Knee joint axial image examination fixing device

Abstract

The utility model relates to a knee joint axial position image examination fixing device, relates to the technical field of medical instruments, and is used for solving the problems that quadriceps femoris is pressed, the angle of the knee joint is difficult to keep, and the quadriceps femoris cannot be respectively in a relaxed state and a tensioned state when the knee joint is subjected to image examination in the prior art. The knee joint axial position image examination fixing device comprises a thigh fixing assembly, a supporting plate, a bottom plate assembly, a shank fixing assembly and a load limiting assembly, the thigh fixing assembly is connected with the bottom plate assembly through the supporting plate, the shank fixing assembly is connected with the thigh fixing assembly, and the load limiting assembly is connected with the thigh fixing assembly. The load limiting assembly is connected with the shank fixing assembly. The thigh and the shank of a patient can be fixed, quadriceps femoris muscles can be in a tension state and a relaxed state respectively under the condition that the angle is not changed when knee joints are fixed at the same angle, and axial radiography is carried out on the patella.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a fixation device for axial imaging examination of the knee joint. Background Technology

[0002] The knee joint is composed of bony structures such as the lower end of the femur, the upper end of the tibia, and the patella, as well as soft tissue structures such as the meniscus, cruciate ligaments, and collateral ligaments. Axial X-ray imaging of the knee joint is widely used in the diagnosis of patellofemoral joint diseases due to its advantages of being simple to perform, quick to take, and inexpensive. It is of high value in the evaluation of patellofemoral instability, patellofemoral osteoarthritis, patellar fracture, and post-knee replacement surgery.

[0003] Currently in clinical practice, patients are required to lie prone during knee axial imaging. This position causes compression of the quadriceps femoris muscle and makes it difficult to maintain the knee joint angle. When performing imaging examinations on the knee joint, it is impossible to allow the quadriceps femoris muscle to be in both relaxed and tense states, thus making it impossible to compare the position of the patella in the relaxed and tense states of the quadriceps femoris muscle. Utility Model Content

[0004] Based on the above analysis, the present invention aims to provide a fixation device for axial imaging examination of the knee joint, in order to solve the problems in the prior art that cause compression of the quadriceps femoris muscle and difficulty in maintaining the knee joint angle during imaging examination of the knee joint, and the inability to allow the quadriceps femoris muscle to be in a relaxed and tense state respectively.

[0005] The objective of this utility model is mainly achieved through the following technical solutions:

[0006] A fixation device for axial imaging examination of the knee joint includes a thigh fixation component, a support plate, a base plate component, a lower leg fixation component, and a weight-bearing limiting component. The thigh fixation component is connected to the base plate component via the support plate. The lower leg fixation component is connected to the thigh fixation component. The weight-bearing limiting component is connected to the lower leg fixation component. The weight-bearing limiting component can place heavy objects to maintain the tension of the quadriceps muscle.

[0007] The load-bearing limiting component includes an adjusting rod and a limiting rod. The adjusting rod is connected to the lower leg fixing component, and the limiting rod is connected to the adjusting rod. The limiting rod can apply pressure to the lower leg.

[0008] Furthermore, the lower leg fixing assembly includes an inner lower leg fixing plate and an outer lower leg fixing plate, and the load-bearing limiting assembly also includes an adjustment knob;

[0009] The lower leg fixing outer plate has a hollow structure, and the lower leg fixing inner plate is disposed in the hollow of the lower leg fixing outer plate. A connecting rod is provided on the lower leg fixing inner plate, and the adjusting rod is connected to the connecting rod through the adjusting knob. The adjusting knob passes through the adjusting rod and is connected to the connecting rod.

[0010] Furthermore, the adjustment knob includes a rotating head and an inner connecting shaft, the rotating head having a hollow structure, and the inner connecting shaft being disposed inside the rotating head;

[0011] The inner connecting shaft includes an inner connecting head, a second spring, a rotating shaft section, and a threaded connecting section. The inner connecting head is connected to the rotating head through a bearing seat, and the rotating shaft section is connected to the inner connecting head through the second spring.

[0012] Furthermore, the connecting rod is provided with an adjusting groove and a limiting block, the limiting block is disposed in the adjusting groove, and the threaded connection section passes through the adjusting groove and is connected to the connecting rod.

[0013] Furthermore, the adjusting rod is provided with an adjusting connecting section, which is located within the adjusting groove. The adjusting connecting section has a threaded hole, and the diameter of the rotating shaft section is smaller than the diameter of the threaded hole on the adjusting connecting section. The rotating shaft section passes through the threaded hole on the adjusting connecting section, and the adjusting connecting section can rotate within the adjusting groove around the rotating shaft section as an axis. The rotating head can enter the threaded hole on the adjusting connecting section and be threadedly connected to the adjusting connecting section.

[0014] Furthermore, a fixing head and a first spring are provided on the inner plate of the lower leg fixing. The fixing head is connected to the inner plate of the lower leg fixing through the first spring. A fixing hole is provided on the outer plate of the lower leg fixing. The fixing head can pass through the fixing hole to fix the position of the outer plate of the lower leg fixing.

[0015] The end of the limiting rod can be used to hang heavy objects.

[0016] Furthermore, the base plate assembly includes a base plate and an angle adjustment component. An adjustment groove is provided on the lower leg fixing outer plate, and the angle adjustment component passes through the adjustment groove and connects to the lower leg fixing inner plate.

[0017] Furthermore, the thigh fixation assembly includes a thigh support plate, a thigh fixation plate, and a thigh fixation strap. The thigh support plate is connected to the support plate, the thigh fixation plate is connected to the thigh support plate, the thigh fixation strap is disposed on the thigh fixation plate, and the lower leg fixation inner plate is connected to the thigh support plate.

[0018] Furthermore, a first sliding groove is provided on the thigh support plate, and a pin hole is provided in the first sliding groove; a first slider is provided on the thigh fixing plate, and the first slider can move along the first sliding groove.

[0019] Furthermore, the calf fixation assembly also includes a calf fixation strap, a second sliding groove is provided on the calf fixation outer plate, and a second slider is provided on the calf fixation strap, the second slider being able to move along the second sliding groove.

[0020] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0021] (1) The knee joint axial imaging examination fixation device of this utility model, by setting a weight-bearing limiting component, allows the patient to push the limiting rod with the lower leg to make the quadriceps muscle in a tense state. By setting an adjustment knob, the angle between the limiting rod and the lower leg fixing outer plate can be changed and the position of the limiting rod can be fixed. Thus, when the knee joint is fixed at the same angle, the quadriceps muscle can be in a tense state and a relaxed state respectively without changing the angle, and the position of the patella can be taken in an axial view.

[0022] (2) By setting the lower leg fixation outer plate and the lower leg fixation inner plate, the length of the lower leg fixation assembly can be increased by moving the lower leg fixation outer plate along the lower leg fixation inner plate, which is convenient for adjustment according to the patient's height.

[0023] (3) By setting an adjustment knob, adjustment rod, limit rod and connecting rod, the angle between the limit rod and the lower leg fixation plate can be adjusted and fixed, and the adjustment rod can be restricted to rotate by the limit block to prevent the patient's lower leg from bending too much and causing injury.

[0024] (4) By setting a first slider and a fixing pin that can move along the first groove on the thigh fixation plate, and setting a second slider that can move along the second groove on the calf fixation belt, as well as bolts, gears and racks, the thigh fixation plate and calf fixation belt can be adjusted according to the patient's body size, thereby increasing the fixation effect and the patient's comfort.

[0025] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages will become apparent from the description or be learned by practicing this invention. The objectives and other advantages of this invention can be realized and obtained from the details specifically pointed out in the text and accompanying drawings. Attached Figure Description

[0026] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0027] Figure 1 This is a schematic diagram of the overall structure of the knee joint axial imaging examination fixation device according to Embodiment 1 of this utility model;

[0028] Figure 2 This is a partial structural diagram of the lower leg fixing inner plate and lower leg fixing outer plate of Embodiment 1 of this utility model;

[0029] Figure 3 This is a partial structural diagram of the connection between the angle adjustment component and the lower leg fixing inner plate in Embodiment 1 of this utility model;

[0030] Figure 4 This is a schematic diagram of the cross-sectional structure of the connection between the inner and outer plates of the lower leg fixing system in Embodiment 1 of this utility model.

[0031] Figure 5 This is a partial structural diagram of the connection between the connecting rod and the adjusting rod in Embodiment 1 of this utility model;

[0032] Figure 6 This is a longitudinal cross-sectional structural diagram of the connection between the connecting rod and the adjusting rod in Embodiment 1 of this utility model;

[0033] Figure 7 This is a schematic diagram of the adjustment knob in Embodiment 1 of this utility model;

[0034] Figure 8 This is a schematic diagram of the inner connecting shaft in Embodiment 1 of this utility model;

[0035] Figure 9 This is a partial structural diagram of the first slider and the first groove in Embodiment 2 of this utility model;

[0036] Figure 10 This is a partial structural diagram of the second slider and the second groove in Embodiment 2 of this utility model;

[0037] Figure 11 This is a schematic diagram of the internal structure of the second slider in Embodiment 2 of this utility model.

[0038] Figure label:

[0039] 1-Thigh fixation assembly; 11-Thigh support plate; 111-First slide groove; 1111-Pin hole; 12-Thigh fixation plate; 121-First slider; 122-Fixing pin; 13-Thigh fixation strap; 2-Support plate; 3-Base plate assembly; 31-Base plate; 32-Angle adjustment component; 4-Lower leg fixation assembly; 41-Lower leg fixation inner plate; 411-Fixing head; 412-First spring; 413-Connecting rod; 4131-Adjusting slide groove; 4132-Limiting block; 42-Lower leg fixation outer plate; 421-Fixing hole; 422-Moving groove; 423-Adjusting groove; 424-Second sliding groove; 43-Lower leg fixing strap; 431-Second slider; 432-Bolt; 433-Gear; 434-Rack; 5-Load-bearing limit assembly; 51-Adjusting knob; 511-Rotating head; 512-Inner connecting shaft; 5121-Inner connecting head; 5122-Second spring; 5123-Rotating shaft section; 5124-Threaded connection section; 52-Adjusting rod; 521-Adjusting connecting section; 53-Limiting rod. Detailed Implementation

[0040] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0041] Example 1

[0042] A specific embodiment of this utility model discloses a fixation device for axial imaging examination of the knee joint, such as... Figure 1 As shown, the device includes a thigh fixation component 1, a support plate 2, a base plate component 3, a lower leg fixation component 4, and a weight-bearing limiting component 5. The thigh fixation component 1 is connected to the base plate component 3 via the support plate 2. The lower leg fixation component 4 is movably connected to the thigh fixation component 1. The weight-bearing limiting component 5 is connected to the lower leg fixation component 4. The weight-bearing limiting component 5 can place heavy objects to keep the quadriceps muscle in a tense state, thereby enabling the comparison of the patellar position of the quadriceps muscle in a relaxed state and a tense state through axial imaging of the knee joint.

[0043] Preferably, the support plate 2 is configured as a liftable structure, such as by using an electric cylinder to control the lifting of the support plate 2, so that the height of the support plate 2 can be adjusted according to the model of different instruments.

[0044] The thigh fixation assembly 1 includes a thigh support plate 11, a thigh fixation plate 12, and a thigh fixation strap 13. The thigh support plate 11 is connected to the support plate 2, the thigh fixation plate 12 is connected to the thigh support plate 11, and the thigh fixation strap 13 is disposed on the thigh fixation plate 12. The thigh fixation strap 13 can fix the patient's thigh relative to the thigh fixation plate 12.

[0045] For example, the thigh restraint strap 13 is a strap or Velcro.

[0046] Preferably, the thigh fixation strap 13 is made of non-woven fabric, nylon or other materials, so that the thigh fixation strap 13 has the characteristics of being comfortable, breathable and not easily deformed.

[0047] The base plate assembly 3 includes a base plate 31 and an angle adjustment component 32. The base plate 31 is connected to the thigh support plate 11 through the support plate 2. The base plate 31 can be fixed to the ground by fixing bolts and other fixing connectors. An angle adjustment component 32 is provided on the base plate 31. The angle adjustment component 32 is connected to the calf fixing assembly 4 and is used to adjust the angle between the calf fixing assembly 4 and the thigh support plate 11.

[0048] Preferably, a signal receiver is provided on the angle adjustment component 32, so that medical staff can control the movement of the angle adjustment component 32 via a computer or remote control.

[0049] For example, the angle adjustment component 32 is an electric cylinder, which extends and retracts to adjust the angle between the lower leg fixing component 4 and the thigh support plate 11. Electric cylinders are prior art and will not be described in detail here.

[0050] Preferably, the angle adjustment range between the lower leg fixing component 4 and the thigh support plate 11 is 60°~180°.

[0051] like Figures 1-4 As shown, the lower leg fixation assembly 4 includes an inner lower leg fixation plate 41, an outer lower leg fixation plate 42, and a lower leg fixation strap 43. The inner lower leg fixation plate 41 is movably connected to the thigh support plate 11. An adjustment groove 423 is provided on the outer lower leg fixation plate 42. An angle adjustment member 32 passes through the adjustment groove 423 and is connected to the inner lower leg fixation plate 41. The angle of the lower leg fixation assembly 4 is adjusted by the angle adjustment member 32. The outer lower leg fixation plate 42 has a hollow structure. The inner lower leg fixation plate 41 is placed in the cavity of the outer lower leg fixation plate 42. The lower leg fixation strap 43 is placed on the outer lower leg fixation plate 42. The outer lower leg fixation plate 42 can move along the inner lower leg fixation plate 41, thereby adjusting the length of the lower leg fixation assembly 4 according to the patient's height, and fixing the patient's lower leg by the lower leg fixation strap 43.

[0052] For example, the calf fixation strap 43 is a strap or Velcro.

[0053] Preferably, the calf fixation strap 43 is made of non-woven fabric, nylon or other materials, so that the calf fixation strap 43 has the characteristics of being comfortable, breathable and not easily deformed.

[0054] A fixing head 411 and a first spring 412 are provided on the inner plate 41 for fixing the lower leg. The fixing head 411 is connected to the inner plate 41 for fixing the lower leg through the first spring 412. A fixing hole 421 is provided on the outer plate 42 for fixing the lower leg. The shape of the fixing hole 421 matches the fixing head 411.

[0055] When it is necessary to adjust the calf fixing assembly 4, press the fixing head 411 to compress the first spring 412 and retract it into the inner calf fixing plate 41. Move the outer calf fixing plate 42 to keep the outer calf fixing plate 42 compressing the fixing head 411. When the fixing hole 421 is above the fixing head 411, the first spring 412 resets and drives the fixing head 411 to extend out of the inner calf fixing plate 41 and pass through the fixing hole 421, thereby fixing the position of the outer calf fixing plate 42.

[0056] like Figure 5 As shown, a connecting rod 413 is also provided on the inner plate 41 for fixing the lower leg, and a moving groove 422 is also provided on the outer plate 42 for fixing the lower leg. When adjusting the outer plate 42 for fixing the lower leg, the connecting rod 413 always remains through the moving groove 422, thereby preventing the connecting rod 413 from restricting the displacement of the outer plate 42 for fixing the lower leg.

[0057] like Figure 1 and Figures 5-6 As shown, the weight-bearing limiting component 5 includes an adjustment knob 51, an adjustment rod 52, and a limiting rod 53. One end of the adjustment rod 52 is connected to the connecting rod 413 via the adjustment knob 51, and the other end is connected to the limiting rod 53. The limiting rod 53 can apply pressure to the patient's lower leg. The adjustment knob 51 passes through the adjustment rod 52 and is threadedly connected to the connecting rod 413. The adjustment knob 51 is used to fix the included angle between the adjustment rod 52 and the connecting rod 413.

[0058] Preferably, a weight can be placed at the end of the limiting rod 53 and fixed by components such as buckles and clasps, thereby increasing the pressure of the limiting rod 53 on the patient's leg and keeping the quadriceps muscle in a state of tension.

[0059] Preferably, a sponge pad is provided on the limiting rod 53, which can improve the comfort of the lower leg when the lower leg pushes the limiting rod 53 with force and prevent the lower leg from hitting the limiting rod 53 and causing injury.

[0060] like Figures 6-8 As shown, the adjustment knob 51 includes a rotating head 511 and an inner connecting shaft 512. The rotating head 511 has a hollow structure, and the inner connecting shaft 512 is disposed inside the rotating head 511. The inner connecting shaft 512 is connected to the rotating head 511 through a bearing seat, and the rotating head 511 has a thread on its outer side. The inner connecting shaft 512 includes an inner connecting head 5121, a second spring 5122, a rotating shaft section 5123, and a threaded connection section 5124. The inner connecting head 5121 is connected to the rotating head 511 through the bearing seat, thereby avoiding the influence of adjusting the rotating head 511 on the inner connecting shaft 512. The rotating shaft section 5123 is connected to the inner connecting head 5121 through the second spring 5122. The extension and retraction properties of the second spring 5122 allow the rotating head 511 to move closer to or further away from the rotating shaft section 5123 when the rotating shaft section 5123 is fixed. The threaded connection section 5124 is connected to the rotating shaft section 5123.

[0061] like Figure 6 As shown, the connecting rod 413 is provided with an adjusting groove 4131 and a limiting block 4132. The limiting block 4132 is located within the adjusting groove 4131 and is used to restrict the movement of the adjusting rod 52, thereby fixing the maximum angle between the adjusting rod 52 and the lower leg fixing outer plate 42. The adjusting rod 52 is provided with an adjusting connecting section 521, which is located within the adjusting groove 4131. The adjusting connecting section 521 is provided with a threaded hole. The diameter of the rotating shaft section 5123 is smaller than the diameter of the threaded hole. The threaded connecting section 5124 passes through the threaded hole on the adjusting connecting section 521 and is threadedly connected to the connecting rod 413, so that the rotating shaft section 5123 is located within the adjusting groove 4131. The adjusting connecting section 521 can rotate within the adjusting groove 4131 around the rotating shaft section 5123, thereby changing the angle between the adjusting rod 52 and the connecting rod 413, and thus changing the angle between the limiting rod 53 and the lower leg fixing outer plate 42. The rotating head 511 engages with the threaded hole on the adjusting connecting section 521. Adjusting the rotating head 511 allows it to be threadedly connected to the adjusting rod 52 through the threaded hole on the adjusting connecting section 521, thereby fixing the position of the adjusting rod 52. The limiting block 4132 restricts the rotation of the adjusting rod 52, thereby fixing the knee flexion angle when the patient raises the limiting rod 53. For example, the maximum included angle between the limiting rod 53 and the lower leg fixation outer plate 42 is 60°.

[0062] Preferably, the connecting rod 413 is also provided with an angle scale, which is used to measure the included angle between the adjusting rod 52 and the connecting rod 413.

[0063] Taking a patient's lower leg bent at 30° as an example, when it is necessary to examine the patient's knee joint axis, first take an X-ray of the knee with the quadriceps muscle in a relaxed state. Adjust the rotating head 511 to disengage it from the adjusting rod 52, thereby releasing the fixation of the adjusting rod 52. Adjust the angle between the limiting rod 53 and the lower leg fixing outer plate 42 so that the patient's lower leg can be fixed by the lower leg fixing strap 43. Adjust the rotating head 511 to fix the adjusting rod 52. The patient's thigh and lower leg are fixed by the thigh fixation strap 13 and the lower leg fixation strap 43, so that the patient's thigh is close to the thigh support plate 11 and the lower leg is close to the lower leg fixation outer plate 42. The angle between the lower leg fixation outer plate 42 and the thigh support plate 11 is adjusted by the angle adjustment component 32 so that the patient's lower leg is bent at 30°. At this time, the angle between the lower leg fixation outer plate 42 and the thigh support plate 11 is 120°. The patient's knee is then examined by imaging to obtain the image when the patient's lower leg is bent at 30° and the patient's quadriceps muscle is in a relaxed state.

[0064] Subsequently, an X-ray was taken of the patient's knee when the quadriceps femoris muscle was under tension. The angle between the lower leg fixation plate 42 and the thigh support plate 11 was adjusted using the angle adjustment component 32 to achieve an angle of 90 degrees. The lower leg fixation strap 43 was then released from the patient's lower leg. Appropriate weight was added to both ends of the limiting rod 53. The rotating head 511 was adjusted to release the fixation on the adjusting rod 52. The limiting rod 53 was slowly adjusted until it came into contact with the patient's lower leg, causing the patient's lower leg to rise. The bending angle of the patient's lower leg was read using the angle scale until the patient's lower leg bent at 30°. An imaging examination of the patient's knee was then performed to obtain the X-ray results when the patient's lower leg was bent at 30° and the quadriceps femoris muscle was under tension.

[0065] Example 2

[0066] A specific embodiment of this utility model discloses a fixation device for axial imaging examination of the knee joint, such as... Figures 9-10 As shown, the difference from Embodiment 1 is that a first sliding groove 111 is provided on the thigh support plate 11, and a first slider 121 is provided on the thigh fixation plate 12. The first slider 121 cooperates with the first sliding groove 111, so that the first slider 121 can move along the first sliding groove 111, thereby adjusting the position of the thigh fixation plate 12 according to the patient's body shape. A second sliding groove 424 is provided on the calf fixation outer plate 42, and a second slider 431 is also provided on the calf fixation strap 43. The second slider 431 cooperates with the second sliding groove 424, so that the second slider 431 can move along the second sliding groove 424, thereby adjusting the position of the calf fixation strap 43 according to the patient's body shape.

[0067] like Figure 9 As shown, a fixing pin 122 is also provided on the thigh fixing plate 12, and a pin hole 1111 is provided in the first sliding groove 111. The fixing pin 122 cooperates with the pin hole 1111. The fixing pin 122 passes through the thigh fixing plate 12 and the first slider 121 and enters the pin hole 1111, thereby fixing the position of the thigh fixing plate 12.

[0068] like Figures 10-11 As shown, a bolt 432 is provided on the second slider 431. The bolt 432 enters the slider 431. A gear 433 is provided at the bottom of the bolt 432. The bolt 432 and the gear 433 are fixedly connected. The second slider 431 is also provided with a rack 434. The rack 434 cooperates with the gear 433. The rack 434 passes through the side of the second slider 431 near the inner wall of the second slide groove 424 and contacts the second slider 431. By rotating the bolt 432, the gear 433 can be driven to rotate, so that the rack 434 moves towards the second slide groove 424 as the gear 433 rotates. The rack 434 presses tightly against the second slide groove 424 to fix the position of the second slider 431.

[0069] Preferably, rubber is provided on the side of the rack 434 that contacts the second groove 424.

[0070] Preferably, there are two racks 434, which are arranged on both sides of the gear 433, so that the gear 433 drives the racks 434 to press tightly against the inner walls of both sides of the second slide groove 424, thereby increasing the stability of the slider 431.

[0071] Compared with the prior art, the knee joint axial imaging fixation device of this utility model, by setting a weight-bearing limiting component 5, allows the patient to push the limiting rod 53 with the lower leg to put the quadriceps muscle in a tense state. By setting an adjustment knob 51, the angle between the limiting rod 53 and the lower leg fixation outer plate 42 can be changed and the position of the limiting rod 53 can be fixed. Thus, when the knee joint is fixed at the same angle, the quadriceps muscle can be in a tense state and a relaxed state respectively without changing the angle, and the position of the patella can be taken into axial radiographs. By setting a lower leg fixation outer plate 42 and a lower leg fixation inner plate 41, the length of the lower leg fixation component 4 can be increased by moving the lower leg fixation outer plate 42 along the lower leg fixation inner plate 41, which is convenient for adjustment according to the patient's height. By setting an adjustment knob 51, an adjustment rod 52, a limiting rod 53, and a connecting rod 413, the included angle between the limiting rod 53 and the lower leg fixation outer plate 42 can be adjusted and fixed. The rotation of the adjustment rod 52 is restricted by the limiting block 4132 to prevent the patient's lower leg from bending too much when pushing the limiting rod 53, which could cause injury to the patient. By setting a first slider 121 and a fixing pin 122 that can move along the first slide groove 111 on the thigh fixation plate 12, and a second slider 431 that can move along the second slide groove 424 on the lower leg fixation strap 43, as well as bolts 432, gears 433, and racks 434, the thigh fixation plate 12 and the lower leg fixation strap 43 can be adjusted according to the patient's body size, thereby increasing the fixation effect and the patient's comfort.

[0072] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fixation device for axial imaging examination of the knee joint, characterized in that, It includes a thigh fixation component (1), a support plate (2), a base plate component (3), a calf fixation component (4), and a weight-bearing limiting component (5). The thigh fixation component (1) is connected to the base plate component (3) through the support plate (2). The calf fixation component (4) is connected to the thigh fixation component (1). The weight-bearing limiting component (5) is connected to the calf fixation component (4). The weight-bearing limiting component (5) can place heavy objects to maintain the tension of the quadriceps muscle. The load-bearing limiting component (5) includes an adjusting rod (52) and a limiting rod (53). The adjusting rod (52) is connected to the lower leg fixing component (4), and the limiting rod (53) is connected to the adjusting rod (52). The limiting rod (53) can apply pressure to the lower leg.

2. The knee joint axial imaging fixation device according to claim 1, characterized in that, The lower leg fixing assembly (4) includes a lower leg fixing inner plate (41) and a lower leg fixing outer plate (42), and the load-bearing limiting assembly (5) also includes an adjustment knob (51); The lower leg fixing outer plate (42) has a hollow structure, and the lower leg fixing inner plate (41) is disposed in the hollow of the lower leg fixing outer plate (42). A connecting rod (413) is provided on the lower leg fixing inner plate (41). The adjusting rod (52) is connected to the connecting rod (413) through the adjusting knob (51). The adjusting knob (51) passes through the adjusting rod (52) and is connected to the connecting rod (413).

3. The knee joint axial imaging fixation device according to claim 2, characterized in that, The adjustment knob (51) includes a rotating head (511) and an inner connecting shaft (512). The rotating head (511) has a hollow structure, and the inner connecting shaft (512) is disposed inside the rotating head (511). The inner connecting shaft (512) includes an inner connecting head (5121), a second spring (5122), a rotating shaft section (5123), and a threaded connecting section (5124). The inner connecting head (5121) is connected to the rotating head (511) through a bearing seat, and the rotating shaft section (5123) is connected to the inner connecting head (5121) through the second spring (5122).

4. The knee joint axial imaging fixation device according to claim 3, characterized in that, The connecting rod (413) is provided with an adjusting slide groove (4131) and a limiting block (4132). The limiting block (4132) is disposed in the adjusting slide groove (4131). The threaded connection section (5124) passes through the adjusting slide groove (4131) and is connected to the connecting rod (413).

5. The knee joint axial imaging fixation device according to claim 4, characterized in that, The adjusting rod (52) is provided with an adjusting connecting section (521), which is located in the adjusting groove (4131). The adjusting connecting section (521) is provided with a threaded hole. The diameter of the rotating shaft section (5123) is smaller than the diameter of the threaded hole on the adjusting connecting section (521). The rotating shaft section (5123) passes through the threaded hole on the adjusting connecting section (521). The adjusting connecting section (521) can rotate in the adjusting groove (4131) with the rotating shaft section (5123) as the axis. The rotating head (511) can enter the threaded hole on the adjusting connecting section (521) and be threadedly connected to the adjusting connecting section (521).

6. The knee joint axial imaging fixation device according to claim 2, characterized in that, The inner calf fixing plate (41) is provided with a fixing head (411) and a first spring (412). The fixing head (411) is connected to the inner calf fixing plate (41) through the first spring (412). The outer calf fixing plate (42) is provided with a fixing hole (421). The fixing head (411) can pass through the fixing hole (421) to fix the position of the outer calf fixing plate (42). The end of the limiting rod (53) can be used to hang heavy objects.

7. The knee joint axial imaging fixation device according to claim 2, characterized in that, The base plate assembly (3) includes a base plate (31) and an angle adjustment member (32). An adjustment groove (423) is provided on the lower leg fixing outer plate (42). The angle adjustment member (32) passes through the adjustment groove (423) and is connected to the lower leg fixing inner plate (41).

8. The knee joint axial imaging fixation device according to any one of claims 2-7, characterized in that, The thigh fixation assembly (1) includes a thigh support plate (11), a thigh fixation plate (12), and a thigh fixation strap (13). The thigh support plate (11) is connected to the support plate (2), the thigh fixation plate (12) is connected to the thigh support plate (11), the thigh fixation strap (13) is disposed on the thigh fixation plate (12), and the lower leg fixation inner plate (41) is connected to the thigh support plate (11).

9. The knee joint axial imaging fixation device according to claim 8, characterized in that, The thigh support plate (11) is provided with a first sliding groove (111), and a pin hole (1111) is provided in the first sliding groove (111). The thigh fixing plate (12) is provided with a first slider (121), and the first slider (121) can move along the first sliding groove (111).

10. The knee joint axial imaging fixation device according to claim 9, characterized in that, The lower leg fixing assembly (4) further includes a lower leg fixing strap (43), a second sliding groove (424) is provided on the lower leg fixing outer plate (42), and a second slider (431) is provided on the lower leg fixing strap (43). The second slider (431) can move along the second sliding groove (424).

Images