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[Computerized tomography measurement of humerus torsion]
C C Fuchs1, P Schmid, P Engelhardt
1Institut für Diagnostische Radiologie, Kantonsspital, St. Gallen.
Zeitschrift Fur Orthopadie Und Ihre Grenzgebiete
|September 1, 1991
Summary
Computerised axial tomography can measure humeral torsion in living individuals. Mean torsion is 62.8 degrees, with a wide range suitable for contralateral side comparison in surgical planning.
Area of Science:
- Orthopedic surgery
- Radiology
- Anatomy
Background:
- Accurate measurement of humeral torsion is crucial for diagnosing and treating shoulder conditions.
- Previous methods for determining humeral torsion have limitations in clinical settings.
Purpose of the Study:
- To establish a reliable method for measuring the angle of humeral torsion in living subjects using computerised axial tomography.
- To provide normative data for humeral torsion angles in a control population.
Main Methods:
- Utilized computerised axial tomography (CT) scans of the humerus in 28 healthy control subjects.
- Arms were immobilized on a rigid board to ensure accurate transverse scanning through proximal and distal humerus ends.
Main Results:
- The mean angle of humeral torsion was determined to be 62.8 degrees.
- A wide range of torsion angles was observed, from 42 degrees to 82 degrees (40-degree spread).
- These results align with previously reported findings by other researchers.
Conclusions:
- Computerised axial tomography provides a viable method for assessing humeral torsion in vivo.
- The significant variability in measured angles supports the clinical use of contralateral side comparison for preoperative planning in orthopedic surgery.