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Related Experiment Videos

Comparison between two devices for measuring hip joint motions

S M Bierma-Zeinstra1, A M Bohnen, R Ramlal

  • 1Department of General Practice, Erasmus University Rotterdam, The Netherlands.

Clinical Rehabilitation
|December 30, 1998
PubMed
Summary

The electronic inclinometer offers more reliable hip rotation measurements than the two-arm goniometer. While both instruments are equally accurate for general hip movements, they are not interchangeable across different body positions.

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Area of Science:

  • Biomechanics
  • Kinesiology
  • Rehabilitation Medicine

Background:

  • Accurate measurement of hip joint motion is crucial for diagnosing conditions and evaluating treatment effectiveness.
  • Traditional goniometers and newer electronic inclinometers are commonly used, but their comparative reliability is not fully established.

Purpose of the Study:

  • To compare the measurement reliability of an electronic inclinometer and a two-arm goniometer for hip motions.
  • To assess the influence of different body positions on measurement consistency.

Main Methods:

  • Simultaneous measurement of maximal active and passive hip movements using both instruments.
  • Ten consecutive measurements were performed on nine subjects at short intervals.

Main Results:

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  • The inclinometer demonstrated lower intra-observer variability for passive hip rotations and lower inter-observer variability for active internal rotation.
  • Both instruments showed similar intra-observer variability for general hip movements.
  • Differences in measured ranges were observed: the goniometer measured more rotation, while the inclinometer measured more extension and flexion.
  • Prone positioning yielded greater rotational measurements compared to sitting or supine positions.

Conclusions:

  • The electronic inclinometer is superior for measuring hip rotation reliability.
  • For general hip movements, the two-arm goniometer is equally accurate when used by a single observer.
  • Measurement consistency is affected by the instrument and body position, indicating they are not interchangeable.