Three-dimensional Measurement of Range of Motion(ROM) of the Hip Joint.

概要

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We designed a new method to assess the three-dimensional "combined" range of motion (ROM) of the hip joint, which the conventional method of measuring ROM (that is, flexion, extension, abduction, adduction, external rotation and internal rotation) could not reveal. The new method expresses ROM by the movement of the distal end of the femur on the sphere, whose center is the femoral head, with a radius of the length of the femur. In the lateral decubitus position with the peldius of the patient fixed in a special device, the hip joint was passively circumducted and the trail of the end of the femur was recorded by the three-dimensional gait analysis system, Locus III D (Anima, Tokyo). This method reveals changes in the pattern of ROMs in abnormal hip joints, and is thought to be helpful for studying pathogenesis, determining surgical treatment and assessing the result of treatment.
西日本整形・災害外科学会の論文