Femoral marrow collection device

Abstract

The utility model discloses a femoral marrow collection device, sleeve pipe guide component and bone marrow suction subassembly, sleeve pipe guide component includes hard guide pipe, soft guide pipe and holds piece, and bone marrow suction subassembly includes suction piece and suction pipe, is equipped with through -hole on the suction pipe and at least partial adoption soft material and is made. The femoral marrow collection device of the utility model can adapt to the existing spring drill to use in operation and is convenient and easy to operate.

Description

Technical Field

[0001] This utility model belongs to the field of orthopedic surgical instruments, specifically relating to a femoral bone marrow collection device. Background Technology

[0002] In hip-preserving surgery for avascular necrosis of the femoral head, the acquisition and utilization of bone marrow mesenchymal stem cells are key factors affecting bone regeneration outcomes. Current technologies have the following main shortcomings:

[0003] In femoral head drilling decompression surgery, some doctors will simultaneously aspirate some iliac bone marrow fluid when harvesting bone from the iliac bone, mix it, and then reimplant it. If bone marrow is not harvested from the iliac bone, the femoral bone marrow aspiration and reimplantation procedure is not performed during the operation. However, bone marrow contains abundant bone marrow mesenchymal stem cells, which are of great help to bone regeneration.

[0004] 1. Traditional bone marrow collection methods require independent punctures in the iliac crest, which carries risks of donor site pain, hematoma, and nerve damage. Multi-site puncture collection under general anesthesia not only prolongs the procedure time but also results in a high rate of microbial contamination due to the open-access approach.

[0005] 2. Although peripheral blood stem cell mobilization technology avoids bone marrow aspiration, it requires continuous preoperative injection of granulocyte colony-stimulating factor (G-CSF), which may cause complications such as bone pain and spleen rupture. The concentration of stem cells obtained is only 1 / 10 to 1 / 20 of that obtained from bone marrow, which is insufficient to meet the needs of bone regeneration.

[0006] 3. Although the multi-hole bone aspiration needle collection system enables single-point puncture to obtain bone marrow fluid, its accompanying centrifugation device requires the sample to be transferred to the laboratory environment for processing, which leads to an exponential decline in stem cell activity over time (activity loss >15% per hour at room temperature).

[0007] The existing technological system suffers from the risks of "multiple incisions" and "loss of bioactive substances," which severely restrict the development of hip-preserving surgery towards minimally invasive and standardized procedures. Therefore, there is an urgent need to develop an innovative instrument system that can simultaneously complete the removal of necrotic bone, autologous bone recovery, and biomaterial composite within a single bone tunnel. Utility Model Content

[0008] The purpose of this invention is to provide a femoral bone marrow collection device that is compatible with existing spring drills for surgery and is easy to operate and use.

[0009] To achieve the above objectives, the solution adopted by this utility model is as follows:

[0010] A femoral bone marrow collection device includes a cannula guiding assembly and a bone marrow aspiration assembly. The cannula guiding assembly includes a rigid guide tube, a flexible guide tube, and a holding member. The holding member is connected to the rigid guide tube, and the flexible guide tube is connected to the rigid guide tube to form a guide lumen within both. The bone marrow aspiration assembly includes an aspiration member and an aspiration tube communicating with an aspiration cavity in the aspiration member. The aspiration tube has a through hole and is at least partially made of a flexible material.

[0011] After adopting the above technical solution, the cannula guide component and the bone marrow aspiration component are used together with the existing spring drill. After the lateral opening is completed, the doctor can accurately drill along the midline of the femur and aspirate the bone marrow fluid. The cannula guide component has a significant guiding effect on the drilling process of the spring drill and is easy to adjust, which can improve the surgical results.

[0012] According to the above-mentioned femoral bone marrow collection device, a handle is connected to the proximal end of the holding member to facilitate the doctor's grip and operation.

[0013] According to the above-mentioned femoral bone marrow collection device, the handle is a T-shaped handle and is sleeved and fixed on the holding member.

[0014] According to the above-mentioned femoral bone marrow collection device, the rigid guide tube is an annular tube, the holding member is fixed to the upper part of its side wall, and the rigid guide tube extends a predetermined distance below the holding member, thereby maximizing the use of the height of the side opening, improving applicability, and ensuring that the guiding effect is not affected.

[0015] According to the above-mentioned femoral bone marrow collection device, the soft guide tube is sleeved inside the rigid guide tube and fixedly connected to it, and the two ends of the guide tube cavity are respectively formed as a first port and a second port.

[0016] According to the above-described femoral bone marrow collection device, a neck is provided between the suction member and the suction tube.

[0017] According to the aforementioned femoral bone marrow collection device, the aspiration component and the aspiration tube are detachably connected, and the aspiration tube is made of a soft material. The detachable design allows doctors to adjust and select components with different specifications, and also allows for the use of existing syringes as aspiration components, reducing costs or enabling emergency assembly.

[0018] According to the above-mentioned femoral bone marrow collection device, the aspiration component includes a cylindrical component and a piston component, wherein the piston component is provided with a piston component and is assembled in the aspiration chamber of the cylindrical component.

[0019] Preferably, the front end of the cylindrical component is provided with a connector, and the suction tube includes a suction tube body and a sleeve neck, the sleeve neck being tightly fitted onto the connector.

[0020] Preferably, the through hole is located at the distal end of the straw body.

[0021] The femoral bone marrow collection device of this invention can maximize the use of the side opening for adaptation, eliminating the need for additional surgical operations such as opening or enlarging holes for bone marrow harvesting. Moreover, it is convenient for doctors to operate and adjust during the operation, and the direction or angle of the downward opening of the spring drill can be adjusted as needed according to different patients' conditions. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the cannula guide assembly in the femoral bone marrow collection device of this utility model;

[0023] Figure 2 yes Figure 1 Side view of the sleeve guide assembly;

[0024] Figure 3 yes Figure 2 A sectional view;

[0025] Figure 4 This is a three-dimensional structural diagram of the bone marrow aspiration component in the femoral bone marrow collection device of this utility model;

[0026] Figure 5 yes Figure 4 A structural decomposition diagram.

[0027] in,

[0028] Cannula guiding assembly 10, bone marrow aspiration assembly 20,

[0029] Rigid guide tube 11, soft guide tube 12, grip 13, handle 131, guide tube cavity 121, first port 122, second port 123, suction component 21, straw component 22, neck 23, through hole 201, cylinder component 211, piston component 212, connector 213, straw body 221, and sleeve neck 222. Detailed Implementation

[0030] To enable those skilled in the art to better understand this utility model and to more clearly define the scope of protection claimed by this utility model, the present utility model will be described in detail below with reference to certain specific embodiments.

[0031] like Figure 1-5As shown, a femoral bone marrow collection device consists of two parts: a cannula guide assembly 10 and a bone marrow aspiration assembly 20. These are independent components but can be used in combination. The cannula guide assembly 10 is installed through an opening in the femur to guide the spring drill, allowing it to drill downwards along the centerline inside the femur from the opening on one side. After drilling to the point where the bone marrow fluid is connected, the bone marrow aspiration assembly 20 is inserted and the bone marrow is aspirated. Therefore, the device in this embodiment needs to be used in conjunction with a spring drill, which is an existing device and will not be described further.

[0032] like Figure 1-3 As shown, the cannula guide assembly 10 of this embodiment includes a rigid guide tube 11, a soft guide tube 12, and a holding member 13. The rigid guide tube 11 is an annular tube, and the holding member 13 is fixed to its side wall, thereby forming a guide cavity 121 inside. The soft guide tube 12 is sleeved inside the rigid guide tube 11 and fixed to it. The two ends of the guide cavity 121 are respectively formed as a first port 122 and a second port 123. The first port 122 is used to connect to the outside for surgical instruments to enter, such as a spring drill or a suction assembly 20. The second port 123 is used for the above instruments to perform surgical operations in the femur, such as drilling or suction. Therefore, the guide tube 121 provides an arc-shaped guiding tube that allows surgical instruments to be bent and guided from a generally horizontal orientation to a downward orientation along the femoral centerline. This is especially important for spring drills, which can drill along the centerline direction after being guided by the guide tube 121. By adjusting the rigid guide tube 11 and the soft guide tube 12, the surgeon can guide the opening direction or angle of the spring drill as needed, thereby improving the success rate of the surgery.

[0033] In this embodiment, the holding member 13 is fixed to the upper side wall of the rigid guide tube 11, as close as possible to its upper edge, and the rigid guide tube 11 extends a predetermined distance below the holding member 13. This maximizes the utilization of the lateral opening of the femur, and the guide tube lumen 121 provides the best guiding effect. The reason is that for the needs of minimally invasive surgery and better postoperative recovery, the lateral opening should generally be as small as possible. The vertical distance H between the lower end of the holding member 13 and the upper end of the soft guide tube 12 is the height of the lateral opening; this design minimizes the value of H. Extending the rigid guide tube 11 below the holding member 13 improves the guiding effect of the guide tube lumen 121 without increasing H. Generally, the extension length of the rigid guide tube 11 can be 3-10 mm.

[0034] Preferably, a handle 131 is connected to the proximal end of the gripping member 13 to facilitate the doctor's grip. Here, the proximal end refers to the end closer to the doctor, or can be understood as the end further away from the patient's body. The handle 131 is preferably a T-shaped handle, which is sleeved and fixed to the distal end of the gripping member 13.

[0035] In this embodiment, both the rigid guide tube 11 and the handle 13 are made of rigid materials. Their positions and orientations can be adjusted according to the doctor's needs to meet the surgical needs of different patients. The handle 131 also makes it easier for the doctor to hold and control the device.

[0036] like Figure 4-5 As shown, the bone marrow aspiration assembly 20 of this embodiment is specifically composed of an aspiration member 21 and an aspiration member 22. An aspiration chamber (not shown in the figure) is provided inside the aspiration member 22, and the aspiration member 22 is connected to the aspiration chamber. The aspiration member 21 is similar to a syringe in function and structure, that is, it generates a vacuum to aspirate bone marrow fluid. The aspiration member 22 is used to be at least partially inserted into the femur drilled by a spring drill to aspirate and store bone marrow fluid. The aspiration member 22 should be made of soft material at least partially to facilitate insertion. A through hole 201 is provided on the side wall of the aspiration tube 22.

[0037] As a preferred option, such as Figure 4 As shown, a neck 23 is provided between the suction member 21 and the suction tube 22, and the neck 23 has a smaller outer diameter.

[0038] like Figure 5 As shown, the suction component 21 is specifically composed of a cylindrical component 211 and a piston component 212. The interior of the cylindrical component 211 is hollow to form a suction chamber. The piston component 212 is located at its front end and is sealed and assembled inside the suction chamber. Therefore, the suction component 21 has a structure and working principle similar to a syringe. Preferably, a connector 213 is provided at the front end of the cylindrical component 211. The connector 213 has a through hole communicating with the suction chamber for the suction component 22 to communicate. The suction tube 22 is made entirely of a soft tube, such as a flexible tube. The suction tube 22 includes a tube body 221 and a sleeve neck 222. A through hole 201 is provided at the distal end of the tube body 221, and the sleeve neck 222 is tightly fitted onto the connector 213. Figure 5 As shown, there are multiple through holes 201 arranged sequentially along the length of the straw body 221. In other embodiments, the through holes 201 can also be arranged in a ring along the circumferential direction on the straw body 221.

[0039] Therefore, the suction component 21 and the suction tube 22 are detachably connected, facilitating separate manufacturing of both and allowing for replacement of only the damaged component if one is damaged, rather than replacing the entire assembly. Furthermore, the suction component 21 or the suction tube 22 can be selected as an assembly, for example, a smaller diameter suction tube 22 or a larger volume suction component 21 can be chosen. In addition, since the suction component 21 can be replaced by existing syringes, it can be procured and used with compatible registration devices, reducing costs and facilitating widespread application.

Claims

1. A femoral bone marrow collection device, comprising a cannula guiding assembly (10) and a bone marrow aspiration assembly (20), characterized in that, The cannula guide assembly (10) includes a rigid guide tube (11), a soft guide tube (12), and a holding member (13). The holding member (13) is connected to the rigid guide tube (11), and the soft guide tube (12) is connected to the rigid guide tube (11) to form a guide tube cavity (121) within both. The bone marrow aspiration assembly (20) includes an aspiration member (21) and an aspiration tube (22) communicating with the aspiration cavity of the aspiration member (21). The aspiration tube (22) is provided with a through hole (201), and the aspiration tube (22) is at least partially made of a soft material.

2. The femoral bone marrow collection device according to claim 1, characterized in that, A handle (131) is connected to the proximal end of the grip (13).

3. The femoral bone marrow collection device according to claim 2, characterized in that, The handle (131) is a T-shaped handle and is fitted and fixed on the grip (13).

4. The femoral bone marrow collection device according to claim 1, characterized in that, The rigid guide tube (11) is an annular tube, the gripping member (13) is fixed to the upper part of its side wall, and the rigid guide tube (11) extends a predetermined distance below the gripping member (13).

5. The femoral bone marrow collection device according to claim 4, characterized in that, The soft guide tube (12) is sleeved inside the hard guide tube (11) and fixedly connected to it. The two ends of the guide tube cavity (121) are respectively formed as a first port (122) and a second port (123).

6. The femoral bone marrow collection device according to any one of claims 1-5, characterized in that, A neck (23) is provided between the suction member (21) and the suction tube (22).

7. The femoral bone marrow collection device according to claim 6, characterized in that, The suction component (21) is detachably connected to the suction tube (22), and the suction tube (22) is made of soft material.

8. The femoral bone marrow collection device according to claim 7, characterized in that, The suction component (21) includes a cylindrical component (211) and a piston component (212). The piston component (212) is provided with a piston component and is assembled in the suction chamber of the cylindrical component (211). The front end of the cylindrical component (211) is also provided with a connector (213). The suction tube (22) includes a tube body (221) and a sleeve neck (222). The sleeve neck (222) is tightly fitted onto the connector (213). The through hole (201) is located at the distal end of the tube body (221).

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