Femoral head necrosis and dead bone removing device

Abstract

The utility model discloses a femoral head necrosis dead bone removing device which comprises a removing pipe barrel, a connecting barrel is installed in the removing pipe barrel, a connecting gear ring is installed on the upper surface of the connecting barrel, a threaded groove is formed in the connecting barrel, a threaded connecting rod is connected in the threaded groove in a penetrating mode, and a connecting rod is installed in the threaded connecting rod. The threaded connecting rod is in threaded connection with the threaded groove; one end of the threaded connecting rod is fixedly connected with the connecting support, the curette head is fixedly connected to the end, away from the threaded connecting rod, of the connecting support, and the pressing cap is installed at the end, away from the connecting support, of the removing pipe barrel. The pressing cap drives the fixing column to slide downwards, so that the fixing column drives the first electrode plate to be in contact with the second electrode plate downwards to be electrified, then the threaded connecting rod moves downwards in the direction of the removing pipe barrel, and the stability of the device is higher; the curette is prevented from being driven by the hand to move and adjust in the using process, and other body tissues of a patient are prevented from being damaged.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a device for removing necrotic bone from the femoral head. Background Technology

[0002] Avascular necrosis of the femoral head, also known as ischemic necrosis or aseptic necrosis of the femoral head, refers to damage or interruption of the blood supply to the femoral head, leading to injury of the nourishing blood vessels. This results in the femoral head losing its nutrition, ultimately causing bone degeneration or necrosis, fracture or collapse of the trabeculae, and causing hip pain and functional impairment. It has a high incidence rate clinically, especially among young adults, and is a common bone and joint disease. To repair the necrotic area and provide conditions for the growth of new bone tissue, it is necessary to create a window in the femoral head to perform core decompression and remove the necrotic tissue. Typically, during this type of surgery, the surgeon uses X-rays and experience to determine the surgical path, inserts a guide needle, and then drills along the guide needle into the necrotic area of ​​the femoral head with a medical drill. Finally, a curette or reamer is used to remove the necrotic area and implant new bone. Current necrotic bone removal devices are integrated, with a fixed curette length, lacking flexibility and adaptability, and unable to handle materials of different thicknesses or shapes, potentially leading to incomplete removal. In addition, the fixed length limits the flexibility and efficiency of the equipment in a variety of applications, and may increase the difficulty of operation and maintenance costs.

[0003] Therefore, there is an urgent need to provide a device for removing necrotic bone from the femoral head to solve the above problems. Utility Model Content

[0004] The technical problem to be solved by this utility model is that the existing dead bone removal device is an integrated unit, which lacks flexibility and adaptability.

[0005] To solve the above-mentioned technical problems, the present invention provides a device for removing necrotic bone from the femoral head, comprising a removal tube, a connecting tube installed inside the removal tube, a connecting toothed ring installed on the upper surface of the connecting tube, a threaded groove inside the connecting tube, a threaded connecting rod passing through the threaded groove, and a threaded connection between the threaded connecting rod and the threaded groove; one end of the threaded connecting rod is fixedly connected to a connecting bracket, a scraper head is fixedly connected to the end of the connecting bracket away from the threaded connecting rod, and a push cap is installed at the end of the removal tube away from the connecting bracket, the push cap being slidably connected to the outer side of the removal tube.

[0006] Through the above technical solution, the flexible length adjustment can quickly respond to the needs of use and improve the efficiency of use. The automatic adjustment of the scraper head position makes the device more stable and avoids damage to other body tissues of the patient caused by the hand moving and adjusting the scraper during use.

[0007] The present invention is further configured such that: a drive gear is rotatably connected to the upper end of the connecting cylinder, the drive gear meshes with the connecting gear ring, a mounting bracket is fixedly connected inside the removal tube, a servo motor is fixedly connected to the mounting bracket, and the output end of the servo motor is fixedly installed with the drive gear.

[0008] Through the above technical solution, the servo motor drives the drive gear to rotate, and the drive gear is fixed between the plug-in mounting block and the locking groove, thereby driving the connecting cylinder to rotate. Since the threaded groove and the threaded connecting rod are threadedly connected, the threaded connecting rod moves downward along the direction of removing the tube cylinder.

[0009] The present invention is further configured such that: a locking groove is provided inside the connecting cylinder, and a plug-in mounting block is installed in the locking groove, and the plug-in mounting block is fixedly connected to the connecting gear ring.

[0010] The present invention is further configured such that: a limiting sliding seat is fixedly connected to one end of the threaded connecting rod away from the connecting bracket, and the limiting sliding seat is slidably connected to the inner wall of the tube being removed.

[0011] The present invention is further configured such that: a fixing post is fixedly installed inside the pressing cap; a first electrode plate is fixedly connected to the end of the fixing post away from the pressing cap; a second electrode plate is fixedly connected to the upper end of the rejection tube; and multiple return springs are fixedly connected to the upper surface of the rejection tube, with the two ends of the multiple return springs respectively fixedly connected to the pressing cap and the rejection tube.

[0012] Through the above technical solution, the pressing cap drives the fixing column to slide downward, so that the fixing column drives the first electrode plate to contact the second electrode plate downward, so that the device is powered on. When the pressing cap is released, the return spring pushes the pressing cap to move upward, the first electrode plate and the second electrode plate separate, and the device is powered off.

[0013] The present invention is further configured such that: the connecting bracket and the scraper head are integrated, and an anti-slip pad is fixedly connected to the outer wall of the scraping tube, and the anti-slip pad is made of rubber.

[0014] The beneficial effects of this utility model are as follows:

[0015] This invention uses a pressing cap to slide the fixing column downwards, causing the fixing column to bring the first electrode plate downwards and into contact with the second electrode plate, thus energizing it. This causes the threaded connecting rod to move downwards along the direction of the removal tube. The threaded connecting rod can drive the scraper head to move precisely towards the patient's affected area through the connecting bracket. The flexible length adjustment can quickly respond to the needs of use, improving efficiency. The easy-to-adjust design makes operation simpler and reduces the difficulty of use. At the same time, the automatic adjustment of the scraper head position makes the device more stable and avoids damage to other body tissues of the patient caused by the scraper being moved and adjusted by hand during use. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a cross-sectional view of the present invention with the tube removed;

[0018] Figure 3 This is a diagram showing the internal structure of the tube of this utility model.

[0019] Figure 4 This utility model Figure 2 Enlarged view of the structure at point A.

[0020] In the diagram: 1. Removal tube; 2. Connecting tube; 21. Connecting gear ring; 22. Engaging groove; 23. Insertion mounting block; 24. Threaded groove; 3. Threaded connecting rod; 31. Limiting sliding seat; 32. Connecting bracket; 33. Scraper head; 4. Drive gear; 41. Servo motor; 42. Mounting bracket; 5. Press cap; 51. Fixing post; 52. First electrode plate; 53. Return spring; 54. Second electrode plate. Detailed Implementation

[0021] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0022] Please see Figures 1-4 A device for removing necrotic bone from the femoral head includes a removal tube 1, a connecting tube 2 installed inside the removal tube 1, a connecting toothed ring 21 installed on the upper surface of the connecting tube 2, a threaded groove 24 inside the connecting tube 2, a threaded connecting rod 3 passing through the threaded groove 24, and a threaded connection between the threaded connecting rod 3 and the threaded groove 24; one end of the threaded connecting rod 3 is fixedly connected to a connecting bracket 32, and a scraper head 33 is fixedly connected to the end of the connecting bracket 32 ​​away from the threaded connecting rod 3; a push-button cap 5 is installed at the end of the removal tube 1 away from the connecting bracket 32, and the push-button cap 5 is slidably connected to the outside of the removal tube 1. The flexible length adjustment can quickly respond to the needs of use, improve the efficiency of use, and the automatic adjustment of the position of the scraper head 33 makes the device more stable, avoiding damage to other body tissues of the patient caused by the scraper being moved and adjusted by hand during use.

[0023] A drive gear 4 is rotatably connected to the upper end of the connecting cylinder 2. The drive gear 4 meshes with the connecting gear ring 21 for transmission. A mounting bracket 42 is fixedly connected inside the removal tube 1. A servo motor 41 is fixedly connected to the mounting bracket 42. The output end of the servo motor 41 is fixedly installed with the drive gear 4. The servo motor 41 drives the drive gear 4 to rotate. The drive gear 4 is fixed between the plug-in mounting block 23 and the locking groove 22, thereby driving the connecting cylinder 2 to rotate. Since the threaded groove 24 is threadedly connected to the threaded connecting rod 3, the threaded connecting rod 3 moves downward along the direction of the removal tube 1.

[0024] The connecting cylinder 2 has a locking groove 22, and a plug-in mounting block 23 is installed in the locking groove 22. The plug-in mounting block 23 is fixedly connected to the connecting toothed ring 21. The threaded connecting rod 3 is fixedly connected to a limiting sliding seat 31 at the end away from the connecting bracket 32. The limiting sliding seat 31 is slidably connected to the inner wall of the removal tube cylinder 1.

[0025] A fixing post 51 is fixedly installed inside the push cap 5. A first electrode plate 52 is fixedly connected to the end of the fixing post 51 away from the push cap 5. A second electrode plate 54 is fixedly connected to the upper end of the removal tube 1. Multiple return springs 53 are fixedly connected to the upper surface of the removal tube 1. The two ends of the multiple return springs 53 are fixedly connected to the push cap 5 and the removal tube 1 respectively. The push cap 5 drives the fixing post 51 to slide downward, so that the fixing post 51 drives the first electrode plate 52 to contact the second electrode plate 54 downward, so that the device is powered on. When the push cap 5 is released, the return spring 53 pushes the push cap 5 to move upward, and the first electrode plate 52 and the second electrode plate 54 separate, thereby de-energizing the device. The connecting bracket 32 ​​and the scraper head 33 are integrated. An anti-slip pad is fixedly connected to the outer wall of the removal tube 1, and the anti-slip pad is made of rubber.

[0026] When using this invention, if the scraper head 33 cannot reach the bone to be removed when using the removal device, the operator does not need to remove the device from the body. Instead, the operator presses down the pressing cap 5, which causes the fixing post 51 to slide downwards. This causes the fixing post 51 to move the first electrode plate 52 downwards and into contact with the second electrode plate 54, energizing the device. The servo motor 41 then drives the drive gear 4 to rotate. The drive gear 4 is fixed between the plug-in mounting block 23 and the locking groove 22, thereby driving the connecting cylinder 2 to rotate. Since the threaded groove 24 is threadedly connected to the threaded connecting rod 3, the threaded connecting rod 3 moves downwards along the direction of the removal tube 1. The threaded connecting rod 3 can drive the scraper head 33 to move precisely towards the patient's affected area through the connecting bracket 32, avoiding medical accidents caused by hand tremors or operational errors.

[0027] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A device for removing necrotic bone from the femoral head, comprising a removal tube (1), characterized in that: A connecting tube (2) is installed inside the removal tube (1). A connecting toothed ring (21) is installed on the upper surface of the connecting tube (2). A threaded groove (24) is opened inside the connecting tube (2). A threaded connecting rod (3) is connected through the threaded groove (24). The threaded connecting rod (3) and the threaded groove (24) are connected by threads. One end of the threaded connecting rod (3) is fixedly connected to the connecting bracket (32), and a scraper head (33) is fixedly connected to the end of the connecting bracket (32) away from the threaded connecting rod (3). A push cap (5) is installed on the end of the removal tube (1) away from the connecting bracket (32), and the push cap (5) is slidably connected to the outside of the removal tube (1).

2. The device for removing necrotic bone from the femoral head according to claim 1, characterized in that: The upper end of the connecting cylinder (2) is rotatably connected to a drive gear (4), and the drive gear (4) meshes with the connecting gear ring (21) for transmission. The inside of the removal tube (1) is fixedly connected to a mounting bracket (42), and a servo motor (41) is fixedly connected to the mounting bracket (42). The output end of the servo motor (41) is fixedly installed with the drive gear (4).

3. The femoral head necrosis necrotic bone removal device according to claim 1, characterized in that: The connecting cylinder (2) has a locking groove (22) inside, and a plug-in mounting block (23) is installed in the locking groove (22). The plug-in mounting block (23) is fixedly connected to the connecting toothed ring (21).

4. The femoral head necrosis necrotic bone removal device according to claim 1, characterized in that: The threaded connecting rod (3) is fixedly connected to a limiting sliding seat (31) at the end away from the connecting bracket (32), and the limiting sliding seat (31) is slidably connected to the inner wall of the removal tube (1).

5. The femoral head necrosis necrotic bone removal device according to claim 1, characterized in that: A fixing post (51) is fixedly installed inside the pressing cap (5). A first electrode plate (52) is fixedly connected to the end of the fixing post (51) away from the pressing cap (5). A second electrode plate (54) is fixedly connected to the upper end of the rejection tube (1). A plurality of return springs (53) are fixedly connected to the upper surface of the rejection tube (1). The two ends of the plurality of return springs (53) are fixedly connected to the pressing cap (5) and the rejection tube (1) respectively.

6. The femoral head necrosis necrotic bone removal device according to claim 1, characterized in that: The connecting bracket (32) and the scraper head (33) are integrated. The outer wall of the removal tube (1) is fixedly connected with an anti-slip pad, which is made of rubber.

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