Hip joint internal and external rotation gauge - with precise, easily reproducible measurements in numerical measuring units uses vertical protractor on board

摘要

The patient lies on his stomach with hip joints extended and knees bent at right angles so that the lower legs point upwards with the knees resting on pads (14, 15) on either side of a narrow dividing wall (3) which rises perpendicularly from the horizontal support surface (1). Each side of the dividing wall is equipped with a measuring strip (4, 5) which pivots between the wall and the support surface and is as long as the lower leg from the knee to the ankle and is equipped with an indicator (8, 9) which can be read off on the scale (10, 11) which is arranged perpendicular to the surface (1) with the zero point determined by the edge of the dividing wall (3).