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. 2021 Aug 20;100(33):e26973. doi: 10.1097/MD.0000000000026973

Table 2.

Correlation analysis of PETCO2 and PaCO2 under different ventilator modes.

Ventilator modes Pairs PETCO2 (mm Hg) PaCO2 (mm Hg) PaCO2- PETCO2 gap (mm Hg) r P
All modes 298 36.65 ± 10.31 39.40 ± 11.30 1.60 ± 7.60 0.72 <.001
A/C 30 37.33 ± 7.85 38.56 ± 8.01 1.23 ± 8.16 0.47 <.001
SIMV 127 36.20 ± 10.63 38.06 ± 12.76 1.86 ± 7.42 0.81 <.001
SPONT 68 38.16 ± 8.58 39.56 ± 7.22 1.40 ± 7.57 0.55 <.001

A/C = assisted/controlled ventilation, PaCO2 = arterial carbon dioxide tension, PETCO2 = end-expiratory carbon dioxide partial pressure, SIMV = synchronized intermittent mandatory ventilation, SPONT = spontaneous breathing.