2007 Volume 27 Issue 2 Pages 2_3-2_14
This study aimed to obtain guidelines for patient education by clarifying characteristics of dislocation aversion movements (DAM) in daily life for patients after total hip arthroplasty (THA). Two movements, “wearing pants” and “picking up objects from the floor” were chosen as representative examples of movements to prevent dislocation, and these movements were analyzed for 6 THA patients and 5 healthy volunteers using 3-dimensional movement analysis and 3-dimensional acceleration instrumentation to extract differences.
Movement analysis demonstrated that adduction with hyperflexion of hip joints and forward tilting of trunk were usually seen in normal individuals, whereas restriction of flexion, abduction with hyperflexion of the implanted hip joint and backward tilting of trunk were commonly seen as DAM in THA patients. Furthermore, accelerated velocity of each movement was controlled at a low level for THA patients using some devices expanding their DAM as compared to that for normal individuals. In conclusion, characteristics of dislocation aversion movements do exist in THA patients and differ between patients, suggesting a necessity for learning systems for each patient by understanding living habits and activities of daily living.
