably connected with the first groove and can move along the first groove; the rotating strip is rotationally connected with the guide block; the first guide ruler is fixedly connected with the rotating strip, the second guide ruler is slidably connected with the rotating strip, and the first guide ruler is parallel to the second guide ruler; the limiting assembly comprises at least two limiting blocks, and each limiting block is provided with at least two detachable limiting needles. The core problems that in a traditional ulna osteotomy, osteotomy guiding precision is insufficient, the adjusting freedom degree of an auxiliary fixing device is limited, and stability in the operation is poor are solved, and an integrated solution is provided for a complex osteotomy operation.

Description

TECHNICAL FIELD

[0001] The application relates to a ulna osteotomy guiding device and a ulna osteotomy system, and belongs to the technical field of surgical operation auxiliary tools. BACKGROUND

[0002] Ulnar carpal impingement syndrome is a painful condition caused by increased mechanical load on the ulnar side of the wrist, which is often seen in patients with static or dynamic positive variation of the ulna. The variation of the ulna causes significant changes in the force transmitted through the ulnocarpal joint. If not treated in time, it may lead to degenerative changes in the ulnocarpal joint, seriously affecting the quality of life and hand function of the patient. Current research shows that surgical treatment is the only method to cure it.

[0003] Ulna osteotomy surgery shortens the length of the ulna to restore the normal anatomical structure of the distal ulnar joint and reduce the pressure on the ulnar side of the wrist joint. The key technical points of the surgery are the length of the osteotomy, the angle of the osteotomy, and the fixation method of the fracture site after osteotomy. The length of the osteotomy should be determined according to the value of the preoperative wrist joint positive variation of the ulna, and the variation of the ulna after osteotomy should be kept between -1 and 1 mm. The angle of the osteotomy should also be analyzed and determined according to the variation characteristics of the patient's ulna. Oblique osteotomy can increase the contact area of the osteotomy surface, which is beneficial to postoperative recovery. Oblique osteotomy requires two osteotomy planes to be parallel to each other, otherwise the force line of the ulna will change after shortening the ulna, and the anatomical structure of the distal ulnar joint and the wrist joint will change, making it difficult to achieve satisfactory treatment effect. The fixation method of the fracture site after osteotomy depends on the actual situation of the osteotomy angle and length.

[0004] Chinese patent 202210137690.X discloses a osteotomy external fixation bracket for treating ulna impingement syndrome, but it can only assist in the length and angle of osteotomy through the bracket, and does not consider the fixation method after osteotomy. In addition, ulna osteotomy surgery is performed on the arm, and during the actual operation, medical personnel need to control multiple joints such as the patient's arm, elbow, shoulder, etc., causing great inconvenience to the operation. SUMMARY

[0005] To solve the above problems, the application provides a ulna osteotomy guiding device and a ulna osteotomy system, which guides the length, angle and fixation angle of osteotomy through the guiding device, improving the accuracy of osteotomy surgery; at the same time, through the ulna osteotomy system, the ulna osteotomy guiding device is used in cooperation with other devices, which is more convenient for the implementation of the operation.

[0006] According to one aspect of the application, a ulna osteotomy guiding device is provided, comprising: a base, wherein a first groove is arranged on the base; A guide assembly, the guide assembly comprising a guide block, a rotating bar, a first guide ruler and a second guide ruler; the guide block is movably connected to the base and moves along the first groove; The rotating bar is rotatably connected to the guide block; The first guide ruler is fixedly connected to the rotating bar, the second guide ruler is slidably connected to the rotating bar, and the first guide ruler is parallel to the second guide ruler; The limiting assembly comprises at least two limiting blocks, each of which is provided with at least two detachable limiting pins.

[0007] Optionally, the guide block is further provided with a through hole, the through hole is hourglass-shaped, and a spherical cavity is provided in the middle of the hourglass-shaped through hole, and a rotatable hollow spherical shell is provided in the spherical cavity.

[0008] Optionally, an extension tube is provided at the upper end of the hollow spherical shell, and the extension tube is integrally formed with the hollow spherical shell.

[0009] Optionally, the limiting pin is fixed to the limiting assembly by a fastening screw and can rotate within a plane.

[0010] Optionally, the base is further provided with a second groove, and two second grooves are arranged in parallel at both ends of the base, and each second groove is provided with at least one limiting block, and the limiting block can move along the second groove.

[0011] Optionally, a first screw rod is provided in at least one second groove, and the limit block is sleeved with the first screw rod; a second screw rod is also provided in the limit block, the first end of the second screw rod is perpendicular to the first screw rod, and the second end of the second screw rod is provided with a handle, and the handle is fixedly connected to the second screw rod and can drive the second screw rod to rotate.

[0012] Specifically, the first screw rod is engaged with the second screw rod or is connected via gears.

[0013] According to another aspect of the present application, an ulnar osteotomy system is provided, comprising the above-mentioned ulnar osteotomy guide device, an osteotomy auxiliary fixation device, a cutting device and at least two fixation pins; The ulna osteotomy guide device is fixedly connected to the osteotomy auxiliary fixation device. The auxiliary fixation device includes: A support portion, the support portion comprising a first bracket and a second bracket, The first bracket includes a plurality of fixing rings and a plurality of first rigid support frames, The second bracket includes a plurality of fixing rings and a plurality of second rigid support frames, The fixing ring includes a rigid fixing section and a flexible adjustment strap; The adjustment part includes a flexion and extension adjustment component and a flip adjustment component, The flexion and extension adjustment assembly includes a steering block, a fixed block and a rotating connector, the steering block is fixedly connected to at least one of the second rigid support frames, and the fixed block is fixedly connected to the first rigid support frame; The flip adjustment assembly includes a control member and a rotating member, the rotating member is fixedly connected to the second bracket; the control member and the rotating member are hinged.

[0014] Specifically, the fixing ring is distributed along the radial direction of the arm, and the first rigid support frame and the second rigid support frame are distributed along the circumferential direction of the arm.

[0015] Specifically, the rotating connection member is a steering angle code.

[0016] In particular, the cutting device comprises at least one blade.

[0017] Optionally, the control member and the rotating member are mutually cooperating worm and worm gear assemblies.

[0018] Optionally, the rotating member further includes a flexible adjustment strap.

[0019] Since the limiting needle and blade are directly inserted into the human body, they will cause damage to the human body while playing a limiting role. Generally, drugs are injected into the human body after the surgical operation is completed to achieve an anti-infection effect. However, the relevant drugs need to be absorbed by the human body through blood circulation, and it is difficult to act specifically on the insertion site of the limiting needle, affecting the effect of the medication at the insertion site of the limiting needle.

[0020] Optionally, the surfaces of the limiting pin and the blade are provided with a coating, and the coating comprises, from the base material of the part outward, an antibacterial metal layer, a transition layer and an outer protective layer; The transition layer is a biocompatible polymer modified with succinic anhydride and drug carrier particles; The outer protective layer is carboxyl-modified polyvinyl alcohol.

[0021] The coating provided on the limiting needle and the blade is composed of three layers. The antibacterial metal layer closest to the substrate can be well combined with the limiting needle and give the limiting needle good antibacterial properties. However, if only the antibacterial metal layer exists, it can only have an antibacterial effect and it is difficult to achieve anti-infection at the insertion site. Therefore, a transition layer needs to be provided to achieve the loading and sustained release of anti-infective drugs. However, due to the large difference in components between the anti-infective drugs and the antibacterial metal layer in this application, it is difficult to achieve a good combination between the two, and the release of the anti-infective drugs requires continuous and slow release. Therefore, a transition layer is provided outside the antibacterial metal layer in this application to achieve a good combination of the two and control the slow release of the drugs therein.

[0022] The transition layer of this scheme is composed of a biocompatible polymer modified with succinic anhydride and drug carrier particles. Firstly, the carboxyl groups obtained by modification on the biocompatible polymer can form a good bond with the nanoparticles in the antibacterial metal layer. At the same time, the polymer can also serve as a skeleton material to provide a certain load space for the drug carrier particles and control the release rate. Secondly, the biocompatible polymer can form hydrogen bonds with the drug, thereby improving the bioavailability of the drug and allowing the drug to be released continuously and effectively and exert its effect.

[0023] Specifically, the thickness of the antibacterial metal layer is 0.2-1 μm. The antibacterial metal layer is prepared by magnetron sputtering, and its thickness is controlled by the time and power of magnetron sputtering.

[0024] Specifically, the drug carrier particles are hydroxyl-modified carbon nanomaterials; The introduction of hydroxyl groups into carbon nanomaterials, on the one hand, can react with the carboxyl groups on the biocompatible polymer serving as the skeleton of the transition layer to form good binding properties, and can also form hydrogen bonds with the polyvinyl alcohol of the outer protective layer to form a stable structure. This can not only achieve stable binding with the transition layer and slow and stable release of drugs, but also, on the other hand, increase the shelf life of the coating before contact with the human body and ensure the applicability of the coating.

[0025] The outer protective layer is provided to ensure that the functional coating has a certain stability before contacting the human body, and will not be released prematurely and become ineffective.

[0026] Specifically, the metal in the antibacterial metal layer is at least one of nano-silver particles and nano-copper particles.

[0027] The use of the above two nanoparticles as components of the antibacterial metal layer can, firstly, provide continuous antibacterial properties and secondly reduce production costs; thirdly, have strong bonding with the limiting needle, thereby improving the fixation of the overall coating on the limiting needle; and fourthly, will not affect the puncture effect of the limiting needle, thereby ensuring the smooth progress of the operation.

[0028] Specifically, the biocompatible polymer includes one of polyvinyl pyrrolidone and polyvinyl caprolactam.

[0029] Specifically, the preparation method of the biocompatible polymer modified with succinic anhydride is: The biocompatible polymer is added to DMF and stirred at 80° C. until completely dissolved to obtain a biocompatible polymer solution; adding succinic anhydride to the biocompatible polymer solution so that the molar ratio of repeating units in the biocompatible polymer to succinic anhydride is 1:1.2; DMAP catalyst was added, and the reaction was carried out at 85° C. for 16 to 24 hours. The product was separated and dried to obtain a succinic anhydride-modified biocompatible polymer.

[0030] Optionally, the carbon nanomaterial includes one of single-walled carbon nanotubes, multi-walled carbon nanotubes, and graphene.

[0031] Specifically, the length of the single-walled carbon nanotube is 100-300 nm and the diameter is 1-2 nm; the length of the multi-walled carbon nanotube is 50-200 nm and the diameter is 5-15 nm; the diameter of the graphene is 50-200 nm and the thickness is 0.5-5 nm.

[0032] If the particle size is too small, it is easy to agglomerate, resulting in poor dispersion, thus affecting the uniformity of drug release; if the particle size is too large, it is difficult to distribute in the molecular skeleton of the transition layer, losing the three-dimensional distribution ability, and unable to achieve slow release of the drug.

[0033] Preferably, the carbon nanomaterial is single-walled carbon nanotube.

[0034] Single-walled carbon nanotubes have a high aspect ratio and can form a uniform drug carrier network with a low addition amount, which is conducive to the subsequent uniform release of the drug.

[0035] Specifically, the modified carbon nanomaterial is loaded with a drug after being coated and modified, and the drug is an anti-infective drug.

[0036] The drug sustained-release layer uses carbon nanomaterials as drug carriers, which are loaded with drugs after modification and then coated with polyethylene glycol or polyvinyl alcohol. The carbon nanomaterials have a large specific surface area and can provide a large number of adsorption sites for drugs. At the same time, the active groups such as aldehyde, carboxyl, and hydroxyl in the drugs have a strong affinity with the hydroxyl groups in the modified carbon nanomaterials and the outer protective layer, and have good compatibility. After entering the human body, they can take effect quickly and achieve subsequent continuous slow release, which improves the applicability of the coating and will not denature, thereby extending the shelf life.

[0037] The outer protective layer provides strength support for the inner layer in dry conditions. Once implanted in the human body, the outer protective layer rapidly dissolves upon contact with water, exposing the functional inner layer and providing practical application value. The polyvinyl alcohol in the outer protective layer is modified through carboxylation. This, on the one hand, improves the solubility of the polyvinyl alcohol in water, allowing the coated structure to dissolve rapidly upon entry into the human body, exposing the drug in the transition layer and enabling rapid drug delivery. Furthermore, the carboxylation of the polyvinyl alcohol imparts a certain degree of weak anti-infective properties, which, combined with the sustained-release drug in the transition layer, creates a gradient release, enhancing the overall anti-infective properties of the coating.

[0038] The carboxylation modification process of polyvinyl alcohol is: Prepare a 10 wt% solution of polyvinyl alcohol; add 10% NaOH solution dropwise to the PVA solution to make the molar ratio of NaOH to polyvinyl alcohol end groups 3:1, and stir at 60°C for 30 minutes; Sodium chloroacetate was added to make the molar ratio of ClCH2COONa:polyvinyl alcohol end group = 1.2:1, and the reaction was terminated after reflux at 95°C for 2 hours. The modified carboxylated modified polyvinyl alcohol was obtained by separation and purification.

[0039] Specifically, the anti-infective drug is an antibiotic, which may be one of cefazolin and cefuroxime.

[0040] The beneficial effects of this application include but are not limited to: 1. The ulnar osteotomy guide device provided herein utilizes a guide block movably connected to a first groove, a stop block movably connected to a second groove, a rotating bar, and a second guide ruler slidably connected to the rotating bar. This allows for adjustment of the guide device's stop position, osteotomy direction, osteotomy length, and osteotomy angle, ensuring that the osteotomy path is consistent with preoperative planning and achieving optimal surgical outcomes.

[0041] 2. The ulnar osteotomy system provided herein utilizes a first and second support bracket to secure the patient's arm and joints during surgery. The adjustment unit, designed to adjust and secure the patient's arm during surgery, works in conjunction with the position-limiting assembly. This eliminates the need for assistants to secure the patient during surgery and improves overall stability and efficiency.

[0042] 3. The ulnar osteotomy guide device and ulnar osteotomy system provided in this application feature a modular support design that is compatible with diverse patient anatomy, reducing the frequency of intraoperative instrument changes. This effectively addresses the core issues of traditional ulnar osteotomy procedures, such as insufficient osteotomy guide precision, limited adjustment freedom of auxiliary fixation devices, and poor intraoperative stability. This provides an integrated solution for complex osteotomy procedures. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 Schematic top view of the ulna osteotomy guide device according to an embodiment of the present application; Figure 2 Schematic diagram of the overall structure of the ulna osteotomy guide device according to an embodiment of the present application; Figure 3 A schematic cross-sectional view of the internal structure of a through hole according to an embodiment of the present application; Figure 4 This is an overall schematic diagram of the auxiliary fixing device involved in the embodiment of the present application; Figure 5 This is an overall schematic diagram of the flip adjustment assembly involved in an embodiment of the present application.

[0044] List of parts and reference numerals: 1. Base; 2. First groove; 3. Guide assembly; 4. Guide block; 5. Rotating bar; 6. First guide ruler; 7. Second guide ruler; 8. Limit assembly; 9. Limit block; 10. Limit pin; 11. Through hole; 12. Spherical cavity; 13. Hollow spherical shell; 14. Extension tube; 15. Second groove; 16. First screw rod; 17. Second screw rod; 18. Handle; 19. First bracket; 20. Second bracket; 21. Fixed ring; 22. First rigid support frame; 23. Second rigid support frame; 24. Flexion and extension adjustment assembly; 25. Flip adjustment assembly; 26. Control member; 27. Rotating member. DETAILED DESCRIPTION

[0045] The present application is described in detail below with reference to embodiments, but the present application is not limited to these embodiments.

[0046] Unless otherwise defined, all professional and scientific terms used herein have the same meanings as those familiar to those skilled in the art. The reagents and raw materials used in the present invention can be purchased through conventional channels. Unless otherwise specified, the reagents and raw materials used in the present invention are used in accordance with conventional methods in the art or in accordance with the product instructions. In addition, any methods and materials similar to or equivalent to those described herein can be applied to the present invention. The preferred embodiments and materials described in this patent are for illustrative purposes only.

[0047] In order to more clearly understand the above-mentioned objects, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other in the absence of conflict.

[0048] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0049] In addition, in the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0051] In this application, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0052] In this application, unless otherwise expressly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0053] Example 1 refer to Figures 1 to 3 , an embodiment of the present application discloses an ulna osteotomy guide device, comprising: A base 1 is provided with a first groove 2; The guide assembly 3 includes a guide block 4, a rotating bar 5, a first guide ruler 6 and a second guide ruler 7; the guide block 4 is movably connected to the base 1 and moves along the first groove 2; The rotating bar 5 is rotatably connected to the guide block 4; The first guide ruler 6 is fixedly connected to the rotating bar 5, and the second guide ruler 7 is slidably connected to the rotating bar 5, and the first guide ruler 6 and the second guide ruler 7 are parallel; The limiting assembly 8 includes at least two limiting blocks 9 , and the limiting blocks 9 are provided with at least two detachable limiting pins 10 .

[0054] In this solution, by setting the first groove 2, the displacement of the guide block 4 is achieved, which is used to determine and adjust the osteotomy position during the operation; by rotating the rotating bar 5 and the guide block 4, the osteotomy angle can be adjusted after the osteotomy position is determined, which can adapt to the individual differences of patients to perform surgery, achieve better surgical effects and adapt to more surgical situations; by setting a parallel first guide ruler 6 and a second guide ruler 7, and the second guide ruler 7 and the rotating bar 5 can only be displaced along a straight line but cannot be deflected, the parallelism of the osteotomy surface is guaranteed, thereby improving the bone fit after osteotomy, so that the osteotomy surface can grow smoothly in the later stage, ensuring the surgical recovery effect; the displacement of the second guide ruler 7 is used to adjust the osteotomy distance.

[0055] As a specific embodiment, the base 1 is provided with a length scale for adjusting the distance between the two limit blocks 9 to determine the limit position; the guide block 4 is provided with an angle scale for adjusting the rotation angle of the rotating bar 5 to determine the osteotomy angle; and the rotating bar 5 is provided with a length scale for adjusting the distance between the first guide ruler 6 and the second guide ruler 7 to accurately determine the osteotomy length. These arrangements work together to clearly define the precise positioning relationship of the entire process, from initial orientation, osteotomy angle, and osteotomy distance, thereby achieving precise osteotomy.

[0056] As an embodiment, a through hole 11 is further provided on the guide block 4, and the through hole 11 is hourglass-shaped, and a spherical cavity 12 is provided in the middle of the hourglass-shaped through hole 11, and a rotatable hollow spherical shell 13 is provided in the spherical cavity 12, and the upper and lower ends of the hollow spherical shell 13 are provided with through holes 11 that match the diameter of the fixed needle.

[0057] The fixing nail can pass through the through hole 11 to fix the proximal and distal ulna after osteotomy. Under this setting, the hollow spherical shell 13 can rotate in the through hole 11, allowing the fixing nail to be adaptively adjusted in the through hole 11, so that the angle of the fixing nail can be more flexibly adjusted according to the osteotomy situation, achieving better fixation and improving the postoperative healing effect.

[0058] As a preferred embodiment, the outer surface of the hollow spherical shell 13 and / or the surface of the through hole 11 are non-smooth. This configuration creates a certain amount of friction between the contact surfaces of the hollow spherical shell 13 and the through hole 11, and rotation of the hollow spherical shell 13 within the through hole 11 can only be achieved with the help of external force. This configuration prevents the hollow spherical shell 13 from rotating arbitrarily during surgery due to the friction, thus avoiding affecting the operational accuracy of the fixation needle. Therefore, the above configuration can achieve fixation only when necessary, thereby improving both operational safety and operational accuracy.

[0059] As an embodiment, an extension tube 14 is provided at the upper end of the hollow spherical shell 13 , and the extension tube 14 and the hollow spherical shell 13 are integrally formed.

[0060] The fixing needle passes through the extension tube 14 and the through hole 11 in sequence. The extension tube 14 can guide and support the fixing needle when fixing the broken bone, thereby improving the stability of the fixing operation.

[0061] refer to Figures 1 and 2 As an embodiment, the limiting needle 10 is fixed to the limiting block 9 by tightening the screw.

[0062] Under this setting, the limiting needle is fixed to the limiting block 9 by a fastening screw. The limiting needle 10 is rotated by loosening the fastening screw, and the fastening screw is tightened after adjusting to the appropriate position. Therefore, the limiting needle 10 can be rotated within a certain range and the relative angle can be adjusted, which can provide multi-point support for the navigation device and better achieve limitation.

[0063] refer to Figure 1~Figure 2 As an embodiment, a second groove 15 is further provided on the base 1 , including two grooves at both ends, and the limiting block 9 moves along the second groove 15 .

[0064] Under this setting, at least one limit block 9 is provided in each second groove 15, and the limit block 9 in each second operation can be moved in the second groove 15 to achieve position adjustment. Therefore, during actual operation, it can be flexibly adjusted according to the specific situation of the patient, thereby increasing the adjustable range of the limit block 9, increasing the operational flexibility of the device, and achieving better fixation of the navigation device at the surgical position according to the surgical conditions.

[0065] As an embodiment, a first screw rod 16 is provided in at least one second groove 15, and the limit block 9 is sleeved with the first screw rod 16; a second screw rod 17 is also provided in the limit block 9, and the first end of the second screw rod 17 is perpendicular to the first screw rod 16, and the second end of the second screw rod 17 is provided with a handle 18, and the handle 18 is fixedly connected to the second screw rod 17 and can drive the second screw rod 17 to rotate.

[0066] Specifically, the first screw rod 16 and the second screw rod 17 are engaged or connected via gears.

[0067] refer to Figure 4~Figure 5 , According to another aspect of the present application, there is provided an ulnar osteotomy system, comprising the above-mentioned ulnar osteotomy guide device, an osteotomy auxiliary fixation device, a cutting device and at least two fixation pins; The ulna osteotomy guide device is fixedly connected to the osteotomy auxiliary fixation device.

[0068] As an embodiment, the auxiliary fixing device includes: The support portion includes a first bracket 19 and a second bracket 20, The first bracket 19 includes a plurality of fixing rings 21 and a plurality of first rigid support frames 22. The second bracket 20 includes a plurality of fixing rings 21 and a plurality of second rigid support frames 23. The fixing ring 21 includes a rigid fixing section and a flexible adjustment strap; The adjustment part includes a flexion and extension adjustment component 24 and a flip adjustment component 25, The flexion and extension adjustment assembly 24 includes a steering block, a fixed block and a rotating connector, the steering block is fixedly connected to at least one of the second rigid support frames 23, and the fixed block is fixedly connected to the first rigid support frame 22; The flip adjustment assembly 25 includes a control member 26 and a rotating member 27 . The rotating member 27 is fixedly connected to the second bracket 20 . The control member 26 and the rotating member 27 are hinged.

[0069] In existing ulna osteotomy surgeries, there is a lack of a device to fix the patient's elbow, so the patient's limb needs to be manually controlled and fixed during the operation, which is inconvenient for surgical operations.

[0070] Therefore, this solution uses the first bracket 19 and the second bracket 20 to stabilize the patient's joints during the operation, which can not only prevent the patient's movements during the operation from affecting the implementation of the operation, but also facilitate the operation of the osteotomy, greatly improving the efficiency of the operation; at the same time, the adjustment part is designed to allow the doctor to fine-tune and fix the patient's joints as needed during the operation, which is convenient for the implementation of the operation.

[0071] As an embodiment, the rotating member 27 is fixedly connected to the base 1 of the osteotomy guide device.

[0072] Under this setting, the osteotomy guide device is rigidly connected to the rotating member 27 to achieve linkage adjustment between the two, thereby ensuring the stability of the osteotomy guide device, thereby ensuring the accuracy of the osteotomy operation during the operation and improving the surgical effect.

[0073] As an embodiment, the control member 26 and the rotating member 27 are mutually cooperating worm and worm gear assemblies.

[0074] The worm gear assembly provides a self-locking function to prevent the risk of displacement caused by angular deviation due to accidental touch or intraoperative vibration during surgery, further improving the accuracy of the surgery and the osteotomy effect.

[0075] As an embodiment, the rotating member 27 further includes a flexible adjustment strap.

[0076] A flexible adjustment strap refers to a fixing part made of flexible material. This setting can be used to assist in the removal and tightening of the fixing device, thereby improving the operational flexibility of the device. Moreover, since it is made of flexible material, it will not cause other side effects to the human body, making it easy to promote on a large scale.

[0077] Specifically, the flexible adjustment strap can be a Velcro, which can flexibly determine the fastening position according to the patient's physical condition during the process of taking off and fastening. There is no need to customize it according to the patient's body shape. It has universal applicability, can save production costs and is easy to use.

[0078] Example 2 In this embodiment, the carboxylation modification process of polyvinyl alcohol is as follows: Prepare a 10 wt% solution of polyvinyl alcohol; add 10% NaOH solution dropwise to the polyvinyl alcohol solution to make the molar ratio of NaOH to polyvinyl alcohol end groups 3:1, and stir at 60°C for 30 minutes; Sodium chloroacetate was added to make the molar ratio of ClCH2COONa polyvinyl alcohol end groups = 1.2:1, and the reaction was refluxed at 95°C for 2 hours, then the reaction was terminated and the modified carboxylated polyvinyl alcohol was obtained by separation and purification.

[0079] The preparation method of biocompatible polymer modified with succinic anhydride is as follows: The biocompatible polymer is added to DMF and stirred at 80° C. until completely dissolved to obtain a biocompatible polymer solution; adding succinic anhydride to the biocompatible polymer solution so that the molar ratio of repeating units in the biocompatible polymer to succinic anhydride is 1:1.2; DMAP catalyst was added, and the reaction was carried out at 85° C. for 20 h. The product was separated and dried to obtain a succinic anhydride-modified biocompatible polymer.

[0080] This embodiment involves the preparation of the limit pin and the blade coating, taking the limit pin as an example: Limit pin 1# (1) After cleaning the limiting pin substrate, magnetron sputtering was performed to obtain a limiting pin covered with a 0.2 μm thick Ag antibacterial metal layer; (2) Dispersing the modified multi-walled carbon nanotubes in the cefazolin solution so that the mass ratio of the modified multi-walled carbon nanotubes to the drug is 1:2, stirring for 12 hours and separating to obtain a modified carbon nanomaterial loaded with the anti-infective drug; (3) dispersing the modified carbon nanomaterial loaded with the drug in a succinic anhydride-modified polyvinyl caprolactam solution at a volume ratio of 1:9, and then immersing the limiting needle obtained in step (1) in the aforementioned solution, extracting it, and drying it to obtain a limiting needle covered with an antibacterial metal layer and a transition layer; (4) Carboxylated polyvinyl alcohol is fully dissolved in a solvent with a volume ratio of water to ethanol of 1:4, and the limiting needle covered with the antibacterial metal layer and the transition layer is immersed in the solution of carboxylated polyvinyl alcohol, and freeze-dried to obtain a limiting needle covered with three layers of coating.

[0081] Limit pin 2# (1) After cleaning the limit pin substrate, magnetron sputtering was performed to obtain a part covered with a 1 μm thick Cu antibacterial metal layer; (2) Dispersing the modified graphene in a cefazolin solution with a mass ratio of modified graphene to drug of 1:2, stirring for 12 h and separating to obtain a modified carbon nanomaterial loaded with an anti-infective drug; (3) dispersing the modified carbon nanomaterial loaded with the drug in a carboxylated polyvinyl caprolactam solution at a volume ratio of 1:9, and then immersing the limiting needle obtained in step (1) in the aforementioned solution, extracting it, and drying it to obtain a limiting needle covered with an antibacterial metal layer and a transition layer; (4) Carboxylated polyvinyl alcohol is fully dissolved in a solvent with a volume ratio of water to ethanol of 1:4, and the limiting needle covered with the antibacterial metal layer and the transition layer is immersed in the solution of carboxylated polyvinyl alcohol, and freeze-dried to obtain a limiting needle covered with three layers of coating.

[0082] Limit pin 3# (1) After cleaning the limit pin substrate, magnetron sputtering was performed to obtain a part covered with a 0.7 μm thick Ag and Cu antibacterial metal layer; (2) Dispersing the modified single-walled carbon nanotubes in the cefuroxime solution so that the mass ratio of the modified single-walled carbon nanotubes to the drug is 1:2, stirring for 12 hours and separating to obtain a modified carbon nanomaterial loaded with the anti-infective drug; (3) dispersing the modified carbon nanomaterial loaded with the drug in a succinic anhydride-modified polyvinyl pyrrolidone solution at a volume ratio of 1:9, and then immersing the limiting needle obtained in step (1) in the aforementioned solution, extracting it, and drying it to obtain a limiting needle covered with an antibacterial metal layer and a transition layer; (4) Carboxylated polyvinyl alcohol is fully dissolved in a solvent with a volume ratio of water to ethanol of 1:4, and the limiting needle covered with the antibacterial metal layer and the transition layer is immersed in the solution of carboxylated polyvinyl alcohol, and freeze-dried to obtain a limiting needle covered with three layers of coating.

[0083] Limit pin 4# The difference from the limiting needle 3# is that the modified carbon nanotubes are replaced by modified carbon nanofibers.

[0084] Limit pin 5# The difference from the limiting needle 3# is that the polyvinyl pyrrolidone is modified by maleic anhydride.

[0085] Limit pin 6# The difference from the limiting needle 3# is that the modified carbon nanotubes are replaced by unmodified carbon nanotubes.

[0086] Limit pin 7# The difference from the limiting needle 3# is that the polyvinyl alcohol is not carboxylated.

[0087] Experimental example The limiting pins 1# to 7# obtained in Example 2 were immersed in artificial plasma. The samples were weighed every 1 minute, and the time it took for the mass of the coating on the limiting pin to degrade to 20% of the initial mass of the coating was recorded as the degradation time; In the above experiment, the limit needle with the coating degraded to 20% of the initial coating mass was subjected to relevant biological evaluation according to ISO 22196-2011 "Evaluation method for antimicrobial properties of plastic surfaces" and according to the national standard GB / T16886.5-2017 "Biological evaluation of medical devices - Part 5 - In vitro cytotoxicity test"; The results are shown in Table 1: Table 1

[0088] According to the data in Table 1, the modified outer protective layer can dissolve rapidly in the plasma environment; under the action of the antibacterial metal layer and the transition layer, it can effectively kill and inhibit Staphylococcus aureus and Escherichia coli, and the coated limiting needle passes the cytotoxicity test and has good biocompatibility.

[0089] The various embodiments in this specification are described in a progressive manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the system embodiments are generally similar to the method embodiments, so the description is relatively simple. For relevant parts, refer to the description of the method embodiments.

[0090] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. An ulna osteotomy guide device, characterized in that: include: a base, wherein the base is provided with a first groove; A guide assembly, the guide assembly comprising a guide block, a rotating bar, a first guide ruler and a second guide ruler; the guide block is movably connected to the first groove and can move along the first groove; The rotating bar is rotatably connected to the guide block; The first guide ruler is fixedly connected to the rotating bar, the second guide ruler is slidably connected to the rotating bar, and the first guide ruler is parallel to the second guide ruler; The limiting assembly comprises at least two limiting blocks, each of which is provided with at least two detachable limiting pins.

2. The ulna osteotomy guide device according to claim 1, characterized in that: The guide block is further provided with a through hole, which is in the shape of an hourglass, and a spherical cavity is provided in the middle of the hourglass-shaped through hole, and a rotatable hollow spherical shell is provided in the spherical cavity.

3. The ulna osteotomy guide device according to claim 2, characterized in that: An extension tube is provided at the upper end of the hollow spherical shell, and the extension tube and the hollow spherical shell are integrally formed.

4. The ulna osteotomy guide device according to claim 1, characterized in that: The limiting pin is fixed to the limiting assembly by a fastening screw.

5. The ulna osteotomy guide device according to claim 1, characterized in that: The base is further provided with two second grooves, which are arranged in parallel at both ends of the base. Each second groove is provided with at least one limiting block, and the limiting block can move along the second groove.

6. The ulna osteotomy guide device according to claim 1, characterized in that: A first screw rod is provided in at least one second groove, and the limit block is sleeved with the first screw rod; a second screw rod is also provided in the limit block, the first end of the second screw rod is perpendicular to the first screw rod, and the second end of the second screw rod is provided with a handle, and the handle is fixedly connected to the second screw rod and can drive the second screw rod to rotate.

7. An ulnar osteotomy system, characterized in that: The invention comprises the ulna osteotomy guide device according to any one of claims 1 to 6, an osteotomy auxiliary fixation device, a cutting device and at least two fixation pins; The ulna osteotomy guide device is fixedly connected to the osteotomy auxiliary fixation device.

8. The ulna osteotomy system according to claim 7, characterized in that: The auxiliary fixing device comprises: A support portion, the support portion comprising a first bracket and a second bracket, The first bracket includes a plurality of fixing rings and a plurality of first rigid support frames, The second bracket includes a plurality of fixing rings and a plurality of second rigid support frames, The fixing ring includes a rigid fixing section and a flexible adjustment strap; The adjustment part includes a flexion and extension adjustment component and a flip adjustment component, The flexion and extension adjustment assembly includes a steering block, a fixed block and a rotating connector, the steering block is fixedly connected to at least one of the second rigid support frames, and the fixed block is fixedly connected to the first rigid support frame; The flip adjustment assembly includes a control member and a rotating member, the rotating member is fixedly connected to the second bracket; the control member and the rotating member are hinged.

9. The ulna osteotomy system according to claim 8, characterized in that: The control member and the rotating member are worm and worm gear components that cooperate with each other.

10. The ulna osteotomy system according to claim 8, characterized in that The rotating member further comprises a flexible adjustment strap.

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