Body position placing device for knee joint replacement

Abstract

The utility model discloses a position placing device for knee arthroplasty. The position placing device comprises a bottom plate, a thigh supporting assembly and a knee joint supporting assembly. A thigh supporting assembly and a knee joint supporting assembly are arranged at the upper end of the bottom plate, the position of a thigh can be limited through the thigh supporting assembly, so that the movement of the whole leg can be further limited, the knee joint can be further relatively fixed by limiting the movement of the thigh, and the knee joint cannot shake or topple; the knee joint supporting assembly can support the knee joint, during supporting, the angle between the adjusting rod and the rotating rod can be adjusted in a large range through the angle adjusting rod, namely, the placing angle of the knee joint can be adjusted, and adjustment can be conducted according to different angles; the second sliding block can be reversely adjusted by rotating the second control knob, so that the rotating rod is further finely adjusted to approach the angle adjusting rod, and fine adjustment is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and in particular relates to a body positioning device for knee replacement surgery. Background Art

[0002] Knee replacement surgery involves removing the joint surface that the body can no longer repair and replacing it with an artificial joint component to restore knee function. The goal of this surgery is to relieve pain, stabilize the joint, correct deformities, and restore mobility to a previously stiff and restricted joint, significantly improving its function.

[0003] The reason for knee replacement surgery is usually that the patient's knee joint has severe degenerative lesions, which affect the joint function. Degenerative lesions refer to the degeneration of the joints caused by aging or other factors, which may cause symptoms such as joint pain, swelling, and deformity. Knee replacement surgery is an effective treatment method that can significantly improve these symptoms and improve the patient's quality of life. However, when performing knee replacement surgery, there are certain requirements for the patient's leg position, such as requiring the patient's knee to be bent to a certain degree and not allowing the patient's feet to swing freely, in order to ensure the normal progress of the operation.

[0004] Currently, the method used is to anesthetize the patient, artificially bend the knee joint, and then stand the patient upright on the operating table. Other doctors are needed to assist in fixing the patient's leg. After fixation, when adjusting the bending angle of the knee joint again, the patient's foot needs to be lifted up and adjusted and then fixed again. This is inconvenient to adjust, which increases the tediousness of the doctor's operation process to a certain extent, and it is difficult to make minor adjustments.

[0005] Therefore, a knee replacement body positioning device is needed to solve the above problems. Utility Model Content

[0006] In order to solve the above technical problems, the utility model designs a knee replacement body positioning device, comprising: a base plate, a thigh support assembly, and a knee joint support assembly; a square groove is opened on one side of the upper end of the base plate, and a plurality of limit blocks are arranged in a linear array on both sides of the upper end of the square groove. The knee joint support assembly is installed in the square groove, and the thigh support assembly is fixedly installed at the rear end of the knee joint support assembly;

[0007] The knee joint support assembly includes a screw rod, a first slider, a second slider, and a support adjustment component; the screw rods are provided with two and are installed in parallel on the square slot; the first slider and the second slider are respectively rotatably connected to the two screw rods, and the first slider and the second slider are adjusted to move closer or farther from each other by rotating different screw rods;

[0008] The support adjustment component includes an angle adjustment rod, a rotating rod, and a support pad; the upper end of the rotating rod and the angle adjustment rod are rotatably connected on an axis, and the support pad is fixedly provided on the upper end; the end of the rotating rod is rotatably connected to the second slider, and the end of the angle adjustment rod can be optionally installed between the limit blocks; the angle between the angle adjustment rod and the rotating rod is adjusted by adjusting the position of the angle adjustment rod on the limit block, and the first slider is fine-tuned by adjusting the rotation of the screw rod;

[0009] Furthermore, the thigh fixing assembly includes a telescopic platform and a fixed cylinder; the telescopic platform is fixedly connected to the base plate, and the end of the telescopic platform is fixedly connected to the fixed cylinder; the fixed cylinder is a hollow structure, and an adjustment rod is connected to the interior through a thread, one end of the adjustment rod is movably connected to the support plate, and the other end is fixedly connected to the adjustment knob;

[0010] Furthermore, a lifting rod is fixedly provided on the upper end of the first slider, and a foot fixing plate is fixedly connected to the end of the lifting rod, and straps are provided on both sides of the foot fixing plate;

[0011] Furthermore, the limit block is a trapezoidal structure as a whole, and the waists on both sides are arc-shaped structures;

[0012] Furthermore, telescopic rods are provided at intervals on both sides of the base plate, and locking components are provided at the ends of the telescopic rods, through which the entire device can be clamped on the bed;

[0013] Furthermore, a first control knob and a second control knob are respectively provided at the ends of the screw rod, and the first control knob and the second control knob respectively control the screw rod to control the sliding of the first slider and the second slider.

[0014] The beneficial effects of the utility model are:

[0015] The utility model is provided with a thigh support assembly and a knee joint support assembly at the upper end of the base plate. The thigh support assembly can limit the position of the thigh, thereby further limiting the movement of the entire leg. By limiting the movement of the thigh, the knee joint can be relatively fixed so that the knee joint will not shake or fall. In addition, the utility model can support the knee joint by using the knee joint support assembly. During support, the angle between the adjustment rod and the rotating rod can be adjusted over a large range through the angle adjustment rod, that is, the angle of the knee joint when it is placed can be adjusted according to different angles. The second slider can be reversed by rotating the second control knob to further fine-tune the rotating rod closer to the angle adjustment rod for fine adjustment. In addition, the utility model can fix the patient's foot on the foot fixation plate, further fixing the patient's calf. At the same time, after fixation, the lifting rod can be adjusted up and down to tighten or relax the knee position, which is convenient for the doctor's subsequent operation. The entire device is supported and fixed in the form of a rod, which will not affect the position and operation of the operation and can fully expose the surgical field of view and operating space. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for describing the embodiments.

[0017] Figure 1 The present invention is a schematic diagram of the overall structure of a body positioning device for knee replacement surgery;

[0018] Figure 2 The present invention is a top view of a positioning device for knee replacement surgery;

[0019] Figure 3 The present invention is a schematic structural diagram of a knee joint support component of a body positioning device for knee replacement surgery;

[0020] Figure 4 The present invention is a schematic structural diagram of a thigh fixation component of a knee replacement body positioning device;

[0021] Figure 5 The figure is a side view of a positioning device for knee replacement surgery.

[0022] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0023] 1-base plate, 11-telescopic rod, 12-locking assembly, 13-square slot, 2-thigh support assembly, 21-telescopic platform, 22-adjustment rod, 23-support plate, 24-adjustment knob, 3-knee joint support assembly, 31-first control knob, 311-first slider, 32-second control knob, 321-second slider, 33-screw, 34-lifting rod, 35-foot fixing plate, 351-strap, 36-angle adjustment rod, 37-rotation rod, 38-support pad, 39-limit block. DETAILED DESCRIPTION

[0024] The utility model discloses a knee replacement body positioning device, comprising: a base plate 1, a thigh support assembly 2, and a knee joint support assembly 3; a square groove 13 is opened on one side of the upper end of the base plate 1, and a plurality of limit blocks 39 are arranged in a linear array on both sides of the upper end of the square groove 13, the knee joint support assembly 3 is installed on the square groove 13, and the rear end of the knee joint support assembly 3 is fixedly provided with the thigh support assembly 2; telescopic rods 11 are arranged at intervals on both sides of the base plate 1, and a locking assembly 12 is arranged at the end of the telescopic rod 11, and the entire device can be clamped on the bed by the locking assembly 12; during the clamping time, the telescopic rod 11 is first pulled out and then locked by the locking assembly 12. The locking assembly 12 used in the present invention is in the form of a bolt plus a fixing plate for fixing. When fixing, the fixing plate is aligned and the bolt is tightened.

[0025] The knee joint support assembly 3 includes a screw rod 33, a first slider 311, a second slider 321, and a support adjustment component; the screw rod 33 is provided with two and is installed in parallel on the square slot 13, the first slider 311 and the second slider 321 are respectively rotatably connected to the two screw rods 33, and the first slider 311 and the second slider 321 are adjusted to move closer to or farther from each other by rotating different screw rods 33; the ends of the screw rod 33 are respectively provided with a first control knob 31 and a second control knob 32, and the first control knob 31 and the second control knob 32 respectively control the screw rod 33 to control the sliding of the first slider 311 and the second slider 321 movement; during adjustment, the rotation of the screw rod 33 is controlled by rotating the first control knob 31 and the second control knob 32 in the forward or reverse direction, thereby controlling the movement of the slider. The rotation direction of the first control knob 31 and the second control knob 32 is related to the left and right rotation of the thread set on the screw rod 33. Since the first slider 311 and the second slider 321 are respectively rotatably connected to the two screw rods 33, they can be set to rotate in the same direction or in the opposite direction to achieve the function of fine-tuning. The first control knob 31 adjusts the forward and backward movement of the foot fixing plate 35 to adapt to the length of the calves of different people, thereby adapting to the position of the foot.

[0026] The support adjustment component includes an angle adjustment rod 3622, a rotating rod 37, and a support pad 38; the upper end of the rotating rod 3622 is rotatably connected to an axis, and the support pad 38 is fixedly set at the upper end; the end of the rotating rod 37 is rotatably connected to the second slider 321, and the end of the angle adjustment rod 3622 can be optionally installed between the limit blocks 39; the angle between the angle adjustment rod 3622 and the rotating rod 37 is adjusted by adjusting the position of the angle adjustment rod 3622 on the limit block 39, and the first slider 311 is fine-tuned by adjusting the rotation of the screw rod 33; the knee joint support assembly 3 and the thigh fixing assembly in the present invention only represent one side, and if necessary, the same assembly can be set on the other side of the base plate 1.

[0027] Example 1

[0028] In this embodiment, the thigh fixation assembly includes a telescopic platform 21 and a fixing cylinder; the telescopic platform 21 is fixedly connected to the base plate 1, and the end of the telescopic platform 21 is fixedly connected to the fixing cylinder; the fixing cylinder is a hollow structure, and an adjusting rod 22 is connected to the interior through a thread, one end of the adjustment is movably connected to a support plate 23, and the other end is fixedly connected to an adjusting knob 24; the patient's thigh can be fixed by the thigh fixation assembly, and the thigh fixation assembly is stacked and arranged on both sides of the central axis of the knee fixation assembly. When fixing, first rotate the adjusting knob 24 to drive the adjusting rod 22 to rotate, so that the support plate 23 is gradually close to the thigh and fixed, and the support plate 23 is movably connected to the adjusting rod The front end of 22, so when the adjusting rod 22 is rotated, the support plate 23 does not rotate with it, or it is directed to rotate slightly, such as by using a bearing for rotational connection, until the support plate 23 is rotated to the position of the thigh to form a fixation; in addition, since the thigh and the base plate 1 will form a certain angle when fixed, the position of the telescopic platform 21 can be adjusted, and then the support plate 23 can be rotated to fix it. Although the support plate 23 is rotatable, with the cooperation of the support assembly, the thigh will not move back and forth, and can form a stable fixation; the telescopic platform 21 described in this embodiment is the telescopic rod 11 or other telescopic and fixable form in the prior art, which is the prior art and will not be described in detail here.

[0029] Example 2

[0030] In this embodiment, a lifting rod 34 is fixedly provided at the upper end of the first slider 311, and a downward lifting effect can be achieved by the lifting rod 34. The lifting rod 34 is in the form of a telescopic rod 11 in the prior art, and can be fixed by a spring pin, which is a form that can be achieved in the prior art. The end of the lifting rod 34 is fixedly connected to a foot fixing plate 35, and straps 351 are provided on both sides of the foot fixing plate 35. The patient's foot can be placed on the foot fixing plate 35, and the patient's foot can be fixed by the straps 351.

[0031] In addition, in this embodiment, the limit block 39 in the knee joint support assembly 3 is a trapezoidal structure as a whole, and the waists on both sides are arc-shaped structures. The arc-shaped structures can form a semicircle after splicing, and the size is the same as the rod diameter at the end of the angle adjustment rod 3622. The arc-shaped structure can form a tight wrapping of the angle adjustment rod 3622, so that the whole will not have bumps when adjusting, especially when fine-tuning, no matter how the adjustment is made, good stability can be maintained.

[0032] The operating principle of the present invention is as follows: when in use, first fix the entire device on the operating table through the telescopic rods 11 and the adjustment components on both sides of the base plate 1; then, after the patient is anesthetized, the patient's legs are placed between the thigh fixing components, and the patient's joints are placed on the knee support component. At the same time, the patient's feet are placed on the foot fixing plate 35 and fixed with the straps 351. If the height of the foot fixing plate 35 is not enough, it can be raised and lowered by the lifting rod 34; then, the adjusting rod 22 is rotated to rotate the support plate 23 to the patient's thigh to fix the thigh, and then, according to different angle requirements, the position of the angle adjustment rod 3622 on the limit block 39 is adjusted to a large extent, and then the second slider 321 is fine-tuned by rotating the second control knob 32 to further achieve fine-tuning of the angle requirement. After the adjustment is completed, the operation can be started.

[0033] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the present invention to only the specific implementation methods described.

Claims

1. A knee replacement body positioning device, characterized in that: include: A base plate, a thigh support assembly, and a knee joint support assembly; a square groove is provided on one side of the upper end of the base plate, a plurality of limit blocks are provided in a linear array on both sides of the upper end of the square groove, the knee joint support assembly is installed on the square groove, and a thigh support assembly is fixedly provided on the rear end of the knee joint support assembly; The knee joint support assembly includes a screw rod, a first slider, a second slider, and a support adjustment component; the screw rods are provided with two and are installed in parallel on the square slot; the first slider and the second slider are respectively rotatably connected to the two screw rods, and the first slider and the second slider are adjusted to move closer or farther from each other by rotating different screw rods; The support adjustment component includes an angle adjustment rod, a rotating rod, and a support pad; the upper end of the rotating rod and the angle adjustment rod are rotatably connected on an axis, and the support pad is fixed to the upper end; the end of the rotating rod is rotatably connected to the second slider, and the end of the angle adjustment rod can be optionally installed between the limit blocks; the angle between the angle adjustment rod and the rotating rod is adjusted by adjusting the position of the angle adjustment rod on the limit block, and the first slider is fine-tuned by adjusting the rotation of the screw rod.

2. A knee replacement body positioning device according to claim 1, characterized in that: The thigh support assembly includes a telescopic platform and a fixed tube; the telescopic platform is fixedly connected to the base plate, and the end of the telescopic platform is fixedly connected to the fixed tube; the fixed tube is a hollow structure, and an adjustment rod is connected to the inside through a thread, one end of the adjustment is movably connected to the support plate, and the other end is fixedly connected to the adjustment knob.

3. The knee replacement body positioning device according to claim 1, characterized in that: A lifting rod is fixedly provided on the upper end of the first sliding block, and a foot fixing plate is fixedly connected to the end of the lifting rod. Straps are provided on both sides of the foot fixing plate.

4. The knee replacement body positioning device according to claim 1, characterized in that: The limiting block is a trapezoidal structure as a whole, and the waists on both sides are arc-shaped structures.

5. The knee replacement body positioning device according to claim 1, characterized in that: Telescopic rods are arranged at intervals on both sides of the bottom plate, and locking components are arranged at the ends of the telescopic rods. The entire device can be clamped on the bed through the locking components.

6. The knee replacement body positioning device according to claim 1, characterized in that: The ends of the screw rod are respectively provided with a first control knob and a second control knob, and the first control knob and the second control knob respectively control the screw rod to control the sliding of the first slider and the second slider.

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