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A portable, real-time, clinical gait velocity analysis system
1Northwestern University Rehabilitation Engineering Research Center and Prosthetics Research Laboratory, Chicago, IL 60611, USA.
IEEE Transactions on Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society
|January 9, 1998
Summary
A new direct ultrasound ranging system (DURS) accurately measures gait velocity in real-time. This system provides detailed gait velocigrams (GVG) for quantitative analysis of walking parameters and deviations.
Area of Science:
- Biomechanics
- Medical instrumentation
- Rehabilitation engineering
Background:
- Quantitative gait analysis is crucial for diagnosing and monitoring various medical conditions.
- Existing gait evaluation methods may have limitations in real-time data acquisition and accuracy.
Purpose of the Study:
- To develop and evaluate a direct ultrasound ranging system (DURS) for precise, real-time measurement of gait velocity.
- To assess the system's capability in calculating key gait parameters and identifying deviations.
Main Methods:
- A direct ultrasound ranging system (DURS) was developed, comprising a subject-worn transponder and a base unit with IR emitter/US receiver.
- Subjects walked away from the base unit, with forward progression tracked and displayed in real-time.
- Instantaneous velocity profiles (gait velocigrams - GVG) were generated for each trial.
Main Results:
- The DURS system provides real-time display of subject's forward progression.
- Gait velocigrams (GVG) allowed for calculation of parameters including gait speed, cadence, step length, and step time.
- The system effectively displayed gait deviations and time to achieve steady-state walking.
Conclusions:
- The direct ultrasound ranging system (DURS) offers a viable method for quantitative gait velocity evaluation.
- The system facilitates real-time gait analysis, providing valuable data for clinical and research applications.
- Gait velocigrams (GVG) derived from DURS are useful for identifying gait abnormalities and assessing walking stability.