label: Positive O'Brien active compression test
label_lc: positive o'brien active compression test
description: Pain in shoulder reproduced when examiner applies downward pressure on the arm while patient resists pressure in the following position: elbow extended, shoulder forward flexed to 90 degrees and 10-15 degrees adducted with palm facing down. This can be compared to the same position but with the palm facing up which should be less painful.