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A pressure and shear sensing liner for prosthetic sockets
Summary
Researchers developed a new prosthetic liner with integrated sensors to measure interface pressures and shear stresses. This innovation aims to improve prosthetic socket comfort and fit by providing crucial in-situ load data.
Area of Science:
- Biomedical Engineering
- Prosthetics and Orthotics
- Rehabilitation Engineering
Background:
- Prosthetic socket comfort and fit are critical for lower-limb amputees.
- Interface pressures, particularly shear stresses, offer key insights into prosthetic fit.
- Measuring these in-situ stresses has been a significant challenge.
Purpose of the Study:
- To develop and test an innovative elastomeric liner for lower-limb prosthetics.
- To integrate sixteen pressure and shear sensors for in-situ load monitoring.
- To assess the feasibility of measuring three-axis pressures and shear stresses within the socket/liner interface.
Main Methods:
- Developed an elastomeric liner with properties similar to clinical standards.
- Integrated sixteen optical pressure and shear sensors with data acquisition electronics.
- Tested the sensor-equipped liner on a single amputee subject during sit/stand/walk activities.
Main Results:
- Successfully integrated pressure and shear sensors into a functional prosthetic liner.
- Demonstrated the capability of the system to measure three-axis pressures.
- Collected in-situ interface load data during various functional activities.
Conclusions:
- The developed sensor-integrated liner shows promise for monitoring prosthetic socket interface loads.
- This technology can provide valuable data for improving prosthetic fit and comfort.
- Further research and testing are warranted to validate clinical applicability.
