CTによる変形性股関節症における筋萎縮の定量的解析

抄録

Twenty normal hips and 30 cases of the unilateral osteoarthritic hips were examined by computed tomography in order to measure the atrophy of the muscles around the hip. We discussed the relationspip among the muscle atrophy, stages of the osteoarthritic hip, and the clinical score of the JOA's criteria.
The results were as follows:
1. There is no difference between the muscle volume of both sides in normal hips.
2. Atrophy of the gluteus maximus and the gluteus medius were already observed at the preosteoarthritic stage and the gluteus minimus, the tensor fasciae latae, iliopsoas revealed atrophy at the late stage.
3. There was a nagative correlation between the percentage of atrophy of the gluteus maximus and the clinical score of the JOA's criteria.
4. In cases of normal position of the greater trochanter, artophy of the gluteus medius was more distinguished in cases of abductors of grade 4 by MMT than in those of normal grade.