Deterioration of position sense at the hip joint following total hip arthroplasty : A prospective time course study

概要

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The purpose of this study was to clarify the effects of total hip arthroplasty on joint position sense at the hip. Firstly, 17 cases of postoperative dislocation were investigated retrospectively. The postoperative dislocation was classified as early or late depending on the interval after surgery. All cases (7/7) of late dislocation were clearly aware of their leg position at dislocation, while 40% cases (4/10) of early dislocation could explain their leg position at dislocation precisely. Secondly, 108 patients who had THA were investigated prospectively to clarify whether joint position sense at the hip was restored at 4 weeks after surgery. Using a goniometer for the hip, the patients' hips were passively rotated in the chair sitting position and rotation angles were measured every week when they detected as rotationally neutral (0° ). As a result, a significant shift to the internally rotated position was observed between the first 1 to 2 weeks and the next 3 to 4 weeks (p<0.01〜p<0.05). There was no significant relation between the detected angle and either their age or amount of leg lengthening. These results may suggest that intensive care should be taken for early dislocation especially during 2 weeks postoperatively.
神戸大学の論文
2004-03-25