title: [Influence of different body positions in vital capacity in patients on postoperative upper abdominal].
abstract: BACKGROUND
  The changes in body position can cause changes in lung function, it is necessary to understand them, especially in the postoperative upper abdominal surgery, since these patients are susceptible to postoperative pulmonary complications.
  
  
  OBJECTIVE
  To assess the vital capacity in the supine position (head at 0° and 45°), sitting and standing positions in patients in the postoperative upper abdominal surgery.
  
  
  METHODS
  A cross-sectional study conducted between August 2008 and January 2009 in a hospital in Salvador/BA. The instrument used to measure vital capacity (VC) was analogic spirometer, the choice of the sequence of positions followed a random order obtained from the draw of the four positions. Secondary data were collected from the medical records of each patient.
  
  
  RESULTS
  The sample consisted of 30 subjects with a mean age of 45.2±11.2 years, BMI 20.2±1.0 kg/m(2). The position on orthostasis showed higher values of CV regarding standing (mean change: 0.15±0.03 liters; p=0.001), the supine to 45 (average difference: 0.32±0.04 liters; p=0.001) and 0° (0.50±0.05 liters; p=0.001). There was a positive trend between the values of FVC supine to upright posture (1.68±0.47; 1.86±0.48; 2.02±0.48 and 2.18±0.52 liters; respectively).
  
  
  CONCLUSIONS
  Body position affects the values of CV in patients in the postoperative upper abdominal surgery, increasing in postures where the chest is vertical.
authors.affiliation: Hospital Aliança, Salvador, BA, Brasil; Escola Baiana de Medicina e Saúde Pública (EBMSP), Salvador, BA, Brasil; Faculdade Social da Bahia (FSBA), Salvador, BA, Brasil.
authors.forename: Bruno Prata
authors.initials: BP
authors.lastname: Martinez
authors.affiliation: Faculdade Social da Bahia (FSBA), Salvador, BA, Brasil.
authors.forename: Joilma Ribeiro
authors.initials: JR
authors.lastname: Silva
authors.affiliation: Faculdade Social da Bahia (FSBA), Salvador, BA, Brasil; Universidade Federal da Bahia (UFBA), Salvador, BA, Brasil.
authors.forename: Vanessa Salgado
authors.initials: VS
authors.lastname: Silva
authors.affiliation: Universidade Federal da Bahia (UFBA), Salvador, BA, Brasil.
authors.forename: Mansueto Gomes
authors.initials: MG
authors.lastname: Neto
authors.affiliation: Centro Universitário Metodista (IPA), Programa de Pós-graduação em Reabilitação e Inclusão, e, Biociências e Reabilitação, Porto Alegre, RS, Brasil; Laboratório de Vias Aéreas e Pulmão do Hospital de Clínicas de Porto Alegre, Porto Alegre, RS, Brasil. Electronic address: forgiarini.luiz@gmail.com.
authors.forename: Luiz Alberto
authors.initials: LA
authors.lastname: Forgiarini Júnior
keywords: Abdominal surgery; Capacidade vital forçada; Cirurgia abdominal; Complicações pós‐operatórias; Forced vital capacity; Posicionamento do paciente; Positioning the patient; Postoperative complications