Table 3

- Comparison of quantitative parameters according to conditions.

ParametersT1T2T3T4T5P-values*
MP (J/min)6.57±1.37.17±1.257.77±1.367.64±1.517.1±1.48<0.001
6.57 (3.81-11.39)7.1 (4.38-11.05)7.52 (4.56-11.11)7.49 (4.58-15.52)6.91 (3.69-13.03)
P peak (cmH2O)17.06±3.8119.25±3.8320.94±4.1220.25±3.4718.04±3.9<0.001
17 (11-30)19 (12-31)20 (12-31)20 (12-29)18 (9-27)
P plateau (cmH2O)16.66±3.7818.79±3.820.38±3.9619.69±3.3517.63±4.36<0.001
17 (10-30)18 (12-30)20 (11-30)20 (11-28)17 (8-32)
DP (cmH2O)11.77±3.8113.94±3.8615.52±3.9314.76±3.3212.56±4.05<0.001
12 (5-27)13 (8-27)15 (6-25)15 (6-23)12 (3-24)
C (ml/cmH2O)67.31±18.2453.08±15.1946.97±15.7948.1±13.7262.65±24.16<0.001
65 (22-113)51 (23-94)45 (22-136)45 (28-96)58 (25-150)
TV (ml)499±18.08497±23.06501±24.55502±49.8509±44.90.66
497 (451-587)496 (375-572)499 (431-571)498 (441-683)500 (407-682)
  • Values are presented as mean ± standard deviation and median (minimum-maximum).

  • * Friedman test.

  • P: pressure, MP: mechanical power, TV: tidal volume, DP: driving pressure, C: compliance, T1: 15th minute in the supine position, T2: 15th minute into the first prone position, T3: at the first hour in the prone position, T4: at the conclusion of the surgery in the final prone position, T5: in the final supine position, 15 minutes after return