Posterior longitudinal scan of the elbow
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The patient sits with the arm in the crab position, shoulder abducted, elbow flexed at 90o and palm placed on table. The probe is placed longitudinally with the distal end over the tip of the olecranon.
Skin, subcutaneous fat, triceps muscle and tendon, olecranon fossa and fat pad, olecranon and trochlea of the lower end of the humerus are visualised. The probe is moved proximally to examine the olecranon fossa more completely.