Effects of pressure-controlled ventilation targeting end-inspiratory flow rate on pulmonary complications and inflammation levels in patients undergoing spinal surgery in the prone position: a randomized clinical trial

Table 2 Comparison of the airway-related indexes of the three groups at different time points

Groups	P_peak(cmH2O)	Cdyn(ml/cmH₂O)	P_ETCO₂(mmHg)	PaO₂/FiO₂(mmHg)
Group V (n = 61)
T0	13.3 ± 1.5	39.0 ± 6.6	34.6 ± 4.6	198 ± 20
T1	15.4 ± 1.6 ^a	33.7 ± 5.6 ^a	35.1 ± 4.5	212 ± 23 ^b
T2	15.5 ± 2.0 ^a	33.8 ± 6.4 ^a	35.2 ± 4.4	215 ± 18 ^b
T3	13.3 ± 1.8	39.4 ± 7.3	34.3 ± 6.0	216 ± 21 ^b
Group P₁ (n = 62)
T0	11.5 ± 1.0 ^c	44.9 ± 8.7 ^c	34.4 ± 4.7	201 ± 17
T1	13.5 ± 1.4 ^ac	38.3 ± 7.7 ^ac	34.8 ± 4.7	215 ± 20 ^b
T2	13.7 ± 1.5 ^ac	37.8 ± 7.7 ^ac	35.0 ± 4.6	216 ± 23 ^b
T3	11.6 ± 1.0 ^ac	44.4 ± 8.6 ^c	34.7 ± 4.5	218 ± 19 ^b
Group P₂ (n = 64)
T0	13.3 ± 1.5 ^d	51.2 ± 9.2 ^cd	34.1 ± 4.9	204 ± 20
T1	12.4 ± 1.0 ^ace	43.2 ± 8.3 ^acd	34.7 ± 5.2	216 ± 18 ^b
T2	12.5 ± 1.1 ^ace	42.9 ± 8.6 ^acd	34.8 ± 5.2	218 ± 22 ^b
T3	10.2 ± 1.0 ^ace	52.7 ± 10.6 ^cd	34.0 ± 6.5	219 ± 17 ^b
F_time, P_time	525.456,0.000	407.854,0.000	5.129,0.002	279.859,0.000
F_group, P_group	97.236,0.000	32.098,0.000	0.150,0.860	1.018,0.363
F _timegroup, P _timegroup	0.864,0.524	9.966,0.000	0.492,0.815	0.849,0.533

Note: Compared with T₀, ^aP < 0.01, ^bP < 0.05; Compared with Group V, ^cP < 0.01; Compared with Group P₁, ^dP < 0.01, ^eP < 0.05. P_peak: peak airway pressure, Cdyn: lung dynamic compliance, P_ETCO₂: end-expiratory carbon dioxide partial pressure, PaO₂/FiO₂: oxygenation index

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