A femoral neck surgical guide

Abstract

The application discloses a femoral neck surgery guider, which comprises a base with an anteversion angle matched with a femoral neck, and a mounting through hole is formed in the base, and an axis of the mounting through hole is perpendicular to a plane on the base at one side of the anteversion angle and extends to a plane on the base at the other side of the anteversion angle; the guider part comprises a guider column for being placed in the mounting through hole and being rotatable, a through central hole, a parallel hole and a correction hole are formed in the guider column, wherein the guider column comprises opposite first and second ends, the central hole is coaxially arranged with the guider column, the parallel hole and the correction hole are arranged at equal intervals with the central hole on an end face of the first end, the parallel hole is arranged in parallel with the central hole, the correction hole is arranged at an angle with the central hole and intersects on an end face of the second end; the positioning part is used for limiting the guider part on the base at a specified rotation angle. The guider provided by the application can adjust the insertion position and the insertion angle of a guide needle into the guider, and more accurately places the guide needle into the femoral neck.

Description

Technical Field

[0001] This invention relates to the field of fracture fixation auxiliary devices, and in particular to a femoral neck surgical guide. Background Technology

[0002] Existing methods for treating femoral neck fractures, especially in young people, typically involve the placement of canned screws. These canned screws must be inserted into the horn layer of the femur. Currently, the common method is to insert three screws in parallel, ensuring the insertion point forms a triangle. During the procedure, a specified number of guide pins are first inserted parallel to the designated location on the femur. The canned screw is then fitted onto the guide pins for insertion. Related techniques often utilize a guide device to guide the insertion of the guide pins.

[0003] There are two main types of existing guides. One type uses a thicker base with guide holes. The other type uses a plate whose shape is adapted to the shape of the proximal femur, and three conduits are integrated with the plate. Guide holes are set in the conduits. When in use, the plate is placed against the femur.

[0004] The first type of guide is large in size and lacks a device to determine the anteversion angle; the second type has a fixed and simple guide hole with low accuracy. In addition, regardless of the type of guide, the position and angle of the guide hole are fixed, and they are all positioned by fitting the base (plate) with the shape of the femur. They cannot be adjusted according to the characteristics of the patient's femur, and cannot place the screw in a more accurate position. Summary of the Invention

[0005] The purpose of this invention is to overcome the deficiencies described in the prior art, thereby providing a femoral neck surgical guide. This guide allows for adjustment of the guide pin's insertion position and angle during use, thus more accurately placing the guide pin into the femoral neck. The specific technical solution is as follows:

[0006] This invention provides a femoral neck surgical guide, comprising:

[0007] The base has an anteversion angle adapted to the femoral neck. The base has a mounting through hole, the axis of which is perpendicular to a plane on the base located on one side of the anteversion angle and extends to a plane on the base located on the other side of the anteversion angle.

[0008] The guide portion includes a guide post for insertion into the mounting through hole and rotatable. The guide post has a through center hole, a parallel hole, and a correction hole. The guide post includes a first end and a second end opposite to each other. The center hole is coaxially arranged with the guide post. The parallel hole and the correction hole are arranged at equal intervals with the center hole on the end face of the first end. The parallel hole is parallel to the center hole. The correction hole is at an angle to the center hole and intersects the end face of the second end.

[0009] A positioning part is used to limit the guide part to be positioned on the base at a specified rotation angle.

[0010] As one possible implementation, the second end of the guide post extends axially and contracts radially.

[0011] As one possible implementation, the correction hole includes a first correction hole and a second correction hole, wherein the first correction hole and the second correction hole are disposed opposite to each other on both sides of the central hole on the end face of the first end;

[0012] Preferably, the parallel holes include a first parallel hole and a second parallel hole respectively disposed between the first correction hole and the second correction hole, and the first parallel hole, the second parallel hole, the first correction hole and the second correction hole are equally spaced on the end face of the first end with the central hole as the center.

[0013] As one feasible approach, the angle between the correction hole and the center hole is set to α, where the value of α is greater than 0 degrees and less than or equal to 5 degrees.

[0014] Preferably, the value of α is 5 degrees.

[0015] As one possible implementation, the guide post is provided with a first limiting groove in the circumferential direction, and the bottom wall of the first limiting groove is provided with limiting protrusions arranged at equal intervals.

[0016] The positioning part is disposed on the base. When the guide part is inserted into the mounting through hole, the positioning part corresponds to the first limiting groove.

[0017] As one possible implementation, the positioning unit includes:

[0018] A button includes a pressing end and a free end, with a groove between the pressing end and the free end. The groove passes through a cylindrical pin fixed in the base. The groove includes a first groove section and a second groove section. The first groove section is close to the pressing end, and the groove width of the first groove section is adapted to the cylindrical pin. The groove width of the second groove section is greater than that of the cylindrical pin. A clearance groove is provided on the side of the button, corresponding to the second groove section. A locking tongue is provided between the clearance groove and the pressing end.

[0019] The elastic part, arranged radially along the mounting through hole, includes an elastic element fixed at one end in the base body. The free end of the elastic element is connected to a ball head pin. The ball head pin has a second limiting groove adapted to the locking tongue in the circumferential direction. The free end of the ball head pin extends into the mounting through hole. When the guide part is placed in the mounting through hole and the button is in the natural state, the cylindrical pin is located in the second sliding groove section. The clearance groove corresponds to the first limiting groove. The ball head pin contacts the bottom wall of the first limiting groove and can move up and down on the bottom wall of the first limiting groove as the guide part rotates.

[0020] When the guide part is rotated to a specified angle, the button is pressed, the cylindrical pin is located in the first sliding groove section, the locking tongue is embedded in the second limiting groove on the ball head pin, the ball head pin is positioned between two adjacent limiting protrusions in the first limiting groove, and the guide part is fixed in the base.

[0021] As one possible implementation, the substrate includes a guide plate and a support plate arranged at an angle, the angle between the guide plate and the support plate forming the anteversion angle, the support plate conforming to the shape of the femur, and the mounting through hole being arranged perpendicular to the guide plate.

[0022] As one possible implementation, the forward tilt angle is 130 degrees.

[0023] As one possible implementation, the free end of the guide plate is also provided with an operating handle.

[0024] In one feasible embodiment, the operating handle includes a handle, a fixed connecting rod, and a threaded connecting rod. The two ends of the fixed connecting rod are respectively inserted into the free ends of the handle and the guide plate. The threaded connecting rod is arranged parallel to the fixed connecting rod, and the two ends of the threaded connecting rod are respectively threadedly connected to the free ends of the handle and the guide plate.

[0025] As one possible implementation, the handle is also provided with a limiting pin, which passes through the fixing link and is inserted into the handle.

[0026] As one possible approach, the support plate is also provided with positioning pins distributed around the mounting through holes to fix the base plate to the femur.

[0027] The beneficial effects of the technical solution provided by this invention are:

[0028] The femoral neck surgical guide provided by the present invention mainly consists of a base, a guide part and a positioning part. The base is provided with a forward tilt angle, which allows the base to fit better against the bone surface and facilitates the application of external force.

[0029] During use, this application allows for adjustments based on the femoral characteristics of different patients. Specifically, by rotating the guide post, the corresponding positions of the parallel holes and correction holes on the femur can be changed, thereby adjusting the insertion position of the positioning pin and placing the hollow screw in the appropriate position. The guide post can rotate relative to the base, providing multiple rotational positions for the parallel holes and correction holes. Therefore, the purpose of flexible position selection can be achieved without designing too many holes. The correction hole is set at an angle to the central hole, and the axes of the parallel holes are parallel to those of the central hole. When the insertion position of the central hole is not suitable, it can be adjusted through the parallel holes based on the rotation of the guide post. When the insertion angle of the central hole is not suitable, it can be adjusted through the correction holes based on the rotation of the guide post. Thus, the guiding position and angle of the guide pin inserted into the femoral neck surgical guide of this application can be adjusted. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of a femoral neck surgical guide provided in one embodiment of the present invention;

[0032] Figure 2 This is another schematic diagram of the femoral neck surgical guide provided in one embodiment of the present invention;

[0033] Figure 3 This is a partial cross-sectional view of a femoral neck surgical guide provided in one embodiment of the present invention;

[0034] Figure 4 A top view of a guide post provided in one embodiment of the present invention;

[0035] Figure 5 for Figure 4 AA section view;

[0036] Figure 6 for Figure 4 BB cross-sectional view;

[0037] Figure 7 This is a front view of a guide post provided in one embodiment of the present invention;

[0038] Figure 8 for Figure 7 CC section view;

[0039] Figure 9 This is a schematic diagram of the positioning part and the guide post cooperating in one embodiment of the present invention;

[0040] Figure 10 This is another schematic diagram of the positioning part cooperating with the guide post in one embodiment of the present invention;

[0041] Figure 11 for Figure 3 DD sectional view;

[0042] Figure 12 To insert the initial guide pin into the center hole of the guide post;

[0043] Figure 13 To rotate the guide post to determine the new entry point, a guide pin for parallel alignment is inserted into the parallel hole;

[0044] Figure 14 To rotate the guide post to determine the new entry point, a guide pin of the angle is inserted into the correction hole;

[0045] Figure 15 Remove the initial guide pin after inserting the guide pin at the new entry point.

[0046] Explanation of reference numerals in the attached figures:

[0047] 100. Base; 110. Mounting through hole; 111. First hole; 112. Second hole; 120. Support plate; 130. Guide plate;

[0048] 200, guide section; 210, guide post; 201, first end; 202, second end; 211, center hole; 212, parallel hole; 213, straightening hole; 220, first limiting groove; 221, limiting protrusion;

[0049] 300, Positioning part; 310, Button; 311, Slide groove; 312, First slide groove section; 313, Second slide groove section; 314, Clearance groove; 315, Locking tongue; 320, Cylindrical pin; 330, Ball head pin; 331, Second limiting groove; 340, Elastic element;

[0050] 400. Guide pin;

[0051] 500. Femur;

[0052] 600. Operating handle; 610. Handle; 620. Fixed connecting rod; 630. Threaded connecting rod; 640. Limit pin;

[0053] 700, positioning pin;

[0054] α - The angle between the correction hole and the center hole;

[0055] β - Forward tilt angle. Detailed Implementation

[0056] Specific embodiments of the present invention will now be described with reference to the accompanying drawings. During this process, the thickness of lines or the size of structural elements shown in the drawings may be exaggerated for clarity and convenience. Furthermore, the terminology used thereafter is defined in consideration of its function in the present invention and may vary depending on the intention or convention of the user, operator, or practitioner. Therefore, the definition of such terminology should be based on the overall content of this specification.

[0057] For example, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0058] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0059] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0060] In related technologies, the guide's base does not have an anteversion angle. Based on the fact that the axis of the human femoral head and the femoral shaft have an angle of about 130 degrees, during the operation, when the base is directly fitted onto the femoral head to insert the positioning pin, it is difficult to insert the positioning pin parallel to the axis of the femoral head. In addition, the position and angle of the guide hole are fixed, and they are all positioned by fitting the base (plate) with the shape of the femur. They cannot be adjusted according to the characteristics of the patient's femur, and cannot place the screw in a more accurate position.

[0061] Based on the analysis and findings of the above-mentioned problems, this application is hereby submitted.

[0062] This application provides a femoral neck surgical guide, comprising:

[0063] The base has an anteversion angle adapted to the femoral neck. The base has a mounting through hole, the axis of which is perpendicular to a plane on the base located on one side of the anteversion angle and extends to a plane on the base located on the other side of the anteversion angle.

[0064] The guide portion includes a guide post for insertion into the mounting through hole and rotatable. The guide post has a through center hole, a parallel hole, and a correction hole. The guide post includes a first end and a second end opposite to each other. The center hole is coaxially arranged with the guide post. The parallel hole and the correction hole are arranged at equal intervals with the center hole on the end face of the first end. The parallel hole is parallel to the center hole. The correction hole is at an angle to the center hole and intersects the end face of the second end.

[0065] A positioning part is used to limit the guide part to be positioned on the base at a specified rotation angle.

[0066] The femoral neck surgical guide provided by the present invention mainly consists of a base, a guide part and a positioning part. The base is provided with a forward tilt angle, which allows the base to fit better against the bone surface and facilitates the application of external force.

[0067] During use, this application allows for adjustments based on the femoral characteristics of different patients. Specifically, by rotating the guide post, the corresponding positions of the parallel holes and correction holes on the femur can be changed, thereby adjusting the insertion position of the positioning pin and placing the hollow screw in the appropriate position. The guide post can rotate relative to the base, providing multiple rotational positions for the parallel holes and correction holes. Therefore, the purpose of flexible position selection can be achieved without designing too many holes. The correction hole is set at an angle to the central hole, and the axes of the parallel holes are parallel to those of the central hole. When the insertion position of the central hole is not suitable, it can be adjusted through the parallel holes based on the rotation of the guide post. When the insertion angle of the central hole is not suitable, it can be adjusted through the correction holes based on the rotation of the guide post. Thus, the guiding position and angle of the guide pin inserted into the femoral neck surgical guide of this application can be adjusted.

[0068] In some alternative embodiments, the second end of the guide post extends axially and tapers radially. In these embodiments, the guide post is generally in the form of a cylinder connected to a frustum, with the central hole and the correction hole protruding from the smaller bottom surface of the frustum, and the parallel hole protruding from the side surface of the frustum. Thus, during use, based on the setting of the base's anteversion angle, one surface of the base fits against the femur, and the other surface forming the anteversion angle is perpendicular to the axis of the mounting through hole. When the guide post is inserted into the base through the mounting through hole, the end of the frustum passes through the surface of the base that fits against the femur and abuts against the femur. The tapering design of the frustum can provide a clearance function, thereby guiding the central hole or correction hole to reach the femoral surface directly, improving the accuracy of guide pin insertion.

[0069] In some optional embodiments, the corrective holes include a first corrective hole and a second corrective hole, which are disposed opposite to each other on both sides of the central hole on the end face of the first end. Preferably, the parallel holes include a first parallel hole and a second parallel hole respectively disposed between the first corrective hole and the second corrective hole, and the first parallel hole, the second parallel hole, the first corrective hole, and the second corrective hole are evenly distributed on the end face of the first end with the central hole as the center. In these embodiments, the symmetrical first corrective hole and second corrective hole, as well as the symmetrical first parallel hole and second parallel hole, centered on the central hole, can reduce the rotation angle of the guide when reaching the position with a specified rotation angle. Of course, multiple corrective holes and parallel holes can also be disposed on the same circle with the central hole as the center, all of which serve to reduce the number of rotations and improve the efficiency of accurately placing the device into the specified position.

[0070] In some optional embodiments, the angle between the correction hole and the center hole is set to α, and the value of α is greater than 0 degrees and less than or equal to 5 degrees; preferably, the value of α is 5 degrees.

[0071] In some optional embodiments, the guide post is provided with a first limiting groove in the circumferential direction, and the bottom wall of the first limiting groove is provided with limiting protrusions arranged at equal intervals.

[0072] The positioning part is disposed on the base. When the guide part is inserted into the mounting through hole, the positioning part corresponds to the first limiting groove. In these embodiments, the setting of the limiting protrusion allows the ball head pin connected below the elastic element in the positioning part to move up and down with the rotation of the guide post. When the ball head pin is limited by the button of the positioning part, the ball head pin is located between two adjacent limiting protrusions in the first limiting groove and cannot move up and down. Based on the raised structure of the limiting protrusion, even if a rotational force is applied to the guide post, the limiting protrusion cannot allow the ball head pin to pass through. Thus, the guide part is positioned at the specified rotation position and cannot move, thereby playing a limiting role.

[0073] In some optional embodiments, the positioning part includes:

[0074] A button includes a pressing end and a free end, with a groove between the pressing end and the free end. The groove passes through a cylindrical pin fixed in the base. The groove includes a first groove section and a second groove section. The first groove section is close to the pressing end, and the groove width of the first groove section is adapted to the cylindrical pin. The groove width of the second groove section is greater than that of the cylindrical pin. A clearance groove is provided on the side of the button, corresponding to the second groove section. A locking tongue is provided between the clearance groove and the pressing end.

[0075] The elastic part, arranged radially along the mounting through hole, includes an elastic element fixed at one end in the base body. The free end of the elastic element is connected to a ball head pin. The ball head pin has a second limiting groove adapted to the locking tongue in the circumferential direction. The free end of the ball head pin extends into the mounting through hole. When the guide part is placed in the mounting through hole and the button is in the natural state, the cylindrical pin is located in the second sliding groove section. The clearance groove corresponds to the first limiting groove. The ball head pin contacts the bottom wall of the first limiting groove and can move up and down on the bottom wall of the first limiting groove as the guide part rotates.

[0076] When the guide part is rotated to a specified angle, the button is pressed, the cylindrical pin is located in the first sliding groove section, the locking tongue is embedded in the second limiting groove on the ball head pin, the ball head pin is positioned between two adjacent limiting protrusions in the first limiting groove, and the guide part is fixed in the base.

[0077] In some optional embodiments, the base includes a guide plate and a support plate arranged at an angle, the angle between the guide plate and the support plate forming the anteversion angle. The support plate conforms to the shape of the femur, and the mounting through-hole is perpendicular to the guide plate. In these embodiments, the base is configured to be approximately V-shaped, which can be considered as a hollowed-out base. This not only retains the anteversion angle but also reduces the weight and volume of the guide.

[0078] In some alternative embodiments, the anteversion angle is 130 degrees. In these embodiments, considering that the angle between the axis of the human femoral head and the femoral shaft is typically 130 degrees, setting the anteversion angle of the guide base to 130 degrees ensures that the cannulated screw can be implanted parallel to the axis of the femoral head.

[0079] In some optional embodiments, the free end of the guide plate is also provided with an operating handle. By providing the operating handle on the guide plate, based on the forward tilt angle, when the support plate is in contact with the femur, the free end of the guide plate extends obliquely upwards, making it easier for the operating handle to apply force to the substrate at this angle. Of course, it is more preferable to set the operating handle perpendicular to the support plate.

[0080] In some optional embodiments, the operating handle includes a handle, a fixed connecting rod, and a threaded connecting rod. The two ends of the fixed connecting rod are respectively inserted into the free ends of the handle and the guide plate. The threaded connecting rod is arranged parallel to the fixed connecting rod, and its two ends are threadedly connected to the free ends of the handle and the guide plate, respectively. In these embodiments, providing one fixed connecting rod and one threaded connecting rod facilitates the disassembly of the entire operating handle. When using both the fixed connecting rod and the threaded connecting rod, the connecting rod can be fixed to the base without welding, allowing the handle, fixed connecting rod, threaded connecting rod, and base to be assembled; it is easy to assemble and disassemble. The reason for using one threaded connecting rod and one fixed connecting rod instead of two threaded connecting rods simultaneously is to facilitate installation and disassembly while ensuring connection strength. For example, during assembly, the fixed connecting rod can be pre-fixed by directly inserting it into the handle and the base plate, and then the threaded connecting rod can be used to thread and fix it to the handle and the base plate.

[0081] In some optional embodiments, the handle is further provided with a limiting pin, which passes through the fixing link and is inserted into the handle. In these embodiments, to strengthen the connection between the fixing link and the handle, the fixing link can be radially fixed with the limiting pin.

[0082] In some optional embodiments, the support plate is further provided with positioning pins distributed around the mounting through holes to fix the base plate to the femur.

[0083] Example

[0084] Please see Figure 1 This application provides a femoral neck surgical guide, including a base 100, a guide portion 200, and a positioning portion 300. The base 100 has an anteversion angle β adapted to the femoral neck. A mounting through hole 110 is provided on the base 100. The axis of the mounting through hole 110 is perpendicular to the plane on the base 100 located on one side of the anteversion angle β and extends to the plane on the base 100 located on the other side of the anteversion angle β. It can be understood that the mounting through hole 110 includes a first hole 111 and a second hole 112 coaxially arranged. The guide portion 200 includes a guide post 210 for insertion into the mounting through hole 110 (first hole 111) and is rotatable. Please refer to [reference needed]. Figures 4-8 The guide post 210 has a through central hole 211, a parallel hole 212, and a correction hole 213. The guide post 210 includes a first end 201 and a second end 202. The central hole 211 is coaxially arranged with the guide post 210. The parallel hole 212 and the correction hole 213 are arranged at equal intervals with the central hole 211 on the end face of the first end 201. The parallel hole 212 is parallel to the central hole 211, and the correction hole 213 is at an angle to the central hole 211 and intersects on the end face of the second end 202. (See also...) Figures 1-3 The positioning part 300 is used to limit the guide part 200 to the base 100 at a specified rotation angle. Here, the specified angle means that when the guide needle 400 is not properly inserted from the center hole 211, the guide post 210 needs to be rotated according to the actual situation to determine the best insertion point. The angle rotated at this time is the specified angle.

[0085] The femoral neck surgical guide provided by this invention mainly consists of a base 100, a guide part 200, and a positioning part 300. The base 100 is provided with an anteversion angle β, which allows the base 100 to better fit the bone surface and facilitates the application of external force. During use, this invention can be adjusted according to the characteristics of different patients' femurs 500. Specifically, by rotating the guide post 210, the corresponding positions of the parallel holes 212 and the correction holes 213 on the femur 500 are changed, thereby adjusting the insertion position of the guide pin 400 and placing the hollow screw in the appropriate position. The guide post 210 can rotate relative to the base 100, allowing the parallel holes 212 and the correction holes 213 to have multiple rotational positions. Therefore, it is not necessary to design too many holes to achieve flexible position selection. The correction hole 213 is set at an angle to the central hole 211, and the parallel hole 212 is parallel to the axis of the central hole 211. When the needle insertion position of the central hole 211 is not suitable, it can be adjusted through the parallel hole 212 based on the rotation of the guide post 210. When the needle insertion angle of the central hole 211 is not suitable, it can be adjusted through the correction hole 213 based on the rotation of the guide post 210. Thus, the guiding position and angle of the guide needle 400 inserted into the femoral neck surgical guide of this application can be adjusted.

[0086] Please continue reading. Figures 1-3 In this application, the base 100 can be a block with an anteversion angle β. Considering that the angle between the axis of the human femoral head and the femoral shaft 500 is usually 130 degrees, in this embodiment, the anteversion angle of the base 100 of the guide is also set to 130 degrees, so as to ensure that the hollow screw can be implanted parallel to the axis of the femoral head.

[0087] In order to reduce the weight and volume of the guide, the base 100 in this embodiment is set to be approximately V-shaped, which can be regarded as a hollow state of the block base 100. The base 100 includes a guide plate 130 and a support plate 120 set at an angle. The angle between the guide plate 130 and the support plate 120 forms the forward tilt angle β. The support plate 120 fits the shape of the femur 500. The mounting through hole 110 is set perpendicular to the guide plate 130, that is, the first hole 111 is opened on the guide plate 130 and the second hole 112 is opened on the support plate 120.

[0088] Please continue reading. Figures 4-8In this embodiment, the second end 202 of the guide post 210 extends axially and contracts radially. Therefore, the guide post 210 can be considered as a combination of a cylinder and a frustum. Based on the frustum, the center hole 211 and the correction hole 213 on the guide post 210 protrude from the smaller bottom surface of the frustum, and the parallel hole 212 protrudes from the side surface of the frustum. The frustum provides precise guidance. To reduce the number of rotations of the guide post 210, multiple parallel holes 212 and / or correction holes 213 can be provided. A more reasonable approach is to use multiple parallel holes 212 and / or correction holes 213. Figure 4 As shown in Figure 8, on the end face of the first end 201, symmetrical first and second correction holes, as well as symmetrical first and second parallel holes, are provided with the central hole 211 as the center. That is, the first and second parallel holes are located between the first and second correction holes, respectively. The first parallel holes, second parallel holes, first correction holes, and second correction holes are evenly distributed on the end face of the first end with the central hole 211 as the center. Please refer to [reference needed]. Figure 5 In this embodiment, the angle between the correction hole 213 and the center hole 211 is set to α, and the value of α can be greater than 0 degrees and less than or equal to 5 degrees; in this embodiment, the value of α is 5 degrees.

[0089] In addition, when the guide part 200 rotates to the appropriate position, a positioning part 300 is provided on the base 100 of this embodiment for easy positioning. At the same time, a first limiting groove 220 that cooperates with the positioning part 300 is also opened in the circumference of the guide post 210. The specific limiting principle will be explained in detail below:

[0090] Please refer to Figures 9-11The positioning part 300 includes a button 310 and an elastic part. The button 310 includes a pressing end and a free end, and a groove 311 is provided between the pressing end and the free end. The groove 311 passes through a cylindrical pin 320 fixed in the base 100. The groove 311 includes a first groove section 312 and a second groove section 313. The first groove section 312 is close to the pressing end, and the groove width of the first groove section 312 is adapted to the cylindrical pin 320. The groove width of the second groove section 313 is greater than that of the cylindrical pin 320. The button 310 has a side opening. A clearance groove 314 is provided, which corresponds to the second sliding groove section 313. A locking tongue 315 is provided between the clearance groove 314 and the pressing end. The elastic part is arranged radially along the mounting through hole 110, including an elastic element 340 with one end fixed in the base 100. The free end of the elastic element 340 is connected to a ball head pin 330. The ball head pin 330 has a second limiting groove 331 circumferentially opened to match the locking tongue 315. The free end of the ball head pin 330 extends into the mounting through hole 110. When the guide part 200 is placed in the mounting through hole 110 and When button 310 is in its natural state, cylindrical pin 320 is located within the second slide section 313, clearance groove 314 corresponds to the first limiting groove 220, and ball head pin 330 contacts the bottom wall of the first limiting groove 220. The bottom wall of the first limiting groove 220 is provided with equally spaced limiting protrusions 221. Under the action of elastic element 340 and limiting protrusions 221, ball head pin 330 can move up and down on the bottom wall of the first limiting groove 220 as the guide part 200 rotates. When the guide part 200 rotates to a specified angle, button is pressed. 310, the cylindrical pin 320 is located in the first sliding groove section 312, the locking tongue 315 is embedded in the second limiting groove 331 on the ball head pin 330, the ball head pin 330 is positioned between two adjacent limiting protrusions 221 in the first limiting groove 220, and cannot move up and down. Based on the raised structure of the limiting protrusions 221, even if a rotational force is applied to the guide post 210, the limiting protrusions 221 cannot allow the ball head pin 330 to pass through, so the guide part 200 is positioned at the designated rotational position and cannot move, thereby playing a limiting role.

[0091] Please see Figures 1-3 In order to facilitate the application of force, this embodiment also provides an operating handle 600 at the free end of the guide plate 130. Preferably, the operating handle 600 can be set to be perpendicular to the support plate 120.

[0092] Please continue reading. Figure 2 The operating handle includes a handle 610, a fixed connecting rod 620, and a threaded connecting rod 630. The two ends of the fixed connecting rod 620 are respectively inserted into the free ends of the handle 610 and the guide plate 130. The threaded connecting rod 630 is arranged parallel to the fixed connecting rod 620, and its two ends are threadedly connected to the free ends of the handle 610 and the guide plate 130, respectively. Please refer to [link / reference]. Figure 3The handle 610 is also provided with a limit pin 640, which passes through the fixed connecting rod 620 and is inserted into the handle 610.

[0093] For more precise positioning, please continue reading. Figure 3 The application also provides positioning pins 700 on the support plate 120. The positioning pins 700 are distributed around the mounting through hole 110 to fix the base plate 100 to the femur 500.

[0094] The following will provide an example of how to use this application:

[0095] Please see Figure 12 First, the base 100 is fixed to the femur 500 by the positioning pin 700, and then the guide pin 400 is inserted into the central hole 211.

[0096] When it is found that the needle insertion point is unsuitable and requires parallel calibration, please refer to [the relevant documentation]. Figure 13 Rotate the guide 200 to determine the new entry point (left / right or down / up in the center hole), and then insert a new guide pin 400 into the parallel hole 212. (See [link to documentation]). Figure 15 Then remove the initial guide pin 400.

[0097] When it is found that the needle insertion point requires angle correction α (for example, 5 degrees) and entry point correction (for example, 5mm), please refer to [the relevant documentation]. Figure 14 Rotate the guide 200 to define the new needle insertion point, and then insert a new guide needle 400 into the 5-degree correction hole 213. (See also...) Figure 15 Then remove the initial guide pin 400.

[0098] When it is found that the needle insertion point requires angle correction α (taking 5 degrees as an example) and the same entry point, insert the correction guide needle into the initial 5-degree correction hole 213, rotate the guide part 200 to select a new temporary entry point, insert a new guide needle 400 into the parallel hole 212, and remove the guide needle 400 set in the initial correction hole 213. Then, use a new guide needle 400 to pass through the 5-degree correction hole 213 to correct the angle.

[0099] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A surgical guide for femoral neck, characterized in that, include; A base having an anteversion angle adapted to the femoral neck, the base having a mounting through hole, the axis of the mounting through hole being perpendicular to a plane on the base located on one side of the anteversion angle and extending to a plane on the base located on the other side of the anteversion angle; the base includes a guide plate and a support plate arranged at an angle, the angle between the guide plate and the support plate forming the anteversion angle, the support plate fitting the shape of the femur, and the mounting through hole being perpendicular to the guide plate; The guide portion includes a guide post for insertion into the mounting through hole and rotatable. The guide post has a through center hole, a parallel hole, and a correction hole. The guide post includes a first end and a second end opposite to each other. The center hole is coaxially arranged with the guide post. The parallel hole and the correction hole are arranged at equal intervals with the center hole on the end face of the first end. The parallel hole is parallel to the center hole. The correction hole is at an angle to the center hole and intersects the end face of the second end. A positioning part is used to limit the guide part to be positioned on the base at a specified rotation angle; The specified rotation angle refers to the angle at which the guide pin needs to be rotated to determine the optimal insertion point when the guide pin is not properly inserted through the center hole.

2. The femoral neck surgical guide according to claim 1, characterized in that, The second end of the guide post extends along the axial direction of the guide post and contracts radially.

3. The femoral neck surgical guide according to claim 1, characterized in that, The correction hole includes a first correction hole and a second correction hole, which are disposed opposite to each other on both sides of the central hole on the end face of the first end.

4. The femoral neck surgical guide according to claim 3, characterized in that, The parallel holes include a first parallel hole and a second parallel hole respectively disposed between the first correction hole and the second correction hole. The first parallel hole, the second parallel hole, the first correction hole and the second correction hole are evenly distributed on the end face of the first end with the central hole as the center.

5. The femoral neck surgical guide according to claim 1, characterized in that, If the angle between the correction hole and the center hole is set to α, then the value of α is greater than 0 degrees and less than or equal to 5 degrees.

6. The femoral neck surgical guide according to claim 5, characterized in that, The value of α is 5 degrees.

7. The femoral neck surgical guide according to any one of claims 1-6, characterized in that, The guide post has a first limiting groove in its circumferential direction, and the bottom wall of the first limiting groove has limiting protrusions arranged at equal intervals. The positioning part is disposed on the base. When the guide part is inserted into the mounting through hole, the positioning part corresponds to the first limiting groove.

8. The femoral neck surgical guide according to claim 7, characterized in that, The positioning unit includes: A button includes a pressing end and a free end, with a sliding groove between the pressing end and the free end. The sliding groove passes through a cylindrical pin fixed in the base. The sliding groove includes a first sliding groove section and a second sliding groove section. The first sliding groove section is close to the pressing end, and the groove width of the first sliding groove section is adapted to the cylindrical pin. The groove width of the second sliding groove section is greater than that of the cylindrical pin. A clearance groove is provided on the side of the button, corresponding to the second sliding groove section. A locking tongue is provided between the clearance groove and the pressing end. The elastic part, arranged radially along the mounting through hole, includes an elastic element fixed at one end in the base, a ball pin connected to the free end of the elastic element, a second limiting groove adapted to the locking tongue on the circumferential direction of the ball pin, and the free end of the ball pin extending into the mounting through hole. When the guide part is placed in the mounting through hole and the button is in the natural state, the cylindrical pin is located in the second sliding groove section, the clearance groove corresponds to the first limiting groove, the ball pin contacts the bottom wall of the first limiting groove, and can move up and down on the bottom wall of the first limiting groove as the guide part rotates. When the guide part is rotated to a specified angle, the button is pressed, the cylindrical pin is located in the first sliding groove section, the locking tongue is embedded in the second limiting groove on the ball head pin, the ball head pin is positioned between two adjacent limiting protrusions in the first limiting groove, and the guide part is fixed in the base.

9. The femoral neck surgical guide according to claim 1, characterized in that, The free end of the guide plate is also provided with an operating handle.

10. The femoral neck surgical guide according to claim 9, characterized in that, The operating handle includes a handle, a fixed connecting rod, and a threaded connecting rod. The two ends of the fixed connecting rod are respectively inserted into the free ends of the handle and the guide plate. The threaded connecting rod is arranged parallel to the fixed connecting rod, and the two ends of the threaded connecting rod are respectively threaded to the free ends of the handle and the guide plate.

11. The femoral neck surgical guide according to claim 10, characterized in that, The handle is also provided with a limiting pin, which passes through the fixed connecting rod and is inserted into the handle.

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