Table 2

Respiratory and hemodynamic parameters before and after recruitment maneuver
	Extended sigh			Continuous positive airway pressure

	Baseline	5 minutes	60 minutes	Baseline	5 minutes	60 minutes

Plateau pressure, cm H₂O	31 ± 4	28 ± 5	28 ± 5	31 ± 3	30 ± 3	30 ± 3
End-expiratory lung volume, mL	834 ± 133	957 ± 228^a	998 ± 184^a	927 ± 191	1,097 ± 120^a	1,001 ± 133^a
Recruited volume, mL	692 ± 189	867 ± 339^a	857 ± 335^a	695 ± 217	781 ± 328^a	730 ± 288
Quasi-static compliance, mL/cm H₂O	28 ± 3	36 ± 4^a	37 ± 4^a	29 ± 3	32 ± 3	33 ± 3
PaCO₂, mm Hg	52 ± 12	56 ± 10	55 ± 11	54 ± 9	57 ± 10	55 ± 10
pH	7.28 ± 0.11	7.27 ± 0.08	7.28 ± 0.09	7.28 ± 0.08	7.26 ± 0.09	7.27 ± 0.09
Heart rate, beats per minute	98 ± 22	99 ± 23	99 ± 22	97 ± 22	98 ± 22	98 ± 23
Systolic arterial pressure, mm Hg	123 ± 18	119 ± 10	118 ± 16	125 ± 13	120 ± 16	116 ± 18
Diastolic arterial pressure, mm Hg	62 ± 8	63 ± 9	61 ± 7	64 ± 10	63 ± 8	63 ± 10
Mean arterial pressure, mm Hg	81 ± 12	79 ± 13	80 ± 12	84 ± 10	80 ± 13	81 ± 18

^aP < 0.05 versus baseline. PaCO₂, arterial partial pressure of carbon dioxide.
Constantin et al. Critical Care 2008 12:R50 doi:10.1186/cc6869