DDH frog position plaster fixation auxiliary device

Abstract

The utility model discloses a kind of DDH frog position gypsum fixing auxiliary devices, belong to hip joint correction device technical field;Including: batten, sliding disc, leg support plate, foot support plate, foot pedal, support plate angle adjusting assembly;Sliding disc is movably arranged on batten;Sliding disc is set to two;Through support plate angle adjusting assembly, foot support plate is movably arranged on the sliding disc of front side;Through support plate angle adjusting assembly, leg support plate is movably arranged on the sliding disc of back side;Foot pedal is set on the top of foot support plate.The device sets symmetrical leg support plate and foot support plate, and the inclination angle of leg support plate and foot support plate can be adjusted according to the requirement of abduction angle;The distance between leg support plate and foot support plate is set to movably adjustable, and it is convenient to adjust to the hip flexion or knee flexion position of patient to keep specified angle;Solve the problem that patient position is not standard when DDH frog position gypsum fixing is currently carried out, cannot reach hip joint reduction standard, influence hip joint recovery effect.

Description

Technical Field

[0001] This utility model belongs to the technical field of hip joint correction devices, specifically relating to a DDH frog-position plaster fixation auxiliary device. Background Technology

[0002] Developmental dysplasia of the hip (DDH) is one of the most common structural deformities of the pediatric musculoskeletal system. DDH is a developmental disorder that progressively worsens with age, leading to limb deformities, functional impairments, and eventually, early-onset degenerative osteoarthritis, ultimately resulting in disability. Early treatment of DDH aims to restore the concentric relationship between the acetabulum and femoral head, primarily through conservative and non-surgical methods. However, as the child grows older or when closed reduction is no longer possible, open surgery becomes the main treatment to improve gait, relieve pain, and extend the lifespan of the hip joint.

[0003] The principle for the treatment of DDH is early diagnosis and early treatment. A step-by-step and individualized treatment plan should be adopted according to the patient's age, gender, and degree of lesion. In the early stage, efforts should be made to achieve concentric reduction of the acetabulum and femoral head and hip joint development. In the later stage, the reconstruction of hip joint structure and function should be carried out.

[0004] In DDH treatment, Harris's Law is followed: concentricity of the femoral head and acetabulum is the ultimate goal of treatment. Post-reduction hip joint stability and femoral head-acetabulum matching are prerequisites for normal development, stimulating the development and shaping of the femoral head and acetabulum. For children aged 6-18 months, or even up to 24 months, frog-leg cast immobilization is the preferred treatment method. Its efficacy has been confirmed by numerous studies, and it is characterized by minimal trauma and safe operation, fully utilizing the shaping potential of the acetabulum in young children to achieve femoral head-acetabulum matching and containment. The position of the frog-leg cast immobilization has strict requirements. Improper immobilization position may lead to avascular necrosis of the femoral head. It is necessary to fix the hip with 90°~100° flexion, knee with 90° flexion, and abduction with 30~45°.

[0005] Current frog-leg position plaster cast immobilization requires general anesthesia, and sometimes even intubation. The duration of anesthesia depends primarily on the duration of plaster cast immobilization, which previously required at least 40 minutes. Frog-leg position plaster casts have strict positioning requirements and require the cooperation of at least three experienced physicians to complete successfully; otherwise, the concentric reduction principle of the hip joint may be affected, potentially leading to avascular necrosis of the femoral head. Previously used clinical frog-leg position assistive devices were merely single wooden or metal strips, only able to maintain the child in a supine position. Manual maintenance of hip flexion (90°–100°), abduction (30–45°), and knee flexion (90°) was required. These devices could not maintain a neutral foot position, and there were inherent human deviations between the two sides, failing to ensure accurate positioning within the required range and thus affecting the child's hip joint recovery. Utility Model Content

[0006] This invention provides a DDH frog-leg position plaster fixation auxiliary device. The device features symmetrical leg and foot supports, the tilt angles of which are adjustable according to abduction requirements. The distance between the leg and foot supports is adjustable to facilitate maintaining a prescribed hip or knee flexion position for the patient, without requiring manual assistance. Plaster fixation in the standard DDH frog-leg position ensures accurate concentric repositioning of the acetabulum and femoral head. Arthrography during surgery confirms the repositioning, promoting good post-operative hip joint development and recovery. This invention solves the problem of non-standard patient positioning during current DDH frog-leg position plaster fixation procedures, which fails to achieve hip joint repositioning and affects the plaster fixation effect.

[0007] To achieve the above-mentioned technical objectives, this utility model is implemented through the following technical solution:

[0008] A DDH frog-style plaster fixation auxiliary device includes: a strip, a sliding plate, a leg support plate, a foot support plate, foot pedals, and a support plate angle adjustment component;

[0009] A sliding disc is movably mounted on the strip;

[0010] The sliding disc is provided in two parts; a foot support plate is movably set on the front sliding disc via a support plate angle adjustment component; a leg support plate is movably set on the rear sliding disc via a support plate angle adjustment component.

[0011] Foot pedals are installed above the foot support plate.

[0012] Preferably, a through slot is provided in the middle of the sliding disk; the slot passes through the slot and the sliding disk is slidably mounted on the slot.

[0013] Preferably, the support plate angle adjustment component consists of several support plate slots arranged on both sides of the sliding plate; the inclination angle of the channel inside the support plate slot increases progressively; when the leg support plate or foot support plate is inserted into different support plate slots, the inclination angle of the leg support plate or foot support plate is different.

[0014] Preferably, the support plate angle adjustment assembly includes: a base cylinder, a rotating shaft, and a limiting structure;

[0015] The base cylinder is arranged on the left and right sides of the curved surface of the sliding disk; the side of the rotating shaft is concentrically rotatably connected to the side of the base cylinder through a shaft;

[0016] A limiting structure is provided between the rotating shaft and the base cylinder;

[0017] Foot support plates and leg support plates are provided on the curved surface of the rotating shaft.

[0018] Preferably, the limiting structure includes: a slot protrusion, a rod groove, a collar, and a rod;

[0019] The slot protrusion is set on the curved surface of the base cylinder, occupying 1 / 2 of the curved surface; the slot protrusion is provided with a rod groove inside, and the opening of the rod groove is located on the right side of the slot protrusion;

[0020] The collar is set on the curved surface of the rotating shaft, and the insert rod moves through the collar and is located inside the collar; after the rotating shaft drives the foot support plate or leg support plate to rotate to an appropriate tilt angle, the insert rod is inserted into the insert rod groove, locking the relative position between the rotating shaft and the base cylinder, and keeping the tilt angle of the foot support plate or leg support plate fixed.

[0021] Preferably, a limiting groove is provided on the upper rear surface of the strip; a limiting block is provided above the strip slot via a hinge; and a limiting protrusion is provided on the lower surface of the limiting block.

[0022] Preferably, the hinge is a detachable structure, comprising: a first component, a second component, a third component, and a spindle;

[0023] The hinge portions of the first and second components are disposed on the surface of the sliding disk; the hinge portion of the third component is disposed on the upper surface of the limiting block;

[0024] The third component is located between the first and second components, and the shaft tubes of the three components are concentrically connected; a core rod passes through the shaft tube in a detachable manner.

[0025] Preferably, a foot pedal support plate is horizontally arranged above the foot support plate, and the foot pedal is arranged on the foot pedal support plate.

[0026] Preferably, the front and rear ends of the strip are detachably provided with "H"-shaped bases; the strip is placed on top of the bases.

[0027] The beneficial effects of this utility model are:

[0028] The DDH frog-style plaster fixation device provided by this utility model is designed as a detachable and combinable structure; through the sliding plate on the strip and the foot support plate and leg support plate on the sliding plate, in conjunction with the foot pedal, it can be adjusted to a suitable hip flexion and knee flexion angle and maintained.

[0029] By adjusting the tilt angle of the leg support plate and foot support plate on the sliding plate, the optimal abduction angle of the hip joint can be adjusted and maintained; the frog-style plaster fixation device provided by this utility model can ensure the standard angle of the frog-style position and avoid errors caused by manual fixation and adjustment. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0032] Figure 2 This is a schematic diagram of the support plate slot type support plate angle adjustment component of this utility model;

[0033] Figure 3 This is a schematic diagram of the rotating shaft type support plate angle adjustment component of this utility model;

[0034] Figure 4 This is a schematic diagram of the position locking structure between the rotating shaft and the base cylinder of the rotating shaft type support plate angle adjustment component of this utility model;

[0035] Figure 5 This is a schematic diagram of the unrestricted position structure between the rotating shaft and the base cylinder of the rotating shaft type support plate angle adjustment component of this utility model;

[0036] Figure 6 This is a schematic diagram of the upper limit groove structure of the strip plate of this utility model;

[0037] Figure 7 This is a schematic diagram of the hinged hinge structure of this utility model.

[0038] In the attached diagram, the structural names represented by each number are as follows:

[0039] 1-Base, 2-Strip plate, 201-Limiting groove, 3-Sliding disc, 301-Strip plate slot, 4-Leg support plate, 5-Foot support plate, 501-Foot pedal support plate, 6-Foot pedal, 7-Support plate slot, 8-Limiting block, 801-Limiting protrusion, 802-Hinge joint, 8021-First component, 8022-Second component, 8023-Shaft core rod, 8024-Third component, 8025-Shaft tube, 9-Base cylinder, 901-Slot protrusion, 902-Insertion rod slot, 10-Rotating shaft, 1001-Insertion rod, 1002-Collar. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0041] Example 1

[0042] A DDH frog-style plaster fixation auxiliary device includes: a strip plate 2, a sliding plate 3, a leg support plate 4, a foot support plate 5, a foot pedal 6, and a support plate angle adjustment component;

[0043] like Figure 1 and Figure 2 As shown, a through slot 301 is horizontally arranged in the middle of the left and right sides of the sliding disc 3. The cross-section of the slot 301 is rectangular. The cross-section of the slot 2 is also rectangular. The entire slot 2 is a flat rectangular plate structure. This way, the patient will not feel a significant foreign body sensation in their back when lying flat on the slot, thus avoiding discomfort.

[0044] Two sliding discs 3 are provided. The strip 2 passes through the strip slot 301 through the sliding disc 3, so that the two sliding discs 3 can move freely on the strip 2, making it convenient to adjust the position of the two sliding discs 3 and the distance between the two sliding discs 3.

[0045] Foot support plates 5 are movably mounted on the front sliding disc 3 via a support plate angle adjustment component. One foot support plate 5 is positioned on each of the left and right sides of the curved surface of the sliding disc 3, with the two foot support plates 5 arranged symmetrically. Leg support plates 4 are movably mounted on the rear sliding disc 3 via a support plate angle adjustment component. One leg support plate 4 is positioned on each of the left and right sides of the curved surface of the sliding disc 3, with the two leg support plates symmetrically arranged. Figure 1 As shown, the "front side" mentioned above refers to the side closest to the right end of strip 2, and the "rear side" refers to the side closest to the left end of strip 2;

[0046] A foot pedal support plate 501 is horizontally installed above the foot support plate 5, and a foot pedal 6 is installed above the foot pedal support plate 501;

[0047] The patient lies supine on board 2, with their head on the left side of board 2, thighs against the leg supports 4 on both sides in an abducted position; feet are placed on footrests 6, resting against their surface; lower legs are suspended between the leg supports 4 and foot supports 5. The patient's knee flexion angle can be adjusted by changing the distance between the two sliding discs 3 on board 2, that is, the distance between the leg supports 4 and foot supports 5; the patient's hip flexion angle can be adjusted by keeping their upper body still and adjusting the sliding discs 3 connecting the leg supports 4.

[0048] The tilt angles of the leg support plate 4 and foot support plate 5 can be adjusted by using the support plate angle adjustment component on the sliding disc 3, thereby adjusting the abduction angle of the hip joint to the optimal angle.

[0049] like Figure 2 As shown, in this embodiment, the support plate angle adjustment component is set as several support plate slots 7 on the left and right sides of the curved surface of the sliding disk 3; the inclination angle of the channel inside the slot of the support plate slot 7 increases one by one; in this embodiment, four support plate slots 7 are provided, and the inclination angles of the channel inside the slots of the four support plate slots 7 are 60°, 70°, 80° and 90° from top to bottom, respectively; by inserting the leg support plate 4 and the foot support plate 5 into different support plate slots 7, the hip joint abduction angle can be adjusted to the corresponding appropriate angle position.

[0050] Example 2

[0051] Based on Embodiment 1, the angle adjustment component provided in Embodiment 1 adopts a slot structure. By setting several slot channels with different angles, the leg support plate 4 or foot support plate 5 can be detachably inserted into the support plate slot 7 to achieve the purpose of maintaining the corresponding tilt angle of the leg support plate 4 and foot support plate 5; the tilt angle of the leg support plate 4 and foot support plate 5 can be adjusted in this way.

[0052] However, the number of support plate slots 7 is limited, and the corresponding adjustment angle values ​​are also fixed and limited. In the actual process of adjusting the frog-like position, the optimal abduction angle of the hip joint may not be the pre-set tilt angle value, depending on the different body types and conditions of the patients. At this time, it will be impossible to fine-tune the hip abduction angle to the optimal angle according to different patients.

[0053] Therefore, as Figure 3 As shown, this embodiment will provide an angle adjustment component with more flexible angle adjustment. Based on this angle adjustment component, there are more angle adjustment options within an adjustment range, making the adjustment more flexible; it is convenient to adjust the hip abduction angle in the frog position to the optimal value or the closest value according to the patient's own situation.

[0054] like Figure 3 As shown, the support plate angle adjustment assembly in this embodiment includes: a base cylinder 9, a rotating shaft 10, and a limiting structure;

[0055] The base cylinder 9 is located on the left and right sides of the curved surface of the sliding disk 3, and the base cylinder 9 is fixedly connected to the curved surface of the sliding disk 3. A shaft is concentrically connected to the center of the right side of the rotating shaft 10, and a cylindrical slot corresponding to the shaft is opened at the center of the left side of the base cylinder 9. The shaft is rotatably placed in the cylindrical slot, allowing the rotating shaft 10 to rotate relative to the base cylinder 9. The foot support plate 5 and the leg support plate 4 are fixedly attached to the curved surface of the rotating shaft 10. The abduction angle of the hip joint is adjusted, that is, the foot support plate 5 and the leg support plate 4 are adjusted accordingly. The tilt angle of the leg support plate 4: Simply rotate the rotating shaft 10, and the leg support plate 4 and foot support plate 5 set on the rotating shaft 10 can be rotated together. Observe the tilt angle of the leg support plate 4 and foot support plate 5. When the optimal value is reached, stop rotating the rotating shaft 10 and maintain this angle. The relative position of the rotating shaft 10 with respect to the base cylinder 9 is locked by the limiting structure set between the rotating shaft 10 and the base cylinder 9, so that the rotating shaft 10 cannot be rotated. In this way, the tilt angle of the leg support plate 4 and foot support plate 5 can be kept fixed.

[0056] like Figure 4 and Figure 5 As shown, the limiting structure in this embodiment includes: slot protrusion 901, insertion rod groove 902, collar 1002, and insertion rod 1001;

[0057] The slot protrusion 901 is set on the curved surface of the base cylinder 9, occupying 1 / 2 of the curved surface; a rod slot 902 is set inside the slot protrusion 901, and the opening of the rod slot 902 is located on the right side of the slot protrusion 901.

[0058] A collar 1002 is provided on the curved surface of the rotating shaft 10. The insertion rod 1001 moves through the collar 1002 and is located inside the collar 1002. After the rotating shaft 10 drives the foot support plate 5 or the leg support plate 4 to rotate to the optimal tilt angle, the insertion rod 1001 is inserted into the insertion rod groove 902. At this time, the relative position between the rotating shaft 10 and the base cylinder 9 will be locked, which can keep the tilt angle of the foot support plate 5 or the leg support plate 4 fixed.

[0059] Example 3

[0060] Based on Embodiment 1, in Embodiment 1, the leg support plate 4 and foot support plate 5 set on the sliding disc 3 can rotate relative to the sliding disc 3, the purpose of which is to adjust the hip abduction angle of the patient in the frog position; while the sliding disc 3 can slide freely on the board 2, the purpose of which is to adjust the patient's hip flexion angle and knee flexion angle; by adjusting the distance between the two sliding discs 3, the patient's knee flexion angle can be adjusted; by keeping the patient's upper body still, adjusting the sliding disc 3 near the left end of the board 2 can adjust the patient's hip flexion angle.

[0061] In Example 1, there is no limiting structure between the sliding disc 3 and the strip 2. This means that the sliding disc 3 can be displaced on the strip 2 under any external force. This poses a problem in DDH frog-leg position plaster fixation. During the operation, the doctor may cause the sliding disc 3 to displace, which will change the originally adjusted hip or knee flexion angle during the operation, affecting the plaster fixation effect and potentially impacting the later hip joint recovery.

[0062] Therefore, as Figure 1 , Figure 2 , Figure 6 As shown, in this embodiment, a limiting groove 201 is provided on the upper surface of the strip plate 2 within the range of the sliding disk 3 on the rear side of the strip plate 2; a limiting block 8 is provided above the strip plate slot 301 via a hinged joint 802. When the limiting block 8 is in the natural falling position, the lower edge of the limiting block 8 is exactly flush with the upper edge of the strip plate slot 301; a limiting protrusion 801 is provided on the lower surface of the limiting block 8; when the limiting block 8 is in the natural falling position, the limiting protrusion 801 on the lower surface of the limiting block 8 is exactly located in the limiting groove 201 on the strip plate 2. Through the cooperation of the limiting protrusion 801 and the limiting groove 201, the sliding disk 3 is limited on the strip plate 2.

[0063] like Figure 7 As shown, the hinge joint 802 is configured as a detachable structure, including: a first component 8021, a second component 8022, a third component 8024, and a shaft core 8023;

[0064] The hinge portions of the first component 8021 and the second component 8022 are disposed on the surface of the sliding disk 3; the hinge portion of the third component 8024 is disposed on the upper surface of the limiting block 8;

[0065] The third component 8024 is located between the first component 8021 and the second component 8022. The shaft tubes 8025 of the three components are concentrically connected. A shaft core rod 8023 is detachably passed through the shaft tube 8025. The three components are assembled by the shaft core rod 8023, so that the hinged joint 802 can hinge the limiting block 8 above the strip slot 301.

[0066] Pulling the shaft core rod 8023 out of the shaft tube 8025 allows the third component 8024 to be separated from the first component 8021 and the second component 8022; at this time, the limiting block 8 can be removed from the sliding plate 3, allowing the sliding plate 3 to move freely.

[0067] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0068] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A DDH frog-style plaster fixation auxiliary device, characterized in that, include: Slides, gliding discs, leg supports, foot supports, foot pedals, and support angle adjustment components; A sliding disc is movably mounted on the strip; Two sliding discs are provided; The foot support plate is movable on the front sliding plate via the support plate angle adjustment component; The leg support plate is movable on the rear sliding plate via the support plate angle adjustment component; Foot pedals are installed above the foot support plate.

2. The DDH frog-style plaster fixation auxiliary device according to claim 1, characterized in that, A through slot is provided horizontally in the middle of the sliding disk; the slab passes through the slot and the sliding disk is slidably mounted on the slab.

3. The DDH frog-position plaster fixation auxiliary device according to claim 1, characterized in that, The support plate angle adjustment component consists of several support plate slots located on both sides of the sliding plate; the inclination angle of the channel inside the support plate slot increases progressively; the leg support plate or foot support plate is detachably inserted into the support plate slot.

4. The DDH frog-style plaster fixation auxiliary device according to claim 1, characterized in that, The support plate angle adjustment assembly includes: a base cylinder, a rotating shaft, and a limiting structure; The base cylinder is arranged on the left and right sides of the curved surface of the sliding disk; the side of the rotating shaft is concentrically rotatably connected to the side of the base cylinder through a shaft; A limiting structure is provided between the rotating shaft and the base cylinder; Foot support plates and leg support plates are provided on the curved surface of the rotating shaft.

5. The DDH frog-style plaster fixation auxiliary device according to claim 4, characterized in that, The limiting structure includes: a slot protrusion, a rod groove, a collar, and a rod; The slot protrusion is set on the curved surface of the base cylinder, occupying 1 / 2 of the curved surface; the slot protrusion is provided with a rod groove inside, and the opening of the rod groove is located on the right side of the slot protrusion; The collar is set on the curved surface of the rotating shaft, and the insert rod moves through the collar and is located inside the collar.

6. The DDH frog-position plaster fixation auxiliary device according to claim 1, characterized in that, A limiting groove is provided on the upper rear surface of the strip; a limiting block is provided above the strip slot via a hinge; a limiting protrusion is provided on the lower surface of the limiting block.

7. The DDH frog-style plaster fixation auxiliary device according to claim 6, characterized in that, The hinge is a detachable structure, comprising: a first component, a second component, a third component, and a spindle; The hinge portions of the first and second components are disposed on the surface of the sliding disk; the hinge portion of the third component is disposed on the upper surface of the limiting block; The third component is located between the first and second components, and the shaft tubes of the three components are concentrically connected; a core rod passes through the shaft tube in a detachable manner.

8. The DDH frog-style plaster fixation auxiliary device according to claim 1, characterized in that, A foot pedal support plate is horizontally arranged above the foot support plate, and the foot pedal is arranged on the foot pedal support plate.

9. The DDH frog-style plaster fixation auxiliary device according to claim 1, characterized in that, The front and rear ends of the strip are detachably equipped with "H"-shaped bases; the strip is placed on top of the bases.

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