Adjustable positioning module, knee joint replacement positioning platform and positioning method

Abstract

The invention discloses an adjustable positioning module, a knee joint replacement positioning platform and a knee joint replacement positioning method.The adjustable positioning module comprises a positioning table; the first supporting plate is used for supporting the upper body of the human body; the second supporting plate is used for supporting the legs of the human body, and the second supporting plate is in an inverted V shape; the third supporting plate is used for supporting the feet of the human body; the first supporting plate is obliquely and slidably arranged on the positioning table, a first driving mechanism used for driving the first supporting plate to obliquely and linearly slide relative to the positioning table is arranged on the positioning table, the second supporting plate is horizontally and linearly slidably connected to the positioning table, and the third supporting plate is slidably arranged on the positioning table. The positioning table is provided with a second driving mechanism used for driving the third supporting plate to vertically and horizontally slide linearly relative to the positioning table. The knee joint osteotomy device can be suitable for patients with different leg lengths, knee joint replacement surgery is facilitated, and the convenience and accuracy of osteotomy operation can be improved.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to an adjustable positioning module, a knee replacement positioning platform and a positioning method. Background Art

[0002] Knee replacement is a commonly used surgery for the treatment of knee diseases. It uses artificial prostheses to replace damaged articular cartilage to relieve joint pain, improve joint function, correct joint deformity and achieve long-term stability of the joint. During the operation, the patient is in a supine position, and a longitudinal incision is usually made in the anterior median of the knee, starting from 6-10 cm above the patella and going down to 1-2 cm below the tibial tubercle. The patella is dislocated laterally after being cut layer by layer, and the knee is then flexed to remove the anterior cruciate ligament of the meniscus and hyperplastic osteophytes to completely expose the knee joint. Subsequently, the tibial plateau is cut perpendicular to the long axis of the tibia, and the distal femur is cut with 6° valgus (osteotomy of the anterior and posterior femoral condyles and anterior and posterior oblique planes). Finally, a prosthesis of appropriate size is installed, and the incision is sutured layer by layer after the knee joint is reduced and flexion and extension activities indicate that the joint is stable.

[0003] Since knee replacement surgery needs to be performed with the affected limb in a flexed state, although conventional operating tables can use support pads to support the affected limb in a flexed state, the length of the thigh and calf of the affected limb of different patients may be different, and it is impossible to ensure that the support pad can provide good support for the affected limb (i.e., the thigh and calf of the affected limb can both fit on the support pad), thereby affecting the subsequent osteotomy positioning operation. At the same time, when the existing osteotomy is used to position the femur and tibia with an extramedullary positioning method, nailing is required for fixation, which not only has many operating procedures, but also when an operation error occurs, the marks left on the femur and tibia by the previous positioning operation will also limit the next positioning operation, increasing the difficulty of the operation. Summary of the invention

[0004] The purpose of the present invention is to provide an adjustable positioning module, a knee replacement positioning platform and a positioning method, which can be suitable for patients with different leg lengths, facilitate the performance of knee replacement surgery, and improve the convenience and accuracy of osteotomy operations.

[0005] The technical solution adopted by the present invention to solve the above problems is:

[0006] An adjustable positioning module, comprising:

[0007] Positioning table;

[0008] A first support plate, which is used to support the upper body of a human body;

[0009] A second support plate, which is used to support the legs of a human body, and the second support plate is in an inverted V shape;

[0010] The third support plate, which is used to support the foot of the human body;

[0011] Wherein, the first support plate, the second support plate and the third support plate are arranged in a straight line on the positioning table in sequence. The first support plate is slidably arranged obliquely on the positioning table. A first driving mechanism for driving the first support plate to slide obliquely and linearly relative to the positioning table is provided on the positioning table. The sliding direction of the first support plate is parallel to the inclination direction of the left section of the second support plate. The second support plate is slidably connected to the positioning table horizontally and linearly. Positioning plates parallel to it are provided on both the left section and the right section of the second support plate. The connection between the positioning plate and the second support plate is realized through a connecting plate. The connecting plate is in an inverted L shape and both its horizontal section and vertical section are telescopic structures. One end of the connecting plate is fixedly connected to the second support plate and the other end is rotatably connected to the positioning plate in a damped manner. A positioning hole is penetrated on the positioning plate. Two infrared transmitters are slidably and rotatably connected to the positioning plate. The two infrared transmitters are symmetrically arranged left and right relative to the positioning hole. A positioning seat is slidably connected in the positioning hole. The positioning seat is a telescopic structure and is penetrated with a through hole for the tool head of the ultrasonic bone cutter to pass through. Both ends of the positioning seat are rotatably connected to the two infrared transmitters respectively. The rotation direction of the positioning seat relative to the infrared transmitter is perpendicular to the direction in which the tool head passes through the through hole. The third support plate is slidably arranged on the positioning table. A second driving mechanism for driving the third support plate to slide vertically and horizontally linearly relative to the positioning table is provided on the positioning table. The horizontal sliding direction of the third support plate is perpendicular to the horizontal sliding direction of the second support plate.

[0012] As a further improvement of the above technical solution, the first driving mechanism includes a first lifting platform. The first support plate is horizontally slidably connected to the top surface of the lifting platform through rollers. A plurality of inclined guide grooves are provided on the positioning table. The first support plate is provided with bumps corresponding to the guide grooves one by one. The bumps are slidably connected in the corresponding guide grooves. The first lifting platform is vertically slidably arranged on the positioning table. A first linear driving device for driving the first lifting platform to move vertically relative to the positioning table is installed on the positioning table.

[0013] As a further improvement of the above technical solution, a telescopic rod is provided on the positioning plate. The telescopic direction of the telescopic rod is parallel to the positioning plate.

[0014] As a further improvement of the above technical solution, a sliding seat is slidably arranged on the positioning table and a second linear driving device for driving the sliding seat to slide horizontally relative to the positioning table is provided. The sliding direction of the sliding seat is perpendicular to the sliding direction of the second support plate. Guide rods are provided on both the sliding seat and the positioning table and the two guide rods are arranged in parallel. The outer ends of the left section and the right section are respectively sleeved on the two guide rods. The inner ends of the left section and the right section are hinged to each other. When the distance between the two guide rods is the shortest, the sliding direction of the first support plate is parallel to the inclination direction of the left section.

[0015] As a further improvement of the above technical solution, a limiting block for abutting against the foot is horizontally and linearly slidably connected to the third support plate. The side surface of the limiting block in contact with the foot is inclined, and the inclination direction thereof is perpendicular to the inclination direction of the right section of the second support portion.

[0016] As a further improvement of the above technical solution, the second driving mechanism includes a second lifting platform. The third support plate is horizontally slidably disposed on the top surface of the second lifting platform. A third linear driving device for driving the third support plate to horizontally slide relative to the second lifting platform is provided on the second lifting platform. The second lifting platform is vertically slidably disposed on the positioning platform, and a fourth linear driving device for driving the second lifting platform to vertically move relative to the positioning platform is installed on the positioning platform.

[0017] As a further improvement of the above technical solution, restraint straps for fixing the legs thereto are provided on both the left section and the right section.

[0018] The present invention also provides a knee joint replacement positioning platform, including:

[0019] A bed body, on which the adjustable positioning module described in any one of the above technical solutions is provided;

[0020] A lifting base for supporting the bed body.

[0021] The present invention also provides a positioning method based on the knee joint replacement positioning platform described in the above technical solution, including:

[0022] Step 1: The patient lies on the bed body. At this time, the patient's buttocks are located at a specific position on the first support plate, and at the same time, the thigh of the affected limb is attached to and placed on the left section.

[0023] Step 2: Drive the first support plate to obliquely slide relative to the positioning platform through the first driving mechanism, so that the position of the knee joint on the affected limb is located at the connection between the left section and the right section. Subsequently, drive the third support plate to vertically and horizontally slide relative to the positioning platform through the second driving mechanism, so that the right section abuts against and supports the calf of the affected limb and the third support plate abuts against and supports the foot of the affected limb.

[0024] Step 3: Rotate the positioning plate relative to the second support plate according to the axial directions of the femur and tibia in the affected limb, and extend and retract the connecting plate along its transverse section, so that the distal end of the femur and the tibial plateau are respectively opposite to the positioning holes of the two positioning plates. Subsequently, extend and retract the connecting plate along its longitudinal section to adjust the distance between the positioning plate and the leg.

[0025] Step 4: Move the infrared emitter, determine both ends of the osteotomy trajectory through the irradiation points of the two infrared emitters, and at the same time, extend and retract the positioning seat to determine the osteotomy trajectory.

[0026] Step Five: Rotate the infrared emitter relative to the positioning plate to adjust the osteotomy angle.

[0027] As a further improvement of the above technical solution, in the second step, during the process of moving the position of the knee joint on the affected limb to the connection between the left section and the right section, the thigh of the affected limb always fits on the left section.

[0028] Compared with the prior art, the present invention has the following advantages and effects:

[0029] (1) Through the supporting effect of the second support plate on the knee joint of the affected limb and combined with the adjustable effects of the first support plate and the second support plate, the device can be applied to patients with different leg lengths, ensuring the naturalness and comfort of the patient's supine posture. Thus, while facilitating the knee replacement surgery, the applicable range of the device is also improved.

[0030] (2) Through the structural arrangement of the positioning plate on the second support plate, the movement restriction of the subsequent ultrasonic bone knife head is completed while determining the osteotomy trajectory, improving the convenience of the osteotomy operation and ensuring the accuracy of the osteotomy. At the same time, due to the rotational setting of the infrared emitter and the positioning seat on the positioning plate, the positioning plate used for tibial positioning osteotomy can also be used for femoral positioning osteotomy, making the operation more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic structural diagram of a knee replacement positioning platform of the present invention.

[0032] Figure 2 is a schematic structural diagram of Part One of the knee replacement positioning platform of the present invention.

[0033] Figure 3 is Figure 2 an enlarged schematic structural diagram of the positioning plate shown in

[0034] Figure 4 is Figure 1 a schematic cross-sectional view of Part One of the positioning table shown in

[0035] Figure 5 is a schematic structural diagram of Part Two of the knee replacement positioning platform of the present invention.

[0036] Figure 6 is Figure 2 a schematic cross-sectional view of Part Two of the positioning table shown in

[0037] Figure 7 is Figure 2 a schematic cross-sectional view of Part Three of the positioning table shown in

[0038] Figure 8 It is a schematic structural diagram of Part Three of a knee joint replacement positioning platform according to the present invention.

[0039] Figure 9 is Figure 8 a schematic sectional view of the structure of Part Four of the positioning table shown in

[0040] Figure 10 is Figure 8 a schematic sectional view of the structure of Part Five of the positioning table shown in

[0041] Among them, there are a bed body 11, a lifting base 12, an adjustable positioning module 2, a positioning table 21, a first support plate 22, a second support plate 23, a third support plate 24, a first driving mechanism 25, a second driving mechanism 26, a left section 31, a right section 32, a restraint strap 33, a positioning plate 4, a positioning hole 41, an infrared emitter 42, a positioning seat 43, a through hole 44, a telescopic rod 45, a connecting plate 5, a transverse section 51, a longitudinal section 52, a first lifting platform 61, a roller 62, a guide groove 63, a convex block 64, a first linear driving device 65, a sliding seat 71, a second linear driving device 72, a guide rod 73, a support pad 74, a limiting block 8, an inclined surface 81, a second lifting platform 91, a third linear driving device 92, and a fourth linear driving device 93. Specific Embodiment

[0042] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, and the present invention is not limited to the following embodiments.

[0043] Refer to Figures 1 - 10, A knee joint replacement positioning platform in this embodiment includes a bed body 11 and a lifting base 12 for supporting the bed body 11. An adjustable positioning module 2 is provided on the bed body 11. The adjustable positioning module 2 includes a positioning table 21, a first support plate 22 for supporting the upper body of a human body, a second support plate 23 for supporting the leg of a human body, and a third support plate 24 for supporting the foot of a human body. The first support plate 22, the second support plate 23, and the third support plate 24 are arranged in a straight line on the positioning table 21 in sequence. The first support plate 22 is slidably arranged obliquely on the positioning table 21. A first driving mechanism 25 is provided on the positioning table 21 for driving the first support plate 22 to slide obliquely and linearly relative to the positioning table 21. The sliding direction of the first support plate 22 is parallel to the inclination direction of the left section 31 of the second support plate 23. The second support plate 23 is in an inverted V shape and is horizontally and linearly slidably connected to the positioning table 21. Positioning plates 4 are provided on both the left section 31 and the right section 32 of the second support plate 23 and are arranged parallel to it. The positioning plate 4 and the second support plate 23 are connected by a connecting plate 5. The connecting plate 5 is in an inverted L shape and both its horizontal section 51 and vertical section 52 are telescopic structures. One end of the connecting plate 5 is fixedly connected to the second support plate 23 and the other end is rotatably connected to the positioning plate 4 in a damped manner. A positioning hole 41 is penetrated through the positioning plate 4. Two infrared emitters 42 are slidably and rotatably connected to the positioning plate 4. The two infrared emitters 42 are symmetrically arranged left and right relative to the positioning hole 41. A positioning seat 43 is slidably connected in the positioning hole 41. The positioning seat 43 is a telescopic structure and a through hole 44 for the cutter head of an ultrasonic osteotome to pass through is penetrated through it. Both ends of the positioning seat 43 are rotatably connected to the two infrared emitters respectively. The rotation direction of the positioning seat 43 relative to the infrared emitter is perpendicular to the direction in which the cutter head passes through the through hole 44. The third support plate 24 is slidably arranged on the positioning table 21. A second driving mechanism 26 is provided on the positioning table 21 for driving the third support plate 24 to slide vertically and horizontally linearly relative to the positioning table 21. The horizontal sliding direction of the third support plate 24 is perpendicular to the horizontal sliding direction of the second support plate 23.

[0044] During use, the patient lies on the bed body 11. At this time, the patient's buttocks are located at a specific position on the first support plate 22. At the same time, the thigh of the affected limb is attached and placed on the left section 31. Then, the first driving mechanism 25 is used to drive the first support plate 22 to slide obliquely relative to the positioning table 21, so that the position of the knee joint on the affected limb can be moved to the connection between the left section 31 and the right section 32. And during this process, the thigh of the affected limb always remains attached to the left section 31. Then, the second driving mechanism 26 is used to drive the third support plate 24 to slide vertically and horizontally relative to the positioning table 21, so that the right section 32 is attached to and supports the calf of the affected limb and the third support plate 24 abuts against and supports the foot of the affected limb, thereby completing the placement of the affected limb on the second support plate 23, making the device applicable to patients with different lengths of affected limbs and improving the applicable range of the device.

[0045] When performing osteotomy positioning, according to the axial directions of the femur and tibia of the affected limb, rotate the positioning plate 4 relative to the second support plate 23, and extend and retract the connecting plate 5 along its transverse section 51 so that the distal end of the femur and the tibial plateau can respectively face the positioning holes 41 of the two positioning plates 4. Then extend and retract the connecting plate 5 along its longitudinal section 52 to adjust the distance between the positioning plate 4 and the leg. Then move the infrared emitter 42, and determine both ends of the osteotomy trajectory through the irradiation points of the two infrared emitters 42. At the same time, the positioning seat 43 extends and retracts to determine the osteotomy trajectory. Subsequently, rotate the infrared emitter 42 relative to the positioning plate 4 so that the infrared emitter 42 drives the positioning seat 43 to rotate, thereby adjusting the osteotomy angle.

[0046] See Figure 2 , on both the left section 31 and the right section 32, there are restraint belts 33 for fixing the leg thereto, which improves the stability of the affected limb in the position state of the second support plate 23. In this embodiment, the restraint belt 33 includes a left belt body and a right belt body. The outer ends of the left belt body and the right belt body are fixedly connected to the second support plate 23, and the inner ends of the two are connected by a magic tape.

[0047] See Figure 3 , on the positioning plate 4, there is a telescopic rod 45, and the telescopic direction of the telescopic rod 45 is parallel to the positioning plate 4, which facilitates determining the axial direction via the positions of both ends of the femur and tibia, and ensures the convenience and accuracy of rotating the positioning plate 4 relative to the second support plate 23.

[0048] See Figure 4 , Figure 5 , the first driving mechanism 25 includes a first lifting platform 61. The first support plate 22 is horizontally slidably connected to the top surface of the lifting platform through rollers 62. A plurality of inclined guide grooves 63 are formed on the positioning platform 21. On the first support plate 22, there are convex blocks 64 corresponding to the guide grooves 63 one by one. The convex blocks 64 are slidably connected in the corresponding guide grooves 63. The first lifting platform 61 is vertically slidably arranged on the positioning platform 21. A first linear driving device 65 for driving the first lifting platform 61 to move vertically relative to the positioning platform 21 is installed on the positioning platform 21. When the first linear driving device 65 drives the first lifting platform 61 to move vertically, due to the cooperation of the convex blocks 64 and the guide grooves 63, the first support plate 22 can move obliquely under the push of the first lifting platform 61, so as to achieve the effect of moving the knee joint of the affected limb to the connection between the left section 31 and the right section 32 on the basis of continuously supporting the thigh on the left section 31, reducing the limitation of the length of the thigh on the use of the device, and enabling the device to be applicable to patients with different thigh lengths.

[0049] In this embodiment, the first linear driving device 65 is a screw motor. An extension part is integrally connected to the bottom surface of the first lifting platform 61. The extension part is slidably connected to the positioning platform 21 and is sleeved on the output shaft of the screw motor in a threaded fit manner.

[0050] Refer to Figures 5 - 7 , a sliding seat 71 is slidably arranged on the positioning platform 21, and a second linear driving device 72 for driving the sliding seat 71 to slide horizontally relative to the positioning platform 21 is provided. The sliding direction of the sliding seat 71 is perpendicular to the sliding direction of the second support plate 23. Guide rods 73 are provided on both the sliding seat 71 and the positioning platform 21, and the two guide rods 73 are arranged in parallel. The outer ends of the left section 31 and the right section 32 are respectively sleeved on the two guide rods 73, and the inner ends of the left section 31 and the right section 32 are hinged to each other, so that the left section 31 and the right section 32 arranged at an angle can be in the same plane, achieving the effect of retracting the second support plate 23, thereby reducing the packaging volume of the device to reduce the transportation cost. When the distance between the two guide rods 73 is the shortest, the sliding direction of the first support plate 22 is parallel to the inclination direction of the left section 31.

[0051] In this embodiment, the second linear driving device 72 is an electric push rod, and the push block of the electric push rod is fixedly connected to the inner end of the sliding seat 71.

[0052] In this embodiment, a support pad 74 for supporting the leg is provided on the positioning platform 21. The top surface of the support pad 74 is flat, and the support pad 74 can be erected on the two guide rods 73 to reduce the discomfort of the guide rods 73 supporting the leg.

[0053] Refer to Figure 8 , a limiting block 8 for abutting against the foot is horizontally linearly slidably connected to the third support plate 24. The sliding direction of the limiting block 8 is parallel to the sliding direction of the second support plate 23, so that the device can be applicable to the use of single knee joint replacement surgery for the left and right lower limbs. The side surface of the limiting block 8 in contact with the foot is beveled 81, and its inclination direction is perpendicular to the inclination direction of the right section 32 of the second support part, ensuring the stability and comfort of the foot resting on the third support plate 24 and reducing the risk of affecting the surgical operation due to the change of the leg position caused by the displacement of the foot.

[0054] Refer to Figure 9 、 Figure 10, the second driving mechanism 26 includes a second lifting platform 91. The third support plate 24 is horizontally slidably arranged on the top surface of the second lifting platform 91. A third linear driving device 92 for driving the third support plate 24 to horizontally slide relative to the second lifting platform 91 is provided on the second lifting platform 91. The second lifting platform 91 is vertically slidably arranged on the positioning platform 21. A fourth linear driving device 93 for driving the second lifting platform 91 to vertically move relative to the positioning platform 21 is installed on the positioning platform 21. Through the driving effect of driving the third support plate 24 to horizontally slide by the third linear driving device 92 and the driving effect of driving the second lifting platform 91 to vertically slide by the fourth linear driving device 93, the third support plate 24 can support the foot while the right section 32 fits and supports the calf of the affected limb, ensuring the stability of the placement state of the affected limb on the second support plate 23.

[0055] In this embodiment, the third linear driving device 92 is an electric push rod. The push block of the electric push rod is fixedly connected to the third support plate 24. The fourth linear driving device 93 is two screw motors. The two screw motors are symmetrically arranged left and right relative to the second lifting platform 91. Both ends of the second lifting platform 91 are respectively sleeved on the output shafts of the two screw motors in a threaded fit manner.

[0056] What is described above in this specification is only an example of the present invention. Those skilled in the technical field to which the present invention pertains can make various modifications or supplements to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the content of this specification of the present invention or exceed the scope defined by this claims, they should fall within the protection scope of the present invention.

Claims

1. An adjustable positioning module, characterized in that: include: Positioning table; A first support plate, which is used to support the upper body of a human body; A second support plate, which is used to support the legs of a human body, and the second support plate is in an inverted V shape; A third support plate, used for supporting the foot of a human body; The first support plate, the second support plate and the third support plate are sequentially arranged in a straight line on the positioning platform, the first support plate is obliquely slidably arranged on the positioning platform, and a first driving mechanism is provided on the positioning platform for driving the first support plate to slide obliquely and linearly relative to the positioning platform, the sliding direction of the first support plate is parallel to the inclination direction of the left section of the second support plate, the second support plate is horizontally and linearly slidably connected to the positioning platform, the left section and the right section of the second support plate are both provided with positioning plates arranged parallel thereto, the positioning plate and the second support plate are connected by a connecting plate, the connecting plate is in an inverted L shape, and its transverse section and longitudinal section are both retractable structures, one end of the connecting plate is fixedly connected to the second support plate and the other end thereof is connected to the second support plate for damping rotation. A positioning plate is provided with a positioning hole, and two infrared emitters are connected to the positioning plate in a damping sliding and rotatable manner. The two infrared emitters are symmetrically arranged relative to the positioning holes. A positioning seat is slidably connected in the positioning hole. The positioning seat is a retractable structure and is provided with a through hole for the blade of the ultrasonic bone knife to pass through. The two ends of the positioning seat are rotatably connected to the two infrared emitters respectively, and the rotation direction of the positioning seat relative to the infrared emitter is perpendicular to the direction in which the blade passes through the through hole. The third support plate is slidably arranged on the positioning platform, and the positioning platform is provided with a second driving mechanism for driving the third support plate to slide vertically and horizontally relative to the positioning platform. The horizontal sliding direction of the third support plate is perpendicular to the horizontal sliding direction of the second support plate.

2. The adjustable positioning module according to claim 1, characterized in that: The first driving mechanism includes a first lifting platform, a first support plate is horizontally slidably connected to the top surface of the lifting platform through rollers, a plurality of inclined guide grooves are provided on the positioning platform, and protrusions corresponding to the guide grooves are provided on the first support plate. The protrusions are slidably connected to the corresponding guide grooves. The first lifting platform is vertically slidably arranged on the positioning platform, and a first linear driving device for driving the first lifting platform to move vertically relative to the positioning platform is installed on the positioning platform.

3. The adjustable positioning module according to claim 1, characterized in that: The positioning plate is provided with a telescopic rod, and the telescopic direction of the telescopic rod is parallel to the positioning plate.

4. The adjustable positioning module according to claim 1, characterized in that: The positioning platform is slidably provided with a sliding seat and a second linear drive device for driving the sliding seat to slide horizontally relative to the positioning platform. The sliding direction of the sliding seat is perpendicular to the sliding direction of the second support plate. The sliding seat and the positioning platform are both provided with guide rods and the two guide rods are arranged in parallel. The outer ends of the left section and the right section are respectively sleeved on the two guide rods, and the inner ends of the left section and the right section are hinged. When the distance between the two guide rods is the shortest, the sliding direction of the first support plate is parallel to the inclination direction of the left section.

5. The adjustable positioning module according to claim 1, characterized in that: The third support plate is horizontally and linearly slidably connected with a limit block for supporting the foot, and the side surface of the limit block in contact with the foot is inclined and its inclination direction is perpendicular to the inclination direction of the right section of the second support part.

6. The adjustable positioning module according to claim 1, characterized in that: The second driving mechanism includes a second lifting platform, a third support plate is horizontally slidably arranged on the top surface of the second lifting platform, the second lifting platform is provided with a third linear driving device for driving the third support plate to slide horizontally relative to the second lifting platform, the second lifting platform is vertically slidably arranged on the positioning platform, and the positioning platform is installed with a fourth linear driving device for driving the second lifting platform to move vertically relative to the positioning platform.

7. The adjustable positioning module according to claim 1, characterized in that: The left section and the right section are both provided with binding belts for fixing the legs thereon.

8. A knee replacement positioning platform, characterized in that: include: A bed body, on which is provided an adjustable positioning module as claimed in any one of claims 1 to 7; The lifting base is used to support the bed.

9. A positioning method based on the knee replacement positioning platform of claim 8, characterized in that: include: Step 1: The patient lies on the bed, with the patient's buttocks located at a specific position of the first support board, and the thigh of the affected limb is attached to and placed on the left section; Step 2: The first support plate is driven by the first driving mechanism to slide obliquely relative to the positioning platform, so that the position of the knee joint on the affected limb is located at the connection between the left section and the right section, and then the third support plate is driven by the second driving mechanism to slide vertically and horizontally relative to the positioning platform, so that the right section is attached to and supports the calf of the affected limb and the third support plate is against and supports the foot of the affected limb; Step 3: According to the axial direction of the femur and tibia in the affected limb, the positioning plate is rotated relative to the second support plate, and the connecting plate is extended and retracted along its transverse section so that the distal end of the femur and the tibial plateau are respectively opposite to the positioning holes of the two positioning plates, and then the connecting plate is extended and retracted along its longitudinal section to adjust the distance between the positioning plate and the leg; Step 4: Move the infrared transmitter to determine the two ends of the osteotomy trajectory through the irradiation points of the two infrared transmitters, and at the same time, the positioning seat is extended and retracted to determine the osteotomy trajectory; Step 5: Rotate the infrared transmitter relative to the positioning plate to adjust the osteotomy angle.

10. The positioning method of the knee replacement positioning platform according to claim 9, characterized in that: In step 2, while the position of the knee joint on the affected limb moves toward the connection between the left section and the right section, the thigh of the affected limb always fits on the left section.

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