The function of the Thomas splint. An experimental study.

A Thomas splint of traditional design was fitted with measuring devices and examined for its hip-relieving effect during varying activities. It was shown that there is no complete weight relief of the hip joint with this orthosis. In the most favourable case, 50% of the weight can be conducted via the ischial tuberosity and therefore transferred to the ground surface bypassing the hip joint. In regard to the hip joint, the Thomas splint is a device that reduces weight but does not entirely remove it. The results proved to be practically independent of the fitting of the orthosis and of the kind of activity.