. 2020 May 24;10:66. doi: 10.1186/s13613-020-00683-7

Table 2.

Arterial blood gas, lung mechanics and volumetric capnography data during the first PP session

Parameters	Before PP	2 h after PP	Before SP	2 h after SP
pH	7.26 ± 0.1	7.29 ± 0.1^a	7.35 ± 0.1^a	7.34 ± 0.1^a
P_aO₂ (mmHg)	77 ± 32	99 ± 60^a	83 ± 23^a	79 ± 23
P_aCO₂ (mmHg)	54 ± 13	51 ± 15^a	46 ± 11^a	46 ± 13^a
Bicarbonates (mmol/L)	23.9 ± 5.4	23.5 ± 5.6^a	25 ± 5.9^a	24.3 ± 5.4
S_aO₂ (%)	94 ± 3	96 ± 2^a	97 ± 2^a	96 ± 3^a
RR (cycles/min)	24 ± 6	25 ± 6^a	26 ± 6^a	26 ± 6^a
VT_e (mL/kg PBW)	7 ± 1.5	7.1 ± 1.9	7.2 ± 1.9	7.1 ± 1.7
F_iO₂ (%)	65 ± 22	54 ± 19^a	39 ± 14^a	46 ± 17^a
P_plat (cmH₂O)	29 ± 4	28 ± 4	27 ± 3^a	27 ± 4
PEEPtot (cmH₂O)	16 ± 3	16 ± 3	15 ± 3	16 ± 3
C_stat (mL/cmH₂O)	39 ± 16	40 ± 15	44 ± 18^a	45 ± 19^a
P_aO₂/F_iO₂	129 ± 52	189 ± 79^a	237 ± 92^a	192 ± 79a
ΔP (cmH₂O)	12.7 ± 4	12.3 ± 3.9	11.6 ± 3.8^a	11.6 ± 4.3
S_III (%CO₂/L)	9.28 ± 6.83	8.74 ± 8.5	10.1 ± 20.5	7.05 ± 5.18^a
P_etCO₂ (mmHg)	41 ± 9	39 ± 8^a	37 ± 8^a	35 ± 7^a
VCO_2-min (mL/min)	226 ± 71	232 ± 64	227 ± 64	225 ± 62
V_D/V_T-phy (%)	36.6 ± 8.5	35.9 ± 7.9	34.9 ± 8	33.5–8^a
P_(a-et)CO₂/P_aCO₂ (%)	22 ± 16.5	20.7 ± 15.3	19.5 ± 15.1^a	20.4 ± 17.8
V_E/VCO_2-min	66.5 ± 132	49.2 ± 13	67.8 ± 161^a	61.2 ± 94.9^a

Values are expressed with mean ± SD

RR respiratory rate, C_stat static compliance, ΔP driving pressure, S_III phase 3 slope of volumetric capnography, V_E minute ventilation

^ap < 0.05 compared to baseline value (before PP)