Marrow expanding, lavage and suction bone grafting device

Abstract

The invention relates to the technical field of medical instruments, and discloses a reaming lavage suction bone grafting device which comprises a handheld power operation body, a reaming drill rod connected to the output end of the handheld power operation body, an auxiliary grip arranged on the reaming drill rod in a sleeving mode and a collecting mechanism. The collecting mechanism is used for collecting bone scraps generated in the marrow expanding process and comprises an outer shell, a sealing cover detachably installed at the top of the outer shell, a filter cartridge installed in the outer shell and an inner collector arranged in the filter cartridge, and the sealing cover is connected with a liquid outlet pipeline of the auxiliary grip; the inner collector comprises a top cap positioned at the top of the filter cartridge and a collecting bottom plate arranged at the bottom of the filter cartridge. The elastic reset piece is arranged on the top cap of the inner collector, so that the inner collector is automatically ejected out of the outer shell when the sealing cover is taken down after an operation is completed, the bone chip collecting unit can be conveniently, hygienically and integrally taken and placed, and the problems that a tool is needed for taking out bone chips and the bone chips are prone to scattering in a traditional device are solved.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to a bone grafting device for reaming, irrigation, aspiration, and bone grafting. Background Technology

[0002] In orthopedic clinics, autologous bone grafting is widely recognized as the preferred standard treatment for bone defect repair, nonunion fractures, and spinal fusion surgery due to its advantages such as no immune rejection and excellent osteoconductivity and osteoinductive properties. Traditional autologous bone harvesting methods often rely on iliac crest bone harvesting, but this procedure has complications such as donor site pain, hematoma formation, and infection, and the amount of bone harvested is limited, making it difficult to meet the needs of repairing large bone defects.

[0003] To address this issue, a bone grafting device for reaming, irrigation, and aspiration has been developed. This device uses autologous bone fragments generated during the reaming process to replace bone harvesting from the iliac bone, avoiding donor site damage and simultaneously performing medullary canal reaming, irrigation, debridement, and autologous bone collection, significantly simplifying the surgical procedure. However, existing reaming, irrigation, and aspiration devices primarily use filters to collect bone fragments. After reaming, the bone fragments are mainly retained at the bottom of the filter cartridge. After surgery, due to the narrow space inside the filter cartridge, the surgeon must use forceps or directly pour the fluid to remove the bone fragments, which is extremely inconvenient. Furthermore, the bone fragments are prone to scattering during removal, causing contamination of the surgical environment. Summary of the Invention

[0004] The purpose of this invention is to provide a bone marrow lavage and aspiration device for bone grafting to solve the aforementioned technical problems.

[0005] The present invention solves the above-mentioned technical problems through the following technical solutions: This invention provides a reaming irrigation and aspiration bone grafting device, comprising: a handheld power operating body, a reaming drill rod connected to the output end of the handheld power operating body, an auxiliary handle sleeved on the reaming drill rod, and a collection mechanism; The collection mechanism is used to collect bone fragments generated during the reaming process. It includes an outer shell, a detachable sealing cap installed on the top of the outer shell, a filter cartridge installed inside the outer shell, and an inner collector located inside the filter cartridge. The sealing cap is connected to the liquid outlet pipe of the auxiliary handle. The inner collector includes a top cap located at the top of the filter cylinder and a collection base plate located at the bottom of the filter cylinder. The collection base plate and the top cap are connected by a quick-release connector, and the bottom of the top cap is provided with an elastic reset member. The resilient reset member is configured such that when the sealing cap is connected to the outer casing, it is compressed and stores energy; when the sealing cap is removed from the outer casing, it releases its elasticity and pushes the inner collector upward, so that the inner collector is at least partially exposed to the outer casing.

[0006] Preferably, there are two connectors, which are symmetrically arranged on the edges of the bottom of the top cap.

[0007] Preferably, the connector includes an upper connector fixedly installed at the bottom of the top cap and a lower connector fixedly installed at the top of the collecting base plate, and the upper connector and the lower connector are connected by a quick-release structure.

[0008] Preferably, the quick-release structure includes a buckle installed at the bottom of the upper connector and a slot located at the top of the lower connector and adapted to the buckle.

[0009] Preferably, the outer edge of the collecting base plate is made of a flexible material, and its outer edge is interference-fitted with the inner wall of the filter cylinder.

[0010] Preferably, the filter cylinder has a docking hole at the bottom, and the collecting base plate has a flange at the bottom that matches the docking hole.

[0011] Preferably, the top surface of the collecting base plate is provided with a downwardly recessed collecting groove, and the bottom surface of the collecting base plate is provided with a filter hole communicating with the collecting groove.

[0012] Preferably, there are two elastic reset members, which are symmetrically arranged on both sides of the bottom of the top cap.

[0013] Preferably, the elastic reset member includes a telescopic shaft slidably disposed on the top cap, and a spring is provided between the telescopic shaft and the top cap; the lower end of the telescopic shaft is used to insert into the docking groove at the top of the filter cylinder.

[0014] Preferably, the top of the filter cylinder is provided with two docking grooves that are adapted to the telescopic shaft.

[0015] The beneficial effects of this invention are as follows: This invention, by setting an elastic reset element on the top cap of the inner collector, enables the inner collector to be automatically pushed out of the outer shell when the sealing cap is removed after surgery. This allows the bone fragment collection unit to be conveniently and hygienically removed and placed as a whole, solving the problems of traditional devices that require tools to remove the bone fragments and that bone fragments are easy to scatter. Meanwhile, the design of a quick-detachable connector between the cap and the collection base allows the collection base containing bone fragments to be rapidly separated and directly transferred to the storage container, achieving a seamless connection between the collection and storage processes, improving surgical efficiency, and reducing the risk of contamination. These two improvements work synergistically to optimize the intraoperative experience and the handling process of autologous bone graft materials, while ensuring stable and efficient collection of bone fragments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a bone grafting and irrigation device according to the present invention; Figure 2 This is a schematic diagram of the internal structure of the collection mechanism in the bone grafting and irrigation device of the present invention; Figure 3 This is a schematic diagram of a partial location of the collection mechanism in a bone grafting and irrigation device of the present invention; Figure 4 This is the present invention. Figure 2 Enlarged diagram of section A in the middle; Figure 5 This is an exploded view of the collection mechanism in the bone grafting and irrigation device of the present invention; Figure 6 This is a schematic diagram of the internal collector in a bone grafting and irrigation device of the present invention; Figure 7 This is a schematic diagram of a partial location of the connector in a bone grafting and irrigation device of the present invention.

[0017] In the diagram: 10. Handheld power operating unit; 20. Reamer rod; 30. Auxiliary handle; 40. Collection mechanism; 401. Outer shell; 402. Sealing cap; 403. Filter cartridge; 4031. Docking hole; 4032. Docking groove; 404. Inner collector; 4041. Top cap; 4042. Collection base plate; 4043. Upper connector; 4044. Lower connector; 4045. Buckle; 4046. Slot; 4047. Collection groove; 4048. Telescopic shaft; 4049. Spring. Detailed Implementation

[0018] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0019] Please refer to the following: Figures 1 to 7 A bone grafting device for reaming, irrigation, and aspiration is mainly used in orthopedic surgery to simultaneously perform medullary cavity reaming, irrigation, debridement, and collection of autologous bone fragments. The device comprises a handheld power manipulator 10, a reaming drill rod 20 connected to the output end of the handheld power manipulator 10, an auxiliary handle 30 sleeved on the reaming drill rod 20, and a collection mechanism 40 for collecting bone fragments.

[0020] The handheld power manipulator 10 is a common medical power tool in the prior art, providing rotational power. The front end of the reamer 20 is equipped with a reamer head for cutting bone tissue. The auxiliary handle 30 is fixedly sleeved on the reamer 20, providing the operator with additional gripping points for stable operation; the auxiliary handle 30 integrates an inlet tube and an outlet tube; the inlet tube is connected to an external irrigation fluid source for injecting irrigation fluid into the surgical area during reaming, serving to cool and clean the wound; the outlet tube is used to aspirate the irrigation fluid mixture containing bone debris (i.e., the contents of the medullary cavity) and drain it to the collection mechanism 40.

[0021] The collection mechanism 40 is the core improvement of the present invention, which is used to efficiently and cleanly collect and temporarily store bone fragments transported from the liquid outlet pipeline; the mechanism includes an outer shell 401, a sealing cap 402, a filter cartridge 403, and an inner collector 404.

[0022] The outer casing 401 is generally cylindrical with an opening at the top; the sealing cap 402 is detachably mounted on the top of the outer casing 401, for example, by a threaded connection or a snap-fit ​​4045. The sealing cap 402 has an inlet connector at its center, which is connected to the outlet pipe of the auxiliary handle 30 via a pipe, allowing the irrigation fluid containing bone fragments to flow into the collection mechanism 40.

[0023] The filter cartridge 403 is installed inside the outer casing 401, and a gap can be left between its outer wall and the inner wall of the outer casing 401 for liquid flow; the side wall of the filter cartridge 403 is provided with dense filter holes, the pore size of which allows liquid to pass through but can trap bone fragments; the top of the filter cartridge 403 is open, and the outer edge is provided with a ring for easy hand gripping and handling.

[0024] The inner collector 404 is located inside the filter cartridge 403 and is used to directly collect the filtered bone fragments; it consists of three main parts: a top cap 4041 located at the top of the filter cartridge 403, a collection base plate 4042 located at the bottom of the filter cartridge 403, and a connector that can be quickly detached and connected together.

[0025] The top cap 4041 is typically made of rigid plastic and has a diameter larger than the top opening of the filter cartridge 403, allowing the bottom of the top cap 4041 to fit snugly against the top of the filter cartridge 403. The bottom of the top cap 4041 is provided with an elastic reset element. In this embodiment, the elastic reset element is preferably an elastic telescopic structure, specifically including a vertically extending telescopic shaft 4048 and a spring 4049 located between the telescopic shaft 4048 and the top cap 4041. When subjected to downward pressure, the telescopic shaft 4048 can slide upward relative to the top cap 4041, compressing the spring 4049 to store elastic potential energy; when the pressure is released, the spring 4049 pushes the telescopic shaft 4048 downward to reset.

[0026] The number of elastic reset members can be set to two and symmetrically arranged on both sides of the bottom of the top cap 4041 to provide a balanced and stable ejection force. Each elastic reset member includes a telescopic shaft 4048 and a spring 4049 as described above.

[0027] At the top of the filter cylinder 403, corresponding to the positions of the two telescopic shafts 4048, two docking slots 4032 are provided. When the inner collector 404 is placed into the filter cylinder 403 and the sealing cap 402 is not pressed tightly, the lower end of the telescopic shaft 4048 tends to extend downward under the initial elastic force of the spring 4049. During placement, the lower end of the telescopic shaft 4048 will naturally insert into or align with these docking slots 4032. When the sealing cap 402 presses against the top cap 4041, the telescopic shaft 4048 moves upward relative to the top cap 4041, but its lower end always maintains contact with the bottom or side wall of the docking slot 4032. This insertion and docking design not only provides a clear force fulcrum for the compression of the elastic reset component, ensuring the effective storage of elastic potential energy, but also plays a certain role in limiting the circumferential rotation of the inner collector 404 within the filter cylinder 403, making its structure more stable.

[0028] The function of the elastic repositioning member is specifically configured as follows: when the sealing cap 402 is installed on the outer shell 401 and tightened or locked, the inner side of the sealing cap 402 presses against the top cap 4041, forcing the entire inner collector 404 to move downward. At this time, the elastic repositioning member (lower end of the telescopic shaft 4048) abuts against the top of the filter cylinder 403 or a limiting structure inside the outer shell 401, thereby being compressed and storing energy, and the inner collector 404 is stably positioned at the bottom working position of the filter cylinder 403. When the surgery is completed and bone fragments need to be removed, the surgeon only needs to remove the sealing cap 402 from the outer shell 401. Once the pressure of the sealing cap 402 is released, the compressed elastic repositioning member (spring 4049) immediately releases its stored elastic force, pushes the top cap 4041 upward, and then lifts the entire inner collector 404 upward, so that at least a part of it (especially the top cap 4041) is exposed outside the top opening of the outer shell 401. This design allows the operator to easily and directly pinch the exposed top cap 4041 with their fingers to completely remove the entire inner collector 404 from the outer shell 401, making the operation more convenient and eliminating the risk of bone fragments scattering.

[0029] The collection base plate 4042 is used to directly hold bone fragments. A connector connects the top cap 4041 and the collection base plate 4042. To enable quick and individual disassembly of the collection base plate 4042, the connector is designed as a quick-release structure. For example, the connector may include an upper connector 4043 fixed to the bottom of the top cap 4041 and a lower connector 4044 fixed to the top of the collection base plate 4042, connected by a quick-release structure such as a snap-fit ​​4045, a button, a magnetic closure, or a threaded quick-release mechanism. As a preferred embodiment, the quick-release structure may include a snap-fit ​​4045 located at the bottom of the upper connector 4043 and a slot 4046 located at the top of the lower connector 4044 that mates with the snap-fit ​​4045, which can be locked and released by pressing or rotating.

[0030] The outer edge of the collecting base plate 4042 is made of a flexible material such as silicone. When the inner collector 404 is placed inside the filter cartridge 403, the flexible outer edge forms an interference fit with the inner wall of the filter cartridge 403. This design provides a good seal, ensuring that the irrigation fluid containing bone fragments must pass through the filtration structure on the collecting base plate 4042 when it flows in, without leaking from its edges, thus ensuring that all bone fragments are collected on the collecting base plate 4042.

[0031] Furthermore, a docking hole 4031 may be provided at the center of the bottom of the filter cylinder 403. Correspondingly, a downwardly protruding flange is provided at the center of the bottom of the collecting base plate 4042. When the inner collector 404 is placed in position, the flange can be inserted into the docking hole 4031 at the bottom of the filter cylinder 403. This concave-convex docking structure plays a role in radial positioning and auxiliary axial fixation, which can prevent the collecting base plate 4042 from shaking or deflecting inside the filter cylinder 403, ensuring that it is always in the correct position, making the collection of bone fragments more stable and reliable.

[0032] In addition, the top surface of the collection base plate 4042 may be provided with a downwardly recessed collection groove 4047. This collection groove 4047 can better collect and contain bone fragments, preventing them from spreading on the surface of the base plate; the bottom surface of the collection base plate 4042 is provided with multiple evenly distributed filter holes, which are connected to the collection groove 4047. The pore size is designed to allow irrigation fluid and small particulate impurities to pass through, but can effectively retain bone fragments that can be used for transplantation. This structure achieves preliminary liquid-solid separation of the collected material.

[0033] The quick-release design offers another significant advantage: once the inner collector 404 is removed as a whole, the surgeon can easily manipulate the quick-release structure to separate the upper connector 4043 from the lower connector 4044. In this way, the collection base plate 4042 and the lower connector 4044, containing bone fragments, can be placed directly into a sterile bone fragment storage container (such as a sterile cup) for temporary storage or subsequent processing, acting as an independent unit. The relatively clean top cap 4041 and the upper connector 4043 can be discarded or disposed of separately, avoiding cross-contamination, greatly simplifying the surgical procedure, and improving efficiency.

[0034] The procedure for using the bone marrow lavage and aspiration bone grafting device of the present invention is as follows: The handheld power operating unit 10 drives the reaming drill rod 20 to ream the medulla. Irrigation fluid is injected through the inlet pipe. The contents of the medulla cavity mixed with bone fragments are aspirated and sent to the collection mechanism 40 through the outlet pipe. The liquid flows out through the filter holes of the filter cylinder 403 and the bottom plate of the inner collector 404, while the bone fragments are trapped in the collection groove 4047 of the collection bottom plate 4042. After the surgery, after removing the sealing cap 402, the built-in elastic reset component automatically pushes the inner collector 404 out of the outer shell 401, realizing the automatic pop-out of the bone fragment collection unit. The picking and putting operation is extremely simple and hygienic. If further temporary storage of bone fragments is required, the surgeon can instantly separate the collection plate 4042 containing bone fragments using a quick-detachable connector and transfer it directly to the storage container. This seamless process greatly improves surgical efficiency and reduces the risk of contamination.

[0035] The embodiments of the present invention have been described above, but the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention, all of which are within the protection scope of the present invention.

Claims

1. A reaming, irrigating, aspirating, and bone grafting device, comprising: The utility model relates to a bone marrow expansion drill rod auxiliary handle and collection mechanism, comprising: The collection mechanism is used for collecting bone chips generated in the marrow expansion process, and comprises an outer shell, a sealing cover detachably installed on the top of the outer shell, a filter cartridge installed in the outer shell, and an inner collector arranged in the filter cartridge, wherein the sealing cover is connected with the liquid outlet pipeline of the auxiliary handle; The inner collector comprises a top cap located at the top of the filter cartridge and a collection bottom plate arranged at the bottom of the filter cartridge, and the collection bottom plate is connected with the top cap through a quick detachable connecting piece, and the bottom of the top cap is provided with an elastic reset piece; The elastic reset piece is configured to be compressed and stored with energy when the sealing cover is connected with the outer shell, and to release elastic force and push the inner collector upward when the sealing cover is removed from the outer shell, so that the inner collector is at least partially exposed to the outer shell. The number of connecting pieces is two, and the two connecting pieces are symmetrically arranged on the edges of the bottom of the top cap.

2. The reaming, irrigating, aspirating, and bone grafting device of claim 1, wherein, The connecting piece comprises an upper connecting body fixedly installed on the bottom of the top cap and a lower connecting body fixedly installed on the top of the collection bottom plate, and the upper connecting body and the lower connecting body are connected through a quick release structure.

3. The reaming, irrigating, aspirating, and bone grafting device of claim 1, wherein, The quick release structure comprises a buckle installed on the bottom of the upper connecting body and a clamping groove arranged at the top end of the lower connecting body and matched with the buckle.

4. The reaming, irrigating, aspirating, and bone grafting device according to claim 3, wherein, The outer edge of the collection bottom plate is a flexible material, and the outer edge is in interference fit with the inner wall of the filter cartridge.

5. The reaming, irrigating, aspirating, and bone grafting device of claim 1, wherein, The bottom of the filter cartridge is provided with a butt joint hole, and the bottom of the collection bottom plate is provided with a flange matched with the butt joint hole.

6. The reaming, irrigating, aspirating, and bone grafting device of claim 5, wherein, The top surface of the collection bottom plate is provided with a downward recessed collection groove, and the bottom surface of the collection bottom plate is provided with a filter hole communicated with the collection groove.

7. The reaming, irrigating, aspirating, and bone grafting device of claim 6, wherein, The number of elastic reset pieces is two, and the two elastic reset pieces are symmetrically arranged on the two sides of the bottom of the top cap.

8. The reaming, irrigating, aspirating, and bone grafting device of claim 1, wherein, The elastic reset piece comprises a telescopic shaft slidingly arranged on the top cap, and a spring is arranged between the telescopic shaft and the top cap; the lower end of the telescopic shaft is used for inserting into the butt joint groove at the top end of the filter cartridge.

9. The reaming, irrigating, aspirating, and bone grafting device of claim 8, wherein, The top end of the filter cartridge is provided with two butt joint grooves matched with the telescopic shaft.

10. The reaming, irrigating, aspirating, and bone grafting device of claim 9, wherein, ​

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