Adjustable Prosthetic Socket Panels for Residuum Size Changes
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Solution Overview
Problem
Conventional prosthetic devices face challenges in maintaining a comfortable and secure fit due to fluctuations in the size of the residual limb, leading to discomfort and the need for frequent adjustments with additional socks, which can cause pressure sores and sweating.
Innovation Solution
An adjustable prosthetic system featuring a socket with movable panels and tensioning lines that can be incrementally tightened using a ratcheting mechanism, allowing for customized fit adjustments without the need for additional socks, thereby maintaining a secure and comfortable fit throughout the day.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional prosthetic devices use a fixed-size socket, then the structure is simple and manufacturing is easy, but the device cannot accommodate daily fluctuations in residuum size leading to discomfort and pressure sores
Solution Approach 1:
The socket is divided into multiple adjustable panels that can be independently moved to accommodate changes in residuum size. Each panel can be adjusted separately, allowing the socket to adapt to varying limb dimensions without requiring a complete redesign of the entire socket structure.
Solution Approach 2:
The socket incorporates movable panels that can dynamically adjust their position and orientation based on the residuum's size fluctuations. This dynamic adjustment capability allows the prosthetic device to adapt to changing conditions throughout the day, maintaining comfort and fit without requiring multiple separate devices.
2Adaptability or versatility
If users wear multiple socks to accommodate size changes, then the fit can be adjusted, but pressure sores and discomfort increase
Solution Approach 1:
By segmenting the socket into adjustable panels rather than relying on multiple layers of socks, the system provides fit adjustment through structural modification rather than adding bulk. This eliminates the pressure points created by multiple sock layers while maintaining the ability to accommodate size changes.
Solution Approach 2:
The adjustable panel system allows users to self-adjust the socket fit by moving individual panels, eliminating the need for external assistance or additional materials like socks. The system serves itself by providing the adjustment mechanism directly within the socket structure.
3Reliability
If conventional sockets require frequent adjustments, then the fit can be maintained, but the user experience deteriorates due to frequent interruptions
Solution Approach 1:
The adjustable panels are pre-configured to accommodate a range of residuum sizes, allowing users to make minor adjustments as needed rather than requiring frequent complete re-adjustments. The system is prepared in advance to handle size fluctuations within its adjustable range, reducing the frequency and intensity of user interventions.
Data Source
AI summary
Prosthesis devices can include sockets having adjustable features. In one example, a socket includes one or more panels that can move outwardly or inwardly relative to a receptacle portion of the socket. The panels can be moved by tightening a tensioning line.