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Loads in hip disarticulation prostheses during normal daily use
M Nietert1, N Englisch, P Kreil
1Department of Hospital and Biomedical Engineering - Environmental and Biotechnology, Fachhhochschule Giessen-Friedberg/University of Applied Sciences, Giessen, Germany. manfred.nietert@tg.fh-giessen.de
Prosthetics and Orthotics International
|January 9, 1999
Summary
Hip disarticulation prostheses experience varied stresses due to patient weight and activity. This study measured real-world loads on these devices during daily activities to inform better design and testing standards for lower limb prostheses.
Area of Science:
- Biomechanics
- Prosthetics Engineering
- Rehabilitation Technology
Background:
- Individuals with hip disarticulation require assistive devices for mobility.
- Existing prostheses face diverse stresses from users of varying weights and activity levels.
- Current European and International Standards (prEN 12523, ISO 10328, ISO/FDIS 15032) outline strength requirements for lower limb and hip prostheses.
Purpose of the Study:
- To acquire load data generated in hip units of hip disarticulation prostheses during diverse real-life activities.
- To inform the development of more accurate and relevant testing protocols for lower limb prostheses.
- To ensure prosthetic devices can withstand the stresses encountered in everyday use.
Main Methods:
- Measurements of loads induced in hip units of hip disarticulation prostheses.
- Testing conducted on over 30 amputee patients across Germany, France, and Belgium.
- Data acquisition during various everyday activities, including walking on different surfaces.
Main Results:
- Quantified the actual stresses experienced by hip disarticulation prostheses during patient locomotion.
- Provided empirical data on loads generated during activities like level walking, grass walking, and uneven surface ambulation.
- Established a foundation for refining strength requirements and test methods for lower limb prostheses.
Conclusions:
- Real-world load measurements are crucial for validating the strength and safety of hip disarticulation prostheses.
- The findings support the need for testing prostheses under conditions that accurately reflect daily usage stresses.
- This research contributes to improving the design and standardization of lower limb prosthetic devices for enhanced patient mobility and safety.