Defining high activity in arthroplasty patients.

摘要: There is evidence that high levels of physical activity following arthroplasty the hip or knee can lead to early revision. However, term 'highly active' not well defined. A validated ankle accelerometer was used quantify in 13 patients, who had undergone a total 20 arthroplasties lower limbs and active lifestyles. The assessments were taken at mean 8.7 years post-operatively (1.8 15.8). gait cycles per day 8273 (5964 12,557), which extrapolates 3.0 million year (cpy) (2.2 4.6). percentage time spent mode 4.3%, about one hour day. 40%. Based on these data, we propose definitions activity: > 3 cpy; mode; 40% mode. Extrapolating sample over since operation, 25.2 million, with maximum 44.1 million. No joint has been revised, shows impending failure.