title: Energy balance in elderly patients after surgery for a femoral neck fracture.
abstract: To study energy and protein balances in elderly patients after surgery, spontaneous energy and protein intake and resting energy expenditure (REE) were measured in 20 elderly female patients with a femoral neck fracture (mean age 81 +/- 4, SD, range 74-87 years; weight 53 +/- 8, range 42-68 kg) during a 5-6 day period following surgery. REE, measured over 20-40 min by indirect calorimetry using a ventilated canopy, averaged 0.98 +/- 0.15 kcal/min on day 3 and decreased to 0.93 +/- 0.15 kcal/min on day 8-9 postsurgery (p less than 0.02). REE was positively correlated with body weight (r = 0.69, p less than 0.005). Mean REE extrapolated to 24 hr (24-REE) was 1283 +/- 194 kcal/day. Mean daily food energy intake measured over the 5-day follow-up period was 1097 +/- 333 kcal/day and was positively correlated with 24-REE (r = 0.50, p less than 0.05). Daily energy balance was -235 +/- 351 kcal/day on day 3 (p less than 0.01 vs zero) and -13 +/- 392 kcal/day on day 8-9 postsurgery (NS vs zero) with a mean over the study period of -185 +/- 289 kcal/day (p less than 0.01 vs zero). When an extra 100 kcal/day was allowed for the energy cost of physical activity, mean daily energy balance over the 5-day study period was calculated to be -285 +/- 289 kcal/day (p less than 0.01 vs zero). Measurements of total 24-hr urinary nitrogen (N) excretion were obtained in a subgroup of 14 patients.(ABSTRACT TRUNCATED AT 250 WORDS)
authors: Division d'Endocrinologie et Biochimie Clinique, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland.
authors: D
authors: D
authors: Jallut
authors: L
authors: L
authors: Tappy
authors: M
authors: M
authors: Kohut
authors: D
authors: D
authors: Bloesch
authors: R
authors: R
authors: Munger
authors: Y
authors: Y
authors: Schutz
authors: R
authors: R
authors: Chiolero
authors: J P
authors: JP
authors: Felber
authors: J J
authors: JJ
authors: Livio
authors: E
authors: E
authors: Jéquier
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001481:Basal Metabolism; D002151:Calorimetry; D004044:Dietary Proteins / Q000008:administration & dosage*; D004435:Eating; D002149:Energy Intake; D004734:Energy Metabolism; D005260:Female; D005265:Femoral Neck Fractures / Q000378:metabolism / Q000601:surgery*; D006801:Humans
chemical_list: D004044:Dietary Proteins