Hollow screw for fixing medicine-injectable optical positioning device

Abstract

The invention discloses a hollow screw for fixing a medicine-injectable optical positioning device, which relates to the technical field of medical instruments, and is characterized in that the hollow screw comprises a first screw and a second screw, one end of the second screw is provided with a cutting edge head, the other end of the second screw is provided with a second inner hexagonal cavity, and a screw plug is arranged in the second inner hexagonal cavity; a plug cavity is formed in the side, away from the head of the cutting edge, of the second inner hexagonal cavity, a third thread is arranged outside the second screw, an inner thread is arranged inside the second screw, and the inner thread is matched with the second thread of the first screw. Through cooperation of the first screw and the second screw, the pressure of the broken bone position can be adjusted, better fixation is facilitated, meanwhile, third threads with different diameters are arranged on the second screw, the problem of thread slipping in the fixing process can be prevented, and the stability of the hollow screw can be better improved.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and more specifically to a hollow screw for fixing an injectable optical positioning device. Background Art

[0002] A fracture refers to a complete or partial break in the continuity of a bone structure. It is more common in children and the elderly, but also occurs occasionally in young and middle-aged people. Patients often have a fracture in one part of the body, and a few have multiple fractures. Surgery is a relatively effective treatment option.

[0003] With the continuous introduction of new surgical theories, people realize that the degree of damage to the soft tissue around the fracture and ensuring that the bone tissue has a good blood supply are equally important. In orthopedic surgery, hollow screws are a commonly used internal fixation device that plays a major role in the treatment of fractures. They are mainly used for the fixation and stabilization of fractures, and can achieve good fixation effects through surgery. They are usually made of titanium alloy, have high strength and good biocompatibility, and are suitable for various fracture internal fixation surgeries.

[0004] Although hollow screws are widely used in orthopedic surgery, the traditional design has some limitations. For example, the traditional screws are integrated and cannot adjust the pressure of the patient's broken bone. At the same time, the screws may still loosen after fracture surgery, and bone cysts may occur in the later stage. It is necessary to readjust the implanted hollow screws, which may cause secondary damage to the patient's broken bone and is not conducive to the patient's broken bone healing recovery.

[0005] Therefore, the present invention aims to provide a hollow screw for fixing an injectable optical positioning device to solve the above-mentioned problems. Summary of the invention

[0006] The purpose of the present invention is to provide a hollow screw for fixing an injectable optical positioning device. The present invention cooperates with a first screw and a second screw to adjust the pressure at the broken bone position to help better fix it. At the same time, the second screw is provided with a third thread of different diameters, which can prevent the problem of thread slippage during the fixation process and better improve the stability of the hollow screw.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions: A hollow screw for fixing an injectable optical positioning device, comprising a first screw, two ends of the first screw are respectively provided with a first thread and a second thread, and an end of the first screw close to the second thread is provided with a first hexagonal cavity;

[0008] The hollow screw also includes a second screw, one end of which is provided with a cutting edge head, and the other end is provided with a second hexagonal inner cavity, the second hexagonal inner cavity is provided with a plug cavity on the side away from the cutting edge head, a screw plug is provided in the plug cavity, a third thread is provided on the outside of the second screw, and an internal thread is provided on the inside of the second screw, and the internal thread is matched and connected with the second thread of the first screw.

[0009] By adopting the above technical solution, a first thread and a second thread are respectively provided at both ends of the first screw, and the broken bone of the patient can be fixed by the first screw. A second screw is also included, and the second screw is threadedly connected to the first screw. The second screw can be rotated and retracted relative to the first screw, so that the pressure at the broken bone position can be adjusted to help better fixation. At the same time, a third thread is provided on the second screw, which can prevent the problem of thread slippage of ordinary screws during the fixation process and can better improve the stability of the hollow screw.

[0010] The present invention is further configured such that: a flat head is provided at the end of the first screw close to the first thread.

[0011] By adopting the above technical solution, a flat head is provided at the end of the first screw close to the first thread, that is, there is no top structure, so that the screw can be completely buried in the bone, will not have a negative impact on the movement of the joint, and at the same time reduce the effect of irritation to the soft tissue around the bone.

[0012] The present invention is further configured as follows: a plurality of drainage holes are provided on the first screw.

[0013] By adopting the above technical solution, a plurality of drainage holes are provided on the first screw. During the process of adding medicine, the medicine can be added from the through hole at the tail of the screw. The medicine can smoothly enter the bone along the drainage holes, thereby ensuring the range of action of the medicine in the bone and the smoothness of adding the medicine.

[0014] The present invention is further configured as follows: an annular groove is provided in the plug cavity of the second screw.

[0015] The present invention is further configured as follows: the screw plug includes a first cylinder and a second cylinder, the first cylinder and the second cylinder are connected, and the second cylinder matches the plug cavity of the second screw.

[0016] By adopting the above technical solution, a first cylinder and a second cylinder are provided on the screw plug, and the second cylinder matches the plug cavity of the second screw, so that the medicine can be kept to act accurately on the position of the broken bone connection. At the same time, if there is a bone cyst in the later stage, it can also be directly connected to the negative pressure drainage device to drain out the accumulated material, avoiding the need to remove the hollow screw again, thereby avoiding secondary injury to the patient.

[0017] The present invention is further configured as follows: an annular protrusion is provided on the second cylinder, and the annular protrusion matches the annular groove in the plug cavity.

[0018] By adopting the above technical solution, annular protrusions are provided on the two cylinders, and the annular protrusions match the annular grooves in the plug cavity, which can better ensure the connection stability between the screw plug and the hollow screw.

[0019] In summary, the present invention has the following beneficial effects:

[0020] 1. The present invention can fix the broken bone of the patient by providing a first screw and a second screw at both ends of the first screw, and also includes a second screw, which is threadedly connected to the first screw. The second screw can rotate and retract relative to the first screw, so that the pressure at the broken bone position can be adjusted to help better fixation. At the same time, the second screw is provided with a third thread, which can prevent the problem of thread slippage of ordinary screws during the fixation process, and can better improve the stability of the hollow screw;

[0021] 2. The present invention provides a flat head at the end of the first screw near the first thread, that is, there is no top structure, so that the screw can be completely buried in the bone, which will not have a negative impact on the movement of the joint and reduce the effect of irritation to the soft tissue around the bone;

[0022] 3. The present invention is provided with a plurality of drainage holes on the first screw. During the process of adding the medicine, the medicine can be added from the through hole at the tail of the screw, and the medicine can smoothly enter the bone along the drainage holes, thereby ensuring the effective range of the medicine in the bone and the smoothness of adding the medicine;

[0023] 4. A first cylinder and a second cylinder are connected on the screw plug, and the second cylinder matches the plug cavity of the second screw, which can keep the medicine accurately acting on the position of the broken bone connection. At the same time, if there is a bone cyst in the later stage, it can also be directly connected to the negative pressure drainage device to drain out the accumulated material, avoiding the need to remove the hollow screw again, thereby avoiding secondary injury to the patient and accelerating the healing of the broken bone of the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the appearance of a hollow screw for fixing an injectable optical positioning device according to an embodiment of the present invention;

[0025] Figure 2 is a schematic diagram of a first screw in an embodiment of the present invention;

[0026] Figure 3 is a schematic diagram of two screws in an embodiment of the present invention;

[0027] Figure 4It is a front cross-sectional view of a hollow screw for fixing an injectable optical positioning device according to an embodiment of the present invention;

[0028] Figure 5 is a schematic diagram of a screw plug in an embodiment of the present invention;

[0029] Figure 6 It is a cross-sectional view of the connection position of the first screw and the second screw in an embodiment of the present invention.

[0030] In the figure: 1. first screw; 2. first thread; 3. second thread; 4. drainage hole; 5. flat head; 6. first hexagonal cavity; 7. second screw; 8. third thread; 9. internal thread; 10. cutting edge head; 11. second hexagonal cavity; 12. plug cavity; 13. annular groove; 14. screw plug; 15. first cylinder; 16. second cylinder; 17. annular protrusion. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-6 The present invention is described in further detail.

[0032] Embodiment: A hollow screw for fixing an injectable optical positioning device comprises a first screw 1, a first thread 2 is arranged on the right outer wall of the first screw 1, a flat head 5 is arranged on the right end of the first screw 1, a second thread 3 is arranged on the left outer wall of the first screw 1, a first hexagonal cavity 6 is arranged at the end of the first screw 1 close to the second thread 3, and a plurality of drainage holes 4 are fixedly arranged on the first screw 1.

[0033] The hollow screw of this embodiment also includes a second screw 7, a cutting blade head 10 is provided at the right end of the second screw 7, and a second hexagonal inner cavity 11 is provided at the other end, a plug cavity 12 is provided on the side of the second hexagonal inner cavity 11 away from the cutting blade head 10, a screw plug 14 is installed in the plug cavity 12, and the screw plug 14 includes a first cylinder 15 and a second cylinder 16, the first cylinder 15 and the second cylinder 16 are connected, and the second cylinder 16 matches the plug cavity 12 of the second screw 7, and the diameter of the second cylinder 16 is Smaller than the first cylinder 15, the diameter of the first cylinder 15 corresponds to the outer diameter of the plug cavity 12, an annular groove 13 is fixedly installed in the plug cavity 12, and an annular protrusion 17 is fixedly provided on the second cylinder 16, and the annular protrusion 17 matches the annular groove 13 in the plug cavity 12, which can better increase the stability of the screw plug 14, the outside of the second screw 7 is provided with a third thread 8, and the inside of the second screw 7 is fixedly provided with an internal thread 9, and the internal thread 9 is threadedly connected with the second thread 3 of the first screw 1.

[0034] Preferably, in this embodiment, the diameter of the third thread 8 on the second screw 7 is larger than the diameter of the first thread 2 on the first screw 1, and the pitch of the third thread 8 on the second screw 7 is smaller than the pitch of the first thread 2 on the first screw 1, that is, the lead of the third thread 8 on the second screw 7 is smaller than the lead of the first thread 2 on the first screw 1, so that the hollow screw can be screwed in evenly from the flat part to the tail of the screw during the screwing process and the pressurization process, which makes it smoother to use. At the same time, for some patients with low bone density, the difference in thread diameter can help the hollow screw to be more stably fixed at the bone fracture position.

[0035] Working principle: When the present invention is in use, a guide needle and a drill bit are used to drill holes at corresponding positions of the broken bones. First, the first screw 1 is screwed into the broken bone of the patient so that the first thread 2 and the second thread 3 are respectively located at two ends of the broken bone position to connect the broken bones. Then the second screw 7 is screwed in. The third thread 8 of the second screw 7 has a different diameter from the first thread 2, which can help the hollow screw to better fix the broken bones. Then, the crack at the broken bone of the patient is observed, and the second screw 7 is slowly rotated until the crack at the broken bone is completely closed to complete the fixation of the hollow screw. Then, by adding medicine into the plug cavity 12, the medicine will reach the position of the broken bone along the drainage hole 4 to plug the screw bone. When the patient develops a bone cyst in the later stage, the screw plug 14 can be removed and a related negative pressure drainage device can be connected externally. At the same time, the drainage hole 4 on the first screw 1 can be used to drain the accumulated material, and the medicine can be added again to help the broken bone heal, thereby avoiding the need to remove the hollow screw again, thereby avoiding secondary injury to the patient and accelerating the healing and recovery of the patient's broken bone.

[0036] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A hollow screw for fixing an injectable optical positioning device, characterized in that: It comprises a first screw (1), wherein two ends of the first screw (1) are respectively provided with a first thread (2) and a second thread (3), and an end of the first screw (1) close to the second thread (3) is provided with a first hexagonal cavity (6); The hollow screw further comprises a second screw (7), one end of the second screw (7) being provided with a cutting blade head (10), and the other end being provided with a second hexagonal inner cavity (11), a plug cavity (12) being provided on a side of the second hexagonal inner cavity (11) away from the cutting blade head (10), a screw plug (14) being provided in the plug cavity (12), a third thread (8) being provided on the outside of the second screw (7), an internal thread (9) being provided on the inside of the second screw (7), and the internal thread (9) being matched and connected with the second thread (3) of the first screw (1).

2. The hollow screw for fixing an injectable optical positioning device according to claim 1, characterized in that: The end of the first screw (1) close to the first thread (2) is provided with a flat head (5).

3. The hollow screw for fixing an injectable optical positioning device according to claim 1, characterized in that: The first screw (1) is provided with a plurality of drainage holes (4).

4. The hollow screw for fixing an injectable optical positioning device according to claim 1, characterized in that: An annular groove (13) is provided in the plug cavity (12) of the second screw (7).

5. The hollow screw for fixing an injectable optical positioning device according to claim 4, characterized in that: The screw plug (14) comprises a first cylinder (15) and a second cylinder (16), wherein the first cylinder (15) and the second cylinder (16) are connected, and the second cylinder (16) matches the plug cavity (12) of the second screw (7).

6. The hollow screw for fixing an injectable optical positioning device according to claim 5, characterized in that: The second cylindrical body (16) is provided with an annular protrusion (17), and the annular protrusion (17) matches the annular groove (13) in the plug cavity (12).

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