Edmund M. Kosmahl, PT, EdD
GONIOMETRY WEB SITE
POSITIONING AND STABILIZATION
a. Start with joint at zero position - This is the reference point
for the measurement. If zero position can't be achieved, this must be documented.
b. permit complete range of motion
1) If you are assessing joint ROM, be sure that some other structure
(eg. a tight muscle) doesn't interfere.
2) If you are assessing some other structure (eg. a tight muscle, pain
limiting the motion) document exactly what is limiting the range of motion.
(eg. hamstring tightness at 65o of hip flexion)
a. Poor stabilization is the most frequent cause of invlaid measurements.
(eg. observe a "normal" ROM of elbow extension when movement of shoulder
and arm masks a limitation - actually measuring shoulder and arm movement)
Poor Stabilization for Elbow Extension
b. usually stabilize proximal joint components
c. promote patient relaxation so voluntary muscle contraction doesn't
copyright 1999 E. Kosmahl