Neuroventilatory efficiency and extubation readiness in critically ill patients

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)

	Extubation outcome	PSV₁₀		T₅		T_end
		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
PaCO_2, mm Hg	Success	36.4	7.6	37.3	8.5	35.9	8.7
	Failure	40.9	9.2	45.9^ab	14.2	41.9^a	9.3
HCO_3, mM	Success	25.2	6.4	26.9^b	5.3	26.0	5.5
	Failure	29.2^a	4.8	30.8^a	4.4	30.0^a	4.3
PaO₂/F_iO₂	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

Values are presented as mean ± standard deviation (SD). T₅ and T_end 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.

ISSN: 1364-8535