title: [Variations of body composition by bioelectric impedancemetry after major surgery].
abstract: Body water variations are traditionally measured postoperatively by fluid balance and body weight. Bioelectrical impedance assessment permits the evaluation of body composition, i.e., lean body mass, body fat and total body water. We compared the traditional method (body weight and fluid balance) with bioelectrical impedance assessment while estimating body water. Body weight, fluid balance, resistance, reactance, lean body mass, body fat, total body water, triceps skinfold and total protein blood level were measured prospectively (preop, and on days 1, 3 and 5 postop) in 30 patients admitted for major surgery (thoracic, abdominal or vascular). The results suggest that body composition changed significantly with time (p < .05); in all 3 surgical groups. There was a low correlation between total body water measured by bioelectrical Impedance and fluid balance. Bioelectrical impedance assessment is sensitive to body water changes but appears to overestimate these variations compared to the traditional method.
authors.affiliation: Service de Chirurgie, Hôtel-Dieu de Montréal, Québec, Canada.
authors.forename: R
authors.initials: R
authors.lastname: Gagnon
authors.forename: M
authors.initials: M
authors.lastname: Gagner
authors.forename: S
authors.initials: S
authors.lastname: Duplessis
mesh_terms: D001798:Blood Proteins / Q000032:analysis; D001823:Body Composition / Q000502:physiology*; D001834:Body Water / Q000502:physiology*; D001835:Body Weight; D017097:Electric Impedance; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D016577:Pancreaticoduodenectomy; D011184:Postoperative Period; D013903:Thoracic Surgery; D014656:Vascular Surgical Procedures
chemical_list: D001798:Blood Proteins
vernacular_title: Variations de la composition corporelle par impédancemétrie bioélectrique après chirurgie majeure.