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[Thoughts on the so-called "radius-capitellum axis" (author's transl)]
Rofo : Fortschritte Auf Dem Gebiete Der Rontgenstrahlen Und Der Nuklearmedizin
|February 1, 1982
Summary
The radius-capitellum axis is often normal even with elbow joint deviation. This study in 438 patients shows axis deviation doesn't always indicate humero-radial joint abnormality.
Area of Science:
- Orthopedic Surgery
- Radiology
- Human Anatomy
Background:
- The radius-capitellum axis is a radiological landmark used to assess elbow joint alignment.
- Abnormalities in this axis are often presumed to indicate humero-radial joint pathology.
Purpose of the Study:
- To investigate the reliability of the radius-capitellum axis in diagnosing humero-radial joint abnormalities.
- To determine the prevalence of variations in the radius-capitellum axis in a normal elbow population.
Main Methods:
- Radiological assessment of 438 patients.
- Observation and analysis of the radius-capitellum axis in each patient.
- Correlation of axis position with elbow joint normality.
Main Results:
- In approximately 25% of individuals with normal elbows, the radius-capitellum axis passes lateral to the capitellum.
- Marked deviation of the axis does not definitively confirm humero-radial joint abnormality.
- Observed deviations can result from anatomical changes or joint capsule distension.
Conclusions:
- The radius-capitellum axis is not a definitive indicator of humero-radial joint abnormality.
- Variations in capitellum or radius shape, joint capsule distension, and muscular pull can all influence axis position.
- Radiological interpretation must consider these variations to avoid misdiagnosis.