A lower limb standing force simulation device in HTO

Abstract

The present invention relates to the field of medical orthopedics, and particularly relates to a lower limb standing force simulation device in HTO, which includes a bottom plate. A bed plate is slidably arranged on the bottom plate. Straps and a power mechanism are fixedly arranged on the bed plate. A simulation mechanism is arranged on one side of the power mechanism. The simulation mechanism includes a stress plate fixedly arranged on the power mechanism. A hydraulic pump and a three-way pipe are fixedly arranged on the stress plate. By controlling the hydraulic pump of the present invention and then controlling the distance between the two pedals through the three-way pipe, the two force lines formed by connecting the hip joint center, knee joint center, and ankle joint center of the two legs are parallel to each other, so as to truly reflect the standing state of the patient. At the same time, the lower limb force state during the patient's walking can be simulated, and then the doctor can establish the gravity force line during the patient's walking through the three points of the hip joint center, knee joint center, and ankle joint center, and further observe to understand the wear and varus degree of the patient's knee joint.

Description

Technical Field

[0001] The present invention relates to the field of medical orthopedics, and particularly to a lower limb standing force simulation device in HTO. Background Art

[0002] HTO, also known as high tibial osteotomy, is mainly used for the orthopedic treatment of patients with lower limb varus deformity and osteoarthritis. It is mainly used for the increased medial wear of the knee joint, resulting in varus of the knee joint and abnormal force line. HTO spreads the medial side of the proximal tibia and expands it by a certain angle with a dilator in the middle, plus internal fixation, so that the force line returns to normal. Before this operation, a full-length lower limb CT scan is usually required. Generally, the hip joint center, knee joint center, and ankle joint center are selected. After connecting these three points into a straight line, the force line is established to observe and judge the degree of medial wear of the knee joint and the degree of varus of the knee joint. In order to make the coronal and sagittal positions of the affected limb after HTO recover more ideally, the CT scan scheme adopted before surgery can more accurately design the target angle. However, in the prior art, during CT detection, the patient can only lie flat on the CT table, so that during CT detection, the attending doctor cannot observe the wear and varus degree of the patient's knee joint when standing or walking, and thus cannot truly and effectively judge the patient's actual condition.

[0003] To solve the above problems, a lower limb standing force simulation device in HTO is proposed in the present invention. Summary of the Invention

[0004] (1) Technical Problems to be Solved

[0005] The purpose of the present invention is to overcome the problem that during CT examination of patients in high tibial osteotomy in the prior art, during the process of establishing the force line, the attending doctor cannot observe the wear and varus degree of the patient's knee joint during standing and walking. In the present invention, when the patient undergoes CT detection, a pressure equal to the patient's gravity is applied to the patient's lower limb to simulate the wear and varus degree of the patient's knee joint when standing. At the same time, by rotating the patient's own sole, the force on one leg is cancelled, and the gravity of the whole body is applied to one straight leg to simulate the force condition of one leg when the patient is walking, so that the attending doctor can comprehensively observe the varus and wear degrees of the patient's knee joint in different states.

[0006] (2) Technical Solutions

[0007] In order to achieve the purpose of the present invention, the technical solutions adopted by the present invention are as follows:

[0008] A lower limb standing force simulation device in HTO, including a bottom plate, on which a bed plate is slidably arranged, straps and a power mechanism are fixedly arranged on the bed plate, and a simulation mechanism is arranged on one side of the power mechanism;

[0009] The simulation mechanism includes a stress plate fixedly arranged on the power mechanism. A hydraulic pump and a three-way pipe are fixedly arranged on the stress plate. The three-way pipe is communicated with the hydraulic pump, and two groups of rotating components are symmetrically arranged on both sides of the three-way pipe.

[0010] The rotating component includes a sliding rod slidably connected to the three-way pipe. A turntable is fixedly arranged on the sliding rod. A connecting cover is rotatably arranged on the turntable, and a pedal is fixedly arranged on the connecting cover.

[0011] Preferably, the rotating component further includes a chute opened on the turntable. A slider is slidably arranged in the chute. The slider is fixedly connected to the connecting cover, and both sides of the slider are respectively connected to the inner wall of the chute through return springs.

[0012] Preferably, the rotating component further includes buffer components symmetrically arranged on the connecting cover. The buffer component includes a buffer cavity opened on the turntable. A piston is slidably arranged in the buffer cavity. The piston is connected to the buffer cavity through a buffer spring. The chute is communicated with the buffer cavity through a tapered hole.

[0013] Preferably, the buffer component further includes a support plate and a frustum. The support plate and the frustum are connected through a compression spring. The support plate is slidably connected to the tapered hole, and a through hole is arranged on the frustum.

[0014] Preferably, the power mechanism includes a placement plate fixedly arranged on the upper end surface of the bed board. A motor is fixedly arranged on the placement plate. A rotating shaft is fixedly arranged at the output shaft end of the motor. A first belt pulley is fixedly arranged on the rotating shaft. A power transmission shaft is rotatably arranged on the placement plate. A second belt pulley is fixedly arranged on the power transmission shaft. The second belt pulley and the first belt pulley are power-connected through a conveyor belt.

[0015] Preferably, a sleeve is threadedly connected to the other end of the power transmission shaft. An auxiliary hole is arranged in the sleeve. An auxiliary rod is slidably arranged in the auxiliary hole. The auxiliary rod is fixedly connected to the placement plate. A first pressure sensor is fixedly arranged on the sleeve.

[0016] Preferably, a placement cavity is arranged in the bed board. A bed board is slidably arranged in the placement cavity. The bed board is connected to the inner wall of the placement cavity through a plurality of stress springs.

[0017] Preferably, a second pressure sensor is fixedly arranged in the placement cavity. A controller is fixedly arranged on the placement plate. After the second pressure sensor detects a gravity signal, it transmits the signal to the controller. The controller controls the motor to rotate and controls the motor to stop rotating through the detection of the gravity signal by the first pressure sensor.

[0018] (3) Beneficial effects:

[0019] By controlling the hydraulic pump, and then controlling the distance between the two pedals through the three-way pipe, the two force lines formed by connecting the hip joint center, knee joint center, and ankle joint center of both legs are made parallel to each other, so as to truly reflect the standing state of the patient. At the same time, the lower limb force state during the patient's walking can be simulated, and then the attending doctor can establish the gravity force line during the patient's walking through the three points of the hip joint center, knee joint center, and ankle joint center. Further observation can help understand the wear and varus degree of the patient's knee joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic three-dimensional structure diagram of a lower limb standing force simulation device in a HTO of the present invention;

[0021] Figure 2 is a schematic three-dimensional structure diagram of the simulation mechanism of a lower limb standing force simulation device in a HTO of the present invention;

[0022] Figure 3 is an isometric sectional view of the three-way pipe of a lower limb standing force simulation device in a HTO of the present invention;

[0023] Figure 4 is an isometric sectional view of the turntable of a lower limb standing force simulation device in a HTO of the present invention;

[0024] Figure 5 is a Figure 4 magnified schematic diagram of part A in a lower limb standing force simulation device in a HTO of the present invention;

[0025] Figure 6 is a Figure 6 magnified schematic diagram of part B in a lower limb standing force simulation device in a HTO of the present invention;

[0026] Figure 7 is an isometric sectional view of the sleeve of a lower limb standing force simulation device in a HTO of the present invention;

[0027] Figure 8 is a partial exploded structure diagram of a lower limb standing force simulation device in a HTO of the present invention.

[0028] The reference numerals are as follows:

[0029] Bottom plate 1, placement cavity 10, stress spring 11, second pressure sensor 12, bed plate 13, strap 2, power mechanism 3, placement plate 30, motor 31, rotating shaft 310, first pulley 311, conveyor belt 312, power transmission shaft 32, second pulley 321, bearing 322, controller 33, sleeve 34, auxiliary rod 340, auxiliary hole 341, placement groove 342, simulation mechanism 4, stress plate 40, hydraulic pump 41, three-way pipe 42, sliding rod 43, turntable 45, chute 450, conical hole 4501, return spring 451, support plate 452, piston 453, buffer cavity 454, buffer spring 455, frustum 456, through hole 4560, compression spring 457, connection cover 46, connection shaft 461, slider 462, groove 463, pedal 47. Detailed implementation mode

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0031] Next, in combination with the attached Figure 1-8 And the embodiment further illustrates the present invention:

[0032] In this embodiment, as shown in Figure 1-3 A lower limb standing stress simulation device in HTO includes a bottom plate 1. A bed plate 13 is slidably arranged on the bottom plate 1. A strap 2 and a power mechanism 3 are fixedly arranged on the bed plate 13. A simulation mechanism 4 is arranged on one side of the power mechanism 3. When a patient undergoes a CT examination, the patient can lie flat on the bed plate 13. After fixing the patient's abdomen or chest cavity to the bed plate 13 through the strap 2, after starting the power mechanism 3, the simulation mechanism 4 applies pressure to the patient's lower limbs. At this time, when simulating the patient lying flat and undergoing a CT examination, the stress state of the patient's lower limbs when standing is simulated.

[0033] Furthermore, the simulation mechanism 4 includes a stress plate 40 fixedly arranged on the power mechanism 3. A hydraulic pump 41 and a three-way pipe 42 are fixedly arranged on the stress plate 40. The three-way pipe 42 is communicated with the hydraulic pump 41. Two groups of rotating components are symmetrically arranged on both sides of the three-way pipe 42. The patient's feet are respectively in contact with a rotating component. When the patient lies flat, the operator's legs are in a natural state. At this time, the hydraulic pump 41 can be controlled, and then the rotating components on both sides of the three-way pipe 42 can be controlled through the three-way pipe 42, so that the patient's legs swing to a certain extent, so that the three points of the hip joint center, knee joint center and ankle joint center of the legs are connected into a force line that is parallel to each other, so as to truly reflect the patient's standing state, and at the same time facilitate the attending doctor to compare and observe the damage and wear degree of the patient's knee joint.

[0034] Further, the rotating assembly includes a sliding rod 43 slidably connected to the three-way pipe 42. A turntable 45 is fixedly provided on the sliding rod 43. A connecting cover 46 is rotatably provided on the turntable 45. A pedal 47 is fixedly provided on the connecting cover 46. When the patient lies flat, both feet step on the two pedals 47 respectively. Then, the sliding rod 43 is controlled to move by the hydraulic pump 41 so that the force lines of the patient's legs are parallel. And when the power mechanism 3 acts on the patient's feet through the pedals 47 with the patient's own gravity, at this time, the stress state of the lower limbs when the patient stands can be simulated. Then, the patient can rotate and exert force on one ankle, and the other ankle abuts against the pedal 47. At this time, one foot of the patient can drive the pedal 47 and the connecting cover 46 to rotate around the turntable 45, so as to simulate the stress state of the lower limbs when the patient walks. Subsequently, the attending doctor can establish the gravity force line of the patient when walking through the three points of the hip joint center, knee joint center and ankle joint center. Further observation can help understand the wear and varus degree of the patient's knee joint.

[0035] First of all, it should be noted that during the CT examination of the patient in the high tibial osteotomy and the process of establishing the force line, the attending doctor cannot observe the wear and varus degree of the patient's knee joint during standing and walking, so that the stress state of the patient's lower limbs during standing and walking cannot be deeply understood.

[0036] However, in the present invention, by controlling the hydraulic pump 41, and then controlling the distance between the two pedals 47 through the three-way pipe 42, the two force lines formed by connecting the three points of the hip joint center, knee joint center and ankle joint center of the two legs are made parallel to each other, so as to truly reflect the state of the patient when standing. At the same time, by simulating the stress state of the lower limbs when the patient walks, the attending doctor can establish the gravity force line of the patient when walking through the three points of the hip joint center, knee joint center and ankle joint center. Further observation can help understand the wear and varus degree of the patient's knee joint.

[0037] In this embodiment, as shown in Figure 4-5 the rotating assembly further includes a chute 450 opened on the turntable 45. A slider 462 is slidably provided in the chute 450. The slider 462 is fixedly connected to the connecting cover 46. And both sides of the slider 462 are respectively connected to the inner wall of the chute 450 through return springs 451. Further, when the patient simulates the stress state of the lower limbs when walking, when the patient's ankle exerts force and swings forward or backward, at this time, the patient's foot drives the pedal 47 to rotate. The pedal 47 drives the slider 462 to rotate through the connecting cover 46. When the slider 462 rotates, one of the return springs 451 on both sides of the slider 462 is compressed and the other is stretched, so as to simulate the force state of the patient's feet when walking with both feet, and further enable the lower limbs to simulate the posture of the patient when walking.

[0038] In this embodiment, as shown in Figure 5As shown, the rotating assembly also includes a buffer component symmetrically arranged on the connecting cover 46, and the buffer component includes a buffer cavity 454 opened on the rotating disk 45, a piston 453 is slidably arranged in the buffer cavity 454, the piston 453 and the buffer cavity 454 are connected by a buffer spring 455, and the slide groove 450 is connected to the buffer cavity 454 through a tapered hole 4501. Preferably, a groove 463 is opened on the rotating disk 45, and a connecting shaft 461 is rotatably arranged in the groove 463. The connecting shaft 461 is fixedly connected to the connecting cover 46, and the slide groove 450 can be filled with hydraulic oil. The turntable 45 is rotatably sealed and connected to the connecting cover 46. When the patient simulates walking by exerting force through the ankle, the slider 462 slides in the slide groove 450, and the hydraulic oil on one side compressed in the connecting shaft 461 can flow into the buffer chamber 454 through the tapered hole 4501, and then the hydraulic oil compresses the piston 453 of a buffer component. At this time, the buffer spring 455 connected to the piston 453 is compressed and accumulates force. Then, when the patient's ankle is no longer exerting force, during the process of the elastic force of the buffer spring 455 recovering, the hydraulic oil in the buffer chamber 454 flows back to the slide groove 450.

[0039] In this embodiment, refer to Figure 5-6 As shown, the buffer component also includes a support plate 452 and a round table 456. The support plate 452 and the round table 456 are connected by a compression spring 457. The support plate 452 is slidably connected to the tapered hole 4501. A through hole 4560 is provided on the round table 456. When the patient's ankle exerts force and the sole of the foot leans forward, the patient's foot starting action when walking is simulated. The sole of the foot drives the connecting cover 46 to rotate through the pedal 47, and the connecting cover 46 drives the slider 462 to rotate. When the spring compression side in the slide 450 and the hydraulic oil flows into the buffer cavity 454 through the tapered hole 4501, the support plate 452 and the return spring 451 are slidably connected, so that the round table 456 compresses the compression spring 457. At this time, the gap between the round table 456 and the tapered hole 4501 becomes larger. At this time, the hydraulic oil in the slide 450 can quickly flow into the buffer cavity 454, and the patient's ankle is no longer exerting force. , when simulating the action of lifting one foot, during the recovery of the elastic forces of the return spring 451 and the buffer spring 455, the hydraulic oil in the buffer chamber 454 flows back into the slide groove 450 again, and the compression spring 457 is reset at this time, so that the gap between the truncated cone 456 and the conical hole 4501 is blocked, and the hydraulic oil can only flow back into the slide groove 450 through the through hole 4560. The elastic force recovery process of the return spring 451 and the buffer spring 455 is relatively slow, so that when the patient's ankle is not exerting force, the pedal 47 only applies a small part of the gravity to the patient, and this gravity is negligible compared to the patient's weight, so that when the patient simulates lifting one foot, the lifted foot is no longer under force in the present invention, and the force of the power mechanism 3 is fully transmitted to the other foot of the patient, so that the present invention can completely simulate the force state of one leg of the patient when walking.

[0040] In this embodiment, as shown in FIG. 1, the power mechanism 3 includes a mounting plate 30 fixedly arranged on the upper end surface of the bed board 13. A motor 31 is fixedly arranged on the mounting plate 30. The motor 31 is preferably a servo motor with an electromagnetic brake. A rotating shaft 310 is fixedly arranged at the output shaft end of the motor 31. A first pulley 311 is fixedly arranged on the rotating shaft 310. A power transmission shaft 32 is rotatably arranged on the mounting plate 30. A second pulley 321 is fixedly arranged on the power transmission shaft 32. The second pulley 321 is in power connection with the first pulley 311 through a conveyor belt 312. Preferably, a bearing 322 is embedded in the mounting plate 30, and the bearing 322 is rotatably connected with the power transmission shaft 32.

[0041] In this embodiment, as shown in Figure 7 FIG. 1, a sleeve 34 is threadedly connected to the other end of the power transmission shaft 32. An auxiliary hole 341 is arranged in the sleeve 34. An auxiliary rod 340 is slidably arranged in the auxiliary hole 341. The auxiliary rod 340 is fixedly connected with the mounting plate 30. A first pressure sensor 35 is fixedly arranged on the sleeve 34. Preferably, a part of the power transmission shaft 32 is a smooth shaft and another part is a lead screw. And an accommodation groove 342 is arranged in the sleeve 34. Threads are arranged in the accommodation groove 342. The threads in the sleeve 34 are threadedly connected with the lead screw on the power transmission shaft 32. When the motor 31 is started, it drives the rotating shaft 310 to rotate. The rotating shaft 310 drives the first pulley 311 to rotate. The first pulley 311 drives the 320 to rotate through the conveyor belt 312. The 320 drives the power transmission shaft 32 to rotate. After the power transmission shaft 32 rotates, the sleeve 34 starts to move forward. The sleeve 34 drives the first pressure sensor 35 to move forward. The sleeve 34 drives the simulation mechanism 4 to apply pressure to the patient. At this time, the first pressure sensor 35 can detect the pressure value applied by the simulation mechanism 4 to the patient.

[0042] In this embodiment, as shown in Figure 8 FIG. 1, an accommodation cavity 10 is arranged in the bed board 1. A bed board 13 is slidably arranged in the accommodation cavity 10. The bed board 13 is connected with the inner wall of the accommodation cavity 10 through a plurality of stress springs 11.

[0043] In this embodiment, as shown in Figure 8As shown, a second pressure sensor 12 is fixedly arranged in the placement cavity 10, and a controller 33 is fixedly arranged on the placement plate 30. After the second pressure sensor 12 detects the gravity signal, it transmits the signal to the controller 33. The controller 33 controls the motor 31 to rotate and controls the motor 31 to stop rotating by detecting the gravity signal of the first pressure sensor 35. Further, when the patient lies flat on the bed board 13, the bed board 13 compresses the stress spring 11. At this time, the second pressure sensor 12 is in low contact with the bed board 13. After the second pressure sensor 12 transmits the gravity of the patient to the controller 33, the controller 33 controls the power mechanism 3 to rotate, so that the power mechanism 3 drives the simulation mechanism 4 to apply the same magnitude of pressure to the patient. Then, the controller 33 cuts off the power supply of the motor 31 in time. After the motor 31 is powered off, the brake is engaged. At this time, the same force as the patient's own gravity can be applied to the patient's lower limbs, so as to simulate the real stress condition of the patient's leg joints when the patient undergoes a CT examination.

[0044] The embodiments disclosed in the present invention are preferred embodiments, but not limited thereto. Those of ordinary skill in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not depart from the spirit of the present invention, they are within the protection scope of the present invention.

Claims

1. A lower limb standing force simulation device in HTO, comprising a bottom plate (1), characterized in that: A bed board (13) is slidably arranged on the bottom board (1). Straps (2) and a power mechanism (3) are fixedly arranged on the bed board (13). A simulation mechanism (4) is arranged on one side of the power mechanism (3). The simulation mechanism (4) includes a stress plate (40) fixedly arranged on the power mechanism (3). A hydraulic pump (41) and a three-way pipe (42) are fixedly arranged on the stress plate (40). The three-way pipe (42) is communicated with the hydraulic pump (41). Two groups of rotating components are symmetrically arranged on both sides of the three-way pipe (42). The rotating component includes a sliding rod (43) slidably connected with the three-way pipe (42). A turntable (45) is fixedly arranged on the sliding rod (43). A connecting cover (46) is rotatably arranged on the turntable (45). A pedal (47) is fixedly arranged on the connecting cover (46). The rotating component further includes a chute (450) opened on the turntable (45). A slider (462) is slidably arranged in the chute (450). The slider (462) is fixedly connected with the connecting cover (46). Both sides of the slider (462) are respectively connected with the inner wall of the chute (450) through a return spring (451). The chute (450) is filled with hydraulic oil, so that the hydraulic oil compresses in the chute (450) to push the slider (462) to slide. The rotating component further includes buffer components symmetrically arranged on the connecting cover (46). The buffer component includes a buffer cavity (454) opened on the turntable (45). A piston (453) is slidably arranged in the buffer cavity (454). The piston (453) is connected with the buffer cavity (454) through a buffer spring (455). The chute (450) is communicated with the buffer cavity (454) through a tapered hole (4501). The buffer component further includes a support plate (452) and a frustum (456). The support plate (452) is connected with the frustum (456) through a compression spring (457). The support plate (452) is slidably connected with the tapered hole (4501). A through hole (4560) is arranged on the frustum (456). The power mechanism (3) includes a placement plate (30) fixedly arranged on the upper end surface of the bed board (13). A motor (31) is fixedly arranged on the placement plate (30). A power transmission shaft (32) is rotatably arranged on the placement plate (30). The other end of the power transmission shaft (32) is threadedly connected with a sleeve (34). A first pressure sensor (35) is fixedly arranged on the sleeve (34). A placement cavity (10) is arranged in the bottom board (1). A second pressure sensor (12) is fixedly arranged in the placement cavity (10). A controller (33) is fixedly arranged on the placement plate (30). After the second pressure sensor (12) detects a gravity signal, it transmits the signal to the controller (33). The controller (33) controls the motor (31) to rotate and controls the motor (31) to stop rotating through the detected gravity signal of the first pressure sensor (35).

2. The lower limb standing force simulation device in HTO according to claim 1, characterized in that : A rotating shaft (310) is fixedly provided at the output shaft end of the motor (31). A first pulley (311) is fixedly provided on the rotating shaft (310). A second pulley (321) is fixedly provided on the power transmission shaft (32). The second pulley (321) is in power connection with the first pulley (311) through a conveyor belt (312).

3. The lower limb standing force simulation device in HTO according to claim 1, wherein: An auxiliary hole (341) is provided in the sleeve (34). An auxiliary rod (340) is slidably provided in the auxiliary hole (341). The auxiliary rod (340) is fixedly connected to the placement plate (30).

4. A lower limb standing force simulation device in HTO according to claim 1, characterized in that: A bed plate (13) is slidably provided in the placement cavity (10). The bed plate (13) is connected to the inner wall of the placement cavity (10) through a plurality of stress springs (11).

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