Bad nail taking-out device for orthopedics department

Abstract

The invention discloses an orthopedic bad nail taking-out device which comprises a supporting piece, a fixing mechanism, a sliding assembly and a universal arm, and the fixing mechanism can be connected with a bone rod exposed out of an operative incision of a patient; the supporting piece is connected with the fixing mechanism, and the universal arm is slidably connected with the supporting piece through the sliding assembly so that the height of the universal arm can be adjusted. The free end of the universal arm is connected with a grinding shape limiting frame, and the grinding shape of the grinding head at the broken nail head is regulated through the grinding shape limiting frame. According to the device, bone holding forceps are used at the incision of a patient to clamp the bone exposed out of the incision, the height of the universal arm is adjusted by adjusting the position of the sliding assembly, the universal arm is bent to be kept at the proper position, and the grinding shape limiting frame can be aligned to the position of the head of a broken nail at the proper position; and a grinding head is used for grinding a polygonal shape in the grinding shape limiting frame, and then a wrench matched with the polygonal shape is used for screwing out the broken nail. The device has the technical effects that the operation is relatively easy, and no additional injury is caused to a patient.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and more particularly to a device for removing damaged orthopedic nails. Background Art

[0002] In orthopedic surgery, plates and screws are often used for internal fixation to assist patients in recovery. Once the bone heals, the plates and screws need to be removed. During removal, the screws bind to the newly formed bone tissue, creating a strong connection between the screws and the bone. This also makes screw breakage and thread slipping more likely to occur during screw removal.

[0003] To successfully remove the screw in this situation, existing technologies, such as the Chinese invention patent (CN103750897 A) for a novel broken screw removal device for orthopedic internal fixation screws, typically utilize a reverse tapping technique. However, tapping the reverse tapping technique is complex, and requires deep penetration into the broken screw, requiring significant force, which can cause additional damage to the newly healed bone. Summary of the Invention

[0004] The main purpose of the present invention is to address the above defects and shortcomings by grinding a limiting frame to regulate the polygonal boundary of the grinding head, thereby grinding out a polygonal shallow groove that can fit the wrench, thereby solving the technical problem of unscrewing the broken nail head.

[0005] Based on this, the present invention provides a device for removing damaged orthopedic nails.

[0006] In order to achieve the above purpose, the specific technical solution adopted by the present invention is: The device for removing broken orthopedic nails described in the present invention includes a support member, a fixing mechanism, a sliding assembly, and a universal arm. The fixing mechanism can be connected to the bone rod exposed by the patient's surgical incision; the support member is connected to the fixing mechanism, and the universal arm is slidably connected to the support member through the sliding assembly to adjust the height of the universal arm; the free end of the universal arm is connected to a grinding limiting frame, and the grinding limiting frame regulates the grinding shape of the grinding head at the broken nail head.

[0007] Preferably, the free end of the universal arm is connected to a grinding module, and the grinding module includes a die sleeve and a connecting plate, and the connecting plate is detachably connected to the free end of the universal arm.

[0008] Preferably, the connecting plate is detachably connected to the free end of the universal arm via bolts.

[0009] Preferably, the mold sleeve is configured to be in a semi-cylindrical shape, and the semi-cylindrical mold sleeve can leave operating space for the grinding head to grind broken nails.

[0010] Preferably, the polishing limit frame is configured to be a triangle, a quadrilateral, a pentagon, or a polygon.

[0011] Preferably, the main body of the universal arm is composed of multiple universal joints, one end of which is set as the module mounting end, and the other end is set as the mounting joint. Each universal joint is set in a cylindrical shape, one end of which is set as a spherical head, and the other end is set as a spherical groove. The spherical heads and spherical grooves of two adjacent universal joints are fit together, and each universal joint is provided with a longitudinal through-hole, and multiple universal joints are strung together by a rope. One end of the rope is connected to the module mounting end, and the other end passes through the mounting joint and can move freely.

[0012] Preferably, the universal joint is provided with an avoidance platform, and adjacent universal joints form an avoidance space at the avoidance platform, providing movable space between the universal joints.

[0013] Preferably, the sliding assembly includes a sleeve, a first locking handle, a second locking handle, a sleeve hole, and an accommodating cavity. The first locking handle is threadedly connected to the sleeve through a second threaded rod, and the second locking handle is threadedly connected to the sleeve through a third threaded rod. The third threaded rod penetrates into the accommodating cavity and is connected to one end of the rope. The mounting node is installed in the accommodating cavity.

[0014] Preferably, the support member is configured as a support rod.

[0015] Preferably, the fixing mechanism is configured as a bone clamp, and the bone clamp includes a first bone clamp; or the bone clamp includes a first bone clamp and a second bone clamp; the first bone clamp is connected to the support rod, and the second bone clamp is connected to the free end of the universal arm.

[0016] Preferably, the bone holding forceps includes a fixed handle and a movable handle, the fixed handle is connected to the support rod, the movable handle and the fixed handle are connected by a pin, the ends of the fixed handle and the movable handle form a forceps head for clamping the bone rod, and the forceps head includes a first jaw and a second jaw.

[0017] Preferably, a locking mechanism is provided between the movable pliers handle and the fixed pliers handle, and the locking mechanism includes a first threaded rod, a tightening bolt, a lug provided on the movable pliers handle, and a strip hole provided on the fixed pliers handle. One end of the first threaded rod is hinged to the lug, and the other end passes through the strip hole and is threadedly connected to the tightening bolt.

[0018] Preferably, the fixing mechanism includes a base body and a fourth threaded rod. The base body is connected to the support rod and can be socketed with the bed railing. The fourth threaded rod is threadedly connected to the base body, and the base body is fixed to the bed railing by tightening the fourth threaded rod.

[0019] Preferably, the orthopedic nail removal device further comprises a wrench, the wrench comprising a twisting end and a reverse thread piece, the shape of the twisting end matches the shape of the grinding limiting frame, and the reverse thread piece is provided at the end of the twisting end.

[0020] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, at the patient's incision, a bone clamp is used to clamp the exposed bone at the incision, the position of the sliding component is adjusted to adjust the height of the universal arm, and the universal arm is bent to keep it in a suitable position. The suitable position is to align the grinding limit frame with the position of the broken nail head, and a polygonal shape is ground out in the grinding limit frame using a grinding head. Then, a wrench that is compatible with the polygonal shape is used to screw out the broken nail. In the prior art, the broken nail is generally treated by tapping in a reverse thread and using reverse torque to remove the broken nail. However, the tapping in reverse thread operation requires high requirements and requires a deep tapping, and the external force applied is large, which is likely to cause additional damage to the patient's bone. The present invention only grinds out a shallow, but large, and angular polygonal frame on the surface of the broken nail head, which can cope with most broken nail removal situations. It has the technical effect of being easier to operate and causing no additional damage to the patient.

[0021] The present invention will be further described below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the structure of a device for removing broken orthopedic nails in a preferred embodiment of the present invention.

[0023] Figure 2 This is a schematic structural diagram of another device for removing broken orthopedic nails in a preferred embodiment of the present invention.

[0024] Figure 3 This is a structural schematic diagram of an orthopedic broken nail removal device from another perspective in a preferred embodiment of the present invention.

[0025] Figure 4 Schematic diagram of the structure of the sliding assembly in a preferred embodiment of the present invention.

[0026] Figure 5 Schematic diagram of the longitudinal cross-sectional structure of the sliding assembly in a preferred embodiment of the present invention.

[0027] Figure 6 Schematic diagram of the structure of the universal arm and the cross section along AA in a preferred embodiment of the present invention.

[0028] Figure 7 for Figure 6 Schematic diagram of the locally enlarged structure at point A in the middle.

[0029] Figure 8Schematic diagram of the structure of the universal arm and the grinding module in a preferred embodiment of the present invention.

[0030] Figure 9 Schematic diagram of the structure of another orthopedic nail removal device in a preferred embodiment of the present invention.

[0031] Figure 10 This is a structural schematic diagram of an orthopedic nail removal device from another perspective in a preferred embodiment of the present invention.

[0032] Figure 11 for Figure 10 Schematic diagram of the locally enlarged structure at point B in the middle.

[0033] Figure 12 Schematic diagram of the structure of a broken nail head in a preferred embodiment of the present invention.

[0034] Figure 13 Schematic diagram of the longitudinal cross-section structure of a broken nail in a preferred embodiment of the present invention.

[0035] Figure 14 Schematic diagram of the structure of a wrench and a broken nail in a preferred embodiment of the present invention.

[0036] Figure 15 Schematic diagram of the structure of a wrench in a preferred embodiment of the present invention.

[0037] Figure 16 This is a schematic structural diagram of another wrench in a preferred embodiment of the present invention.

[0038] Description of reference numerals: 10 support rod, 20 bone holding forceps, 21 first bone holding forceps, 22 second bone holding forceps, 23 fixed forceps handle, 24 movable forceps handle, 25 first forceps flap, 26 second forceps flap, 30 universal arm, 31 module mounting end, 32 universal joint, 321 spherical head, 322 spherical groove, 323 through-hole, 324 avoidance platform, 33 mounting joint, 40 sliding assembly, 41 sleeve, 42 first locking handle, 43 second locking handle, 44 sleeve hole, 45 accommodating cavity, 46 second threaded rod, 47 third threaded rod, 50 grinding module, 51 mold sleeve, 52 connecting plate, 53 grinding limiting frame, 60 locking mechanism, 61 first threaded rod, 62 tightening bolt, 63 lug, 64 bar hole, 71 seat, 72 fourth threaded rod, 80 wrench, 81 twisting end, 82 reverse thread piece, 90 broken nail, 91 polygonal groove, 92 reverse thread hole. DETAILED DESCRIPTION

[0039] The present invention will be further explained and illustrated below through specific implementation methods. It should be understood that the purpose of the following implementation methods is to make the technical solutions of the present invention clearer and easier to understand, and does not limit the scope of protection of the claims.

[0040] The present invention will be further described below with reference to specific examples. Example

[0041] This embodiment provides an orthopedic screw removal device, comprising a support rod 10, a bone clamp 20, and a universal arm 30. The bone clamp 20 comprises a first bone clamp 21 and a second bone clamp 22. The first bone clamp 21 is connected to one end of the support rod 10, and the second bone clamp 22 is connected to the free end of the universal arm 30. The first bone clamp 21 is used to clamp the bone exposed at the incision during the patient's surgery, and its function is to provide a support base; the second bone clamp 22 can be selectively used or not depending on the firmness of the universal arm 30. That is, if the entire device is not stable enough during surgery due to the fixation of only the first bone clamp 21, the second bone clamp 22 can be installed to clamp the bone to maintain the stability of the entire device.

[0042] It should be noted that the bad nails 90 include broken nails and screws with stripped threads on the nail heads.

[0043] The orthopedic nail removal device further includes a sliding assembly 40 , and the universal arm 30 and the support rod 10 are slidably connected via the sliding assembly 40 , thereby adjusting the height of the universal arm 30 .

[0044] The free end of the universal arm 30 is configured as a module mounting end 31, to which a polishing module 50 is detachably connected. The polishing module 50 includes a die sleeve 51 and a connecting plate 52, which is detachably connected to the module mounting end 31 via bolts. This detachable connection allows for replacement of different die sleeves 51 to accommodate different polishing requirements.

[0045] Specifically, the die sleeve 51 is configured in a semi-cylindrical shape, which can leave operating space for the grinding head to grind the broken nail head.

[0046] Specifically, the mold sleeve 51 is connected to a polishing limiting frame 53 .

[0047] More specifically, the polishing limiting frame 53 can be connected to the mold sleeve 51 by integral molding, welding, or clamping.

[0048] Specifically, the polishing limiting frame 53 can be set to a triangle, or a polygon such as a quadrilateral or a pentagon.

[0049] The usage is: At the patient's incision, the first bone clamp 21 is used to clamp the exposed bone at the incision. The position of the sliding assembly 40 is adjusted to adjust the height of the universal arm 30. The universal arm 30 is bent to maintain the appropriate position. The appropriate position is to align the grinding limit frame 53 with the position of the broken nail head. The grinding head is used to grind a polygonal shape within the grinding limit frame 53. Then, a wrench suitable for the polygonal shape is used to unscrew the broken nail. If the broken nail is particularly firmly embedded in the bone, the technique of inserting a reverse thread can be combined with the technique of unscrewing the broken nail.

[0050] In the prior art, broken nails are typically removed by tapping with a reverse screw and applying reverse torque. However, tapping with a reverse screw requires high manipulation and requires deep penetration, exerting significant force and potentially causing additional damage to the patient's bones. The present invention, by simply grinding a shallow, large, and angular polygonal frame onto the surface of the broken nail head, can address most broken nail removal scenarios, making the operation easier and causing no additional damage to the patient.

[0051] In addition, when the broken nail or the slipped nail is severely damaged, a wrench 80 with a reverse thread piece 82 can be used. The screwing end 81 of the wrench 80 fits into the polished polygonal groove 91, and the reverse thread piece 82 penetrates into the reverse thread hole 92 drilled out. Through the combination of the reverse thread means and the polygonal groove 91, the broken nail or the slipped nail is removed by applying force together.

[0052] In addition, the fixing mechanism can also be in the form of an assembly of a base body 71 and a fourth threaded rod 72. The notch of the base body 71 is sleeved on the bed rod at the edge of the bed, and then the fourth threaded rod 72 is tightened to fix the support rod 10, and then the universal arm 30 is twisted to align the grinding limiting frame 53 with the nail head of the broken nail 90.

[0053] Specifically, the main body of the universal arm 30 is composed of multiple universal joints 32, one end of which is configured as a module mounting end 31 and the other end is configured as a mounting joint 33. Each universal joint 32 is cylindrical in shape, with one end configured as a spherical head 321 and the other end configured as a spherical groove 322. The spherical heads 321 and spherical grooves 322 of two adjacent universal joints 32 are connected in a mating manner. In addition, each universal joint 32 is provided with a longitudinal through-hole 323. The multiple universal joints 32 are strung together by a rope. One end of the rope is connected to the module mounting end 31, and the other end passes through the mounting joint 33 and is freely movable. When the bending state of the universal arm 30 needs to be fixed, the rope is tightened, and each universal joint 32 is in a tight fit, thereby locking the posture of the universal arm 30.

[0054] Specifically, a avoidance platform 324 is provided on the universal joint 32 , and adjacent universal joints 32 form a certain avoidance space at the avoidance platform 324 , providing movable space between the universal joints 32 .

[0055] Specifically, the sliding assembly 40 includes a sleeve 41, a first locking handle 42, a second locking handle 43, a socket hole 44, and a receiving chamber 45. The first locking handle 42 is threadedly connected to the sleeve 41 via a second threaded rod 46, and the second locking handle 43 is threadedly connected to the sleeve 41 via a third threaded rod 47. The third threaded rod 47 penetrates into the receiving chamber 45 and connects to one end of the rope. The mounting section 33 is mounted in the receiving chamber 45. Rotating the first locking handle 42 secures the sleeve 41 in place on the support rod 10, while rotating the second locking handle 43 pulls the rope, keeping it taut, thereby fixing the position of the universal arm 30.

[0056] Specifically, the bone holding forceps 20 includes a fixed handle 23 and a movable handle 24. The fixed handle 23 is connected to the support rod 10, and the movable handle 24 is connected to the fixed handle 23 through a pin. The ends of the fixed handle 23 and the movable handle 24 form a forceps head for clamping bone rods, and the forceps head includes a first jaw 25 and a second jaw 26.

[0057] Specifically, a locking mechanism 60 is provided between the movable pliers handle 24 and the fixed pliers handle 23. The locking mechanism 60 includes a first threaded rod 61, a tightening bolt 62, a lug 63 provided on the movable pliers handle 24, and a bar hole 64 provided on the fixed pliers handle 23. One end of the first threaded rod 61 is hinged to the lug 63, and the other end passes through the bar hole 64 and is threadedly connected to the tightening bolt 62. By rotating the tightening bolt 62, the distance between the fixed pliers handle 23 and the movable pliers handle 24 is adjusted, so that the pliers head can clamp the bone rod.

[0058] The present invention is described through embodiments, but does not constitute a limitation of the present invention. With reference to the description of the present invention, other changes to the disclosed embodiments are easy for professionals in this field to think of, and such changes should fall within the scope defined by the claims of the present invention.

Claims

1. A device for removing damaged orthopedic nails, characterized by: The invention comprises a support member, a fixing mechanism, a sliding assembly (40), and a universal arm (30), wherein the fixing mechanism can be connected to a bone rod exposed by a surgical incision of a patient; the support member is connected to the fixing mechanism, and the universal arm (30) and the support member are slidably connected via the sliding assembly (40) to adjust the height of the universal arm (30); the free end of the universal arm (30) is connected to a grinding limiting frame (53), and the grinding shape of the grinding head at the broken nail head is regulated by the grinding limiting frame (53).

2. The orthopedic nail removal device according to claim 1, characterized in that: The free end of the universal arm (30) is connected to a grinding module (50), the grinding module (50) comprises a die sleeve (51) and a connecting plate (52), the grinding limiting frame (53) is connected to the die sleeve (51), and the connecting plate (52) is detachably connected to the free end of the universal arm (30).

3. The orthopedic nail removal device according to claim 2, characterized in that: The connecting plate (52) is detachably connected to the free end of the universal arm (30) via bolts.

4. The orthopedic nail removal device according to claim 2, characterized in that: The die sleeve (51) is configured in a semi-cylindrical shape, and the semi-cylindrical die sleeve (51) can leave operating space for the grinding head to grind broken nails.

5. The orthopedic nail removal device according to claim 1, characterized in that: The polishing limiting frame (53) is configured to be a triangle, a quadrilateral, a pentagon, or a polygon.

6. The orthopedic nail removal device according to claim 1, characterized in that: The main body of the universal arm (30) is composed of a plurality of universal joints (32), one end of which is configured as a module mounting end (31) and the other end is configured as a mounting joint (33). Each universal joint (32) is configured in a cylindrical shape, one end of which is configured as a spherical head (321) and the other end is configured as a spherical groove (322). The spherical heads (321) and spherical grooves (322) of two adjacent universal joints (32) are fitted and connected. In addition, each universal joint (32) is provided with a longitudinally penetrating through hole (323). The plurality of universal joints (32) are strung together by a rope. One end of the rope is connected to the module mounting end (31) and the other end passes through the mounting joint (33) and is freely movable.

7. The orthopedic nail removal device according to claim 6, characterized in that: The sliding assembly (40) includes a sleeve (41), a first locking handle (42), a second locking handle (43), a sleeve hole (44), and an accommodating chamber (45). The first locking handle (42) is threadedly connected to the sleeve (41) through a second threaded rod (46), and the second locking handle (43) is threadedly connected to the sleeve (41) through a third threaded rod (47). The third threaded rod (47) penetrates into the accommodating chamber (45) and is connected to one end of the rope. The mounting section (33) is mounted in the accommodating chamber (45).

8. The orthopedic nail removal device according to claim 1, characterized in that: The fixing mechanism is configured as a bone clamp (20), wherein the bone clamp (20) comprises a first bone clamp (21); or the bone clamp (20) comprises a first bone clamp (21) and a second bone clamp (22); the first bone clamp (21) is connected to the support rod (10), and the second bone clamp (22) is connected to the free end of the universal arm (30).

9. The orthopedic nail removal device according to claim 1, characterized in that: The fixing mechanism comprises a seat body (71) and a fourth threaded rod (72), wherein the seat body (71) is connected to the support rod (10) and can be sleeved with the bed railing, and the fourth threaded rod (72) is threadedly connected to the seat body (71), and the seat body (71) is fixed to the bed railing by tightening the fourth threaded rod (72).

10. The orthopedic nail removal device according to claim 1, characterized in that: The orthopedic nail removal device further comprises a wrench (80), the wrench comprising a twisting end (81) and a reverse thread piece (82), the shape of the twisting end (81) matches the shape of the grinding limiting frame (53), and the reverse thread piece (82) is provided at the end of the twisting end (81).

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