Spontaneous breathing trial and post-extubation work of breathing in morbidly obese critically ill patients

Table 3 Arterial blood gases and hemodynamic variables during the five different weaning tests and at 20 minutes after extubation

	PSV	PSV	PSV	PSV	T piece	After extubation
	+7 cmH₂O PEEP	0 cmH₂O PEEP	+7 cmH₂O PEEP	0 cmH₂O PEEP
	+7 cmH₂O	+7 cmH₂O	0 cmH₂O	0 cmH₂O
Ph	7.45 ± 0.06	7.44 ± 0.06	7.44 ± 0.06	7.44 ± 0.06	7.43 ± 0.06	7.42 ± 0.06
Pa_CO2, mmHg	41 ± 11	42 ± 11	43 ± 12	43 ± 12	44 ± 13	44 ± 10
Pa_O2/FI_O2	277 ± 76	257 ± 81	252 ± 73	230 ± 65	217 ± 65	224 ± 51
SBP, mmHg	148 ± 22	148 ± 26	148 ± 26	146 ± 30	150 ± 18	147 ± 24
DBP, mmHg	72 ± 12	71 ± 12	73 ± 12	72 ± 15	69 ± 13	70 ± 15
HR, beats/minute	96 ± 14	97 ± 16	98 ± 16	100 ± 16	99 ± 14	101 ± 15

There were no statistically significant differences between respiratory variables among the successive tests. Abbreviations: DBP diastolic blood pressure, HR heart rate, ND not done, PEEP positive end-expiratory pressure, PSV pressure support ventilation, SBP systolic blood pressure

ISSN: 1364-8535