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Table 2 Arterial blood gas and hemodynamic variables pressure support ventilation with 10 cm H2O above PEEP of 5 cm H2O (PSV10) and spontaneous breathing trial (SBT)

From: Neuroventilatory efficiency and extubation readiness in critically ill patients

  Extubation outcome PSV10 T5 Tend
   Mean SD Mean SD Mean SD
pH Success 7.45 0.05 7.46 0.05 7.47 0.08
  Failure 7.46 0.06 7.44 0.08 7.46 0.05
PaCO2, mm Hg Success 36.4 7.6 37.3 8.5 35.9 8.7
  Failure 40.9 9.2 45.9ab 14.2 41.9a 9.3
HCO3, mM Success 25.2 6.4 26.9b 5.3 26.0 5.5
  Failure 29.2a 4.8 30.8a 4.4 30.0a 4.3
PaO2/FiO2 Success 282.6 71.7 302.3 103.8 299.3 93.7
  Failure 257.9 81.3 249.0 79.3 243.5 91.1
HR, beats/min Success 89.8 11.9 90.9 11.8 91.1 11.4
  Failure 95.9 12.1 95.4 11.3 98.0 13.0
MBP, mm Hg Success 88.8 10.6 90.6 12.4 90.5 13.1
  Failure 83.9 7.4 82.2 9.8 89.4 16.1
  1. Values are presented as mean ± standard deviation (SD). T5 and Tend indicate values obtained at 5 minutes and the last values obtained during the SBT with CPAP of 5 cm H2O. aDifferences (P < 0.05) between failure and successfully extubated groups at the same time point. bDifferences (P < 0.05) between PSV10 and other time points in the respective groups.