Cross-Strap Wearable Bottom Garment for Hip Dislocation Prevention
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Solution Overview
Problem
Existing methods for preventing hip dislocation in children with cerebral palsy, such as fixing bars and compression chairs, either fail to effectively prevent dislocation or cause discomfort, and there is a lack of evidence supporting their efficacy.
Innovation Solution
A wearable bottom garment with first and second straps extending from the upper to lower sides of the left and right hip joints, applying pressure to surround and stabilize the hip joints, optionally with adjustable lengths and attachment points, and incorporating a sensor and compression system to detect and respond to leg movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a fixing bar is inserted between the leg bones to resist the inward force, then the force bringing the leg bone inward is resisted, but the rotational moment increases around the fixing bar position, promoting hip joint dislocation
Solution Approach 1:
The patent removes the fixing bar from between the leg bones and replaces it with straps that apply pressure directly to the hip joint area. This extracts the harmful rotational moment generation while maintaining the function of preventing inward displacement of the leg bones through direct hip joint stabilization.
Solution Approach 2:
The patent introduces straps as an intermediary element that applies pressure to the hip joint region rather than placing a rigid bar between the legs. This intermediary approach provides stabilization without creating the lever arm that generates harmful rotational moments around the hip joint.
2Stability of the object's composition
If compression chairs and correction devices are used to prevent hip dislocation, then hip joint stability is improved, but the devices can only be used in designated spaces and cause discomfort
Solution Approach 1:
The patent transitions from static compression chairs to dynamic wearable straps that can adapt to the child's movements. The straps maintain hip joint stability while allowing natural movement and can be worn continuously, providing both stability and ease of operation through their flexible, adaptable design.
Solution Approach 2:
The patent uses flexible straps instead of rigid compression chairs. These thin, flexible elements can conform to the body's contours and movements, providing hip joint stabilization without the bulk and discomfort of traditional devices, enabling continuous wear in any setting.
3Reliability
If conventional devices are used to prevent hip dislocation, then some stabilization is achieved, but there is insufficient evidence for preventing hip dislocation and children experience discomfort
Solution Approach 1:
The patent changes the pressure application parameters from diffuse compression to focused localized pressure on the hip joint area. This parameter change improves dislocation prevention efficacy by directly stabilizing the joint while reducing discomfort through precise, targeted pressure rather than broad compression.
Data Source
AI summary
A wearable bottom garment for preventing hip dislocation includes a first strap extending from the upper side of the left hip joint to the lower side of the right hip joint, and a second strap extending from the upper side of the right hip joint to the lower side of the left hip joint, wherein the first strap presses the upper side of the left hip joint from top to bottom, and presses the lower side of the right hip joint from bottom to top, and the second strap presses the upper side of the right hip joint from top to bottom, and presses the lower side of the left hip joint from bottom to top.