ABSTRACT
Female patients under 45 years of age (average, 32.5; range, 14-44) at the time of primary bipolar or total hip arthroplasty (THA) were surveyed an average 10.5 years (range, 1.7 to 20.3 years) after the index procedure. Most patients were satisfied with the pain relief and functional abilities. Of the 109 respondents (137 hips), 37 (34%) had undergone 50 additional hip procedures. Thirteen women (12%) had 19 children at an average of 3 years after hip arthroplasty. Seven women had 1 child each; 6 had 2 children; and 1 had dizygotic twins. Eleven infants were delivered vaginally and 8 by cesarean section (5 planned, 3 unplanned). Two pregnancies were considered high risk unrelated to the hip arthroplasty. Pregnancy-related complications for these patients did not differ from those in the general population.
Subject(s)
Arthroplasty, Replacement, Hip , Pregnancy Rate , Pregnancy/statistics & numerical data , Adolescent , Adult , Female , Humans , Incidence , Joint Diseases/surgery , Patient Satisfaction , Recovery of Function , Risk Factors , Treatment OutcomeABSTRACT
To assess factors that limit human muscle strength and growth, we examined the relationship between performance and body dimensions in the world weightlifting champions of 1993-1997. Weight lifted varied almost exactly with height squared (Ht(2.16)), suggesting that muscle mass scaled almost exactly with height cubed (Ht(3.16)) and that muscle cross-sectional area was closely correlated with body height, possibly because height and the numbers of muscle fibers in cross section are determined by a common factor during maturation. Further height limitations of muscle strength were shown by only one male champion >/=183 cm and no female champions >/=175 cm. The ratio of weight lifted to mean body cross-sectional area was approximately constant for body-weight classes
