Osteochondral syringe type adsorption pen

Abstract

The invention relates to an osteochondral syringe type adsorption pen. The osteochondral syringe type adsorption pen comprises an adsorption sleeve with an inner cavity, an adsorption assembly connected with one end of the adsorption sleeve and an operating rod. The adsorption assembly is provided with adsorption holes communicated with the inner cavity, and the front end face of the adsorption assembly is an arc-shaped adsorption face. Two opposite ends of the operating rod are respectively marked as a first end extending into the inner cavity and a second end located outside the inner cavity and provided with a pressing part, and the first end is provided with a piston head matched with the inner wall of the inner cavity; an elastic device is arranged between the operating rod and the adsorption sleeve, and the operating rod overcomes the elastic force of the elastic device when bearing external force and drives the piston head to move towards one side of the adsorption assembly. And when the external force is removed, the piston head is driven to move towards one side far away from the adsorption assembly under the action of the restoring force of the elastic device. Non-contact operation in the whole process of graft obtaining and transplantation is achieved, edge damage is avoided, and structural integrity is guaranteed. Meanwhile, the obtaining and transplanting integrated function is achieved, surgical instrument replacement is reduced, and the pollution risk is reduced.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of medical devices, in particular to a bone cartilage injector type adsorption pen. BACKGROUND

[0002] Bone cartilage defects are common in weight-bearing joints such as knees and ankles, and osteochondral autograft (OCA) is the main treatment method. The core is to obtain a columnar osteochondral graft with complete structure and accurately implant it, and its integrity directly determines the success rate of transplantation. The main clinical process is to use a trephine to separate the bone, then use a saw to cut the bone, and then use a surgical blade to manually peel off the bone. When the bone is moved from the donor area to the recipient area, it is easy to cause damage to the graft, and the efficiency is low and depends on the experience of the operator. In addition, due to the small operation space and other complex reasons during the operation, the special grabbing instrument for orthopedics has the risk of contact damage, and the existing surgical instrument cannot realize contact-free operation throughout the process, and there are problems of damage, contamination and efficiency. Therefore, special instruments need to be developed to solve the above problems. SUMMARY

[0003] The present disclosure provides a bone cartilage injector type adsorption pen to solve the problems in the prior art.

[0004] The bone cartilage injector type adsorption pen provided by the present disclosure comprises: An adsorption sleeve having an inner cavity; An adsorption assembly connected to one end of the adsorption sleeve and configured to have an adsorption hole in communication with the inner cavity; the front end surface of the adsorption assembly is configured as an arc-shaped adsorption surface; An operating rod having opposite two ends, respectively a first end extending into the inner cavity, and a second end located outside the inner cavity; the first end of the operating rod is provided with a piston head cooperating with the inner wall of the inner cavity, and the second end is configured to be provided with a pressing portion; wherein a resilient device is provided between the operating rod and the adsorption sleeve, and the operating rod is configured to overcome the elastic force of the resilient device when subjected to an external force, thereby driving the piston head to move to one side of the adsorption assembly; and when the external force is removed, the piston head is driven to move away from the adsorption assembly under the restoring force of the resilient device.

[0005] In an embodiment of the present disclosure, a first stop portion is provided on the inner wall of the inner cavity, a second stop portion is provided on the operating rod, and the resilient device is a spring sleeved on the operating rod, one end of the spring is configured to abut against the first stop portion, and the other end of the spring is configured to abut against the second stop portion.

[0006] In an embodiment of the present disclosure, an external thread is provided on the operating rod, and the second stop portion is configured to be threadedly connected with the operating rod.

[0007] In one embodiment of this disclosure, a screw is provided on the second stop portion, the screw being configured to fix the second stop portion to the operating lever.

[0008] In one embodiment of this disclosure, the first stop includes an expansion sleeve and a motion mechanism located within the expansion sleeve, the motion mechanism being configured to move axially relative to the expansion sleeve to cause the expansion sleeve to expand to an interference fit with the inner wall of the inner cavity.

[0009] In one embodiment of this disclosure, the inner wall of the expansion sleeve is configured to be conical; the motion mechanism includes a nut located inside the expansion sleeve and having an outer wall configured to be conical, and a bolt cooperating with the nut, the bolt being configured to drive the nut to move within the expansion sleeve, so that the outer wall of the nut pushes the inner wall of the expansion sleeve to expand.

[0010] In one embodiment of this disclosure, the outer wall of the piston head is provided with a first annular groove and a second annular groove distributed along its axial direction. A first sealing ring that mates with the inner wall is provided in the first annular groove, and a second sealing ring that mates with the inner wall is provided in the second annular groove.

[0011] In one embodiment of this disclosure, the first sealing ring is configured to be disposed on the side of the piston head adjacent to the adsorption assembly, and the second sealing ring is configured to be disposed on the side of the piston head away from the adsorption assembly; wherein, in its natural state, the surface of the first sealing ring that mates with the inner wall is a plane, and the surface of the second sealing ring that mates with the inner wall is an arcuate surface in its natural state.

[0012] In one embodiment of this disclosure, one end of the adsorption sleeve is provided with a connector, which is configured to be threadedly connected to the adsorption sleeve; the connector is provided with an opening; and the adsorption assembly is configured to communicate with the opening via an adapter.

[0013] In one embodiment of this disclosure, the adapter is configured to be threadedly connected to the opening, and an annular groove is provided at the position where the adapter exposes the opening, and the adsorption assembly is configured to engage within the annular groove.

[0014] One beneficial effect of this disclosure is that the osteocartilage syringe-type adsorption pen provided includes an adsorption sleeve with an inner cavity, one end of which is connected to an adsorption component. The adsorption component has an adsorption hole communicating with the inner cavity, and its front end face is an arc-shaped adsorption surface. It also includes an operating rod with its two ends respectively designated as a first end extending into the inner cavity and a second end located outside the inner cavity. The first end of the operating rod has a piston head that cooperates with the inner wall of the inner cavity, and the second end has a pressing part. An elastic device is installed between the operating rod and the adsorption sleeve. When the operating rod is subjected to external force, it overcomes the elastic force and drives the piston head towards the adsorption component. After the external force is removed, the piston head moves away from the adsorption component under the restoring force of the elastic device. This osteocartilage syringe-type adsorption pen is a specialized instrument adapted for osteocartilage grafts, enabling contactless operation throughout the graft acquisition and transplantation process, avoiding edge damage and ensuring structural integrity. It also achieves integrated acquisition and transplantation functions, reducing the need for surgical instrument replacement and lowering the risk of contamination.

[0015] Other features and advantages of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments of the present disclosure and, together with their description, serve to explain the principles of the present disclosure.

[0017] Figure 1 This is a schematic diagram of the structure of the osteocartilage syringe-type adsorption pen disclosed herein; Figure 2 This is a cross-sectional schematic diagram of the osteocartilage syringe-type adsorption pen provided in this disclosure; Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle; Figure 4 yes Figure 2 A magnified view of a portion of point B in the middle; Figure 5 This is a cross-sectional schematic diagram of the first stop portion in an embodiment of this disclosure; Figure 6 This is a cross-sectional schematic diagram of the adsorption component in an embodiment of this disclosure; Figure 7 This is a cross-sectional schematic diagram of the connector in an embodiment of this disclosure; Figure 8 This is a cross-sectional schematic diagram of the adapter in an embodiment of this disclosure.

[0018] Figures 1 to 8 The one-to-one correspondence between the component names and the reference numerals in the figures is as follows: 10. Adsorption sleeve; 20. Adsorption assembly; 30. Operating rod; 40. Piston head; 50. Pressing part; 60. Elastic device; 61. Spring; 11. First stop part; 12. Second stop part; 121. Screw; 32. Expansion sleeve; 33. Motion mechanism; 34. Nut; 35. Bolt; 41. First annular groove; 42. Second annular groove; 401. First sealing ring; 402. Second sealing ring; 70. Connector; 80. Adapter. Detailed Implementation

[0019] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.

[0020] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use.

[0021] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0023] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.

[0024] In this article, "first," "second," etc., are used only to distinguish one another, and not to indicate degree of importance, order, or prerequisite for each other.

[0025] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0026] This disclosure provides a bone and cartilage syringe-type adsorption pen, comprising an adsorption sleeve with an inner cavity, one end of which is connected to an adsorption component. The adsorption component has an adsorption hole communicating with the inner cavity, and its front end is an arc-shaped adsorption surface. It also includes an operating rod with its two ends respectively designated as a first end extending into the inner cavity and a second end located outside the inner cavity. The first end of the operating rod has a piston head that cooperates with the inner wall of the inner cavity, and the second end has a pressing part. An elastic device is installed between the operating rod and the adsorption sleeve. When the operating rod is subjected to external force, it overcomes the elastic force and drives the piston head towards the adsorption component. After the external force is removed, the piston head moves away from the adsorption component under the restoring force of the elastic device. This bone and cartilage syringe-type adsorption pen is a specialized instrument adapted for bone and cartilage grafts, enabling contactless operation throughout the graft acquisition and transplantation process, avoiding edge damage and ensuring structural integrity. It also achieves integrated acquisition and transplantation functions, reducing the need for surgical instrument replacement and lowering the risk of contamination.

[0027] The relevant terms used in this disclosure are explained as follows: Osteocartilage transplantation: Osteocartilage grafts are taken from an autologous or allogeneic donor, processed, and then transplanted to the recipient (patient) in the area of ​​articular cartilage defect.

[0028] Osteochondrial grafts: columnar grafts consisting of a cartilage layer and subchondral bone, used to repair articular cartilage defects, typically 8-26 mm in diameter; High-pressure sterilization: Sterilization is performed using high-pressure steam at 121℃ and 0.1MPa, which meets the sterilization standards for surgical instruments.

[0029] The specific embodiments of this disclosure are described below with reference to the accompanying drawings.

[0030] refer to Figure 1 This disclosure provides a bone and cartilage syringe-type adsorption pen, which is suitable for orthopedic bone and cartilage transplantation surgery. It is used to remove bone and cartilage grafts from autologous or allogeneic donors and transfer them to the articular cartilage defect area of ​​the recipient (patient). The pen includes an adsorption sleeve 10, an adsorption component 20, and an operating rod 30.

[0031] like Figure 2As shown, the adsorption sleeve 10 has an inner cavity, and the adsorption component 20 is connected to one end of the adsorption sleeve 10 and has an adsorption hole communicating with the inner cavity. The front end face of the adsorption component 20 is an arc-shaped adsorption surface. The adsorption sleeve 10, as the core load-bearing and sealing component of the osteocartilage syringe-type adsorption pen of this disclosure, is not only a key structure connecting the adsorption component 20 and the operating rod 30, but also the foundation for forming a stable negative pressure environment. Its overall design must consider structural strength, sealing performance, operational adaptability, and clinical aseptic requirements. The adsorption sleeve 10 has a hollow cylindrical structure and can be integrally formed from 1216L medical stainless steel. This material has excellent mechanical strength, biocompatibility, and corrosion resistance; it can withstand high-pressure steam sterilization at 121℃ and 0.1MPa, and maintains structural integrity and sealing performance without degradation after sterilization, fully meeting the dual requirements of reusable surgical instruments and aseptic standards. Preferably, the length of the chamber portion in the adsorption sleeve 10 that can form negative pressure is 35mm, and its inner diameter is 9mm.

[0032] As an alternative, the main body of the adsorption sleeve 10 can be made of titanium alloy. Compared with 1216L medical stainless steel, this material is 40% lighter and has better biocompatibility, making it suitable for clinical scenarios with special requirements on instrument weight (such as complex osteocartilage transplantation surgery involving prolonged hand-held operation). Its structural strength and sterilization resistance are consistent with stainless steel, requiring only adjustments to the processing technology to adapt to the material characteristics of titanium alloy without affecting the core function. However, titanium alloy is more expensive and is suitable for high-end clinical needs.

[0033] refer to Figure 6 The adsorption component 20 is cylindrical in shape, with a diameter suitable for the size range of commonly used osteocartilage grafts (8mm-26mm). Different diameter adsorption components 20 can be replaced according to surgical needs to meet diverse clinical scenarios. The curved adsorption surface of the adsorption component 20 is precisely designed to perfectly conform to the articular surface of the osteocartilage graft, effectively avoiding cartilage layer damage caused by concentrated local pressure. The adsorption hole is located at the center of the curved adsorption surface, preferably with a diameter of 2mm. This design ensures that negative pressure is concentrated on the central area of ​​the graft, improving adsorption stability while reducing traction damage to the cartilage edges. This structural design ensures the compatibility of the adsorption component 20 with the graft, and through the combination of the curved adsorption surface and the central adsorption hole, maximizes the protection of the graft's structural integrity, solving the edge damage problem caused by traditional blade peeling or clamping.

[0034] In addition, as an alternative, the adsorption surface of the adsorption component 20 disclosed herein can be flat, for adapting to grafts with smooth cartilage surfaces; alternatively, the adsorption component 20 may have an adsorption surface with a flexible silicone pad to enhance fit and suit slightly irregular cartilage surfaces. Without changing the core negative pressure adsorption principle, the applicability is expanded by adapting the adsorption surface shape to different cartilage surface conditions. It should be noted that while an adsorption surface with a flexible silicone pad can improve fit, the flexible silicone pad may have a limited number of times it can withstand high-temperature and high-pressure sterilization. In clinical use, the appropriate type of adsorption component 20 can be selected according to sterilization requirements.

[0035] In one embodiment of this disclosure, such as Figure 2 As shown, a connector 70 is provided at one end of the adsorption sleeve 10, and the connector 70 is threadedly connected to the adsorption sleeve 10. An opening is provided on the connector 70. The adsorption assembly 20 communicates with the opening via an adapter 80. Preferably, the connector 70 is 11mm long, with external threads on its outer wall, and internal threads on the corresponding end of the adsorption sleeve 10. The two are connected by threads, enhancing the sealing and stability of the connection. An opening is provided at the center of the connector 70, and the inner diameter of the opening matches the outer diameter of the adapter 80, ensuring a tight fit between the adapter 80 and the opening. The advantages of this design are that the threaded connection between the connector 70 and the adsorption sleeve 10 is easy to disassemble. When it is necessary to clean the inside of the adsorption sleeve 10 or replace the adapter 80, the connector 70 can be quickly unscrewed, making operation convenient. At the same time, the connector 70 makes the connection between the adsorption assembly 20 and the adsorption sleeve 10 more flexible. Different types of adapters 80 and adsorption assemblies 20 can be adapted by replacing different specifications of the connector 70, expanding the applicability of the device and improving its versatility.

[0036] In one embodiment of this disclosure, such as Figure 2 As shown, the adapter 80 is connected to an open thread, and an annular groove is provided at the position where the adapter 80 exposes the opening. The adsorption component 20 is engaged in the annular groove. Specifically, in conjunction with... Figure 7 and Figure 8 One end of the adapter 80 has an external thread that matches the internal thread at the opening of the connector 70. This threaded connection ensures a tight seal between the adapter 80 and the connector 70, preventing negative pressure leakage. The exposed portion of the adapter 80 has an annular groove whose width precisely matches the thickness of the engaging end of the adsorption component 20. When the adsorption component 20 engages within the annular groove, it effectively prevents it from falling off. The advantages of this design are that the threaded adapter 80 ensures a tight seal for negative pressure transmission, while the engaging connection facilitates quick replacement of the adsorption component 20. The surgeon can quickly replace the corresponding adsorption component 20 during surgery according to the required graft diameter, without the need for additional tools, thus saving surgical time.

[0037] To achieve the negative pressure adsorption and release function of the adsorption component 20, the structural design of the operating rod 30 is particularly crucial. The two opposite ends of the operating rod 30 are respectively referred to as the first end extending into the inner cavity and the second end located outside the inner cavity. The length of the operating rod 30 is designed to match the inner cavity length of the adsorption sleeve 10, and the main body is made of 1216L medical-grade stainless steel to meet the sterility requirements of surgical procedures and the need for reusability.

[0038] Continue to refer to Figure 2 The operating lever 30 has a piston head 40 at its first end that mates with the inner wall of the cavity, and a pressing part 50 at its second end. The outer diameter of the piston head 40 precisely matches the inner diameter of the cavity and can be made of medical-grade fluororubber. The pressing part 50 at the second end of the operating lever 30 is a non-slip cylindrical button (20mm in diameter), ergonomically designed to fit the curvature of the surgeon's hand, increasing the contact area during gripping, dispersing hand pressure, and reducing hand fatigue caused by prolonged surgery. The surface of the pressing part 50 also features non-slip textures to improve grip stability and prevent instrument displacement due to hand slippage during surgery. The pressing part 50 also has a high-temperature laser-engraved disinfection label in the center, facilitating medical staff to record the number of times the instrument has been disinfected, ensuring that the instrument meets sterility standards before each use, thus solving the problem of the lack of disinfection traceability labels for existing adsorption instruments.

[0039] In one embodiment of this disclosure, such as Figure 3 As shown, the outer wall of the piston head 40 is provided with a first annular groove 41 and a second annular groove 42 distributed along its axial direction. A first sealing ring 401 that mates with the inner wall is disposed in the first annular groove 41, and a second sealing ring 402 that mates with the inner wall is disposed in the second annular groove 42. The first annular groove 41 and the second annular groove 42 are distributed along the axial direction of the piston head 40, ensuring that the two sealing rings can form independent sealing areas. Both the first sealing ring 401 and the second sealing ring 402 are made of medical-grade fluororubber, which has excellent elasticity, corrosion resistance, and sterilization resistance, and can withstand more than a thousand high-pressure steam sterilizations without any decrease in sealing performance. The beneficial effect of the double sealing design is that, compared with a single sealing ring, it significantly improves the sealing performance between the piston head 40 and the inner wall of the cavity. Even if one sealing ring experiences slight wear, the other sealing ring can still ensure the sealing performance of the cavity, effectively preventing negative pressure leakage and ensuring the stability of the adsorption force. At the same time, the sterilization resistance of the fluororubber material extends the service life of the sealing rings and reduces the consumable cost of the device.

[0040] In one embodiment of this disclosure, reference continues to be made to... Figure 3The first sealing ring 401 is disposed on the side of the piston head 40 adjacent to the adsorption component 20, and the second sealing ring 402 is disposed on the side of the piston head 40 away from the adsorption component 20. In its natural state, the surface of the first sealing ring 401 that mates with the inner wall is flat, while the surface of the second sealing ring 402 that mates with the inner wall is curved. Specifically, the flat design of the first sealing ring 401 allows it to form surface contact with the inner wall of the cavity during adsorption, increasing the sealing contact area, enhancing the sealing effect, and preventing gas leakage caused by negative pressure during graft adsorption. The curved design of the second sealing ring 402 allows it to form line contact with the inner wall of the cavity during adsorption. When the piston head 40 reciprocates, it reduces frictional resistance with the inner wall of the cavity, making the movement of the piston head 40 smoother. Simultaneously, the curved surface has a self-compensating function; when the inner wall of the cavity experiences slight wear due to long-term use, the elastic deformation of the curved surface can automatically compensate for the sealing gap, ensuring that the sealing performance is not affected. The beneficial effect of this design is that by combining two sealing rings with different surface morphologies, it balances sealing reliability and smooth movement, ensuring the stability of negative pressure adsorption while improving the operator's feel and reducing operational resistance during surgery. Furthermore, because the operating rod 30 of this disclosure has a relatively long length, its movement within the adsorption sleeve 10 is relatively long. To ensure the coaxiality of the piston head 40 and the operating rod 30 during movement within the adsorption sleeve 10, a first sealing ring 401 and a second sealing ring 402 are provided. The first sealing ring 401 and the second sealing ring 402 are arranged at intervals in their direction of movement, and the arc-shaped second sealing ring 402 is positioned on the side away from the adsorption assembly 20, i.e., it is in line contact with the inner wall of the adsorption sleeve 10, which can effectively guide and maintain the coaxial movement of the piston head 40.

[0041] An elastic device 60 is provided between the operating rod 30 and the adsorption sleeve 10. When the operating rod 30 is subjected to an external force, it overcomes the elastic force of the elastic device 60, causing the piston head 40 to move towards one side of the adsorption assembly 20; and when the external force is removed, under the restoring force of the elastic device 60, it causes the piston head 40 to move away from the adsorption assembly 20. Specifically, as shown... Figure 2 As shown, when the operator presses the pressing part 50 (second end) of the operating rod 30, the operating rod 30 drives the piston head 40 to move towards the adsorption assembly 20, compressing the elastic device 60 and storing elastic potential energy, thus reducing the internal volume. When the operator releases the pressing force, the elastic device 60 releases the elastic potential energy, pushing the piston head 40 away from the adsorption assembly 20, increasing the internal volume and creating a negative pressure at the adsorption hole, thereby achieving the adsorption of the osteocartilage graft. Preferably, the elastic force of the elastic device 60 is precisely calibrated to ensure that the piston head 40 can generate an adsorption force of 0-5N (corresponding to a negative pressure of approximately 10N) when it returns to its original position. - ³ to 10 -6Pa) is suitable for osteocartilage grafts of different weights (0.5-5g) to avoid graft detachment due to insufficient adsorption force, while preventing damage to the cartilage layer due to excessive adsorption force.

[0042] Optionally, in addition to using a spring 61, the elastic device 60 can also use an elastic rubber sleeve. This elastic rubber sleeve is fitted at the connection between the operating rod 30 and the adsorption sleeve 10, and the piston head 40 is reset by utilizing the elastic deformation of the rubber material. The elastic rubber sleeve is made of medical-grade sterile-resistant rubber, which can withstand multiple high-pressure steam sterilizations without aging or deformation. Its structural design does not require additional limiting clips, and the movement range of the piston head 40 is limited by the elastic limit of the rubber itself. It has the advantages of simple structure and convenient assembly. At the same time, the cushioning effect of the rubber material can reduce the impact force when the piston head 40 moves, improving the operating feel. However, its elastic recovery force stability is slightly lower than that of the spring 61, making it suitable for clinical scenarios where the accuracy of adsorption force adjustment is not high.

[0043] In one embodiment of this disclosure, such as Figure 2 As shown, a first stop 11 is provided on the inner wall of the inner cavity, a second stop 12 is provided on the operating rod 30, and the elastic device 60 is a spring 61 sleeved on the operating rod 30. One end of the spring 61 abuts against the first stop 11, and the other end abuts against the second stop 12.

[0044] Specifically, both the first stop 11 and the second stop 12 are made of 1216L medical-grade stainless steel, consistent with the material of the adsorption sleeve 10 and the operating rod 30, ensuring the overall corrosion resistance and structural compatibility of the device. The first stop 11 is fixedly positioned at a predetermined location on the inner wall of the cavity, and its end face is flattened to ensure full contact with the end face of the spring 61; the second stop 12 is fixed at the corresponding position on the operating rod 30, similarly ensuring tight contact with the end face of the spring 61. The length and wire diameter of the spring 61 are precisely calculated, and its elastic coefficient matches the adsorption requirements of the osteocartilage graft. When the operating rod 30 moves the second stop 12, the spring 61 compresses and rebounds through contact with the two stops, thereby driving the piston head 40 to move precisely. The beneficial effect of this design is that, through the limiting effect of the first stop 11 and the second stop 12 on the spring 61, it ensures that the spring 61 is always subjected to force along the axial direction of the operating rod 30, avoids the movement jamming caused by the lateral displacement of the spring 61, improves the stability and reliability of the elastic device 60, and facilitates the disassembly and replacement of the spring 61, reducing the maintenance cost of the instrument.

[0045] In one embodiment of this disclosure, the operating rod 30 is provided with an external thread, and the second stop 12 is threadedly connected to the operating rod 30. The second stop 12 has an internal thread, the inner diameter of which is precisely matched with the external thread size of the operating rod 30, enhancing the stability of the connection and the adjustment accuracy. Optionally, by rotating the second stop 12, its axial position on the operating rod 30 can be adjusted, thereby changing the initial compression of the spring 61 and achieving pre-adjustment of the suction force. For example, for heavier grafts, the second stop 12 can be rotated towards the first stop 11 to increase the initial compression of the spring 61, so that the spring 61 generates a greater suction force when it rebounds; for lighter grafts, the second stop 12 can be rotated in the opposite direction to reduce the initial compression of the spring 61, avoiding excessive suction force that could damage the cartilage. The beneficial effect of this threaded connection design is that it enables personalized adjustment of the suction force and improves the versatility of the device.

[0046] In one embodiment of this disclosure, such as Figure 2 As shown, a screw 121 is provided on the second stop part 12, which fixes the second stop part 12 to the operating rod 30. Optionally, the second stop part 12 has a threaded hole adapted to the screw 121, and the operating rod 30 has multiple evenly distributed positioning holes at corresponding positions. The spacing of the positioning holes is designed according to the gradient of the suction force adjustment. When the second stop part 12 is adjusted to the preset position, the screw 121 is passed through the threaded hole and screwed into the corresponding positioning hole to fix the second stop part 12 to the operating rod 30. Fixing the second stop part 12 to the operating rod 30 with the screw 121 adds mechanical fixing limit compared to a simple threaded connection, further improving the fixing reliability of the second stop part 12 and avoiding thread wear and loosening caused by long-term use or frequent adjustment. At the same time, the design of multiple positioning holes provides a clear gradient option for suction force adjustment, making it easy for the operator to quickly and accurately set the required suction force and reducing the difficulty of operation.

[0047] In one embodiment of this disclosure, such as Figure 4 and Figure 5As shown, the first stop portion 11 includes an expansion sleeve 32 and a motion mechanism 33 located within the expansion sleeve 32. The motion mechanism 33 moves axially relative to the expansion sleeve 32 to expand the expansion sleeve 32 to an interference fit with the inner wall of the cavity. The expansion sleeve 32 is made of medical-grade stainless steel with good elasticity, and its outer wall may be provided with evenly distributed anti-slip textures. The length of the expansion sleeve 32 is adapted to the inner diameter of the cavity to ensure that it can form a sufficient interference fit with the inner wall of the cavity after expansion. The motion mechanism 33 is located inside the expansion sleeve 32. Through its axial movement, it pushes the inner wall of the expansion sleeve 32, causing the expansion sleeve 32 to expand radially and thus fit tightly against the inner wall of the cavity, thereby fixing the first stop portion 11. The beneficial effect of this design is that it eliminates the need for additional processing and fixing structures on the inner wall of the suction sleeve 10. The first stop part 11 can be quickly installed and positioned by expanding the expansion sleeve 32, which can adapt to suction sleeves 10 with different inner diameter specifications, thus expanding the range of instrument compatibility. At the same time, the anti-slip texture can enhance the friction between the first stop part 11 and the inner wall of the cavity, preventing the first stop part 11 from shifting due to the impact force generated by the movement of the piston head 40 during surgery, and ensuring the stability of the elastic device 60.

[0048] In one embodiment of this disclosure, reference continues to be made to... Figure 4 and Figure 5 The inner wall of the expansion sleeve 32 is conical; the motion mechanism 33 includes a nut 34 located inside the expansion sleeve 32 and having a conical outer wall, and a bolt 35 that cooperates with the nut 34. The bolt 35 drives the nut 34 to move inside the expansion sleeve 32, so that the outer wall of the nut 34 pushes the inner wall of the expansion sleeve 32 to expand.

[0049] Specifically, the outer wall of the expansion sleeve 32 can be an arc-shaped surface that matches the shape of the inner wall of the adsorption sleeve 10. The taper of the inner wall of the expansion sleeve 32 is consistent with the taper of the outer wall of the nut 34, ensuring that the radial force can be uniformly transmitted to the expansion sleeve 32 when the nut 34 moves. The nut 34 is inserted from the side with the larger opening of the expansion sleeve 32, and the bolt 35 is screwed into the nut 34 from the side with the smaller opening of the expansion sleeve 32. When the bolt 35 is screwed into the nut 34, the nut 34 can move towards the side with the smaller opening of the expansion sleeve 32. Due to the guiding effect of the tapered surface, the outer wall of the nut 34 will generate a uniform radial thrust on the inner wall of the expansion sleeve 32, causing the expansion sleeve 32 to expand radially and fit tightly against the inner wall of the cavity, thereby fixing the first stop part 11 to the inner wall of the adsorption sleeve 10.

[0050] This disclosed osteocartilage syringe-type adsorption pen borrows from the "piston-chamber" principle of a syringe, using the reciprocating motion of the piston to regulate the negative pressure within the chamber, thereby achieving the adsorption and release of the implant. The integrated handheld device features an adsorption head at the front, an operating rod 30 in the middle, and a pressing part 50 at the rear, combining comfortable grip with precise operation. In a preferred embodiment, the total length of the osteocartilage syringe-type adsorption pen is 222mm, with the adsorption component 20 being 7mm long, the adapter 80 11mm long, the operating rod 30 170mm long, and the adsorption sleeve 10 having an inner diameter of 9mm. Furthermore, the osteocartilage syringe-type adsorption pen also has a handle structure, which is propeller-shaped, 70mm long, with a maximum width of 20mm and a minimum width of 10mm. A guide sleeve adapted to the operating rod 30 can be installed inside the handle to ensure coaxiality of movement with the operating rod 30 and prevent misalignment leading to air leakage. The gap between the guide sleeve and the operating rod 30 is ≤0.2mm, balancing smooth movement and sealing. Except for the optional replaceable disposable suction cup of the adsorption component 20, the rest of the structure can be sterilized using high-temperature, high-pressure steam sterilization. This solves the problem that existing adsorption instruments, mostly made of plastics and rubber, are not resistant to high-pressure sterilization and cannot be reused, thus meeting the aseptic requirements of surgical procedures. Existing structures are not suitable for surgical operations. The osteocartilage syringe-type adsorption pen disclosed in this invention solves the problem of insufficient adsorption force in existing instruments, preventing them from falling off due to insufficient adsorption force. Furthermore, the main body of the instrument disclosed in this invention is made of 1216L medical-grade stainless steel, with some alternatives using titanium alloy, ensuring both structural strength and sterilization resistance while allowing for flexible selection based on clinical needs.

[0051] This invention is compatible with existing orthopedic instruments. The osteocartilage syringe-type suction pen can be used with existing osteocartilage graft trephines, oscillating saws, and other instruments without altering the existing surgical procedure, only replacing the "blade dissection" step, facilitating clinical application. Its integrated "acquisition-transplantation" design enables completely contactless transfer of osteocartilage grafts from the donor site to the recipient site, reducing the number of instrument changes and lowering the risk of graft contamination. Furthermore, it is simple to operate, requiring a low technical skill threshold for the surgeon; even beginners can quickly learn to use it, reducing operational errors due to lack of experience, shortening surgical time, and improving surgical efficiency and transplant success rate.

[0052] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of this disclosure is defined by the appended claims.

Claims

1. A bone cartilage syringe-type absorbent pen, characterized in that, include: An adsorption sleeve (10) having an inner cavity; An adsorption component (20) is connected to one end of the adsorption sleeve (10) and is configured to have an adsorption hole communicating with the inner cavity; the front end face of the adsorption component (20) is configured as an arc-shaped adsorption surface. An operating lever (30) has two opposite ends, referred to as a first end extending into the inner cavity and a second end located outside the inner cavity. The first end of the operating lever (30) is provided with a piston head (40) that cooperates with the inner wall of the inner cavity, and the second end is configured to be provided with a pressing part (50). An elastic device (60) is provided between the operating lever (30) and the adsorption sleeve (10). The operating lever (30) is configured to overcome the elastic force of the elastic device (60) when subjected to external force, and drive the piston head (40) to move toward one side of the adsorption assembly (20). When the external force is removed, under the action of the restoring force of the elastic device (60), the piston head (40) is driven to move away from the adsorption assembly (20).

2. The osteocartilage syringe-type absorbent pen according to claim 1, characterized in that, A first stop (11) is provided on the inner wall of the inner cavity, and a second stop (12) is provided on the operating rod (30). The elastic device (60) is a spring (61) sleeved on the operating rod (30). One end of the spring (61) is configured to abut against the first stop (11), and the other end is configured to abut against the second stop (12).

3. The osteocartilage syringe-type absorbent pen according to claim 2, characterized in that, The operating lever (30) is provided with an external thread, and the second stop (12) is configured to be threadedly connected to the operating lever (30).

4. The osteocartilage syringe-type absorbent pen according to claim 3, characterized in that, The second stop (12) is provided with a screw (121) configured to fix the second stop (12) to the operating lever (30).

5. The osteocartilage syringe-type absorbent pen according to claim 2, characterized in that, The first stop (11) includes an expansion sleeve (32) and a motion mechanism (33) located within the expansion sleeve (32), the motion mechanism (33) being configured to move axially relative to the expansion sleeve (32) to cause the expansion sleeve (32) to expand to an interference fit with the inner wall of the inner cavity.

6. The osteocartilage syringe-type absorbent pen according to claim 5, characterized in that, The inner wall of the expansion sleeve (32) is constructed to be conical; the motion mechanism (33) includes a nut (34) located inside the expansion sleeve (32) and whose outer wall is constructed to be conical, and a bolt (35) cooperating with the nut (34), the bolt (35) being constructed to drive the nut (34) to move inside the expansion sleeve (32) so that the outer wall of the nut (34) pushes the inner wall of the expansion sleeve (32) to expand.

7. The osteocartilage syringe-type absorbent pen according to claim 1, characterized in that, The piston head (40) has a first annular groove (41) and a second annular groove (42) distributed along its axial direction on its outer wall. A first sealing ring (401) that mates with the inner wall is provided in the first annular groove (41), and a second sealing ring (402) that mates with the inner wall is provided in the second annular groove (42).

8. The osteocartilage syringe-type absorbent pen according to claim 7, characterized in that, The first sealing ring (401) is configured to be disposed on the piston head (40) adjacent to the adsorption assembly (20), and the second sealing ring (402) is configured to be disposed on the piston head (40) away from the adsorption assembly (20); wherein, in its natural state, the surface of the first sealing ring (401) that mates with the inner wall is a plane, and in its natural state, the surface of the second sealing ring (402) that mates with the inner wall is an arc-shaped surface.

9. The osteocartilage syringe-type absorbent pen according to claim 1, characterized in that, One end of the adsorption sleeve (10) is provided with a connector (70), which is configured to be threadedly connected to the adsorption sleeve (10); the connector (70) is provided with an opening; the adsorption assembly (20) is configured to communicate with the opening through an adapter (80).

10. The osteocartilage syringe-type absorbent pen according to claim 9, characterized in that, The adapter (80) is configured to be threadedly connected to the opening, and an annular groove is provided at the position where the adapter (80) exposes the opening. The adsorption assembly (20) is configured to engage in the annular groove.

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