Hip Joint Therapeutic Device for Gradual Repositioning
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Solution Overview
Problem
Current treatments for developmental dysplasia of the hip, such as manual reposition and gypsum fixation, require repetitive anesthesia, cause joint stiffness, and lead to arrested development and instability due to long-term fixation.
Innovation Solution
A therapeutic device with a square-shaped back cover, chest-abdomen fastener band, wing-shaped supporting bars, limb fixing bars, telescopic screws, and hip joint adjusters for slow, gradual repositioning and stabilization of the hip joint, eliminating the need for repetitive anesthesia and gypsum fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual reposition and gypsum fixation are used, then hip joint repositioning can be achieved, but repetitive anesthesia and multiple surgeries are required
Solution Approach 1:
The device performs preliminary gradual stretching and positioning of the hip joint before final stabilization is needed. The slow stretching mechanism progressively separates the femoral head from the acetabulum, preparing the joint for repositioning without requiring immediate surgical intervention, thereby reducing the need for repetitive anesthesia and surgeries.
Solution Approach 2:
The device introduces an intermediary mechanical system between the patient's hip joint and the external environment. This intermediary device provides continuous gradual stretching force through screws and adjustable mechanisms, mediating the repositioning process without requiring direct manual manipulation or repeated surgical procedures.
2Stability of the object's composition
If long term gypsum fixation is used, then hip joint stability is maintained, but joint stiffness and arrested development occur
Solution Approach 1:
The device transforms the static, fixed gypsum fixation into a dynamic, adjustable system. The gradual stretching screws and movable components allow continuous micro-adjustments in hip joint positioning, enabling the joint to maintain stability while experiencing controlled movement that prevents stiffness and promotes continued development.
Solution Approach 2:
The device implements periodic adjustment cycles where the stretching force is applied gradually over time, then paused for observation and measurement. This periodic action pattern allows the joint to adapt and develop while maintaining stability, avoiding the continuous rigid fixation that causes stiffness.
3Reliability
If repetitive reduction and gypsum fixation are performed, then hip joint repositioning is achieved, but developmental imbalance occurs
Solution Approach 1:
The device performs preliminary gradual stretching to separate the femoral head from the acetabulum before final repositioning. This preliminary action prepares the surrounding soft tissues and joint structures for repositioning, reducing the need for repetitive manual reduction procedures that cause developmental imbalance.
Solution Approach 2:
The device systematically changes physical parameters such as stretching force magnitude, application duration, and directional vectors through adjustable screws and mechanisms. These controlled parameter changes enable progressive joint separation and repositioning while maintaining developmental balance, avoiding the abrupt force changes in repetitive manual reduction.
4Duration of action of stationary object
If frog gypsum is worn for nine months, then hip joint position is maintained, but gypsum becomes soft and requires replacement
Solution Approach 1:
The device replaces the static gypsum structure with a dynamic adjustable mechanism. The gradual stretching screws and movable components can be adjusted and tightened over time to maintain fixation reliability as the patient grows, eliminating the need to replace the entire fixation device every three months.
Solution Approach 2:
The device incorporates preliminary adjustment mechanisms that anticipate growth and loosening. The adjustable components are designed to be progressively tightened or repositioned during the wear period, maintaining effective fixation without requiring premature replacement due to softening or loosening.
Data Source
AI summary
A therapeutic device for slowly stretching a three-dimensional hip joint for reposition movement, where a chest-abdomen fastener fixing band (2) is fixed to a back cover (1); a shoulder fastener suspension band (3) is fixed to the back cover (1) and the chest-abdomen fastener fixing band (2); a pair of wing-shaped supporting bars (5) is fixed to the back cover (1); a pair of limb fixing bars (6) is connected to telescopic ends of a pair of hip joint forward-backward movement adjusters (9), and the pair of hip joint forward-backward movement adjusters (9) are fixed to the back cover (1); upward-downward lifting chute screws (4) are connected to hooks of the pair of wing-shaped supporting bars (5) and the limb fixing bars (6); and an inward-outward telescopic screw (8) is connected between the pair of limb fixing bars (6) which are provided with limb fastener fixing bands (7).