Accuracy measuring device for knee joint replacement surgery navigation system

Abstract

This utility model discloses a precision measuring device for a knee replacement surgery navigation system. The device includes a first test piece and a second test piece. The first test piece includes a first body, at least four support members disposed on the first body, multiple first groove points, and a first optical array. The first end of each support member away from the first body includes a first recess for placing a first laser reflector. The second test piece includes a second body and a second optical array disposed on the second body. The second body includes multiple second groove points and at least three second recesses for placing second laser reflectors. This application, through the first and second recesses for placing the first and second laser reflectors, enables the precision measuring device to be simultaneously located by both the knee replacement surgery navigation system and the laser tracker, thereby allowing the precision measuring device to measure the accuracy of the knee replacement surgery navigation system.

Description

Technical Field

[0001] This utility model relates to the field of surgical technology, specifically to a precision measurement device for a knee replacement surgery navigation system. Background Technology

[0002] In the field of surgical technology, especially in knee replacement surgery, a knee replacement surgery navigation system is generally required to improve surgical precision. This system provides optical positioning, preoperative planning, and real-time intraoperative guidance. During knee replacement surgery, the surgeon adjusts and fixes the guide plate device according to the prompts from the navigation system before performing bone cutting.

[0003] Knee replacement surgery navigation systems fall into two main categories: automated navigation systems with integrated robotic arms and pure navigation systems without robotic arms. Pure navigation systems, with their advantages of reducing costs while preserving physician control and surgical flexibility, are of significant application value in small and medium-sized hospitals and clinical settings that emphasize physician autonomy.

[0004] However, there is currently no dedicated system accuracy measurement device for the type of knee replacement surgery navigation system without a robotic arm, making it difficult for users to make a horizontal comparison of the system accuracy of knee replacement surgery navigation systems from different manufacturers. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this application provides a precision measurement device for a knee replacement surgery navigation system. The device comprises a first test piece including a first main body, at least four support members disposed on the first main body, multiple first grooves for placing optical probes, and a first optical array. The first end of each support member away from the first main body includes a first recess for placing a first laser reflector. A second test piece includes a second main body and a second optical array disposed on the second main body. The second main body includes multiple second grooves for placing optical probes and at least three second recesses for placing second laser reflectors. This allows the precision measurement device to be simultaneously located by both the knee replacement surgery navigation system and a laser tracker. Since the laser tracker has higher precision than the knee replacement surgery navigation system, the precision measurement device can be used to measure the precision of the knee replacement surgery navigation system.

[0006] To solve the above problems, this utility model provides the following technical solution:

[0007] In a first aspect, embodiments of this application provide a precision measuring device for a knee replacement surgery navigation system, the precision measuring device for the knee replacement surgery navigation system comprising a first test piece and a second test piece;

[0008] The first test piece includes a first body, at least four support members disposed on the first body, a plurality of first grooves for placing optical probes, and a first optical array. The first end of the support member away from the first body includes a first recess for placing a first laser reflector. The first ends of at least three of the support members are at different distances from the surface of the first body.

[0009] The second test piece includes a second body and a second optical array disposed on the second body. The second body includes a plurality of second grooves for placing optical probes and at least three second recesses for placing second laser reflectors.

[0010] In some embodiments, the support member is a column.

[0011] In some embodiments, the plurality of said supports are parallel to each other.

[0012] In some embodiments, the support member is disposed on a first surface of the first body, and the support member is perpendicular to the first surface.

[0013] In some embodiments, the first optical array is disposed on a second surface of the first body, the second surface being different from the first surface.

[0014] In some embodiments, the second end of the support member connected to the first body includes a first connecting portion, and the support member is detachably connected to the first body through the first connecting portion.

[0015] In some embodiments, the second body also includes a guide groove into which an osteotome can be inserted;

[0016] When multiple second laser reflectors are placed one by one in the second recess, the multiple second recesses can make the center of all the second laser reflectors on a preset plane, and the preset plane is parallel to the motion plane formed after the osteotomy knife is inserted into the guide groove.

[0017] In some embodiments, the second body includes a second connecting portion, and the second body is detachably connected to the second optical array via the second connecting portion.

[0018] In some embodiments, the second body further includes a third connecting portion, through which the second body can be connected to a mobile device.

[0019] In some embodiments, the first recess is a spherical groove, and the second recess is a spherical groove.

[0020] This application provides a precision measurement device for a knee replacement surgery navigation system. The device comprises a first test piece including a first main body, at least four support members disposed on the first main body, multiple first grooves for placing optical probes, and a first optical array. The first end of each support member away from the first main body includes a first recess for placing a first laser reflector. A second test piece includes a second main body and a second optical array disposed on the second main body. The second main body includes multiple second grooves for placing optical probes and at least three second recesses for placing second laser reflectors. This allows the precision measurement device to be simultaneously located by both the knee replacement surgery navigation system and a laser tracker. Since the laser tracker has higher precision than the knee replacement surgery navigation system, the precision measurement device can be used to measure the precision of the knee replacement surgery navigation system. Attached Figure Description

[0021] Figure 1 This is a front view of the first test piece and the second test piece when the first laser emitting element is placed in the precision measuring device provided in the embodiment of this application.

[0022] Figure 2 This is a three-dimensional schematic diagram of the first test piece provided in the embodiments of this application when the first laser emitting element is placed on it.

[0023] Figure 3 This is a front view schematic diagram of the first test piece provided in the embodiments of this application.

[0024] Figure 4 This is a three-dimensional schematic diagram of the second test piece of the precision measuring device provided in the embodiments of this application.

[0025] Figure 5 This is a three-dimensional schematic diagram of the second body of the second test piece provided in the embodiments of this application.

[0026] Figure 6 This is a top view of the second body of the second test piece provided in the embodiments of this application.

[0027] Figure 7 This is a front view schematic diagram of the second body of the second test piece provided in the embodiments of this application.

[0028] Figure 8 This is a three-dimensional schematic diagram of the second test piece connected to the mobile device according to an embodiment of this application.

[0029] Figure 9 This is a schematic flowchart of a knee replacement surgery navigation method using a precision measurement device provided in an embodiment of this application.

[0030] Figure 10 This is a schematic diagram of the first plane provided in the embodiments of this application.

[0031] Figure 11 This is a schematic diagram of the second plane provided in the embodiments of this application. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0034] This application provides a precision measurement device for a knee replacement surgery navigation system. A first test piece includes a first main body, at least four support members disposed on the first main body, multiple first grooves for placing optical probes, and a first optical array. The first end of each support member away from the first main body includes a first recess for placing a laser reflector. A second test piece includes a second main body and a second optical array disposed on the second main body. The second main body includes multiple second grooves for placing optical probes and at least three second recesses for placing laser reflectors. This allows the precision measurement device to be simultaneously located by both the knee replacement surgery navigation system and a laser tracker. Since the laser tracker has higher precision than the knee replacement surgery navigation system, the precision measurement device can be used to measure the precision of the knee replacement surgery navigation system.

[0035] The accuracy measurement device of the knee replacement surgery navigation system provided in this application will be described in detail below with reference to the accompanying drawings.

[0036] Please see Figure 1 , Figure 1 This is a three-dimensional schematic diagram of the first and second test pieces of the precision measuring device provided in this application embodiment, with the first laser emitting element placed on them. Figure 1 As shown, in some embodiments, the accuracy measuring device 1 of the knee replacement surgery navigation system includes a first test piece 10 and a second test piece 20.

[0037] Please see Figure 2 , Figure 2 This is a three-dimensional schematic diagram of the first test piece provided in the embodiments of this application, in which the first laser emitting element is placed. Figure 2 As shown, in some embodiments, the first test piece 10 includes a first body 11, at least four supports 12 disposed on the first body 11, a plurality of first grooves 111 for placing optical probes, and a first optical array 13.

[0038] Optionally, the number of support members 12 can be 4, 5, 6, 8, or 10, etc. For example... Figure 2 As shown, the number of support members 12 can be 6. At least four support members 12 include support member A, support member B, support member C, support member D, support member E, and support member F.

[0039] Optionally, the number of the first groove points 111 can be 4, 5, 6, 8, or 10, etc. For example... Figure 2 As shown, the number of the first groove points 111 can be 6.

[0040] Please see Figure 3 , Figure 3 This is a front view schematic diagram of the first test piece provided in an embodiment of this application. For example... Figure 3 As shown, in some embodiments, the first end of the support member 12 away from the first body 11 includes a placeable... Figure 2 The first recess 121 of the first laser reflector O1. The first ends of at least three supports 12 are at different distances from the surface of the first body 11.

[0041] like Figure 3 As shown, optionally, the distances between the first ends of the plurality of support members 12 and the surface of the first body 11 are different. In this way, in the accuracy measurement method using the accuracy measuring device 1, the first plane P1 determined by the first coordinates of the first laser reflector O1 group placed on the first recess 121 of every three support members 12 is different, which facilitates multiple accuracy measurements and reduces errors.

[0042] like Figures 1 to 3 As shown, optionally, the first body 11 is a cuboid.

[0043] For example, the length L of the first body 11 is 250 mm, the width W is 150 mm, and the height H is 80 mm.

[0044] In some embodiments, the support member 12 is a column.

[0045] Optionally, a prism can be divided into a straight prism and an oblique prism. A prism can include prisms and cylinders, etc.

[0046] Optionally, the support member 12 can be a straight column.

[0047] Optionally, the support member 12 can be a combination of a column and a platform, or it can be other shapes, which are not limited here.

[0048] Preferably, the support member 12 can be a straight cylinder. This facilitates the processing of the support member 12.

[0049] In some embodiments, the multiple support members 12 are parallel to each other.

[0050] Optionally, the first laser reflector O1 can be a sphere, such as a laser target sphere. The first laser reflector O1 can also be other objects that can reflect laser light, and the shape of the laser reflector is not limited here.

[0051] Optionally, the first recess 121 is a spherical groove. When the first laser reflector O1 is a laser target sphere, the spherical groove can restrict the movement of the first laser reflector O1, so that the first laser reflector O1 can be stably placed in the first recess 121.

[0052] In some embodiments, when the material of the first laser reflector O1 is a magnetic metal, the first end of the support 12 may be magnetic. A magnetic metal is a metal that can be attracted by a magnet. In this way, the laser reflector can be stably placed at the first end of the support 12.

[0053] In some embodiments, the second end of the support member 12 connected to the first body 11 includes a first connecting portion, and the support member 12 is detachably connected to the first body 11 through the first connecting portion.

[0054] Optionally, the support member 12 can be detachably connected to the first body 11 by means of snap-fit, thread, and magnetic attraction, etc., which are not limited here.

[0055] For example, when the support member 12 is threadedly connected to the first body 11, the first connecting part may include an external thread, and the first body 11 may include an internal threaded hole that matches the first connecting part.

[0056] like Figure 2 and Figure 3 As shown, in some embodiments, the support member 12 is disposed on the first surface M1 of the first body 11, and the support member 12 is perpendicular to the first surface M1.

[0057] like Figure 2 As shown, in some embodiments, the first optical array 13 is disposed on the second surface M2 of the first body 11, and the second surface M2 is different from the first surface M1. In this way, when a laser tracker emits a laser towards the laser reflector, the laser can be prevented from hitting the first optical array 13, thereby avoiding measurement errors.

[0058] Optionally, the second surface M2 and the first surface M1 are adjacent surfaces.

[0059] Optionally, the first optical array 13 is detachably connected to the first body 11.

[0060] Optionally, the first optical array 13 includes multiple reflectors. In a knee replacement surgery navigation system, when the optical camera is controlled to take a picture of the first test piece 10, the multiple reflectors of the first optical array 13 reflect light, so that the first image includes a feature area representing the first optical array 13.

[0061] Please see Figure 4 , Figure 4 This is a three-dimensional schematic diagram of the second test piece of the precision measuring device provided in the embodiments of this application. (See diagram below.) Figure 4 As shown, in some embodiments, the second test piece 20 includes a second body 21 and a second optical array 22 disposed on the second body 21.

[0062] Optionally, the second optical array 22 includes multiple reflectors. In a knee replacement surgery navigation system, when the optical camera is controlled to take a picture of the second test piece 20, the multiple reflectors of the second optical array 22 reflect light, so that the second image includes feature areas representing the second optical array 22.

[0063] Please see Figures 4 to 7 , Figure 5 This is a three-dimensional schematic diagram of the second body of the second test piece provided in the embodiments of this application. Figure 6 This is a top view of the second body of the second test piece provided in the embodiments of this application. Figure 7 This is a front view schematic diagram of the second main body of the second test piece provided in the embodiments of this application. For example... Figures 4 to 7 As shown, in some embodiments, the second body 21 includes a plurality of second grooves 211 for placing optical probes and at least three second recesses 212 for placing second laser reflectors O2.

[0064] Optionally, the second groove point 211 can be 3, 4 or 5, etc.

[0065] Optionally, the second recess 212 can be 3, 4 or 5, etc.

[0066] In some embodiments, the second recess 212 is a spherical groove. When the laser reflector is a laser target sphere, the spherical groove can restrict the movement of the second laser reflector O2, so that the second laser reflector O2 can be stably placed in the second recess 212.

[0067] Optionally, when multiple second laser reflectors O2 are placed one by one in the second recess 212, the multiple second recesses 212 can make the center of all the second laser reflectors O2 on a preset plane, and the preset plane is parallel to the surface of the second body 21 near the second laser reflector O2.

[0068] In some embodiments, the second body 21 further includes a guide groove into which an osteotomy blade can be inserted. When multiple second laser reflectors O2 are placed one by one in the second recess 212, the multiple second recesses 212 ensure that the centers of all the second laser reflectors O2 are on a preset plane, and the preset plane is parallel to the motion plane formed by the osteotomy blade after it is inserted into the guide groove. The motion plane can also be referred to as the osteotomy plane. In this case, the second test piece 20 can be an osteotomy guide plate used in knee replacement surgery. In this way, when multiple second laser reflectors O2 are placed one by one in the second recess 212, the location of the osteotomy plane can be determined by determining the center of the second laser reflectors O2, thereby facilitating subsequent accuracy measurement of the knee replacement surgery navigation system. At the same time, the second test piece 20 is also an osteotomy guide plate, which can be directly applied in knee replacement surgery.

[0069] like Figures 4 to 7 As shown, in some embodiments, the second body 21 includes a second connecting portion 213, and the second body 21 is detachably connected to the second optical array 22 through the second connecting portion 213.

[0070] For example, the second connection portion 213 includes a connecting post, and the second optical array 22 includes a connecting groove that matches the connecting post.

[0071] For example, the second connection portion 213 may include external threads, and the second optical array 22 may include an internal threaded hole that matches the first connection portion.

[0072] like Figure 4 , Figure 5 and Figure 7 As shown, the second main body 21 also includes a third connecting part 214. Please refer to [further details]. Figure 8 , Figure 8 This is a perspective view of the second test piece connected to the moving device according to an embodiment of this application. Figure 8 As shown, in some embodiments, the second body 21 can be connected to the moving device 23 via the third connecting part 214. The moving device 23 can move the second test piece 20 so that the second test piece 20 is in the target pose.

[0073] Optionally, the moving device 23 can be a robotic arm. The moving device 23 can be manually controlled or controlled by a motor; this application does not limit the movement method of the moving device 23. Therefore, the precision measuring device 1 of this application can be applied to automated navigation systems with integrated robotic arms and pure navigation systems without robotic arms.

[0074] For example, the third connection portion 214 may include a socket, and the moving device 23 may include a plug that matches the socket.

[0075] For example, the third connection portion 214 may include an internal threaded hole, and the moving device 23 may include an external thread that matches the internal threaded hole.

[0076] In the precision measurement method using the precision measuring device 1 as described above, the first test piece 10 can be used to represent the patient's bone, and the second test piece 20 can be used to represent the osteotomy guide plate used during the osteotomy process.

[0077] The following describes in detail how to use the precision measuring device 1.

[0078] Please see Figure 9 , Figure 9 This is a schematic flowchart of a knee replacement surgery navigation method using a precision measurement device provided in an embodiment of this application. Figure 9 As shown, in some embodiments, the accuracy measurement method using the accuracy measuring device 1 as described above includes steps S101 to S110.

[0079] Step S101: In the knee replacement surgery navigation system, when at least three first recesses of the first test piece of the precision measuring device are equipped with first laser reflectors, the first test piece is photographed to obtain a first image.

[0080] Step S102: Identify the feature regions of the first optical array in the first image, and determine the first coordinates of each first laser reflector in the spatial coordinate system based on the feature regions of the first optical array.

[0081] In the knee replacement surgery navigation system, the transformation relationship between the coordinate system of the first optical array 13 and the coordinate system of the first test piece 10 is pre-stored. After identifying the feature region of the first optical array 13 in the first image, the coordinates of the first optical array 13 in the spatial coordinate system can be calculated based on the feature region of the first optical array 13 in the first image and the image coordinate system. Then, based on the coordinates of the first optical array 13 in the spatial coordinate system and the transformation relationship between the coordinate system of the first optical array 13 and the coordinate system of the first test piece 10, the coordinates of each support member 12 on the first test piece 10 in the spatial coordinate system can be calculated. Based on the coordinates of each support member 12 in the spatial coordinate system, the first coordinate of each first laser reflector O1 placed on the support member 12 in the spatial coordinate system can be calculated.

[0082] Optionally, it can be determined which support members 12 are equipped with the first laser reflector O1 based on the first image or user instructions.

[0083] Step S103: Select three first coordinates to determine the first plane.

[0084] In some implementations, the first plane P1 can be determined by selecting three first coordinates according to preset rules and user instructions.

[0085] Please see Figure 10 , Figure 10 This is a schematic diagram of the first plane provided in an embodiment of this application. For example... Figure 10 As shown, by way of example, the first coordinates of the first laser reflector O1 placed on the support A and support B of the first test piece 10 can be selected, and the first coordinates of the first laser reflector O1 placed on the support F can be selected to obtain three selected first coordinates, thereby determining the first plane P1.

[0086] In some implementations, when the first plane P1 is determined multiple times to determine the first standard plane and the second standard plane multiple times, the first plane P1 determined in each of the multiple determinations is not coplanar. In this way, compared to the method in which the first plane P1 is coplanar in multiple measurements, measurement errors can be reduced.

[0087] In some embodiments, when at least four supports 12 are disposed on the first body 11, the distances between the first ends of at least three supports 12 and the surface of the first body 11 are different. Further, the distances between the first ends of multiple supports 12 and the surface of the first body 11 are different. In this way, in the accuracy measurement method, the first plane P1 determined based on the first coordinate combination of the first laser reflector O1 placed on each of the three supports 12 is different, facilitating multiple accuracy measurements.

[0088] In some embodiments, when the first plane P1 is determined multiple times to determine the first standard plane and the second standard plane multiple times, the first coordinate of the first laser reflector O1 placed on the first recess 121 of the support 12 of each first test piece 10 is selected at least once.

[0089] For example, when determining the first plane P1 for the first time, the first coordinates of the first laser reflectors O1 placed on supports A and B can be selected, and the first coordinates of the first laser reflectors O1 placed on support F can also be selected, resulting in three selected first coordinates, thereby determining the first plane P1. When determining the first plane P1 for the second time, the first coordinates of the first laser reflectors O1 placed on supports C and D can also be selected, and the first coordinates of the first laser reflectors O1 placed on support E can also be selected, resulting in three selected first coordinates, thereby determining the first plane P1. In this way, the first coordinates of the first laser reflectors O1 placed on each support 12 are selected at least once. Furthermore, the first plane P1 determined in multiple instances is not coplanar. This method further reduces measurement errors.

[0090] Optionally, the first test piece 10 may have only 3 first laser reflectors O1 placed on it at a time, or it may always have more than 3 first laser reflectors O1 placed on it. For example, during the measurement process, 6 first laser reflectors O1 may always be placed on the first test piece 10.

[0091] Step S104: When the second laser reflector is placed in the three second recesses of the second test piece of the precision measuring device, the second test piece is photographed to obtain a second image.

[0092] Optionally, it can be determined which second recesses 212 are fitted with the second laser reflector O2 based on the second image or user instructions.

[0093] Step S105: Identify the feature regions of the second optical array in the second image, and determine the second coordinates of each second laser reflector in the spatial coordinate system based on the feature regions of the second optical array.

[0094] In the knee replacement surgery navigation system, the transformation relationship between the coordinate system of the second optical array 22 and the coordinate system of the second test piece 20 is pre-stored. After identifying the feature region of the second optical array 22 in the second image, the coordinates of the second optical array 22 in the spatial coordinate system can be calculated based on the feature region of the second optical array 22 in the second image and the image coordinate system. Then, based on the coordinates of the second optical array 22 in the spatial coordinate system and the transformation relationship between the coordinate system of the second optical array 22 and the coordinate system of the second test piece 20, the coordinates of each second recess 212 on the second test piece 20 in the spatial coordinate system can be calculated. Based on the coordinates of each second recess 212 in the spatial coordinate system, the second coordinates of each second laser reflector O2 placed on the second recess 212 in the spatial coordinate system can be calculated.

[0095] Step S106: Determine the second plane based on the three second coordinates.

[0096] Please see Figure 11 , Figure 11 This is a schematic diagram of the second plane provided in an embodiment of this application. For example... Figure 11 As shown, a second laser reflector O2 is placed on each of the three second recesses 212. The second plane P2 can be determined based on the second coordinates of the three second laser reflectors O2.

[0097] Steps S101 to S106 are all executed by the knee replacement surgery navigation system controlled by electronic devices.

[0098] In some embodiments, after step S103, when the second laser reflector O2 is placed on the three second recesses 212 of the second test piece 20 of the precision measuring device 1, the second test piece 20 is moved by a manual or motor-controlled moving device 23. The motor can also be controlled by an electronic device. The knee replacement surgery navigation system is controlled by the electronic device to execute steps S104 to S106 once at a preset time interval to continuously determine the second plane P2 multiple times, and to control the knee replacement surgery navigation system to calculate the error between the first plane P1 and the second plane P2 to determine whether the first plane P1 and the second plane P2 are coplanar.

[0099] When controlling the knee replacement surgery navigation system to execute steps S101 to S106, the knee replacement surgery navigation system determines the first plane P1 and the second plane P2 based on the first image and the second image, which are optical images, respectively.

[0100] Step S107: When the first plane and the second plane are determined to be coplanar in the knee replacement surgery navigation system, the laser tracker is controlled to emit lasers to each of the first laser reflectors used to determine the first plane, so as to obtain the first standard coordinates of the three first laser reflectors in the spatial coordinate system.

[0101] Laser trackers use lasers for measurement, while knee replacement surgery navigation systems use optical images for measurement. Therefore, laser trackers have higher measurement accuracy than knee replacement surgery navigation systems, and laser trackers can be used to measure the accuracy of knee replacement surgery navigation systems.

[0102] Step S108: Control the laser tracker to emit lasers to each second laser reflector to obtain the second standard coordinates of the three second laser reflectors in the spatial coordinate system.

[0103] Step S109: Determine the first standard plane based on three first standard coordinates, and determine the second standard plane based on three second standard coordinates.

[0104] Step S110: Determine the accuracy of the knee replacement surgery navigation system based on the error between the first standard plane and the second standard plane.

[0105] In some implementations, step S110 includes steps S111 to S113.

[0106] Step S111: Calculate the distance between each first standard coordinate and the second standard plane.

[0107] In some implementations, the normal vector of the second standard plane is calculated first, and then the distance between each first standard coordinate and the second standard plane is calculated based on each first standard coordinate and the normal vector of the second standard plane.

[0108] Step S112: Calculate the angle between the first standard plane and the second standard plane.

[0109] In some implementations, the normal vector of the first standard plane is calculated first, and then the angle between the first standard plane and the second standard plane is calculated based on the expression of the normal vector of the first standard plane and the second standard plane.

[0110] Step S113: Determine the accuracy of the knee replacement surgery navigation system based on distance and angle.

[0111] In some implementations, the accuracy indicators of the knee replacement surgery navigation system include distance and angle. The distance between each first standard coordinate and the second standard plane, and the angle between the first standard plane and the second standard plane, can be displayed for user reference.

[0112] In some implementations, distances and angles can be calculated using a preset method to obtain an indicator of the accuracy of the knee replacement surgery navigation system.

[0113] In some implementations, the accuracy of the knee replacement surgery navigation system is determined based on multiple errors between a first and a second standard plane determined multiple times. In this case, steps S101 to S110 as described above are performed multiple times.

[0114] In some embodiments, when the optical probe is placed at the first recess point 111, the first test piece 10 can be calibrated in the knee replacement surgery navigation system. When the optical probe is placed at the second recess point 211, the second test piece 20 can be calibrated in the knee replacement surgery navigation system. In this way, instrument calibration can be completed in the knee replacement surgery navigation system, ensuring that the first test piece 10 and the second test piece 20 are positioned in the same coordinate system, and simultaneously determining the relative positions of the first test piece 10 and the second test piece 20, thereby achieving the navigation function.

[0115] In summary, the accuracy measurement device 1 for the knee replacement surgery navigation system provided in this application embodiment has the following advantages:

[0116] 1. The first test piece 10 includes a first body 11, at least four support members 12 disposed on the first body 11, a plurality of first groove points 111 for placing optical probes, and a first optical array 13. The first end of the support member 12 away from the first body 11 includes a first recess 121 for placing a first laser reflector O1. The second test piece 20 includes a second body 21 and a second optical array 22 disposed on the second body 21. The second body 21 includes a plurality of second groove points 211 for placing optical probes and at least three second recesses 212 for placing second laser reflectors O2. This allows the accuracy measuring device 1 to be simultaneously located by the knee replacement surgery navigation system and the laser tracker. The accuracy of the laser tracker is higher than that of the knee replacement surgery navigation system. Therefore, the accuracy of the knee replacement surgery navigation system can be measured using the accuracy measuring device 1.

[0117] 2. The second body 21 also includes a third connecting part 214. The second body 21 can be connected to the moving device 23 through the third connecting part 214, so that the precision measuring device 1 of this application can be applied to automated navigation systems with integrated robotic arms and pure navigation systems without robotic arms.

[0118] In summary, this application provides a precision measuring device 1 for a knee replacement surgery navigation system. The precision measuring device 1 for the knee replacement surgery navigation system includes: a first test piece 10 and a second test piece 20; the first test piece 10 includes a first body 11, at least four support members 12 disposed on the first body 11, a plurality of first groove points 111 for placing optical probes, and a first optical array 13, the first end of the support member 12 away from the first body 11 includes a first recess 121 for placing a first laser reflector O1, and the distances between the first ends of at least three support members 12 and the surface of the first body 11 are different; the second test piece 20 includes a second body 21 and a second optical array 22 disposed on the second body 21, the second body 21 includes a plurality of second groove points 211 for placing optical probes and at least three second recesses 212 for placing second laser reflectors O2. This application uses a first test piece 10 comprising a first body 11, at least four support members 12 disposed on the first body 11, a plurality of first groove points 111 for placing optical probes, and a first optical array 13. The first end of the support member 12 away from the first body 11 includes a first recess 121 for placing a laser reflector. The second test piece 20 comprises a second body 21 and a second optical array 22 disposed on the second body 21. The second body 21 includes a guide groove for inserting an osteotomy blade, a plurality of second groove points 211 for placing optical probes, and at least three second recesses 212 for placing laser reflectors. This allows the precision measuring device 1 to be simultaneously located by the knee replacement surgery navigation system and the laser tracker. The laser tracker has higher precision than the knee replacement surgery navigation system, thus the precision measuring device 1 can be used to measure the precision of the knee replacement surgery navigation system.

[0119] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A precision measuring device for a knee replacement surgery navigation system, characterized in that, The accuracy measurement device of the knee replacement surgery navigation system includes a first test piece and a second test piece. The first test piece includes a first body, at least four support members disposed on the first body, a plurality of first grooves for placing optical probes, and a first optical array. The first end of the support member away from the first body includes a first recess for placing a first laser reflector. The first ends of at least three of the support members are at different distances from the surface of the first body. The second test piece includes a second body and a second optical array disposed on the second body. The second body includes a plurality of second grooves for placing optical probes and at least three second recesses for placing second laser reflectors.

2. The accuracy measuring device for the knee replacement surgery navigation system according to claim 1, characterized in that, The support member is a column.

3. The accuracy measuring device for the knee replacement surgery navigation system according to claim 2, characterized in that, The multiple support members are parallel to each other.

4. The accuracy measuring device for the knee replacement surgery navigation system according to claim 2 or 3, characterized in that, The support member is disposed on the first surface of the first body, and the support member is perpendicular to the first surface.

5. The accuracy measuring device for the knee replacement surgery navigation system according to claim 4, characterized in that, The first optical array is disposed on the second surface of the first body, and the second surface is different from the first surface.

6. The accuracy measuring device for the knee replacement surgery navigation system according to claim 1, characterized in that, The second end of the support member connected to the first body includes a first connecting portion, and the support member is detachably connected to the first body through the first connecting portion.

7. The accuracy measuring device for the knee replacement surgery navigation system according to claim 1, characterized in that, The second body also includes a guide groove into which an osteotome can be inserted; When multiple second laser reflectors are placed one by one in the second recess, the multiple second recesses can make the center of all the second laser reflectors on a preset plane, and the preset plane is parallel to the motion plane formed after the osteotomy knife is inserted into the guide groove.

8. The accuracy measuring device for the knee replacement surgery navigation system according to claim 1, characterized in that, The second body includes a second connecting part, and the second body is detachably connected to the second optical array through the second connecting part.

9. The accuracy measuring device for the knee replacement surgery navigation system according to claim 1, characterized in that, The second body also includes a third connecting part, through which the second body can be connected to the mobile device.

10. The accuracy measuring device for the knee replacement surgery navigation system according to claim 1, characterized in that, The first recess is a spherical groove, and the second recess is a spherical groove.

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