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Radiographic verification of knee goniometry
Scandinavian Journal of Rehabilitation Medicine
|January 1, 1986
Summary
Knee goniometry measurements can be inaccurate within the first 15 degrees of flexion. Beyond 30 degrees, goniometry accurately reflects knee joint motion compared to radiographic measurements.
Area of Science:
- Orthopedics
- Biomechanics
- Medical Measurement
Background:
- Knee goniometry is a common method for assessing joint range of motion.
- Accurate measurement of knee flexion is crucial for evaluating treatment efficacy and surgical outcomes.
Purpose of the Study:
- To evaluate the accuracy of goniometric measurements of knee flexion compared to radiographic bone angle measurements.
- To identify specific ranges of knee flexion where goniometry may be inaccurate.
Main Methods:
- Knee joint angles were measured using goniometry and compared with radiographic bone angle measurements.
- Measurements were taken at six specific knee positions: 0, 15, 30, 45, 60, and 90 degrees of flexion.
Main Results:
- Goniometric measurements significantly differed from radiographic measurements within the initial 15 degrees of knee flexion (p < 0.01).
- No significant differences were observed between goniometric and radiographic measurements at 30 degrees of knee flexion or greater.
Conclusions:
- Goniometric assessment of knee joint excursion can be inaccurate within the first 15 degrees of flexion.
- Caution is advised when interpreting small gains or losses in range of motion within the initial 15 degrees of knee flexion, especially in cases of limited knee mobility.