Different positive end expiratory pressure and tidal volume controls on lung protection and inflammatory factors during surgical anesthesia

Table 4 Comparison of airway compliance indexes between the two groups (mean ± SD)

Group	T0	T1	T2	T3
Ppeak (cmH2O)
Group A (n = 60)	15.36 ± 2.44	20.06 ± 1.98	21.58 ± 2.74	17.41 ± 2.80
Group B (n = 60)	16.11 ± 2.70	18.62 ± 2.70	20.67 ± 2.68	18.15 ± 2.76
t value	-1.596	3.331	1.839	-1.458
P value	0.113	0.001	0.068	0.148
Pmean (cmH2O)
Group A (n = 60)	8.51 ± 1.84	10.33 ± 1.96	11.36 ± 2.24	10.71 ± 2.54
Group B (n = 60)	8.93 ± 2.00	9.81 ± 2.71	10.95 ± 2.46	10.40 ± 2.75
t value	-1.197	1.204	0.955	0.641
P value	0.234	0.231	0.342	0.522
Cdyn (cmH2O)
Group A (n = 60)	38.64 ± 3.11	30.52 ± 3.04	29.64 ± 3.11	33.75 ± 3.58
Group B (n = 60)	39.33 ± 4.05	28.64 ± 3.58	28.11 ± 2.90	32.68 ± 2.83
t value	-1.047	3.101	2.787	1.816
P value	0.297	0.002	0.006	0.072

P_peak: Peak airway pressure; P_mean: Mean airway pressure; Cdyn: Dynamic pulmonary compliance.