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Provedor de dados:  BJMBR
País:  Brazil
Título:  Glomerular filtration is reduced by high tidal volume ventilation in an in vivo healthy rat model
Autores:  Luque,A.
Shimizu,M.H.M.
Andrade,L.
Sanches,T.R.
Seguro,A.C.
Data:  2009-11-01
Ano:  2009
Palavras-chave:  Artificial respiration
Kidney
Physiology
Glomerular filtration rate
Wistar rats
Resumo:  Mechanical ventilation has been associated with organ failure in patients with acute respiratory distress syndrome. The present study examines the effects of tidal volume (V T) on renal function using two V T values (8 and 27 mL/kg) in anesthetized, paralyzed and mechanically ventilated male Wistar rats. Animals were randomized into two groups of 6 rats each: V T8 (V T, 8 mL/kg; 61.50 ± 0.92 breaths/min; positive end-expiratory pressure, 3.0 cmH2O; peak airway pressure (PAW), 11.8 ± 2.0 cmH2O), and V T27 (V T, 27 mL/kg; 33.60 ± 1.56 breaths/min; positive end-expiratory pressure, none, and PAW, 22.7 ± 4.0 cmH2O). Throughout the experiment, mean PAW remained comparable between the two groups (6.33 ± 0.21 vs 6.50 ± 0.22 cmH2O). For rats in the V T27 group, inulin clearance (mL·min-1·body weight-1) decreased acutely after 60 min of mechanical ventilation and even more significantly after 90 min, compared with baseline values (0.60 ± 0.05 and 0.45 ± 0.05 vs 0.95 ± 0.07; P < 0.001), although there were no differences between groups in mean arterial pressure or gasometric variables. In the V T8 group, inulin clearance at 120 min of mechanical ventilation remained unchanged in relation to baseline values (0.72 ± 0.03 vs 0.80 ± 0.05). The V T8 and V T27 groups did not differ in terms of serum thiobarbituric acid reactive substances (3.97 ± 0.27 vs 4.02 ± 0.45 nmol/mL) or endothelial nitric oxide synthase expression (94.25 ± 2.75 vs 96.25 ± 2.39%). Our results show that glomerular filtration is acutely affected by high tidal volume ventilation but do not provide information about the mechanism.
Tipo:  Info:eu-repo/semantics/other
Idioma:  Inglês
Identificador:  http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2009001100017
Editor:  Associação Brasileira de Divulgação Científica
Relação:  10.1590/S0100-879X2009001100017
Formato:  text/html
Fonte:  Brazilian Journal of Medical and Biological Research v.42 n.11 2009
Direitos:  info:eu-repo/semantics/openAccess
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