Adjustable knee joint flexion maintaining device for knee joint replacement surgery

Abstract

The invention aims to provide an adjustable knee joint flexion maintaining device for knee joint replacement surgery, and relates to the technical field of medical instruments. A thigh supporter and a shank supporter are arranged on a supporting plate; during use, the thighs and the shanks of a patient are placed on the thigh plates and the shank plates of the thigh supporting device and the shank supporting device, the thigh plates are supported below the thighs, the shank plates are supported below the shanks, and the peripheries of knee joints are fully exposed; by rotating the thigh screw rod and the shank screw rod, the angles of the thigh plate and the shank plate are adjusted, and the knee joint buckling angle is adjusted; the distance between the thigh supporter and the shank supporter is adjusted through sliding of the thigh supporter; the height of the lower portion of the shank plate is adjusted through stretching of the telescopic rod, the bending angle of the knee joint and the height of the shank are further adjusted in cooperation with rotation of the shank plate, and the position of the lower limb can be better adjusted according to actual knee joint operation conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to an adjustable knee flexion holding device for knee replacement surgery. Background Art

[0002] Knee replacement surgery is a surgical procedure widely used to treat severe knee arthritis and knee injuries. This surgery aims to restore the lower limb's weight-bearing line, knee joint stability, eliminate pain, and reconstruct knee joint function by removing the damaged joint surface and replacing it with artificial joint components.

[0003] During knee replacement surgery, the patient's lower limb needs to be maintained in a flexed position to expose the knee joint for subsequent surgical operations. However, in current knee flexion holding devices, the support point is below the knee joint, which easily interferes with surgical operations. Moreover, existing holding devices mostly adjust the knee flexion angle but are not convenient for adjusting the knee abduction angle and cannot well adjust the lower limb position according to the actual surgical situation. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides the following technical solutions: An adjustable knee flexion holding device for knee replacement surgery, comprising a fixing component and a support plate, wherein the support plate is rotatably connected to the fixing component; a thigh support and a calf support are arranged on the support plate; The thigh support includes a thigh plate and a restraint plate, one end of the thigh plate is rotatably connected to the support plate, and the restraint plate is rotatably connected to the other end of the thigh plate; The calf support is slidably mounted on the support plate, and the calf support includes a limit plate and a calf plate; the limit plate is slidably connected to the support plate, a telescopic rod is fixedly arranged on the limit plate, and one end of the calf plate is rotatably connected to the extended end of the telescopic rod.

[0005] Further, the rear end of the thigh plate is rotatably connected to the support plate, and the restraint plate is rotatably mounted on the front end of the thigh plate.

[0006] Further, a thigh slider is slidably arranged on the support plate, and a thigh lead screw is rotatably arranged on the support plate. The thigh slider is threadedly sleeved on the thigh lead screw; a thigh support rod is rotatably mounted below the thigh plate, and one end of the thigh support rod is rotatably connected to the slider. By rotating the thigh lead screw to drive the thigh slider to slide, the thigh support rod is driven to rotate, thereby adjusting the rotation angle of the thigh plate.

[0007] Further, the front end of the calf plate is rotatably connected to the extended end of the telescopic rod.

[0008] Further, a sliding seat is fixedly arranged on the non-extending end of the telescopic rod. A calf slider is slidably arranged on the sliding seat, and a calf lead screw is rotatably arranged in the sliding seat. The calf slider is threadedly sleeved on the calf lead screw. A calf support rod is rotatably arranged on the calf slider. A sliding groove is arranged on the calf plate. One end of the calf support rod is fixedly provided with a cylinder, and the cylinder is movably located in the sliding groove.

[0009] Further, a knob is rotatably arranged on the sliding seat, and a bevel gear set is arranged in the sliding seat. The knob is connected to the calf lead screw through the bevel gear set. By rotating the knob, the calf lead screw is driven to rotate to drive the calf slider to slide, thereby driving the calf support rod to rotate, so as to adjust the rotation angle of the calf plate.

[0010] Further, a screw rod is rotatably arranged on the support plate, and the limiting plate is threadedly sleeved on the screw rod. By rotating the screw rod, the limiting plate is driven to slide.

[0011] Further, a plurality of pin holes are formed on the extending end of the telescopic rod, and a pin is slidably arranged on the non-extending end of the telescopic rod. The expansion and contraction of the telescopic rod are restricted by the cooperation of the pin and the pin holes.

[0012] Further, a foot plate is slidably arranged on the calf plate, and a bolt is arranged on the foot plate. The sliding of the foot plate is restricted by tightening the bolt.

[0013] Further, a plurality of fixing straps are arranged on both the restraint plate and the calf plate.

[0014] Further, the fixing assembly includes a U-shaped fixing frame, a fixing plate, a fixing bolt, and a sliding plate. The fixing plate is located inside the U-shaped fixing frame. The fixing bolt threadedly passes through the U-shaped fixing frame and is movably connected to the fixing plate. The sliding plate is slidably connected to the U-shaped fixing frame. An avoidance groove is formed below the support plate, and a connecting column is fixedly arranged in the avoidance groove. An installation hole is formed on the sliding plate. The rotational connection between the support plate and the sliding plate is realized through the cooperation of the connecting column and the installation hole.

[0015] Further, a semi-circular serrated edge is fixedly arranged on the support plate, and a serrated block matched with the serrated edge is slidably arranged on the sliding plate. The rotation of the support plate is restricted by the cooperation of the serrated block and the serrated edge.

[0016] Further, a sliding lead screw and a limiting lead screw are rotatably arranged on the sliding plate. The sliding lead screw threadedly penetrates into the U-shaped fixing frame. By rotating the sliding lead screw, the sliding of the sliding plate is controlled. One end of the limiting lead screw is movably connected to the serrated block. By rotating the limiting lead screw, the serrated block is controlled to slide close to or away from the serrated edge.

[0017] Compared with the prior art, the technical solution of the present application has the following beneficial effects: The present invention provides a thigh support and a calf support on a support plate. During use, the patient's thigh and calf are placed on the thigh plate and calf plate of the thigh support and calf support respectively, such that the thigh plate supports under the thigh and the calf plate supports under the calf, fully exposing the surrounding of the knee joint. By rotating the thigh screw rod and calf screw rod respectively, the angles of the thigh plate and calf plate are adjusted, thereby adjusting the angle of the thigh plate supporting the thigh and the angle of the calf plate supporting the calf, and adjusting the flexion angle of the knee joint. By rotating the screw rod, the sliding of the thigh support can be controlled, thereby adjusting the distance between the thigh support and the calf support. And by extending and retracting the telescopic rod of the thigh support, the height under the calf plate is adjusted, cooperating with the rotation of the calf plate, further adjusting the flexion angle of the knee joint and the height of the calf, so as to better adjust the lower limb position according to the actual knee surgery situation. A restraint plate is rotatably installed at the front end of the thigh plate. Through the restraint plate, the thigh can be better supported. And a foot plate is slidably arranged on the calf plate to support the patient's sole, ensuring the comfort of the patient. After adjusting the knee joint angle, the patient's thigh and calf can be fixed through the fixing straps on the restraint plate and calf plate, thereby maintaining the flexion of the knee joint. The support plate is rotatably installed on the sliding plate of the fixing component. During use, through the fixing plate and U-shaped fixing frame of the fixing component, the device can be fixed to the edge of the operating table. By rotating the sliding screw rod to control the sliding of the sliding plate, the support plate can be moved under the patient's lower limb, and through the rotation of the support plate, the abduction angle of the patient's lower limb can be adjusted, better meeting the body position requirements during knee surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structure schematic diagram of the present invention; Figure 2 It is a structure schematic diagram of the fixing component of the present invention; Figure 3 It is a structure schematic diagram above the support plate of the present invention; Figure 4 It is a structure schematic diagram below the support plate of the present invention; Figure 5 It is a structure schematic diagram of the calf support of the present invention; Figure 6 It is a structure schematic diagram of the thigh support of the present invention.

[0019] In the figure: support plate - 1, avoidance groove - 11, connecting column - 111, serrated edge - 12, fixing belt - 2, thigh support - 3, thigh plate - 31, restraint plate - 32, thigh strut - 33, thigh slider - 34, thigh lead screw - 35, calf support - 4, limit plate - 41, telescopic rod - 42, pin - 421, screw - 43, calf plate - 44, foot plate - 45, calf strut - 46, sliding seat - 47, knob - 471, calf slider - 48, calf lead screw - 49, fixing component - 5, U - shaped fixing frame - 51, fixing plate - 52, fixing bolt - 53, sliding plate - 54, mounting hole - 541, sliding lead screw - 55, limit lead screw - 56, serrated block - 57. Detailed implementation mode

[0020] 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention. Embodiment 1

[0021] Please refer to Figure 1-6 , an adjustable knee flexion holding device for knee replacement surgery, including a fixing component 5 and a support plate 1, the support plate 1 is rotatably connected to the fixing component 5; a thigh support 33 and a calf support 4 are arranged on the support plate 1; the thigh support 33 includes a thigh plate 31 and a restraint plate 32, one end of the thigh plate 31 is rotatably connected to the support plate 1, and the restraint plate 32 is rotatably connected to the other end of the thigh plate 31; In this embodiment, the rear end of the thigh plate 31 is rotatably connected to the support plate 1, and the restraint plate 32 is rotatably installed at the front end of the thigh plate 31; a thigh slider 34 is slidably arranged on the support plate 1, and a thigh lead screw 35 is rotatably arranged on the support plate 1, and the thigh slider 34 is threadedly sleeved on the thigh lead screw 35; a thigh strut 33 is rotatably installed below the thigh plate 31, one end of the thigh strut 33 is rotatably connected to the slider, by rotating the thigh lead screw 35 to drive the thigh slider 34 to slide, thereby driving the thigh strut 33 to rotate, so as to adjust the rotation angle of the thigh plate 31; In this embodiment, the calf support 4 is slidably installed on the support plate 1, and the calf support 4 includes a limit plate 41 and a calf plate 44; the limit plate 41 is slidably connected to the support plate 1, a telescopic rod 42 is fixedly arranged on the limit plate 41, and one end of the calf plate 44 is rotatably connected to the extended end of the telescopic rod 42; In this embodiment, the front end of the calf plate 44 is rotatably connected to the extended end of the telescopic rod 42; a sliding seat 47 is fixedly arranged on the non-extended end of the telescopic rod 42, a calf slider 48 is slidably arranged on the sliding seat 47, and a calf lead screw 49 is rotatably arranged in the sliding seat 47. The calf slider 48 is threadedly sleeved on the calf lead screw 49; a calf support rod 46 is rotatably arranged on the calf slider 48, a sliding groove is arranged on the calf plate 44, and a cylinder is fixedly arranged at one end of the calf support rod 46 and is movable in the sliding groove; a knob 471 is rotatably arranged on the sliding seat 47, and a bevel gear set is arranged in the sliding seat 47. The knob 471 is connected to the calf lead screw 49 through the bevel gear set. By rotating the knob 471, the calf lead screw 49 is driven to rotate to drive the calf slider 48 to slide, thereby driving the calf support rod 46 to rotate, so as to adjust the rotation angle of the calf plate 44; In this embodiment, a screw rod 43 is rotatably arranged on the support plate 1, the limiting plate 41 is threadedly sleeved on the screw rod 43, and the limiting plate 41 is driven to slide by rotating the screw rod 43; a plurality of pin holes are formed in the extended end of the telescopic rod 42, and a plug pin 421 is slidably arranged on the non-extended end of the telescopic rod 42. The telescopic of the telescopic rod 42 is limited by the cooperation of the plug pin 421 and the pin holes; a foot plate 45 is slidably arranged on the calf plate 44, and a bolt is arranged on the foot plate 45, and the sliding of the foot plate 45 is limited by tightening the bolt; a plurality of fixing straps 2 are arranged on both the restraint plate 32 and the calf plate 44; In this embodiment, a thigh support 33 and a calf support 4 are arranged on the support plate 1; during use, the thighs and calves of the patient are placed on the thigh plates 31 and calf plates 44 of the thigh support 33 and the calf support 4, so that the thigh plates 31 support under the thighs and the calf plates 44 support under the calves, fully exposing the surroundings of the knee joint; by rotating the thigh lead screw 35 and the calf lead screw 49 respectively, the angles of the thigh plates 31 and the calf plates 44 are adjusted, so as to adjust the angles of the thigh plates 31 supporting the thighs and the calf plates 44 supporting the calves, and the flexion angle of the knee joint; By rotating the screw rod 43, the sliding of the thigh support 33 can be controlled, so as to adjust the distance between the thigh support 33 and the calf support 4; and the height below the calf plate 44 is adjusted by the telescopic of the telescopic rod 42 of the thigh support 33. Cooperating with the rotation of the calf plate 44, the flexion angle of the knee joint and the height of the calf are further adjusted, and the body position of the lower limb can be better adjusted according to the actual knee joint operation situation; A restraint plate 32 is rotatably installed at the front end of the thigh plate 31. The thigh can be better supported by the restraint plate 32, and a foot plate 45 is slidably arranged on the calf plate 44 to support the patient's sole, ensuring the comfort of the patient; after adjusting the knee joint angle, the thighs and calves of the patient can be fixed by the fixing straps 2 on the restraint plate 32 and the calf plate 44, so as to maintain the flexion of the knee joint. Embodiment 2

[0022] Please refer to Figure 1-6 Figure 1-6 , according to Embodiment 1, the fixing component 5 includes a U-shaped fixing frame 51, a fixing plate 52, a fixing bolt 53, and a sliding plate 54. The fixing plate 52 is located inside the U-shaped fixing frame 51, and the fixing bolt 53 is threadedly passed through the U-shaped fixing frame 51 and movably connected to the fixing plate 52; the sliding plate 54 is slidably connected to the U-shaped fixing frame 51; an avoidance groove 11 is opened below the support plate 1, a connecting column 111 is fixedly arranged in the avoidance groove 11, and a mounting hole 541 is opened on the sliding plate 54. The rotation connection between the support plate 1 and the sliding plate 54 is realized through the cooperation of the connecting column 111 and the mounting hole 541; In this embodiment, a semi-circular serrated edge 12 is fixedly arranged on the support plate 1, and a serrated block 57 matched with the serrated edge 12 is slidably arranged on the sliding plate 54; the rotation of the support plate 1 is restricted through the cooperation of the serrated block 57 and the serrated edge 12; a sliding lead screw 55 and a limiting lead screw 56 are rotatably arranged on the sliding plate 54. The sliding lead screw 55 is threadedly inserted into the U-shaped fixing frame 51, and the sliding of the sliding plate 54 is controlled by rotating the sliding lead screw 55; one end of the limiting lead screw 56 is movably connected to the serrated block 57, and the serrated block 57 is controlled to slide close to or away from the serrated edge 12 by rotating the limiting lead screw 56; In this embodiment, the support plate 1 is rotatably installed on the sliding plate 54 of the fixing component 5; during use, the device can be fixed to the edge of the operating table through the fixing plate 52 and the U-shaped fixing frame 51 of the fixing component 5; by rotating the sliding lead screw 55, the sliding of the sliding plate 54 is controlled, so as to move the support plate 1 under the lower limbs of the patient, and through the rotation of the support plate 1, the angle of abducting the lower limbs of the patient can be adjusted to better meet the body position during knee joint surgery.

[0023]

[0023] 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 the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the relevant technical fields can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. An adjustable knee flexion retaining device for knee replacement surgery, comprising a fixing assembly and a support plate, characterized in that: The support plate is rotatably connected to the fixed assembly; a thigh supporter and a calf supporter are arranged on the support plate; The thigh support device comprises a thigh plate and a restraining plate, one end of the thigh plate is rotatably connected to the support plate, and the restraining plate is rotatably connected to the other end of the thigh plate; The calf support is slidably mounted on the support plate, and the calf support comprises a limit plate and a calf plate; the limit plate is slidably connected to the support plate, a telescopic rod is fixedly arranged on the limit plate, and one end of the calf plate is rotatably connected to the protruding end of the telescopic rod.

2. An adjustable knee flexion retaining device for knee replacement surgery according to claim 1, characterized in that: The rear end of the thigh plate is rotatably connected to the supporting plate, and the restraining plate is rotatably mounted on the front end of the thigh plate.

3. An adjustable knee flexion retaining device for knee replacement surgery according to claim 2, characterized in that: A thigh slider is slidably arranged on the support plate, and a thigh screw rod is rotatably arranged on the support plate, and the thigh slider is threadedly sleeved on the thigh screw rod; a thigh support rod is rotatably installed under the thigh plate, and one end of the thigh support rod is rotatably connected to the slider, and the thigh slider is driven to slide by rotating the thigh screw rod, thereby driving the thigh support rod to rotate, thereby adjusting the rotation angle of the thigh plate.

4. The adjustable knee flexion retaining device for knee replacement surgery according to claim 1, characterized in that: The front end of the calf plate is rotatably connected to the extended end of the telescopic rod.

5. An adjustable knee flexion retaining device for knee replacement surgery according to claim 4, characterized in that: A sliding seat is fixedly arranged on the non-extending end of the telescopic rod, a calf slider is slidably arranged on the sliding seat, and a calf screw rod is rotatably arranged in the sliding seat, and the calf slider is threadedly sleeved on the calf screw rod; a calf support rod is rotatably arranged on the calf slider, a sliding groove is arranged on the calf plate, and a cylinder is fixedly arranged on one end of the calf support rod, and the cylinder is movable in the sliding groove.

6. An adjustable knee flexion retaining device for knee replacement surgery according to claim 5, characterized in that: A knob is rotatably arranged on the sliding seat, and a bevel gear set is arranged in the sliding seat. The knob is connected to the calf screw rod through the bevel gear set. The calf screw rod is rotated by rotating the knob to drive the calf slider to slide, thereby driving the calf support rod to rotate, thereby adjusting the rotation angle of the calf plate.

7. An adjustable knee flexion retaining device for knee replacement surgery according to claim 5, characterized in that: A screw is rotatably arranged on the support plate, and the limit plate is threadedly sleeved on the screw, and the limit plate is driven to slide by rotating the screw; a plurality of pin holes are provided on the extended end of the telescopic rod, and a latch is slidably arranged on the non-extended end of the telescopic rod, and the extension and retraction of the telescopic rod is limited by the cooperation between the latch and the pin hole.

8. The adjustable knee flexion retaining device for knee replacement surgery according to claim 1, characterized in that: A foot plate is slidably arranged on the calf plate, and bolts are arranged on the foot plate, and the sliding of the foot plate is restricted by tightening the bolts; a plurality of fixing belts are arranged on both the restraining plate and the calf plate.

9. The adjustable knee flexion retaining device for knee replacement surgery according to claim 1, characterized in that: The fixing assembly includes a U-shaped fixing frame, a fixing plate, a fixing bolt, and a sliding plate. The fixing plate is located in the U-shaped fixing frame, and the fixing bolt thread passes through the U-shaped fixing frame and is movably connected to the fixing plate; the sliding plate is slidably connected to the U-shaped fixing frame; an avoidance groove is provided under the support plate, a connecting column is fixedly arranged in the avoidance groove, and a mounting hole is provided on the sliding plate, and the rotational connection between the support plate and the sliding plate is realized through the cooperation between the connecting column and the mounting hole.

10. An adjustable knee flexion retaining device for knee replacement surgery according to claim 9, characterized in that: A semicircular serrated edge is fixedly provided on the support plate, and a serrated block cooperating with the serrated edge is slidably provided on the sliding plate; the rotation of the support plate is limited by the cooperation between the serrated block and the serrated edge; a sliding screw and a limiting screw are rotatably provided on the sliding plate, the sliding screw thread is inserted into the U-shaped fixed frame, and the sliding of the sliding plate is controlled by rotating the sliding screw; one end of the limiting screw is movably connected with the serrated block, and the serrated block is controlled to slide close to or away from the serrated edge by rotating the limiting screw.

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