Broken intramedullary nail taking-out device

Abstract

The utility model discloses a broken intramedullary nail take-out device which comprises an intramedullary nail, a broken nail, a take-out mechanism and a screwdriver assembly, hollow grooves are formed in the middle of the intramedullary nail and the middle of the broken nail, a fracture groove is formed in the fracture position between the intramedullary nail and the broken nail, and the take-out mechanism penetrates through the positions of the hollow grooves. A nail head is integrally formed at the front end of the broken nail, a rotator is arranged at the position, penetrating through the nail head, of the end of the taking-out mechanism, a rotating shaft is arranged between the taking-out mechanism and the rotator, and a nail tail is integrally formed at the rear end of the intramedullary nail. According to the broken intramedullary nail taking-out device, the device enters the intramedullary nail along the hollow part in the intramedullary nail, the far end of the device directly reaches the far end of the intramedullary nail after passing through the broken end, after the taking-out device is pulled, the far end part device rotates along the shaft and clamps the broken nail, the intramedullary nail and the broken nail are combined, and after the screw core is screwed in and fixed, the broken nail is taken out from the intramedullary nail. And reversely beating and pulling to take out the intramedullary nail and the broken nail.

Description

Technical Field

[0001] The utility model relates to the technical field of extraction of broken intramedullary nails, and particularly relates to an extraction device for broken intramedullary nails. Background Art

[0002] An extraction device for broken intramedullary nails is a supporting structure for extracting a combined broken intramedullary nail from the body. Intramedullary nails are often used for internal fixation treatment of tubular bone fractures such as femoral shaft fractures, tibial shaft fractures, or humeral shaft fractures. This surgical method has many advantages such as minimally invasive, intramedullary fixation, short operation time, and small injury. With the continuous development of technology, people's requirements for the manufacturing process of intramedullary nails are also getting higher and higher.

[0003] Existing intramedullary nails have certain drawbacks in use. Occasionally, the intramedullary nail may break after surgery. In this case, the complete extraction of the intramedullary nail, especially the extraction of the distal part of the broken part, becomes a challenge. Forcible extraction may damage soft tissues and bone, bringing certain adverse effects to the actual use process. Therefore, we propose an extraction device for broken intramedullary nails. Summary of the Utility Model

[0004] In view of the deficiencies of the prior art, the utility model provides an extraction device for broken intramedullary nails. The device enters the intramedullary nail along the hollow part inside the intramedullary nail, reaches the distal end of the intramedullary nail after passing through the fracture end at the distal end, and then rotates the distal part of the device along the axis after pulling the extraction device, and clamps the broken nail to combine the intramedullary nail and the broken nail. At this time, after screwing in the screw core for fixation and then pulling out in the reverse direction, the intramedullary nail and the broken nail can be taken out, effectively solving the problems in the background art.

[0005] To achieve the above object, the technical solution adopted by the utility model is: an extraction device for broken intramedullary nails, including an intramedullary nail, a broken nail, an extraction mechanism, and a screwdriver assembly. A hollow groove is provided in the middle of both the intramedullary nail and the broken nail. A fracture groove is provided at the fracture position between the intramedullary nail and the broken nail. The extraction mechanism passes through the hollow groove. A nail head is integrally formed at the front end of the broken nail. A rotator is provided at the position where the end of the extraction mechanism passes through the nail head. A rotating shaft is provided between the extraction mechanism and the rotator. A nail tail is integrally formed at the rear end of the intramedullary nail.

[0006] Preferably, a card slot is provided in the middle of the nail tail. A reinforcing rib is integrally formed at the bottom of the screwdriver assembly. A clamping member is integrally formed at the bottom of the reinforcing rib. A reserved groove is provided in the middle of the reinforcing rib. The clamping member matches the card slot.

[0007] Preferably, the broken nail and the nail head are integrally formed by casting. The intramedullary nail and the nail tail are integrally formed by casting. The intramedullary nail, the broken nail, and the hollow groove are all integrally formed.

[0008] Preferably, the rotator rotates and moves at the end position of the extraction mechanism through a rotating shaft. When the extraction mechanism passes through the hollow groove, the rotator is flush with the extraction mechanism. After the extraction mechanism passes through the hollow groove, the rotator and the extraction mechanism are locked and fixed by the thread at the distal end.

[0009] Preferably, when the rotator and the extraction mechanism are in a vertical state and locked, pull the extraction mechanism backward to combine the intramedullary nail with the extraction mechanism. At this time, the fracture groove is in a closed state.

[0010] Preferably, the screwdriver assembly drives the position of the nail tail to rotate and move through the clamping part and the clamping groove to extract the intramedullary nail and the broken nail, and the clamping part is engaged with the clamping groove.

[0011] Compared with the prior art, the present utility model provides an intramedullary nail broken nail extraction device, which has the following beneficial effects: the intramedullary nail broken nail extraction device enters the intramedullary nail along the hollow part inside the intramedullary nail, reaches the distal end of the intramedullary nail directly after passing through the broken end at the distal end. After pulling the extraction device, the distal part of the device rotates along the axis, clamps the broken nail, and combines the intramedullary nail with the broken nail. At this time, after screwing in the screw core for fixation and then pulling out in the reverse direction, the intramedullary nail and the broken nail are taken out. The rotator rotates and moves at the end position of the extraction mechanism through a rotating shaft. When the extraction mechanism passes through the hollow groove, the rotator is flush with the extraction mechanism. After the extraction mechanism passes through the hollow groove, the rotator and the extraction mechanism are locked and fixed by the thread at the distal end. When the rotator and the extraction mechanism are in a vertical state and locked, pull the extraction mechanism backward to combine the intramedullary nail with the extraction mechanism. At this time, the fracture groove is in a closed state, and at the rear end, the intramedullary nail is pulled out in the reverse direction and taken out through the screwdriver assembly and the clamping part. The whole intramedullary nail broken nail extraction device has a simple structure, is convenient to operate, and has a better use effect than the traditional method. Description of the Drawings

[0012] Figure 1 It is a schematic diagram of the overall structure of an intramedullary nail broken nail extraction device of the present utility model.

[0013] Figure 2 It is a schematic diagram of the structure of the intramedullary nail and the broken nail in an intramedullary nail broken nail extraction device of the present utility model.

[0014] Figure 3 It is a schematic diagram of the structure of the extraction mechanism in an intramedullary nail broken nail extraction device of the present utility model.

[0015] Figure 4 It is a schematic diagram of the structure of the screwdriver assembly in an intramedullary nail broken nail extraction device of the present utility model.

[0016] Figure 5 It is a schematic diagram of the structure of the enlarged view at A in an intramedullary nail broken nail extraction device of the present utility model.

[0017] In the figure: 1, intramedullary nail; 2, extraction mechanism; 3, broken nail; 4, nail head; 5, rotator; 6, rotating shaft; 7, fracture groove; 8, hollow groove; 9, card slot; 10, reinforcing rib; 11, reserved groove; 12, screwdriver assembly; 13, clamping part; 14, nail tail. Specific embodiments

[0018] The technical solutions of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments.

[0019] As Figures 1-5 shown, an intramedullary nail broken nail extraction device includes an intramedullary nail 1, a broken nail 3, an extraction mechanism 2 and a screwdriver assembly 12. Hollow grooves 8 are provided in the middle parts of both the intramedullary nail 1 and the broken nail 3. A fracture groove 7 is provided at the fracture position between the intramedullary nail 1 and the broken nail 3. The extraction mechanism 2 passes through the hollow groove 8. A nail head 4 is integrally formed at the front end of the broken nail 3. A rotator 5 is provided at the position where the end of the extraction mechanism 2 passes through the nail head 4. A rotating shaft 6 is provided between the extraction mechanism 2 and the rotator 5. A nail tail 14 is integrally formed at the rear end of the intramedullary nail 1. The device enters the intramedullary nail along the hollow part inside the intramedullary nail, reaches the distal end of the intramedullary nail after passing through the fracture end at the distal end, pulls the extraction device, and then the distal part of the device rotates along the axis and clamps the broken nail to combine the intramedullary nail and the broken nail. At this time, after screwing in the screw core for fixation and then pulling out in the reverse direction, the intramedullary nail and the broken nail are taken out.

[0020] A card slot 9 is provided in the middle of the nail tail 14. A reinforcing rib 10 is integrally formed at the bottom of the screwdriver assembly 12. A clamping part 13 is integrally formed at the bottom of the reinforcing rib 10. A reserved groove 11 is provided in the middle of the reinforcing rib 10. The clamping part 13 matches the card slot 9.

[0021] The broken nail 3 and the nail head 4 are integrally formed by casting. The intramedullary nail 1 and the nail tail 14 are integrally formed by casting. The intramedullary nail 1, the broken nail 3 and the hollow groove 8 are all integrally formed.

[0022] The rotator 5 rotates and moves at the end position of the extraction mechanism 2 through the rotating shaft 6. When the extraction mechanism 2 passes through the hollow groove 8, the rotator 5 is flush with the extraction mechanism 2. After the extraction mechanism 2 passes through the hollow groove 8, the rotator 5 and the extraction mechanism 2 are locked and fixed by the threads at the distal end.

[0023] When the rotator 5 and the extraction mechanism 2 are in a vertical state and locked, pull the extraction mechanism 2 backward to combine the intramedullary nail 1 and the extraction mechanism 2. At this time, the fracture groove 7 is in a closed state.

[0024] The screwdriver assembly 12 drives the nail tail 14 to rotate and move through the clamping part 13 and the card slot 9 to take out the intramedullary nail 1 and the broken nail 3, and the clamping part 13 is engaged with the card slot 9.

[0025] Working principle: The utility model includes an intramedullary nail 1, a removal mechanism 2, a broken nail 3, a nail head 4, a rotator 5, a rotating shaft 6, a fracture groove 7, a hollow groove 8, a clamping groove 9, a reinforcing rib 10, a reserved groove 11, a screwdriver assembly 12, a clamping member 13, and a nail tail 14. The rotator 5 rotates and moves at the end of the removal mechanism 2 through the rotating shaft 6. When the removal mechanism 2 passes through the position of the hollow groove 8, the rotator 5 is flush with the removal mechanism 2. After the removal mechanism 2 passes through the hollow groove 8, the rotator 5 and the removal mechanism 2 are locked and fixed by the thread at the distal end. When the rotator 5 and the removal mechanism 2 are in a vertical state and locked, the removal mechanism 2 is pulled backward to combine the intramedullary nail 1 with the removal mechanism 2. At this time, the fracture groove 7 is in a closed state, and the intramedullary nail 1 is pushed and removed in the reverse direction by the screwdriver assembly 12 and the clamping member 13 at the rear end. The device enters the intramedullary nail along the hollow part inside the intramedullary nail, reaches the distal end of the intramedullary nail directly through the broken end at the distal end. After pulling the removal device, the distal part of the device rotates along the axis and clamps the broken nail, combining the intramedullary nail with the broken nail. At this time, after screwing in the screw core for fixation and then pushing and pulling in the reverse direction, the intramedullary nail and the broken nail are removed.

[0026] The above shows and describes the basic principle, main features and advantages of the present utility model. Those skilled in the art of this industry should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed.

Claims

1. A broken intramedullary nail removal device, comprising an intramedullary nail (1), a broken nail (3), a removal mechanism (2) and a screwdriver assembly (12), characterized in that: A hollow groove (8) is provided in the middle of the intramedullary nail (1) and the broken nail (3); a broken groove (7) is provided at the broken position between the intramedullary nail (1) and the broken nail (3); at the position where the removal mechanism (2) passes through the hollow groove (8), a nail head (4) is integrally formed at the front end of the broken nail (3); a rotator (5) is provided at the position where the end of the removal mechanism (2) passes through the nail head (4); a rotating shaft (6) is provided between the removal mechanism (2) and the rotator (5); a nail tail (14) is integrally formed at the rear end of the intramedullary nail (1); the rotator (5) is rotatable at the end position of the removal mechanism (2) via the rotating shaft (6); when the removal mechanism (2) passes through the hollow groove (8), the rotator (5) and the removal mechanism (2) are flush; and after the removal mechanism (2) passes through the hollow groove (8), the rotator (5) and the removal mechanism (2) are locked and fixed via a distal thread.

2. The broken intramedullary nail removal device according to claim 1, characterized in that: A slot (9) is provided in the middle of the nail tail (14), a reinforcing rib (10) is integrally formed at the bottom of the screwdriver assembly (12), a clamping piece (13) is integrally formed at the bottom of the reinforcing rib (10), a reserved slot (11) is provided in the middle of the reinforcing rib (10), and the clamping piece (13) matches the slot (9).

3. The broken intramedullary nail removal device according to claim 1, characterized in that: The broken nail (3) and the nail head (4) are integrally formed by casting, the intramedullary nail (1) and the nail tail (14) are integrally formed by casting, and the intramedullary nail (1), the broken nail (3) and the hollow groove (8) are integrally formed.

4. The broken intramedullary nail removal device according to claim 1, characterized in that: When the rotator (5) and the removal mechanism (2) are in a vertical state and locked, the removal mechanism (2) is pulled backwards to combine the intramedullary nail (1) with the removal mechanism (2), and at this time, the fracture groove (7) is in a closed state.

5. The broken intramedullary nail removal device according to claim 2, characterized in that: The screwdriver assembly (12) drives the position of the nail tail (14) to rotate and remove the intramedullary nail (1) and the broken nail (3) through the clamping piece (13) and the clamping slot (9), and the clamping piece (13) and the clamping slot (9) are clamped.

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