A positioning guide for subtrochanteric osteotomy
By designing a surgical positioning guide for subtrochanteric osteotomy, the problem of complex and low accuracy of z-shaped osteotomy is solved, and higher accuracy and stability of osteotomy is achieved, reducing the difficulty of surgery.
Patent Information
- Application Number
- CN202411652556.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-04-01
AI Technical Summary
In subtrochanteric osteotomy surgery, it is difficult for the prior art to achieve accurate z-shaped osteotomy, resulting in unstable osteotomy ends, affecting bone healing and the function of artificial hip joints, especially in complex operations and requiring high accuracy.
A positioning guide for undertrochanteric osteotomy is designed, including outer jacket guide rods, embedded guide rods, curved guide rods, reverse bend rods and transverse guide rods. Through the cooperation of these components, the path and length of the bone saw cutting are defined to ensure the accuracy and stability of the osteotomy.
This device can significantly improve the accuracy and stability of z-shaped osteotomy, reduce the difficulty of surgery, reduce the doctor's dependence on experience, and effectively avoid the situation of skewed and irregular cutting.
Smart Images
Figure CN119732721A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of subtrochanteric osteotomy surgery, in particular to a positioning guide for subtrochanteric osteotomy. Background Art
[0002] Subtrochanteric osteotomy is a commonly used procedure for total hip replacement in patients with high dislocation and congenital hip dysplasia. It can assist in joint reduction and effectively reduce the incidence of vascular and nerve traction loss during reduction. Among them, transverse osteotomy is one of the common methods of subtrochanteric osteotomy. Previously, surgeons relied on visual estimation or manual marking by electric knife for osteotomy positioning, which easily resulted in the osteotomy lines at both ends of the shortening osteotomy not being parallel and the distance between the osteotomy positions being difficult to determine. This resulted in poor control of the shortening length and the inability to completely align the two ends of the osteotomy, affecting the reduction of the osteotomy ends and the healing of the osteotomy sites.
[0003] At present, transverse osteotomy is still the mainstream treatment option. This osteotomy method is relatively simple and easy to operate. This transverse osteotomy is precisely aligned. After the operation is completed, because it is a transverse cutting path, the cross-section formed is relatively flat, resulting in no axial limit on the bones that are subsequently connected. As a result, the bones that have been cut at the upper and lower ends are prone to axial torsion along the axis of the bone, resulting in instability of the osteotomy ends, which in turn affects bone healing between the osteotomy ends, and then leads to artificial hip joint disorders, which seriously affects the patient's quality of life, especially for patients with heavier body weight. When they fall hard and bear weight, the osteotomy bones are prone to axial torsion. Therefore, doctors have also developed new ideas for osteotomy, such as Z-shaped osteotomy or V-shaped osteotomy. These shapes are the shapes of the osteotomy surface, that is, the osteotomy surface is V-shaped or Z-shaped, such as Figure 7 or Figure 8 The figures show V-shaped osteotomy and Z-shaped osteotomy, which cut off a section of the patient's overlong bones so that the patient's bones can be level with both feet to provide stable support for the human body.
[0004] Although V-shaped osteotomy also has the function of preventing axial torsion, it does not directly prevent torsion because the cross-sections that block each other are still inclined. When the force is particularly large, the blocking force is still insufficient. Therefore, Z-shaped osteotomy is currently the best osteotomy method. This operation requires cutting the bone into two sections, and also requires cutting the two cut bones in half horizontally. Figure 8 As shown in the figure, a Z-shaped bone splicing surface can be finally formed, which can effectively avoid the longitudinal torsion of the osteotomy ends after transverse osteotomy, ensure axial stability, improve the stability of the osteotomy ends, and facilitate bone healing at the osteotomy ends.
[0005] This type of Z-shaped mortise and tenon osteotomy takes a long time to operate, and the operation process must be reviewed. It generally requires a doctor with rich experience to complete the operation. During the Z-shaped mortise and tenon osteotomy operation, it is easy for the Z-shaped osteotomy line to be uneven, and the osteotomy lines at both ends of the osteotomy are not parallel, resulting in poor control of the shortening length, and the two ends of the osteotomy cannot be completely aligned, which seriously affects the reduction of the osteotomy end and bone healing.
[0006] Although the joint surface of the Z-shaped osteotomy is good in preventing axial torsion, this type of osteotomy is very difficult to operate. Clinical surgical operations and precise cutting after measuring the size are very difficult, especially vertical and horizontal cutting. The cutting instrument can easily cut crooked, causing the final joint surface of the bone to be skewed, and ultimately the upper and lower bones cannot be spliced together. This Z-shaped osteotomy requires a very high level of experience from the doctor, and requires an accuracy of less than 0.5mm, including the vertical and horizontal sections. The more accurate the error range needs to be, the more accurate the splicing gap will be when the subsequent osteotomy is completed and spliced. This osteotomy method is difficult to accurately position, and can only be pre-marked on the bone and cut along the marked line. The marking line is not a limit. During the operation, there is currently no effective way to limit the direction of the bone saw, which is also the main reason for the difficulty of this osteotomy method.
[0007] Based on this, the present invention designs a positioning guide for subtrochanteric osteotomy to solve the above problems. Summary of the invention
[0008] The purpose of the present invention is to provide a positioning guide for subtrochanteric osteotomy. The device can be specially designed for Z-shaped osteotomy operations and can be made into a bone saw cutting groove with specific guiding limits. The route of bone cutting can be limited so that the length and path of bone cutting can meet the pre-established design during clinical surgery, and the position and length of the required cutting can be conveniently adjusted. The device can also be accurately positioned on the bone through the positioning hole, so that the device can be firmly positioned on the bone at the surgical site, thereby ensuring that the path limited by the surgery is stable and reliable, thereby accurately performing Z-shaped osteotomy on the patient's bone, and greatly reducing the experience requirements for the doctor performing the surgery, and can effectively avoid crooked and uneven cutting.
[0009] The present invention is implemented as follows: a positioning guide for subtrochanteric osteotomy, comprising: Outer guide rods, curved guide rods, embedded guide rods, reverse curved rods and transverse guide rods; The outer sleeve guide rod and the inner sleeve guide rod are both flat straight rods; scale lines are set on the outer sleeve guide rod and the inner sleeve guide rod, and multiple positioning holes are also set on the outer sleeve guide rod and the inner sleeve guide rod; each positioning hole penetrates the outer sleeve guide rod or the inner sleeve guide rod; A straight-cutting chute is provided inside the outer sleeve guide rod, the lower end of the straight-cutting chute is open, and the upper end of the straight-cutting chute is closed inside the outer sleeve guide rod; A longitudinal cutting guide groove is also provided inside the embedded guide rod, the upper end of the longitudinal cutting guide groove is open, and the embedded guide rod blocks and closes the lower end of the longitudinal cutting guide groove; The embedded guide rod is detachably slidably arranged in the straight-cut slide groove, the open ends of the straight-cut slide groove and the longitudinal-cut guide groove are inserted oppositely, and the planes where the outer sleeve guide rod and the embedded guide rod are located are parallel to each other; The bending guide rod and the reverse bending rod are both arc-shaped sheet-shaped bending rods, and the end of the bending guide rod bent forward is connected to the upper end of the outer sleeve guide rod; the rear end of the bending guide rod extends to the right and surrounds the rear side of the outer sleeve guide rod, and a bending groove is provided in the bending guide rod, and the front end of the bending groove is connected to the straight cutting groove; The end of the reverse bending rod bent forward is connected to the lower end of the embedded guide rod; the rear end of the reverse bending rod extends to the left and bends around the rear side of the embedded guide rod, and a reverse bending groove is provided inside the reverse bending rod, and the front end of the reverse bending groove is connected to the longitudinal cutting guide groove; The transverse guide rod is a semicircular sheet-shaped hoop, and a transverse groove is provided on the transverse guide rod. The transverse groove coincides with the axis of the transverse guide rod, and the transverse groove is enclosed inside the transverse guide rod; a positioning plate is also provided on the transverse guide rod, and the positioning plate is a sheet-shaped structure, and a transverse limiting hole is provided on the positioning plate.
[0010] Furthermore, the outer sleeve guide rod and the curved guide rod are an integral structure, the straight cut groove and the curved cut groove form a complete L-shaped channel, and the straight cut groove is perpendicular to the plane where the curved cut groove is located; The embedded guide rod and the anti-bending rod are also integral structures; The longitudinal guide groove and the reverse bending groove form a complete L-shaped channel connected, and the longitudinal guide groove is perpendicular to the plane where the reverse bending groove is located; The planes where the reverse bending rod and the bending guide rod are located are parallel to each other, and the planes where the axes of the bending cutting groove and the reverse bending groove are located are also parallel to each other.
[0011] Furthermore, at least three positioning holes are provided at the upper end of the outer sleeve guide rod; The lower end of the embedded guide rod is also provided with at least three positioning holes; The axes of the outer sleeve guide rod and the embedded guide rod are in the same straight line as the connecting line of the plurality of positioning holes.
[0012] Furthermore, there are at least two transverse limiting holes, and the two transverse limiting holes are symmetrically arranged on the positioning piece; The positioning sheet is a flat sheet structure. The vertical axis of the positioning piece coincides with the vertical axis of the horizontal guide rod; The transverse guide rod is an integral steel sheet that can be bent and deformed.
[0013] The beneficial effects of the present invention are as follows: 1. The present invention can accurately locate the surgical site of the bone through the outer sleeve guide rod and the inner sleeve guide rod, and limit the truncation path through the straight cutting groove and the longitudinal cutting guide groove, so that the vertical osteotomy is more accurate, and the transverse curved cutting groove and the reverse curved groove are added to make the transverse Z-shaped osteotomy path clearer, and the transverse osteotomy can be performed more accurately to form an accurate Z-shaped osteotomy surface, simplifying the osteotomy operation and making the osteotomy path more accurate; 2. The addition of a transverse guide rod can accurately perform transverse osteotomy, making the osteotomy surface smoother, and accurately calibrate the bone through the transverse guide rod. The osteotomy positioning does not require hand support, and the Kirschner wire is used for positioning, making the transverse osteotomy path more accurate, and the upper and lower sections of the Z-shaped osteotomy and the middle section can be kept parallel; 3. The straight cutting groove and the longitudinal cutting groove are added so that they can slide and connect with each other, so that the height spacing of the bending guide rod and the reverse bending rod can be adjusted, and the osteotomy path and osteotomy height can be limited before osteotomy, which makes the operation more accurate and less prone to deviation, and provides more convenient assistance to the Z-shaped osteotomy path, effectively improving the accuracy of osteotomy and reducing the difficulty of this osteotomy method. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The present invention will be further described below in conjunction with embodiments with reference to the accompanying drawings.
[0015] Figure 1 It is a schematic structural diagram of the outer sleeve guide rod and the inner sleeve guide rod in the inserted state of the present invention; Figure 2 It is a schematic diagram of the structure of the outer sleeve guide rod and the inner sleeve guide rod being separated from each other; Figure 3 This is a schematic diagram of the structure of the transverse guide rod of the present invention; Figure 4 It is a schematic diagram of the cross-sectional structure of the sliding fit between the outer sleeve guide rod and the inner guide rod of the present invention; Figure 5 It is a schematic diagram of the overall top view structure of the present invention; Figure 6 It is a schematic diagram of the top view of the structure of the transverse guide rod of the present invention; Figure 7 It is a schematic diagram of the bone cutting state structure of the V-shaped osteotomy of the present invention; Figure 8 It is a schematic diagram of the bone cutting state and cross-section splicing state of the Z-shaped osteotomy of the present invention; Fig. 9 This is a schematic diagram of the complete use state of the present invention; Fig.10 It is a schematic diagram of the cooperation between the straight-cut slide groove and the embedded guide rod of the present invention.
[0016] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1-outer guide rod, 11-bent guide rod, 12-straight cutting groove, 13-bent cutting groove, 2-embedded guide rod, 21-reverse bending rod, 22-longitudinal cutting guide groove, 23-reverse bending groove, 3-transverse guide rod, 31-transverse cutting groove, 32-positioning piece, 33-transverse cutting limit hole, 4-positioning hole, 41-scale line. DETAILED DESCRIPTION
[0017] See also Figures 1 to 10 As shown, the present invention provides a positioning guide for subtrochanteric osteotomy. In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods of the specification.
[0018] In a specific embodiment of the technical solution of the present invention: It includes an outer sleeve guide rod 1, a bent guide rod 11, an embedded guide rod 2, an anti-bending rod 21 and a transverse guide rod 3; The outer sleeve guide rod 1 and the inner sleeve guide rod 2 are both flat straight rods; scale lines 41 are set on the outer sleeve guide rod 1 and the inner sleeve guide rod 2, and multiple positioning holes 4 are also set on the outer sleeve guide rod 1 and the inner sleeve guide rod 2; each positioning hole 4 penetrates the outer sleeve guide rod 1 or the inner sleeve guide rod 2; A straight-cut chute 12 is provided inside the outer sleeve guide rod 1, the lower end of the straight-cut chute 12 is open, and the upper end of the straight-cut chute 12 is closed inside the outer sleeve guide rod 1; A longitudinal cutting guide groove 22 is also provided inside the embedded guide rod 2. The upper end of the longitudinal cutting guide groove 22 is open, and the embedded guide rod 2 blocks and closes the lower end of the longitudinal cutting guide groove 22. The embedded guide rod 2 can be slidably disposed in the straight cutting groove 12, the opening ends of the straight cutting groove 12 and the longitudinal cutting groove 22 are inserted oppositely, the planes where the outer sleeve guide rod 1 and the embedded guide rod 2 are located are parallel to each other, and the vertical axes of the outer sleeve guide rod 1, the longitudinal cutting groove 22, the straight cutting groove 12 and the embedded guide rod 2 coincide; The bending guide rod 11 and the anti-bending rod 21 are both arc-shaped sheet-shaped bending rods, and the end of the bending guide rod 11 that bends forward is connected to the upper end of the outer sleeve guide rod 1; the rear end of the bending guide rod 11 extends rightward around the rear side of the outer sleeve guide rod 1, and a bending groove 13 is provided in the bending guide rod 11, and the front end of the bending groove 13 is connected to the straight cutting groove 12, and the rear end of the bending groove 13 is closed to form a closed through groove; The end of the reverse bending rod 21 bent forward is connected to the lower end of the embedded guide rod 2; the rear end of the reverse bending rod 21 is bent leftward around the rear side of the embedded guide rod 2, and a reverse bending groove 23 is provided inside the reverse bending rod 21. The front side end of the reverse bending groove 23 is connected to the longitudinal cutting guide groove 22, and the rear side end of the reverse bending groove 23 is also closed to form a closed cutting guide through groove; The outer sleeve guide rod 1 and the curved guide rod 11 are an integral structure, and the embedded guide rod 2 and the reverse curved rod 21 are also an integral structure; the integral structure can facilitate the outer sleeve guide rod 1 and the curved guide rod 11 as well as the embedded guide rod 2 and the reverse curved rod 21 to be hooped on the bone, that is, the curved guide rod 11 and the reverse curved rod 21 need to be respectively surrounded to the left and right sides, and symmetrically arranged on both sides of the outer sleeve guide rod 1 and the embedded guide rod 2; The straight cut groove 12 and the curved cut groove 13 form a complete L-shaped channel, and the straight cut groove 12 is perpendicular to the plane where the curved cut groove 13 is located; The longitudinal guide groove 22 and the anti-bending groove 23 form a connected complete L-shaped channel, and the longitudinal guide groove 22 is perpendicular to the plane where the anti-bending groove 23 is located; The planes where the anti-bending rod 21 and the bending guide rod 11 are located are parallel to each other, and the planes where the axes of the bending cutting groove 13 and the anti-bending groove 23 are located are also parallel to each other.
[0019] At least three positioning holes 4 are formed at the upper end of the outer sleeve guide rod 1; At least three positioning holes 4 are also provided at the lower end of the embedded guide rod 2; Kirschner wires are driven into the bone through the positioning holes 4, thereby fixing and positioning the outer guide rod 1 and the embedded guide rod 2 on the bone, so multiple positioning holes 4 are required to prevent the outer guide rod 1 and the embedded guide rod 2 from rotating due to external force during cutting.
[0020] The axes of the outer sleeve guide rod 1 and the inner sleeve guide rod 2 and the connecting line of the plurality of positioning holes 4 are in the same straight line.
[0021] The transverse guide rod 3 is a semicircular sheet-like hoop, and a transverse groove 31 is provided on the transverse guide rod 3. The transverse groove 31 coincides with the axis of the transverse guide rod 3, and the transverse groove 31 is enclosed inside the transverse guide rod 3; a positioning piece 32 is also provided on the transverse guide rod 3, and the positioning piece 33 is a sheet-like structure, and a transverse limiting hole 33 is provided on the positioning piece 32.
[0022] There are at least two transverse limiting holes 33, which are symmetrically arranged on the positioning piece 32; the positioning piece 33 is a flat sheet structure. The vertical axis of the positioning piece 33 coincides with the vertical axis of the horizontal guide rod 3; The transverse guide rod 3 is a steel sheet, which can be a thin steel sheet that can be slightly pressed to deform, fit and clamp the patient's leg bone, and perform fit positioning to ensure the accuracy of the osteotomy path.
[0023] It should be noted that: 1. The operation of bone sawing requires great strength. The bone is hard and the resistance during cutting is great. If there is no external force restriction and the doctor only relies on the support of his arm, it is easy to cause the bone to deviate due to the resistance of the bone. Z-shaped splicing, such as Figure 8As shown, one horizontal cut and two vertical cuts are required, and finally the upper and lower ends need to be cut horizontally in half. The bone sawing operation path is very complicated and it is easy to deflect at the corner of the path, which will cause the joint surface to be unable to be spliced after the bone sawing is completed. This device is designed to avoid this situation. The bone sawing path during the operation is limited to ensure the accuracy of the bone sawing path. The device can more conveniently locate the osteotomy site and perform precise osteotomy. It does not require a particularly experienced doctor to operate. As long as the doctor can normally complete the subtrochanteric osteotomy operation, the doctor can complete the Z-shaped mortise and tenon osteotomy through the guidance and positioning of the device, which greatly reduces the difficulty of osteotomy operation. 2. The length of the bone saw is limited. Some patients have a larger upward protrusion of the femur, while others have a smaller protrusion, so the length required to be cut is also different. The current method is to first detect the bone length, then calculate the length required for osteotomy, and finally design where the osteotomy position should be, and then mark and draw lines. As for whether the osteotomy length reaches the design during the final operation, it can only rely on the previously carved path, and the bone cannot be marked with lines, which makes the operation difficult and difficult to cut accurately. The device can adjust the vertical total length of the straight cutting groove 12 and the longitudinal cutting groove 22 by adjusting the insertion sliding depth between the outer sleeve guide rod 1 and the embedded guide rod 2, so as to achieve the purpose of adjusting the osteotomy length, and the adjustment is accurate, and can be accurately judged by the scale line 41, and is easy to use; 3. Although Z-shaped osteotomy can be completed manually at present, whether the matching relationship between the upper and lower end faces and the vertical section and the corresponding section is standard, especially whether the upper and lower sections are parallel to the middle transverse section, is a very important factor for the later splicing. If the upper and lower end faces and the middle transverse osteotomy surface are not parallel, they cannot be tightly spliced in the later stage, and it is difficult to grind the bones and the operation is difficult. This device utilizes the cooperation between the transverse guide rod 3, the bending guide rod 11 and the anti-bending rod 21 to lock these three components in the osteotomy position in advance and position them by Kirschner wires. As long as the three components are positioned to ensure the parallel and vertical relationship with each other, the later osteotomy surface can be ensured to be accurate. After the osteotomy is completed, the osteotomy surfaces can also be tightly spliced with each other.
[0024] When the present invention is used, the bone needs to be measured by an inspection device first, and the length of the bone to be cut off is determined, and then the cutting position is designed.
[0025] First, determine the cross-sectional position of the transverse cut and locate the cut. It is necessary to ensure the positional relationship between the Z-shaped osteotomy surfaces, and the osteotomy path needs to be limited by the transverse guide rod 3, the outer guide rod 1 and the embedded guide rod 2. Therefore, it is necessary to first lock the outer guide rod 1 and the embedded guide rod 2 at the required osteotomy position through Kirschner wires, measure and set the position in advance, and then use another Kirschner wire to fix the position of the transverse guide rod 3 to ensure that the transverse guide rod 3 is parallel to the curved guide rod 11 and the reverse curved rod 21. At the same time, the straight cutting groove 12 and the longitudinal cutting groove 22 are aligned with the vertical pre-set vertical osteotomy path of the bone. Generally speaking, the straight cutting groove 12 and the longitudinal cutting groove 22 need to coincide with the vertical axis of the bone.
[0026] First, position the outer sleeve guide rod 1 and the embedded guide rod 2. After measuring the position, pass the Kirschner wire through the multiple positioning holes 4 on the outer sleeve guide rod 1 and the embedded guide rod 2, and fix the outer sleeve guide rod 1 and the embedded guide rod 2 on the bone. At this time, the curved guide rod 11 bends backward along the right side and surrounds the back of the bone, while the reverse curved rod 21 bends backward along the left side and surrounds the back of the bone. In actual operation, the outer sleeve guide rod 1 and the embedded guide rod 2 can be swapped up and down as needed for easy operation, and ensure that the curved guide rod 11 and the reverse curved rod 21 are respectively surrounded by the back of the leg bone from different sides, and ensure that the positions of the curved guide rod 11 and the reverse curved rod 21 are symmetrical in reverse direction up and down.
[0027] Reposition the transverse guide rod 3, pass the Kirschner wire through the transverse limiting hole 33, pierce the positioning plate 32 into the bone for positioning, temporarily fix the entire transverse guide rod 3 on the bone, and then use a bone saw along the inside of the transverse groove 31 to cut the bone into two parts, the middle part is blocked by the outer sleeve guide rod 1 and the embedded guide rod 2, and only a very narrow section is blocked and cannot be sawed off, usually only 2-3mm, and then remove the transverse guide rod 3, and manually continue to saw off the last remaining connection along the cross section. Because there is already a stable cross section, the last section can be cut along the cross-sectional gap, which is simple to operate.
[0028] Then pull the protruding bone downward to reset it so that the supporting surfaces of the soles of the two feet are flush. At this time, the positions of the osteotomy surfaces will be misaligned, and then measure the height of the bone misalignment overlap, which is the height that needs to be sawed off. Then set the z-shaped cutting path and height spacing according to this height, that is, the height spacing between the bending guide rod 11 and the anti-bending rod 21. After measuring, it is calculated and obtained. Generally, the osteotomy height is between 2-5cm, and usually does not exceed 5cm. After obtaining the accurate truncation height, the truncated transverse osteotomy surface is spliced again, and then the bending guide rod 11 and the anti-bending rod 21 are positioned on the bone. The positioning is based on the bone section cross-cut before the transverse guide rod 3 as the reference plane.
[0029] The positions of the bending guide rod 11 and the reverse bending rod 21 from the transverse osteotomy section are measured and located by means of the graduation line 41 .
[0030] At this time, the embedded guide rod 2 needs to be slidably embedded in the straight cutting groove 12 of the outer guide rod 1, so that the straight cutting groove 12 and the longitudinal cutting groove 22 form a connected through groove, and then the bone is vertically cut along the through groove of the straight cutting groove 12 and the longitudinal cutting groove 22. Generally, the bone cutting height is between 2-5 cm, and the bone is vertically cut into two halves, and then horizontally cut to the right along the curved cutting groove 13, so that a semicircular column is cut off on the right side of the bone. Figure 8 As shown, the joint surfaces of the upper and lower sections of the bone form a mortise and tenon structure, thereby effectively improving the axial and radial torque bearing strength of the bones after splicing. The bone joint surface has high stability, which improves the bearing strength of the patient's bones after surgery.
[0031] Similarly, it is also necessary to cut the left half of the bone to the left along the anti-bend groove 23, and finally cut the bone into two semicircular step surfaces, shortening the upper and lower bones, forming a step-like z-shaped splicing surface, and then nail the bone firmly to form an integral bone. The torsional resistance of this bone is transmitted by the step surface, and the axial and radial force bearing capacity is strong. The cutting guidance of this device is more precise, and the requirements for the doctor's operating experience are greatly reduced.
[0032] The orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings and is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.
[0033] Although the specific implementation modes of the present invention are described above, those skilled in the art should understand that the specific implementation modes described are only illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.
Claims
1. A positioning guide for subtrochanteric osteotomy, characterized in that: include: An outer sleeve guide rod (1), a bent guide rod (11), an embedded guide rod (2), an anti-bend rod (21) and a transverse guide rod (3); The outer sleeve guide rod (1) and the embedded guide rod (2) are both flat straight rods; scale lines (41) are provided on the outer sleeve guide rod (1) and the embedded guide rod (2); and a plurality of positioning holes (4) are provided on the outer sleeve guide rod (1) and the embedded guide rod (2); each positioning hole (4) penetrates the outer sleeve guide rod (1) or the embedded guide rod (2); A straight-cut slide groove (12) is provided inside the outer sleeve guide rod (1), the lower end of the straight-cut slide groove (12) is open, and the upper end of the straight-cut slide groove (12) is closed inside the outer sleeve guide rod (1); A longitudinal cutting guide groove (22) is also provided inside the embedded guide rod (2), the upper end of the longitudinal cutting guide groove (22) is open, and the embedded guide rod (2) blocks and closes the lower end of the longitudinal cutting guide groove (22); The embedded guide rod (2) can be slidably disposed in the straight-cut slide groove (12) in a detachable manner, the open ends of the straight-cut slide groove (12) and the longitudinal-cut guide groove (22) are inserted opposite to each other, and the planes on which the outer sleeve guide rod (1) and the embedded guide rod (2) are located are parallel to each other; The bending guide rod (11) and the reverse bending rod (21) are both arc-shaped sheet-like bending rods, and the end of the bending guide rod (11) that bends forward is connected to the upper end of the outer sleeve guide rod (1); the rear end of the bending guide rod (11) extends rightward and surrounds the rear side of the outer sleeve guide rod (1), and a bending groove (13) is provided in the bending guide rod (11), and the front end of the bending groove (13) is connected to the straight cutting groove (12); The end of the reverse bending rod (21) bent forward is connected to the lower end of the embedded guide rod (2); the rear end of the reverse bending rod (21) extends leftward and bends around the rear side of the embedded guide rod (2); a reverse bending groove (23) is provided inside the reverse bending rod (21); the front end of the reverse bending groove (23) is connected to the longitudinal cutting guide groove (22); The transverse guide rod (3) is a semicircular sheet-shaped hoop, a transverse groove (31) is provided on the transverse guide rod (3), the transverse groove (31) coincides with the axis of the transverse guide rod (3), and the transverse groove (31) is enclosed inside the transverse guide rod (3); a positioning piece (32) is also provided on the transverse guide rod (3), the positioning piece (33) is a sheet-shaped structure, and a transverse limiting hole (33) is provided on the positioning piece (32).
2. A positioning guide for subtrochanteric osteotomy according to claim 1, characterized in that: The outer sleeve guide rod (1) and the curved guide rod (11) are an integral structure, the straight cut groove (12) and the curved cut groove (13) form a complete L-shaped channel, and the straight cut groove (12) is perpendicular to the plane where the curved cut groove (13) is located; The embedded guide rod (2) and the anti-bending rod (21) are also an integral structure; The longitudinal guide groove (22) and the reverse bending groove (23) form a connected complete L-shaped channel, and the longitudinal guide groove (22) is perpendicular to the plane where the reverse bending groove (23) is located; The planes where the reverse bending rod (21) and the bending guide rod (11) are located are parallel to each other, and the planes where the axes of the bending cutting groove (13) and the reverse bending groove (23) are located are also parallel to each other.
3. A positioning guide for subtrochanteric osteotomy according to claim 1, characterized in that: At least three positioning holes (4) are formed at the upper end of the outer sleeve guide rod (1); At least three positioning holes (4) are also provided at the lower end of the embedded guide rod (2); The axes of the outer sleeve guide rod (1) and the embedded guide rod (2) are on the same straight line as the connecting line of the plurality of positioning holes (4).
4. A positioning guide for subtrochanteric osteotomy according to claim 1, characterized in that: There are at least two transverse limiting holes (33), and the two transverse limiting holes (33) are symmetrically arranged on the positioning piece (32); The positioning sheet (33) is a flat sheet structure. The vertical axis of the positioning piece (33) coincides with the vertical axis of the transverse guide rod (3); The transverse guide rod (3) is an integral steel sheet that can be bent and deformed.