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[Inter- and intraobserver reliability in Graf's sonographic hip examination].
A K Hell1, J C Becker, O Rühmann
1Orthopädische Klinik, Universitätsklinik Göttingen. anna.hell@med.uni-goettingen.de
Zeitschrift Fur Orthopadie Und Unfallchirurgie
|October 11, 2008
Summary
Graf
Area of Science:
- Orthopedics
- Medical Imaging
Background:
- Graf's method is a standard for hip ultrasound.
- Assessing reliability and learning curves is crucial for standardized training.
Purpose of the Study:
- Evaluate inter- and intraobserver reliability of Graf's hip ultrasound method.
- Analyze the learning curve associated with Graf's method training.
Main Methods:
- 189 participants in Graf's hip ultrasound courses (basic, advanced, final) were surveyed.
- Participants measured 34 normal and pathological hip sonograms.
- Measurement differences and learning curves were analyzed across course levels.
Main Results:
- Significant improvement in average angle measurement from basic to advanced courses (p=0.001).
- No further improvement in the final course; higher variability in beta-angle measurements.
- Poorer quality scans and pathological hips showed greater measurement differences.
Conclusions:
- High variability in Graf's hip ultrasound measurements exists, particularly for beta-angle and pathological hips.
- Consistent practice between courses significantly improves measurement accuracy.
- Training should emphasize common errors and encourage extensive practical experience.
