Orthopedic screw removal device and method of use thereof

Abstract

The invention discloses an orthopedic screw removal device, comprising an external hexagonal head with a notch, a spanner body, and a spanner tail. The push bolt is rotated clockwise or counterclockwise to make a pressure block slide in a rectangular groove, so as to push the pressure block to protrude or retract. When the internal hexagonal ridge of the screw tail cap is damaged, the spanner slips when rotating, and the screw is difficult to remove, the push bolt is rotated clockwise to make the pressure block protrude, the volume of the external hexagonal head is increased, and the inner wall of the screw tail hole is squeezed. During the rotation of the spanner, the friction between the two is significantly increased, forming a tight fit, so that the screw is smoothly removed. For the first time to remove the screw, when the internal hexagonal ridge of the screw tail cap is intact, the pressure block can be retracted, and the nail removal device is used as a common external hexagonal spanner. When the screw is difficult to remove, the pressure block is protruded, and the friction between the pressure block and the inner wall of the screw tail hole is increased, so as to remove the screw. The application of the nail removal device can effectively shorten the operation time, reduce the risks of anesthesia, surgery and infection, and avoid the occurrence of complications such as infection and re-fracture.

Description

Technical Field

[0001] The invention belongs to the technical field of medical surgical instruments, and in particular relates to an orthopedic screw removal device.

[0002] The invention also relates to a method for using the orthopedic screw removal device. Background Art

[0003] Orthopedic surgery usually requires the use of plate screw fixation. Due to various reasons, the hexagonal ridge of the screw tail cap is often damaged, the hexagonal wrench slips, and the screw cannot be removed during the placement or removal of the plate screw. In recent years, with the increasing use of locking plate screws, it is not uncommon for the screw tail cap to be damaged and the screw removal to be difficult during surgery.

[0004] The main reasons for the damage of the screw tail cap and the difficulty in screw removal are as follows: 1. The guide is not installed correctly when using the locking screw, resulting in the insertion of the screw and the thread on the steel plate, resulting in "cold welding"; 2. The time interval between the removal of the steel plate screw and the first surgery is too long, even more than 10 years, and the bone and screw are tightly combined, especially the semi-threaded compression screw; 3. Premature activity after surgery causes the internal fixation screw to deform, but not break. 4. The operation is not standardized when installing the screw, the thread is not tapped or the thread is not tapped in place, and the screw is screwed in forcefully, which can easily deform the screw tail cap and make it difficult to remove; 5. When removing the screw, the residual callus and fibrous tissue in the screw tail are not completely cleaned, the screwdriver head is not completely inserted into the bottom of the tail cap, and the hexagonal ridge is damaged after twisting, and the wrench slips.

[0005] For the phenomenon that the hexagonal ridge of the tail cap of the screw is damaged and difficult to remove, the main clinical solutions are: 1. In principle, "whoever installed it should be asked to remove it", because they are familiar with the specifications of the screws and can match the screws and wrenches. Others need to make sufficient preparations before surgery when removing the screws, and be fully equipped with wrenches of different shapes (plum blossom, hexagonal, etc.) and different models to avoid difficulties in removal due to mismatch of screws and wrenches when removing the screws; 2. Fully expose and completely remove the callus and fibrous tissue in the tail hole of the screw, and completely insert the screwdriver head into the bottom of the tail cap; 3. Use a new hexagonal wrench, because the old ridge is worn, not easy to get stuck, and easy to slip; the above three points can only be used as preventive measures; 4. The use of reverse-threaded conical nail remover, the principle is to screw it into the tail hole of the screw in a counterclockwise direction, The more you twist it, the tighter it will fit with the tail hole of the screw. The screw can be removed after the two are firmly combined. However, the tail hole of the screw is usually shallow, and the reverse-threaded conical nail remover may not match the size of the tail hole of the screw, or it may not be firmly stuck after being screwed in. The screw still cannot be removed. At this time, you need to use an electric drill to deepen the tail hole of the screw and then try to remove it; 5. Use a tungsten steel drill bit to completely grind off the tail cap of the screw, first remove the steel plate, and then use a ring drill around the screw rod to separate the bone from the screw rod, and finally remove the screw rod; These methods have the following disadvantages: metal debris from the tail cap of the screw enters human tissue and is not easy to rinse clean; severe friction and heat cause local bone necrosis; prolonging the operation time and increasing the risks of anesthesia, surgery and infection, especially for elderly patients with underlying diseases; violent operation may cause re-fracture, etc. Summary of the invention

[0006] The purpose of the present invention is to provide an orthopedic screw removal device, which solves the problem that the hexagonal convex edge of the screw tail cap is damaged and the removal is difficult during the orthopedic screw removal process.

[0007] Another object of the present invention is to provide a method for using an orthopedic screw removal device.

[0008] The first technical solution adopted by the present invention is an orthopedic screw removal device, comprising a cylindrical wrench body, one end of the wrench body is connected to a wrench tail, the other end of the wrench body is provided with a notched external hexagonal head, a side wall of the wrench body close to one end of the notched external hexagonal head is provided with a push bolt perpendicular to the wrench body, the notch direction of the notched external hexagonal head is consistent with the long axis direction of the push bolt and is located on the opposite side of the push bolt;

[0009] A rectangular groove is also provided at one end of the wrench body close to the notched external hexagonal head, and a pressure block is embedded on one side of the rectangular groove. The cross-sectional area of ​​the pressure block is half of the rectangular groove, and the cross-sectional area of ​​the pressure block located at the part of the notched external hexagonal head is equal to the cross-sectional area of ​​the rectangular groove. The pressure block includes two parts, one part of the pressure block is located in the rectangular groove, and the other part of the pressure block is embedded in the notch of the notched external hexagonal head. The push bolt penetrates into the rectangular groove, and the push bolt is embedded in the pressure block. A fixing device is also provided on the inner surface of the pressure block for clamping the push bolt.

[0010] The present invention is also characterized in that:

[0011] The long axes of the wrench tail and the wrench body are perpendicular to each other, and the wrench body and the wrench tail are connected at the midpoint of the long axis of the wrench tail;

[0012] The connection end between the wrench body and the wrench tail is in the shape of a regular triangular prism, and grooves C are provided on three sides of the regular triangular prism;

[0013] The wrench tail is a hollow handle, and a groove D is provided at the bottom of the handle to match the finger. A connecting block is also provided at the midpoint of the long axis of the wrench tail, and a regular triangular through hole is provided on the connecting block to match the regular triangular prism. A metal spring is also provided on one side of the connecting block, and a convex block is provided on the surface of the metal spring to match the groove C on the three sides of the regular triangular prism. A round piece with a convex point is also provided at the end of the metal spring away from the connecting block;

[0014] The notch cross section of the notched external hexagonal head is a rectangle, the length of which is the length of the external hexagonal side, the width of which is the vertical distance from the center of the external hexagon to each side, and the length of the notch rectangle coincides with one side of the external hexagon;

[0015] The push bolt includes a push bolt head, a push bolt body and a push bolt tail. The push bolt head is a short cylinder, the push bolt body is a slender cylinder, the outer surface of the push bolt body is provided with threads, the wrench body is provided with a threaded hole matched with the outer thread of the push bolt body, the push bolt tail is a short cylinder, and the push bolt tail is located on the outer side wall of the lower end of the wrench body;

[0016] The end of the push bolt tail away from the push bolt head is also provided with a hexagonal hole;

[0017] A circular groove is arranged on the surface of the pressure block, the head of the push bolt is embedded in the circular groove, and the diameter of the circular groove is larger than the head of the push bolt;

[0018] The specific structure of the fixing device is as follows: the pressure block is located at the notch of the circular groove and is evenly provided with a plurality of grooves A, the grooves A are elongated rectangular grooves, and the grooves A all point to the center of the circular groove, and the grooves A are connected to the circular groove, a metal spring sheet is laid in the groove A, the area of ​​the groove A is slightly larger than the projected area of ​​the metal spring sheet, the depth of the groove A is consistent with the height of the metal spring sheet, a screw is provided at one end of the groove A away from the circular groove, the screw passes through the metal spring sheet and penetrates into one end of the groove A, a threaded hole A matching the screw is provided at one end of the groove A, and one end of the metal spring sheet is placed on the surface of the push bolt head to limit the push bolt head in the groove;

[0019] The specific structure of the fixing device is as follows: a plurality of elastic metal buckles are evenly distributed around the groove, the end of the elastic metal buckle is a triangular prism-shaped protrusion with a cross section of an equilateral right-angled triangle, the outer side of the equilateral right-angled triangle is flush with the outer side wall of the elastic metal buckle body, the inner side is protruding, and the side away from the groove is an inclined surface, and the side close to the groove is a vertical surface, and the elastic metal buckle restricts the push-up bolt head in the groove;

[0020] A circular groove B is also provided in the rectangular groove, which is opposite to the groove. The diameter of the groove B is slightly larger than the diameter of the circle formed by the outer edges of multiple elastic metal buckles, and the depth of the groove B is consistent with the height of the metal buckle protruding from the surface of the pressure block.

[0021] The second technical solution adopted by the present invention is a method for using an orthopedic screw removal device, which adopts the above-mentioned orthopedic screw removal device and is specifically implemented according to the following steps:

[0022] Step 1, when removing screws in orthopedics, if the hexagonal ridge of the screw tail cap is damaged, the ordinary wrench slips when turning, and the screw is difficult to remove, first select a wrench body with a notched external hexagonal head that matches the size of the hexagonal inner hole at the tail end of the screw, insert one end of the triangular prism of the wrench body into the connecting block of the wrench tail, and hear a "click". At this time, the wrench body and the wrench tail are successfully connected as one, and then put the notched external hexagonal head into the hexagonal hole at the tail end of the screw, observe the hexagonal marks in the hexagonal hole at the tail end of the screw, and match the external hexagonal edge of the notched external hexagonal head with the former. If the hexagonal hole at the tail end of the screw has been completely ground into a round hole, then put the notched external hexagonal head completely into the hole;

[0023] Step 2: Hold the end of the wrench firmly so that the notched hexagonal head is completely located in the hexagonal hole at the end of the screw. Insert the matching L-shaped wrench into the hexagonal hole at the end of the push bolt and tighten the push bolt in a clockwise direction. At this time, the push bolt pushes the pressure block outward, so that the wrench head is completely clamped with the screw tail hole;

[0024] Step 3: Turn the wrench tail counterclockwise, and the screw will rotate synchronously with the wrench tail, and the screw can be taken out; if the wrench tail slips during the process of turning the wrench tail, further tighten the push bolt, and turn the wrench tail and tighten the push bolt alternately until the screw is completely taken out;

[0025] Step 4. After the screw is taken out, insert the matching L-shaped wrench into the hexagonal hole at the tail of the push bolt and turn the push bolt counterclockwise. At this time, the push bolt drives the pressure block to retract inward, so that the wrench head is separated from the screw. Press the raised side of the disc with raised dots on the tail of the wrench to separate the wrench tail from the wrench body, which is convenient for cleaning, disinfection and reuse.

[0026] The beneficial effects of the present invention are:

[0027] An orthopedic screw removal device of the present invention is provided with an external hexagonal head with a notch. The volume of the external hexagonal head is increased by sliding of a pressure block, which squeezes the inner wall of the screw tail hole. During the rotation of the wrench, the friction between the two is significantly increased, forming a tight fit, so that the screw can be smoothly removed. For the first time of screw removal, when the internal hexagonal hole of the screw tail cap is intact, the pressure block can be retracted by rotating the push bolt counterclockwise, and the screw removal device can be used as an ordinary external hexagonal wrench. When the internal hexagonal convex edge of the screw tail cap is damaged and removal is difficult, the pressure block is protruded, and the friction between the pressure block and the inner wall of the screw tail hole is increased, so that the screw is removed. The application of the nail removal device can effectively shorten the operation time, reduce the risk of operation and infection, and avoid the occurrence of complications such as infection and re-fracture. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the general structure of an orthopedic screw removal device of the present invention;

[0029] Figure 2 A cross-sectional view of an external hexagonal head with a notch in an orthopedic screw removal device of the present invention;

[0030] Figure 3 This is a front view of an orthopedic screw removal device of the present invention;

[0031] Figure 4 It is a front view of a push-out bolt head in an orthopedic screw removal device of the present invention;

[0032] Figure 5 It is a horizontal cross-sectional view of a push bolt in an orthopedic screw removal device of the present invention;

[0033] Figure 6 This is an internal view of a metal spring used in a fixing device of an orthopedic screw removal device of the present invention;

[0034] Figure 7 This is an internal view of a metal buckle used as a fixing device in an orthopedic screw removal device of the present invention;

[0035] Figure 8 This is a schematic diagram of the structure of an orthopedic screw removal device of the present invention, in which a fixing device adopts an elastic metal buckle;

[0036] Fig. 9 This is a schematic diagram of the connection between the wrench tail and the wrench body in an orthopedic screw removal device of the present invention;

[0037] Fig.10 It is a structural schematic diagram of a wrench body in an orthopedic screw removal device of the present invention;

[0038] Fig.11 A cross-sectional view of a wrench tail in an orthopedic screw removal device of the present invention;

[0039] Fig.12 The present invention is a schematic structural diagram of a connecting block in an orthopedic screw removal device.

[0040] In the figure, 1. notched hexagonal head, 2. wrench body, 3. wrench tail, 4. rectangular groove, 5. threaded hole, 6. push bolt, 6-1. push bolt head, 6-2. push bolt body, 6-3. push bolt tail, 6-4. hexagonal hole, 7. pressure block, 7-1. groove, 7-2. groove A, 7-3. threaded hole A, 8. screw, 9. metal spring sheet, 10. groove B, 11. metal buckle, 12. connecting block, 13. equilateral triangle through hole, 14. metal spring sheet, 15. groove C, 16. groove D, 17. round piece with raised dots. DETAILED DESCRIPTION

[0041] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] The present invention provides an orthopedic screw removal device, such as Figure 1 and Figure 2 As shown, it includes a notched hexagonal head 1, a wrench body 2, and a wrench tail 3; wherein the long axes of the wrench tail 3 and the wrench body 2 are perpendicular to each other, and the two are connected at the midpoint of the long axis of the wrench tail 3;

[0043] like Fig.10 As shown, the connection end between the wrench body 2 and the wrench tail 3 is in the shape of a regular triangular prism, and grooves C15 are provided on three sides of the regular triangular prism;

[0044] The wrench tail 3 is a hollow handle to increase the force-bearing area. The edge cross section is circular. A groove D16 is provided at the bottom of the handle to match the fingers. A connecting block 12 is also provided at the midpoint of the long axis of the wrench tail 3. Fig.11 As shown, Fig.12 The connecting block 12 is provided with a regular triangular through hole 13 that matches the regular triangular prism, and a metal spring 14 is also provided on one side of the connecting block 12. The surface of the metal spring 14 is provided with a protrusion that matches the groove C15 on the three sides of the regular triangular prism, and the long axis direction of the protrusion is parallel to the long axis direction of the wrench tail 3, as shown in FIG. Fig. 9 The metal spring piece 14 and the wrench tail 3 are located in the same plane. A round piece 17 with a convex point is also provided at one end of the metal spring piece 14 away from the connection block 12. When the wrench body 2 enters the connection block 12 and is pushed upward, it will automatically lock. When the two are released, just press the metal spring piece 14 with a convex point. There are wrench heads of different sizes, and the movable connection is convenient for replacement.

[0045] A push bolt 6 is provided on the side wall of one end of the wrench body 2 close to the notched external hexagonal head 1, and its long axis direction is consistent with the long axis direction of the wrench tail 3. The notch opening direction of the notched external hexagonal head 1 is consistent with the long axis direction of the push bolt 6 and is located on the opposite side of the push bolt 6. The notch cross-section of the notched external hexagonal head 1 is a rectangle, whose length is the length of the external hexagon side and the width is the vertical distance from the center of the external hexagon to each side, and the length of the rectangle coincides with one side of the external hexagon.

[0046] like Figure 3-Figure 5 As shown, a rectangular groove 4 is provided at one end of the wrench body 2 close to the notched external hexagonal head 1, and its cross section is equal to the cross-sectional area of ​​the notch of the notched external hexagonal head 1. A threaded hole 5 is also provided on the side wall of the end of the wrench body 2 close to the notched external hexagonal head 1, and its threaded hole opening direction is parallel to the long axis direction of the wrench tail 3 and is located on the opposite side of the notch of the notched external hexagonal head 1. A push bolt 6 is provided in the threaded hole 5, including a push bolt head 6-1, a push bolt body 6-2, a push bolt tail 6-3 and a hexagonal hole 6-4; wherein the push bolt head 6-1 is a short cylinder, located in the groove 7-1, and the surface in contact with the groove 7-1 is flat and smooth; the push bolt body 6-2 is an elongated cylinder with threads matching the threaded hole 5; The top bolt tail 6-3 is a short cylinder, located on the side wall of the lower end of the wrench body 2, one end of which is connected to the push bolt body 6-2, and the other end is provided with a hexagonal hole 6-4, a slidable pressure block 7 is provided inside the rectangular groove 4, the lower end of the pressure block 7 is expanded, and the cross-sectional area and height are equal to those of the notch of the notched external hexagonal head 1, and the two can be combined into a regular hexagon when close together, the upper end of the pressure block 7 is slender, and its cross-sectional area is half of the rectangular groove 4, and the middle part of the pressure block 7 facing the push bolt head 6-1 is provided with a circular groove 7-1, and its area is slightly larger than the bottom area of ​​the push bolt head 6-1, so that the push bolt head 6-1 can be allowed to rotate freely in the groove 7-1, and there is also a fixing device arranged on the surface of the pressure block 7 for clamping the push bolt head 6-1;

[0047] like Figure 6 , Figure 7As shown, the fixing device fixes the ejecting bolt 6 and the pressure block 7, and the specific structure is: the depth of the groove 7-1 is equal to the sum of the depth of the groove A7-2 and the thickness of the ejecting bolt head 6-1, the groove A7-2 is an elongated rectangular groove, a total of 4, evenly distributed around the groove 7-1 and pointing to the center of the groove 7-1, the groove A7-2 is far away from the groove 7-1. The side of the groove A7-2 is provided with a threaded hole A7-3, a screw 8 and a metal spring sheet 9, the threaded hole A7-3 matches the thread of the screw 8 and fixes the metal spring sheet 9 in the groove A7-2; the side of the groove A7-2 close to the groove 7-1 is connected with the groove 7-1, but the depth is shallower than the latter, the area of ​​the groove A7-2 is slightly larger than the projected area of ​​the metal spring sheet 9, and the depth is consistent with the height of the metal spring sheet 9, the metal spring sheet 9 restricts the ejecting bolt head 6-1 in the groove 7-1, and the ejecting bolt head 6-1 can rotate freely in the groove 7-1;

[0048] There is another solution for fixing the push bolt 6 and the pressure block 7 (such as Figure 7 , Figure 8 ):

[0049] There are multiple elastic metal buckles 11 evenly distributed around the groove 7-1. The end of the elastic metal buckle 11 is a triangular prism-shaped protrusion with a cross-section of an equilateral right triangle. The outer side of the equilateral right triangle is flush with the outer side wall of the body of the elastic metal buckle 11, and the inner side is protruding. The side away from the groove 7-1 is an inclined surface, and the side close to the groove 7-1 is a vertical surface. A circular groove B10 is also arranged in the rectangular groove 4. The groove B10 is opposite to the groove 7-1. The diameter of the groove B10 is slightly larger than the diameter of the circle formed by the outer edges of the multiple metal buckles. The depth of the groove B10 is consistent with the height of the metal buckle 11 protruding from the surface of the pressure block 7. The elastic metal buckle 11 limits the push-up bolt head 6-1 in the groove 7-1.

[0050] The present invention also provides a method for using an orthopedic screw removal device, which is implemented by using the orthopedic screw removal device according to the following steps:

[0051] Step 1, when removing screws in orthopedics, if the hexagonal ridges of the screw tail cap are damaged, the ordinary wrench slips when turned, and the screw is difficult to remove, first select a wrench body 2 with a notched hexagonal head 1 that matches the size of the hexagonal socket at the tail end of the screw, insert one end of the triangular prism of the wrench body 2 into the connecting block 12 of the wrench tail 3, and hear a "click". At this time, the wrench body 2 and the wrench tail 3 are successfully connected as one. Then put the notched external hexagonal head 1 into the hexagonal hole at the tail end of the screw. At this time, turning the wrench cannot drive the screw to rotate. Observe the hexagonal marks in the hexagonal hole at the tail end of the screw, and match the external hexagonal edge of the notched external hexagonal head 1 with the former. If the hexagonal hole at the tail end of the screw has been completely ground into a round hole, then put the notched external hexagonal head 1 completely into the hole;

[0052] Step 2, hold the wrench tail 3 firmly, make the notched hexagonal head 1 completely located in the hexagonal hole at the tail end of the screw, insert the matching L-shaped wrench into the hexagonal hole 6-4 located at the tail of the push bolt 6-3 and tighten the push bolt 6 in a clockwise direction, at this time, the push bolt 6 pushes the pressure block 7 to protrude outward, so that the wrench head is completely clamped with the tail hole of the screw;

[0053] Step 3, turn the spanner tail 3 counterclockwise, the screw will rotate synchronously with the spanner tail 3, and the screw can be taken out. If slippage still occurs during the process of turning the spanner tail 3, the push bolt 7 can be further tightened. Turning the spanner tail 3 and tightening the push bolt 7 can be performed alternately until the screw is completely taken out;

[0054] Step 4, after the screw is taken out, insert the matching L-shaped wrench into the hexagonal hole 6-4 located at the push bolt tail 6-3 and turn the push bolt 6 counterclockwise. At this time, the push bolt 6 drives the pressure block 7 to retract inward, so that the wrench head is separated from the screw, and the convex side of the disc 17 with convex dots on the wrench tail 3 is pressed to separate the wrench tail 3 and the wrench body 2, which is convenient for cleaning, disinfection and reuse.

[0055] The use process of the present invention is as follows: the present invention is an orthopedic screw removal device. When the hexagonal ridge of the screw tail cap is damaged, the wrench slips when it is turned, and the screw is difficult to remove, first select a wrench body 2 with a notched hexagonal head 1 that matches the size of the hexagonal inner corner of the screw tail end, insert one end of the triangular prism of the wrench body 2 into the connecting block 12 of the wrench tail 3, and hear a "click". At this time, the wrench body 2 and the wrench tail 3 are successfully connected as one. Put the notched external hexagonal head 1 into the hexagonal hole at the tail end of the screw, hold the wrench tail 3 firmly, so that the notched external hexagonal head 1 is completely located in the hexagonal hole at the tail end of the screw, insert the matching L-shaped wrench into the hexagonal hole 6-4 located at the push bolt tail 6-3 and tighten the push bolt 6 in the clockwise direction, turn the wrench tail 3 counterclockwise, the screw will rotate synchronously with the wrench tail 3, and the screw can be removed. If slippage still occurs during the process of twisting the spanner tail 3, the push bolt 7 can be further tightened, and twisting the spanner tail 3 and tightening the push bolt 7 can be performed alternately until the screw is completely removed. After the screw is removed, a matching L-shaped spanner is inserted into the hexagonal hole 6-4 located at the push bolt tail 6-3 and the push bolt 6 is twisted counterclockwise to separate the spanner head from the screw, and the side with the convex point of the disc with the convex point on the spanner tail 3 is pressed to separate the spanner tail 3 from the spanner body 2, so that it is easy to clean, disinfect and reuse.

Claims

1. An orthopedic screw removal device, characterized in that: The invention comprises a cylindrical wrench body (2), one end of the wrench body (2) is connected to a wrench tail (3), the other end of the wrench body (2) is a notched external hexagonal head (1), a push bolt (6) perpendicular to the wrench body (2) is arranged on the side wall of the wrench body (2) close to one end of the notched external hexagonal head (1), the notch direction of the notched external hexagonal head (1) is consistent with the long axis direction of the push bolt (6) and is located on the opposite side of the push bolt (6); A rectangular groove (4) is also provided at one end of the wrench body (2) close to the notched external hexagonal head (1), and a pressure block (7) is also embedded in one side of the rectangular groove (4). The cross-sectional area of ​​the pressure block (7) is half of the rectangular groove (4), and the cross-sectional area of ​​the pressure block (7) located at the notched external hexagonal head (1) is equal to the cross-sectional area of ​​the rectangular groove (4). The pressure block (7) includes two parts, one part of the pressure block (7) is located in the rectangular groove (4), and the other part of the pressure block (7) is embedded in the notch of the notched external hexagonal head (1). The push bolt (6) penetrates into the rectangular groove (4), and the push bolt (6) is embedded in the pressure block (7). The inner surface of the pressure block (7) is also provided with a fixed The invention discloses a device for clamping a push bolt (6); the long axes of the spanner tail (3) and the spanner body (2) are perpendicular to each other, and the spanner body (2) and the spanner tail (3) are connected at the midpoint of the long axis of the spanner tail (3); the connecting end of the spanner body (2) and the spanner tail (3) is in the shape of a regular triangular prism, and the three sides of the regular triangular prism are all provided with grooves C (15); the spanner tail (3) is a hollow handle, and the bottom of the handle is provided with a groove D (16) for matching with fingers, and a connecting block (12) is also provided at the midpoint of the long axis of the spanner tail (3), and the center of the connecting block (12) is provided with an equilateral triangular through hole (13) matching with the regular triangular prism at the upper end of the spanner body (2), and the connecting block (12) is located at the spanner A metal spring (14) is also provided on one side of the handle (3), the metal spring (14) and the handle (3) are located in the same plane, the metal spring (14) is located on the side of the connecting block (12) where the side of the equilateral triangle through hole (13) is parallel to the side of the connecting block (12), a convex block matching with the three-sided groove C (15) of the regular triangular prism is provided on the surface of the metal spring (14) near the center of the connecting block (12), the long axis direction of the convex block is parallel to the long axis direction of the handle (3), and a round piece (17) with a convex point is also provided on the end of the metal spring (14) away from the connecting block (12), and the convex point is located on the side near the center of the connecting block (12); the push bolt (6) includes a push bolt head (6) -1), a push bolt body (6-2) and a push bolt tail (6-3), the push bolt head (6-1) is a short cylinder, the push bolt body (6-2) is an elongated cylinder, the outer surface of the push bolt body (6-2) is provided with threads, a threaded hole (5) matching the outer thread of the push bolt body (6-2) is provided in the wrench body (2), the push bolt tail (6-3) is a short cylinder, and the push bolt tail (6-3) is located on the outer side wall of the lower end of the wrench body (2); a circular groove (7-1) is provided on the surface of the pressure block (7), the push bolt head (6-1) is embedded in the circular groove (7-1), and the diameter of the circular groove (7-1) is larger than the push bolt head (6-1).

2. The orthopedic screw removal device according to claim 1, characterized in that: The notch cross section of the notched external hexagonal head (1) is a rectangle, the length of which is the length of the external hexagonal side, the width of which is the vertical distance from the center of the external hexagon to each side, and the length of the notch rectangle coincides with one side of the external hexagon.

3. The orthopedic screw removal device according to claim 1, characterized in that: An end of the push bolt tail (6-3) away from the push bolt head (6-1) is also provided with a hexagonal hole (6-4).

4. The orthopedic screw removal device according to claim 1, characterized in that: The specific structure of the fixing device is as follows: the pressure block (7) is located at the notch of the circular groove (7-1) and is evenly and radially provided with a plurality of grooves A (7-2); the grooves A (7-2) are elongated rectangular grooves, and the grooves A (7-2) all point to the center of the groove (7-1), and the grooves A (7-2) are connected to the groove (7-1); a metal spring sheet (9) is laid in the groove A (7-2); the area of ​​the groove A (7-2) is larger than the projection area of ​​the metal spring sheet; The depth of A (7-2) is deeper than the height of the metal spring sheet (9); a screw (8) is arranged at one end of the groove A (7-2) away from the groove (7-1); the screw (8) passes through the metal spring sheet (9) and penetrates into one end of the groove A (7-2); a threaded hole A (7-3) matched with the screw (8) is arranged at one end of the groove A (7-2); one end of the metal spring sheet (9) is placed on the surface of the push-up bolt head (6-1) to restrict the push-up bolt head (6-1) in the groove (7-1).

5. The orthopedic screw removal device according to claim 4, characterized in that: The specific structure of the fixing device is as follows: a plurality of elastic metal buckles (11) are evenly distributed in a circular shape around the groove (7-1); the end of the elastic metal buckle (11) is a triangular prism-shaped protrusion with a cross section of an equilateral right-angled triangle; the side surface where one of the right-angled sides is located is flush with the outer side wall of the body of the elastic metal buckle (11); one edge of the triangular prism protrudes toward the center direction of the groove (7-1); the side of the triangular prism away from the groove (7-1) is an inclined surface; the side close to the groove (7-1) is perpendicular to the body of the elastic metal buckle (11); the elastic metal buckle (11) restricts the push-up bolt head (6-1) in the groove (7-1).

6. The orthopedic screw removal device according to claim 5, characterized in that: A circular groove B (10) is also provided in the rectangular groove (4), the groove B (10) being opposite to the groove (7-1), the diameter of the groove B (10) being not less than the diameter of a circle formed by the outer edges of the plurality of metal buckles (11), and the depth of the groove B (10) being consistent with the height of the metal buckles (11) protruding from the surface of the pressure block (7).

Images