Table 1.

Ventilator modes at different time

Time	Mode	TV set	TV delivered	PEEP	Plateau	PIP	FiO2	RR/min	P/F	SpO2
T (−2)	VCV	300	240–280	12–14	34–37	45–50	100	24	54	72%
T (−1)	VCV	320	300–320	14–20	32–34	45	100	24	55	71%–75%
T0	VCV	350	300–350	20	32–34	43	100	24		71%–75%
T4hr	VCV	360	350–400	18	30–34	40	60	22	131	92%
T8hr	VCV	360	360–400	16	28–30	35	60	22		99%
T16 hr	VCV	400	400	16	25–30	35	55	20	257	99%

(T (−2) before sedation and paralysis, T (−1) after 4 hours of sedation and paralysis. T0- immediately after proning, T4h, T8hr, T16hr- corresponding hour after proning). FiO2, fraction of inspired oxygen; PEEP, positive end expiratory pressure; PIP, peak inspiratory pressure; P/F, PaO2/Fio2; RR, respiratory rate; SpO2-peripheral oxygen saturation; TV, tidal volume; VCV, volume control ventilation.