A positioning device for fracture reduction

Abstract

An embodiment of the present disclosure provides a positioning device for fracture reduction, including two first positioning components. Each first positioning component includes: a first fixing block, which includes a first fixing block body, a first mounting portion fixedly connected to the first fixing block body, and a first locking portion. Among them, a first through hole for a steel needle to pass through is formed on the first fixing block body; the first locking portion is used to relatively fix the first fixing block and the steel needle passing through the first through hole; a first registration block, which includes a second mounting portion pivotally connected to the first mounting portion, a first registration block body fixedly connected to the second mounting portion, and at least two marking balls spaced apart on the first registration block body; and a first identification plate, which is detachably fixed to the side of the first registration block body away from the first fixing block, and the first identification plate is provided with positioning marks. Through this solution, the reduction effect of fracture reduction can be improved.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to the technical field of medical devices, and in particular, to a positioning device for fracture reduction. Background Art

[0002] A fracture or broken bone refers to a complete or partial break in the continuity of the bone structure. It is more common in children and the elderly, and also occurs in young and middle-aged people from time to time. Patients usually have a fracture in one part, and a small number have multiple fractures. With timely and appropriate treatment, most patients can recover their original function, and a small number of patients may have different degrees of sequelae.

[0003] For patients with fractures and broken bones, the usual treatment methods include two stages. First, the fracture site is reduced and closed; then, the reduced and closed fracture site is fixed. For example, internal fixation is performed using intramedullary nails, steel plates, etc., or external fixation is performed using external fixation brackets, plaster, etc. There are various methods for reduction. For example, reduction can be performed by the doctor's feel based on the doctor's experience; or, with the aid of intraoperative X-ray fluoroscopy, manual reduction under fluoroscopy can be performed; in addition, the skin and soft tissues can be incised to perform open reduction when the fracture site can be seen.

[0004] Several existing reduction methods require directly or indirectly observing the position and specific shape of the fractured or broken bone part. However, the fractured or broken bone part is wrapped by the skin. If open reduction is used, the skin and tissues are incised, and visually locating the specific shape of the fractured or broken bone part causes great harm to the patient and the postoperative recovery time is relatively long. For other reduction methods, the specific shape of the fractured or broken bone part cannot be located visually. Specifically, if manual reduction is used, it entirely depends on the doctor's experience, and it is inevitable that the reduction may not be good; if the intraoperative X-ray fluoroscopy method is used to obtain the posture of the broken bone, the radiation damage to the doctor and the patient is increased, and the X-ray image only provides two-dimensional information and cannot fully understand the real-time three-dimensional spatial position of the broken bone.

[0005] Therefore, how to accurately determine the position and specific shape of the fractured or broken bone part without fluoroscopy or without opening the wound and peeling the tissue to improve the reduction effect of fracture reduction is an urgent problem to be solved at present. Summary of the Invention

[0006] The purpose of the embodiments of the present disclosure is to provide a positioning device for fracture reduction to improve the reduction effect of fracture reduction. The specific technical solution is as follows:

[0007] The embodiments of the present disclosure provide a positioning device for fracture reduction, including two first positioning components, and each of the first positioning components includes:

[0008] The first fixing block, the first fixing block includes a first fixing block body, a first mounting portion fixedly connected to the first fixing block body, and a first locking portion. Wherein, a first through hole for a steel needle to pass through is formed on the first fixing block body; the first locking portion is used to relatively fix the first fixing block and the steel needle passing through the first through hole;

[0009] The first registration block, the first registration block includes a second mounting portion pivotally connected to the first mounting portion and capable of being relatively fixed to the first mounting portion, a first registration block body fixedly connected to the second mounting portion, and at least two marker balls spaced apart on the first registration block body and capable of being developed in a scanned image of a CT scan; and,

[0010] The first identification plate is detachably fixed to a side of the first registration block body away from the first fixing block, and a positioning mark is provided on a side of the first identification plate away from the first fixing block.

[0011] In some embodiments, the first locking portion includes a first cylinder, a first locking nut, and a first collet;

[0012] The first cylinder is fixedly connected to the first fixing block body and coaxially arranged with the first through hole, and an external thread is provided on its outer surface; the first collet is located in the cavity of the first cylinder, and the first locking nut is threadedly coupled to the outer surface of the first cylinder.

[0013] In some embodiments, the first mounting portion includes a first bolt and a first connection end, and a second through hole is formed in the first connection end;

[0014] The second mounting portion includes a first bending portion provided on one side of the first registration block body and bent relative to the first registration block body; a first threaded hole corresponding to the second through hole is formed in the first bending portion;

[0015] The end face of the first connection end is opposite to the end face of the first bending portion; the first bolt passes through the second through hole and is threadedly connected to the first threaded hole.

[0016] In some embodiments, a first end face tooth is provided on the end face of the first connection end, and a second end face tooth is provided on the end face of the first bending portion; the first end face tooth and the second end face tooth are engaged with each other.

[0017] In some embodiments, the first registration block body is in a long strip plate-like structure; the number of the marker balls is two, and they are respectively arranged at two ends of the first registration block body along the length direction.

[0018] In some embodiments, a circular first positioning protrusion is provided at the position of the marking ball on the first registration block body; the marking ball is installed in the cavity of the first positioning protrusion;

[0019] A first positioning through hole matching with the first positioning protrusion is provided on the first identification plate.

[0020] In some embodiments, the first identification plate is in a strip-shaped plate structure, and the first identification plate includes a first identification plate body and two first protruding parts symmetrically arranged on both sides of the first identification plate body.

[0021] In some embodiments, identification marks are provided on the surface of the first registration block body away from the first fixing block and the surface of the first identification plate body close to the first fixing block.

[0022] In some embodiments, at least one second positioning component is further included; the second positioning component includes:

[0023] A second fixing block, which includes a second fixing block body, a third mounting part fixedly connected to the second fixing block body, and a second locking part. Wherein, a third through hole for a steel needle to pass through is provided on the second fixing block body; the second locking part is used to relatively fix the second fixing block and the steel needle passing through the third through hole;

[0024] A second registration block, which includes a fourth mounting part pivotally connected to the third mounting part and a second registration block body fixedly connected to the fourth mounting part; and,

[0025] A second identification plate, which is detachably fixed to the side of the second registration block body away from the second fixing block, and a positioning mark is provided on the side of the second identification plate away from the second fixing block.

[0026] In some embodiments, the first registration block, the first identification plate, the second registration block, and the second identification plate are all made of hard plastic.

[0027] The positioning device for fracture reduction provided by the embodiments of the present disclosure can be applied to two stages: before and during the operation of fracture reduction. Before the operation, a CT scan is performed on the first positioning component that is rigidly connected to the broken bone and on which the first identification plate is not installed, to obtain the coordinates of the marker balls in the CT coordinate system. Through CT data segmentation, the correspondence between the marker balls and the broken bone is obtained. During the operation, the first identification plate is installed on the first registration block of the first positioning component, and an optical navigation system (such as an infrared tracker, a binocular camera, a magnetic navigation locator, etc.) is used to track the six-degree-of-freedom (6DOF, Six degree of freedom) pose of the positioning markers on the first identification plate, to obtain the spatial coordinates of the positioning markers on the first identification plate in the system coordinate system of the optical navigation system. Using the positional relationship determined between the coordinates of the positioning markers on the first identification plate in the device coordinate system of the first positioning component and the coordinates of the marker balls in the CT coordinate system, the spatial correspondence between the broken bone and the positioning markers on the first identification plate in the first positioning component on the broken bone is determined. By using the optical navigation system to identify and track the positioning markers on the first identification plate of the first positioning component, the real-time tracking of the spatial pose of the broken bone can be achieved.

[0028] For the positioning device for fracture reduction provided by the embodiments of the present disclosure, since the two first positioning components are respectively installed on different broken bones, the distance between the two marker balls on one first positioning component and the two marker balls on the other positioning component is relatively large; and for each first positioning component, at least two marker balls can be arranged at intervals, and the interval distance between the two marker balls can also be relatively large, making the marker balls approximate to points, so as to reduce errors, accurately determine the position and specific shape of the fractured or broken bone part, and improve the reduction effect of fracture reduction.

[0029] In addition, since an optical navigation system is used to track the positioning markers of the positioning device during the operation to achieve the real-time tracking of the spatial pose of the broken bone, there is no need to use X-rays to fluoroscope the fracture site. Therefore, the radiation damage to the patient and the doctor during the reduction process can be reduced. Under the condition of reducing radiation damage, the accuracy of determining the positions and postures of the broken bones at the fracture site is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other embodiments can be obtained based on these drawings.

[0031] Figure 1 It is a schematic structural diagram of a positioning device for fracture reduction provided by the embodiments of the present disclosure installed on a broken bone;

[0032] Figure 2 is Figure 1 The schematic structural diagram of the positioning device in [device name] removing the first identification plate;

[0033] Figure 3 is Figure 1 The exploded structural diagram of the first positioning component in [device name];

[0034] Figure 4 is Figure 3 The exploded structural diagram of the first fixing block in [device name];

[0035] Figure 5 is Figure 3 The schematic structural diagram of the first registration block in [device name] from another perspective;

[0036] Figure 6 is Figure 3 The schematic structural diagram of the first identification plate in [device name] from another perspective;

[0037] Figure 7 is the schematic structural diagram of another positioning device provided by the embodiment of the present disclosure installed on the broken bone for fracture reduction;

[0038] Figure 8 is Figure 7 The schematic structural diagram of the positioning device in [device name] removing the second identification plate;

[0039] Figure 9 is Figure 7 The exploded structural diagram of the second positioning component in [device name].

[0040] The descriptions of the reference numerals in the figure are as follows:

[0041] 1 - The first positioning component;

[0042] 11 - The first fixing block;

[0043] 111 - The first fixing block body;

[0044] 1121 - The first bolt, 1122 - The first connection end, 1123 - The first end face teeth;

[0045] 1131 - The first cylinder, 1132 - The first locking nut, 1133 - The first collet;

[0046] 12 - The first registration block,

[0047] 121 - The first registration block body, 1211 - The marking ball, 1212 - The first positioning protrusion, 1214 - The character, 1215 - The first anti-misinsertion protrusion;

[0048] 1221 - The first bending part, 1222 - The second end face teeth, 1223 - The first threaded hole;

[0049] 13—First identification plate, 131—First identification plate body, 1311—First positioning through hole, 1312—Character, 1313—First anti-misinsertion groove, 132—First protrusion;

[0050] 2—Second positioning component;

[0051] 21—Second fixing block;

[0052] 211—Second fixing block body;

[0053] 2121—Second bolt, 2122—Second connection end, 2123—Third end face tooth;

[0054] 2131—Second cylinder body, 2132—Second locking nut, 2133—Second collet;

[0055] 22—Second registration block;

[0056] 221—Second registration block body, 2211—Second positioning protrusion; 2112—Character, 2113—Second anti-misinsertion protrusion;

[0057] 2221—Second bending part, 2222—Fourth end face tooth, 2223—Second threaded hole;

[0058] 231—Second identification plate body, 2311—Second positioning through hole, 2312—Character, 2313—Second anti-misinsertion groove, 232—Second protrusion;

[0059] 3—Steel needle, 4—Connecting rod, 5—Connecting piece, 6—Fractured bone. Specific embodiments

[0060] Next, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0061] As Figure 1 shown, the embodiments of the present disclosure provide a positioning device for fracture reduction, including an external fixator and two first positioning components 1. The external fixator includes a steel needle 3, a connecting rod 4 and a connecting piece 5. The steel needle 3 is fixedly arranged on the fractured bone 6, and the connecting rod 4 connects the steel needles on the fractured bone into a whole through the connecting piece 5. A first positioning component is arranged for one steel needle 3 on each fractured bone 6. For the convenience of directly removing the positioning component after the operation, generally, the connecting piece 5 of the external fixator is about 2 cm away from the skin.

[0062] As Figures 2 to 6 shown, each of the first positioning components 1 includes:

[0063] A first fixing block 11, the first fixing block 11 includes a first fixing block body 111, a first mounting portion and a first locking portion fixedly connected to the first fixing block body 111. Among them, a first through hole for a steel needle to pass through is provided on the first fixing block body 111; the first locking portion is used to relatively fix the first fixing block 11 and the steel needle passing through the first through hole;

[0064] A first registration block 12, the first registration block 12 includes a second mounting portion pivotally connected to the first mounting portion and capable of being relatively fixed to the first mounting portion, a first registration block body 121 fixedly connected to the second mounting portion, and at least two marker balls 1211 spaced apart on the first registration block body 121 and capable of developing in the scanned image of a CT scan; and,

[0065] A first identification plate 13, the first identification plate 13 is detachably fixed to the side of the first registration block body 121 away from the first fixing block 11 by bolts, and a positioning mark is provided on the side of the first identification plate 13 away from the first fixing block 11.

[0066] The positioning device for fracture reduction provided by the embodiment of the present disclosure needs to be pre-installed on the broken bone of a patient through a steel needle. Among them, the steel needle usually adopts a Steinmann pin or a Kirschner wire.

[0067] The marker balls 1211 that develop in the scanned image of a CT scan are usually metal balls. In the embodiment of the present disclosure, the marker balls 1211 can adopt aluminum alloy balls or titanium alloy balls.

[0068] By the pivotal connection between the first mounting portion and the second mounting portion, the angle of the first identification plate 13 on the first registration block 12 can be adjusted; and after the angle of the first identification plate 13 is adjusted in place, the first mounting portion and the second mounting portion are relatively fixed, so that the first identification plate 13 is fixed at a preset position.

[0069] The positioning mark is used to provide positioning data and can be an identification pattern designed according to certain rules, and the identification pattern is printed or pasted on the first identification plate.

[0070] Since the number of marker balls provided on the first positioning component is small, the volume of the first positioning component can also be reduced to a certain extent. Thus, during the reduction process, it is convenient to move each broken bone at the fracture site.

[0071] When using the positioning device provided by the embodiments of the present disclosure to reduce the fractures of each broken bone, it is only necessary to install steel pins on each broken bone in a minimally invasive manner, and set the positioning device on the steel pins, without cutting the patient's skin and tissues, avoiding the generation of large wounds, thereby reducing the harm to the patient and shortening the patient's postoperative recovery time.

[0072] The positioning device for fracture reduction provided by the embodiments of the present disclosure can be applied to both the preoperative and intraoperative stages of fracture reduction. Before the operation, a CT scan is performed on the first positioning component that is rigidly connected to the broken bone and does not have the first identification plate installed to obtain the coordinates of the marker balls in the CT coordinate system. Through CT data segmentation, the corresponding relationship between the marker balls and the broken bone is obtained; during the operation, the first identification plate is installed on the first registration block of the first positioning component, and an optical navigation system (such as an infrared tracker, a binocular camera, a magnetic navigation locator, etc.) is used to track the 6-degree-of-freedom (6DOF, Six degree of freedom) pose of the positioning markers on the first identification plate to obtain the spatial coordinates of the positioning markers on the first identification plate in the system coordinate system of the optical navigation system; using the positional relationship determined between the coordinates of the positioning markers on the first identification plate in the device coordinate system of the first positioning component and the coordinates of the marker balls in the CT coordinate system, the spatial correspondence between the broken bone and the positioning markers on the first identification plate in the first positioning component on the broken bone is determined; by using the optical navigation system to identify and track the positioning markers on the first identification plate of the first positioning component, the real-time tracking of the spatial pose of the broken bone can be achieved.

[0073] For the positioning device provided by the embodiments of the present disclosure, since the two first positioning components are respectively installed on different broken bones, the distance between the two marker balls on one first positioning component and the two marker balls on the other positioning component is relatively large; and for each first positioning component, at least two marker balls can be arranged at intervals, and the interval distance between the two marker balls can also be relatively large, making the marker balls approximate points, thereby reducing errors and accurately determining the position and specific shape of the fracture or broken bone part, improving the reduction effect of fracture reduction.

[0074] In addition, since an optical navigation system is used to track the positioning markers of the positioning device during the operation to achieve real-time tracking of the spatial pose of the broken bone, it is not necessary to use X-rays to fluoroscope the fracture site. Therefore, the radiation damage to the patient and the doctor during the reduction process can be reduced. Under the condition of reducing radiation damage, the accuracy of determining the position and posture of each broken bone at the fracture site is improved.

[0075] As Figure 4 shown, in some embodiments, the first locking portion includes a first cylinder 1131, a first locking nut 1132, and a first collet 1133;

[0076] The first cylinder 1131 is fixedly connected to the first fixing block body 111 and is coaxially arranged with the first through hole, and an external thread is provided on its outer surface; the first collet 1133 is located in the cavity of the first cylinder 1131, and the first locking nut 1132 is threadedly coupled to the outer surface of the first cylinder 1131.

[0077] By rotating the first locking nut 1132 and tightening it with the first cylinder 1131, the first collet 1133 in the cavity of the first cylinder 1131 can be compressed, and the steel needle can be clamped by the first collet 1133, so as to relatively fix the first fixing block 11 and the steel needle inserted into the first through hole, and prevent the entire first positioning assembly 1 from rotating around the steel needle.

[0078] As Figure 4 and Figure 5 shown, in some embodiments, the first mounting portion includes a first bolt 1121 and a first connection end 1122, and a second through hole is formed in the first connection end 1122;

[0079] The second mounting portion includes a first bending portion 1221 provided on one side of the first registration block body 121 and bent relative to the first registration block body 121; a first threaded hole 1223 corresponding to the second through hole is formed in the first bending portion 1221;

[0080] The end face of the first connection end 1122 is opposite to the end face of the first bending portion 1221; the first bolt 1121 passes through the second through hole and is threadedly connected to the first threaded hole 1223.

[0081] By pivotally connecting the first connection end 1122 of the first fixing block 11 to the first bending portion 1221 of the first registration block 12 with the first bolt 1121, the position adjustment of the first identification plate on the first registration block 12 can be realized before intraoperative reduction; that is, by loosening the first bolt 1121 and rotating the first registration block 12, its position relative to the first fixing block 11 is adjusted. When the first identification plate 13 fixedly connected to the first registration block 12 meets the preset position, the first bolt 1121 is tightened to fix the first identification plate 13 relative to the first fixing block 11.

[0082] As Figure 5 shown, in order to control the distance between the identification plate and the skin near the broken bone of the patient, reserve an installation space for the external fixator, and ensure the stability of the installed positioning assembly, the first bending portion 1221 can be arranged at the waist position of the first registration block body 121.

[0083] As Figures 3 to 5As shown, in some embodiments, the end face of the first connection end 1122 is provided with first end face teeth 1123, and the end face of the first bending portion 1221 is provided with second end face teeth 1222; the first end face teeth 1123 and the second end face teeth 1222 are meshed with each other.

[0084] Considering that when connecting the first fixing block 11 and the first registration block 12 through the first bolt 1121, when subjected to vibration or impact, the first registration block 12 and the first fixing block 11 move relatively, resulting in a change in the position of the first identification plate 13 on the first registration block 12. In the embodiments of the present disclosure, the first end face teeth 1123 are provided on the end face of the first connection end 1122, and the second end face teeth 1222 are provided on the end face of the first bending portion 1221; by using the meshing of the first end face teeth 1123 and the second end face teeth 1222, the relative movement between the first registration block 12 and the first fixing block 11 is prevented; and the position of the first identification plate on the first registration block 12 can also be accurately adjusted by the number of teeth of the end face teeth.

[0085] As Figure 2 、 3 and as shown in FIG. 5, in some embodiments, the first registration block body 121 is a long strip plate-like structure; the number of the marking balls 1211 is two, and they are respectively arranged at both ends of the first registration block body 121 along the length direction.

[0086] When the number of the marking balls 1211 is two, one marking ball 1211 can be arranged at one end of the first registration block body 121, and the other marking ball 1211 can be arranged at the other end, so that the distance between the two marking balls can be made as large as possible, reducing errors, and thus the position and specific shape of the fractured or broken bone part can be accurately determined, improving the reduction effect of fracture reduction.

[0087] As Figure 3 and 5 shown, in some embodiments, a circular first positioning protrusion 1212 is provided at the position where the marking ball 1211 is arranged on the first registration block body 121; the marking ball 1211 is installed in the cavity of the first positioning protrusion 1212;

[0088] A first positioning through hole 1311 matching with the first positioning protrusion 1212 is provided on the first identification plate 13.

[0089] In the embodiments of the present disclosure, through the first positioning protrusion 1212 on the first registration block body 121 and the first positioning through hole 1311 on the first identification plate 13, the first identification plate 13 can be quickly and accurately installed on the first registration block 12. And by setting the first positioning protrusion 1212 as circular, it is very convenient to install the marking ball 1211 in the cavity of the first positioning protrusion 1212.

[0090] As Figure 1 、 3 and shown in FIG. 6, in some embodiments, the first identification plate 13 is in a strip-shaped plate structure, and the first identification plate 13 includes a first identification plate body 131 and two first protrusions 132 that are symmetrically arranged on both sides of the first identification plate body 131.

[0091] By providing the first protrusions 132, the area of the first identification plate 13 can be enlarged, so that more identification patterns can be provided on the first protrusions 132 to provide more accurate positioning data. In addition, the length of the first protrusions 132 can be determined according to the length of each broken bone and the distance between the steel needles on adjacent broken bones. Therefore, there can be multiple specifications for the first identification plate 13, and the number of specific specifications is determined according to the actual situation.

[0092] As Figure 2 、 3 、FIG. 5 and FIG. 6 show that, in some embodiments, on one side of the first registration block body 121 away from the first fixing block 11 and on one side of the first identification plate body 131 close to the first fixing block 11, identification marks are provided, and the identification marks are characters 1214 and 1312.

[0093] By providing the characters 1214 and 1312 on the first registration block 12 and the first identification plate 13, the operator can quickly and accurately select the first registration block 12 and the first identification plate 13. Of course, in addition to setting characters, easily distinguishable colors can also be sprayed on the first registration block body 121 and the first identification plate 13.

[0094] As Figure 7 and 8 shown, in some embodiments, the positioning device for fracture reduction provided by the embodiments of the present disclosure further includes a second positioning assembly 2; the second positioning assembly 2 includes:

[0095] A second fixing block 21, the second fixing block 21 includes a second fixing block body 211, a third mounting portion fixedly connected to the second fixing block body 211, and a second locking portion, wherein a third through hole for a steel needle to pass through is provided on the second fixing block body 211; the second locking portion is used to relatively fix the second fixing block 21 and the steel needle passing through the third through hole;

[0096] A second registration block 22, the second registration block 22 includes a fourth mounting portion pivotally connected to the third mounting portion and capable of being relatively fixed to the third mounting portion, and a second registration block body 221 fixedly connected to the fourth mounting portion; and,

[0097] The second identification plate is detachably fixed to the side of the second registration block body 221 away from the second fixing block 21 by bolts, and a positioning mark is provided on the side of the second identification plate away from the second fixing block 21.

[0098] If more than two broken bones are generated when a fracture occurs, after installing the first positioning components in the above embodiments on the outermost two broken bones respectively, the second positioning components in this embodiment can also be installed on the intermediate broken bones. By identifying and tracking the positioning marks on the second identification plate of the second positioning components through an optical navigation system, real-time tracking of the spatial pose of the intermediate broken bones can be achieved.

[0099] The second positioning component 2 is not provided with a marker ball; for the second positioning component without a marker ball, its overall volume is small and there is a large space reserved for the doctor to operate. Therefore, during the reduction process, each broken bone at the fracture site can be conveniently moved.

[0100] As Figure 9 shown, in some embodiments, the second locking portion includes a second cylinder body 2131, a second locking nut 2132, and a second collet 2133;

[0101] The second cylinder body 2131 is fixedly connected to the second fixing block body 211 and is coaxially arranged with the third through hole, and an external thread is provided on its outer surface; the second collet 2133 is located in the cavity of the second cylinder body 2131, and the second locking nut 2132 is threadedly coupled to the outer surface of the second cylinder body 2131.

[0102] By rotating the second locking nut 2132 and tightening it with the second cylinder body 2131, the second collet 2133 in the cavity of the second cylinder body 2131 can be compressed, and the steel needle can be clamped by the second collet 2133, so as to relatively fix the second fixing block 21 and the steel needle passing through the third through hole, and avoid the entire second positioning component 2 rotating around the steel needle.

[0103] As Figure 9 shown, in some embodiments, the third mounting portion includes a second bolt 2121 and a second connection end 2122, and the second connection end 2122 is provided with a fourth through hole;

[0104] The third mounting portion includes a second bending portion 2221 provided on one side of the second registration block body 221 and bent relative to the second registration block body 221; the second bending portion 2221 is provided with a second threaded hole 2223 corresponding to the fourth through hole;

[0105] The end face of the second connection end 2122 is opposite to the end face of the second bending portion 2221; the second bolt 2121 passes through the fourth through hole and is threadedly connected to the second threaded hole 2223.

[0106] The second connecting end 2122 of the second fixing block 21 is pivotally connected to the second bending portion 2221 of the second registration block 22 by a second bolt 2121, so that the position of the second identification plate on the second registration block 22 can be adjusted before intraoperative reduction; that is, by loosening the second bolt 2121 and rotating the second registration block 22 to adjust its position relative to the second fixing block 21. When the second identification plate 23 fixedly connected to the second registration block 22 meets the preset position, the second bolt 2121 is tightened to fix the second identification plate 23 relative to the second fixing block 21.

[0107] The second registration block body 221 of the second positioning assembly 2 is not provided with a marking ball. In order to control the distance between the identification plate and the skin near the patient's broken bone, reserve an installation space for the external fixator, and ensure the stability of the installed positioning assembly, the second bending portion 2221 can be arranged at the end of the second registration block body 221.

[0108] As Figure 9 shown, in some embodiments, the end face of the second connecting end 2122 is provided with a third end face tooth 2123, and the end face of the second bending portion 2221 is provided with a fourth end face tooth 2222; the third end face tooth 2123 and the fourth end face tooth 2222 are engaged with each other.

[0109] Considering that when the second fixing block 21 and the second registration block 22 are connected by the second bolt 2121, when subjected to vibration or impact, the second registration block 22 and the second fixing block 21 move relatively, resulting in a change in the position of the second identification plate 23 on the second registration block 22. In the embodiment of the present disclosure, a third end face tooth 2123 is arranged on the end face of the second connecting end 2122, and a fourth end face tooth 2222 is arranged on the end face of the second bending portion 2221; the engagement of the third end face tooth 2123 and the fourth end face tooth 2222 is used to prevent the second registration block 22 and the second fixing block 21 from moving relatively; and the position of the second identification plate on the second registration block 22 can also be precisely adjusted by the number of teeth of the end face teeth.

[0110] As Figure 9 shown, in some embodiments, the second registration block body 221 is a long strip-shaped plate structure.

[0111] As Figure 9 shown, in some embodiments, the second registration block body 221 is provided with a columnar second positioning protrusion 2211; the second identification plate is provided with a second positioning through hole 2311 that cooperates with the second positioning protrusion 2211.

[0112] In the embodiments of the present disclosure, the second positioning protrusion 2211 on the second registration block body 221 and the second positioning through hole 2311 on the second identification plate 23 can be used to quickly and accurately install the second identification plate 23 on the second registration block 22. Since there is no marking ball provided on the second registration block body 221 of the second positioning assembly 2, without considering the distance between the marking balls, the second positioning protrusion 2211 can be arranged in the middle of the second registration block body 221.

[0113] As Figure 9 shown, in some embodiments, the second identification plate is in a strip-shaped plate structure, and the second identification plate includes a second identification plate body 231 and two second protruding parts 232 symmetrically arranged on both sides of the second identification plate body 231.

[0114] By providing the second protruding parts 232, the area of the second identification plate 23 can be enlarged, so that more identification patterns can be provided on the second protruding parts 232 to provide more accurate positioning data. In addition, the length of the second protruding parts 232 can be determined according to the length of each broken bone and the distance between the steel needles on the adjacent broken bones. Therefore, there can be multiple specifications for the second identification plate 23, and the number of specific specifications is determined according to the actual situation.

[0115] As Figure 9 shown, in some embodiments, identification marks are provided on the surface of the second registration block body 221 away from the second fixing block 21 and on the surface of the second identification plate body 231 close to the second fixing block 21, and the identification marks are characters 2112 and 2312.

[0116] By providing the characters 2112 and 2312 on the second registration block 22 and the second identification plate 23, operators can quickly and accurately select the second registration block 22 and the second identification plate 23. Of course, in addition to setting characters, distinguishable colors can also be set for the second registration block 22 and the second identification plate 23.

[0117] In addition, to prevent the identification plate of one positioning assembly from being misinstalled on the registration block of another positioning assembly, as Figure 5 and Figure 6 shown, a first anti-misinsertion protrusion 1215 is provided on the first registration block body 121 of the first positioning assembly 1, and a first anti-misinsertion groove 1313 corresponding to the first anti-misinsertion protrusion 1215 is provided on the first identification plate body 131; as Figure 9As shown in the figure, a second anti-misinsertion protrusion 2113 is provided on the second registration block body 221 of the second positioning component 2, and a second anti-misinsertion groove 2313 corresponding to the second anti-misinsertion protrusion 2113 is provided on the second identification plate body 231; wherein the position of the first anti-misinsertion protrusion 1215 on the first registration block body 121 is different from the position of the second anti-misinsertion protrusion 2113 on the second registration block body 221.

[0118] As Figure 9 shown, in some embodiments, the first registration block 12, the first identification plate 13, the second registration block 22 and the second identification plate are all made of hard plastic.

[0119] There are many types of hard plastics. In the embodiments of the present disclosure, materials such as polyformaldehyde resin (POM) and polyether ether ketone resin (PEEK) can be used. Of course, the first registration block 12, the first identification plate 13, the second registration block 22 and the second identification plate can also be made of other non-metallic materials.

[0120] In addition, in order to make the positioning component stable and firm in installation, the first fixing block 11 and the second fixing block 21 can be made of metal materials such as aluminum alloy or titanium alloy.

[0121] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the presence of additional identical elements in the process, method, article or device including the element.

[0122] Each embodiment in this specification is described in a related manner. The same or similar parts between the embodiments can be referred to each other, and the differences between each embodiment and other embodiments are emphasized.

[0123] The above are only the preferred embodiments of the present disclosure, and are not intended to limit the protection scope of the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present disclosure are included in the protection scope of the present disclosure.

Claims

1. A positioning device for fracture reduction, characterized in that, it includes an external fixator and two first positioning components (1); the external fixator includes steel pins (3), connecting rods (4) and connectors (5); the steel pins (3) are fixedly arranged on the fractured bone (6), and the connecting rods (4) connect the steel pins (3) on the fractured bone (6) into a whole through the connectors (5), and one of the steel pins (3) on each fractured bone (6) is provided with one of the first positioning components (1); each of the first positioning components (1) includes: a first fixing block (11), the first fixing block (11) includes a first fixing block body (111), a first mounting portion and a first locking portion fixedly connected to the first fixing block body (111), wherein, a first through hole for the steel pin (3) to pass through is formed on the first fixing block body (111); the first locking portion is used to relatively fix the first fixing block (11) and the steel pin (3) passing through the first through hole; a first registration block (12), the first registration block (12) includes a second mounting portion pivotally connected to the first mounting portion and capable of being relatively fixed to the first mounting portion, a first registration block body (121) fixedly connected to the second mounting portion, and at least two marker balls (1211) spaced apart on the first registration block body (121) and capable of being developed in the scanned image of CT scanning; and, a first identification plate (13), the first identification plate (13) is detachably fixed to the side of the first registration block body (121) away from the first fixing block (11), and a positioning mark is provided on the side of the first identification plate (13) away from the first fixing block (11); the first mounting portion includes a first bolt (1121) and a first connection end (1122), and a second through hole is formed in the first connection end (1122); the second mounting portion includes a first bending portion (1221) arranged on one side of the first registration block body (121) and bent relative to the first registration block body (121); a first threaded hole (1223) corresponding to the second through hole is formed in the first bending portion (1221); the end face of the first connection end (1122) is opposite to the end face of the first bending portion (1221); the first bolt (1121) passes through the second through hole and is threadedly connected to the first threaded hole (1223).

2. The positioning device according to claim 1, characterized in that, the first locking portion includes a first cylinder body (1131), a first locking nut (1132) and a first collet (1133); the first cylinder body (1131) is fixedly connected to the first fixing block body (111) and is coaxially arranged with the first through hole, and an external thread is provided on its outer surface; the first collet (1133) is located in the cavity of the first cylinder body (1131), and the first locking nut (1132) is threadedly connected to the outer surface of the first cylinder body (1131).

3. The positioning device according to claim 1, characterized in that, The end face of the first connection end (1122) is provided with first end face teeth (1123), and the end face of the first bending part (1221) is provided with second end face teeth (1222); the first end face teeth (1123) and the second end face teeth (1222) are meshed with each other.

4. The positioning device according to claim 1 or 2, characterized in that the first registration block body (121) is in a long strip plate-like structure; the number of the marking balls (1211) is two, and they are respectively arranged at both ends of the first registration block body (121) along the length direction.

5. The positioning device according to claim 4, characterized in that a circular first positioning protrusion (1212) is provided at the position where the first registration block body (121) is provided with the marking ball (1211); the marking ball (1211) is installed in the cavity of the first positioning protrusion (1212); a first positioning through hole (1311) matching with the first positioning protrusion (1212) is provided on the first identification plate (13).

6. The positioning device according to claim 4, characterized in that the first identification plate (13) is in a strip plate-like structure, and the first identification plate (13) includes a first identification plate body (131) and two first protruding parts (132) symmetrically arranged on both sides of the first identification plate body (131).

7. The positioning device according to claim 6, characterized in that identification marks are provided on the surface of the first registration block body (121) away from the first fixing block (11) and on the surface of the first identification plate body (131) close to the first fixing block (11).

8. The positioning device according to claim 1 or 2, characterized in that it further includes at least one second positioning component (2); the second positioning component (2) includes: a second fixing block (21), the second fixing block (21) includes a second fixing block body (211), a third installation part and a second locking part fixedly connected to the second fixing block body (211), wherein a third through hole for a steel needle to pass through is formed on the second fixing block body (211); the second locking part is used for relatively fixing the second fixing block (21) and the steel needle passing through the third through hole; a second registration block (22), the second registration block (22) includes a fourth installation part pivotally connected to the third installation part and a second registration block body (221) fixedly connected to the fourth installation part; and a second identification plate, the second identification plate is detachably fixed to the side of the second registration block body (221) away from the second fixing block (21), and a positioning mark is provided on the side of the second identification plate away from the second fixing block (21).

9. The positioning device according to claim 8, characterized in that the first registration block (12), the first identification plate (13), the second registration block (22) and the second identification plate are all made of hard plastic.

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