title: Hemodynamic and metabolic effects of passive leg movement in mechanically ventilated patients.
abstract: OBJECTIVE
  Limb movements, passively performed by a physiotherapist, have been shown to result in significant increases in critically ill patients' metabolic and hemodynamic variables. This study objective was to determine whether passive cycling leg movement increases hemodynamic and metabolic variables in sedated mechanical ventilation dependent patients.
  
  
  METHODS
  Five sedated mechanical ventilation dependent patients in a 18-bed intensive care unit of a university hospital were evaluated. Passive cycling leg movements were performed for 10min at a 30 movements/min rate. Complete hemodynamical data were recorded and arterial and mixed venous blood sample were collected 5 minutes before and after 5 minutes after the maneuver completion.
  
  
  RESULTS
  All patients had increased oxygen consumption (VO2). The VO2 increase occurred with a concomitant drop in mixed venous blood saturation (SvO2), likely from both oxygen extraction ratio (O2ER) and cardiac index (CI) increase.
  
  
  CONCLUSIONS
  passive cycling leg movements may influence hemodynamical and metabolic status in sedated mechanical ventilation-dependent patients.
authors.affiliation: Unidade de Terapia Intensiva, Hospital Moinhos de Vento, Porto Alegre, RS, Brasil.
authors.forename: Augusto
authors.initials: A
authors.lastname: Savi
authors.forename: Cristiano Pires
authors.initials: CP
authors.lastname: Maia
authors.forename: Alexandre Simões
authors.initials: AS
authors.lastname: Dias
authors.affiliation: Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, RS, Brasil.
authors.forename: Cassiano
authors.initials: C
authors.lastname: Teixeira