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Table 1 Respiratory parameters and blood gas analysis at inclusiona

From: PaCO2 and alveolar dead space are more relevant than PaO2/FiO2 ratio in monitoring the respiratory response to prone position in ARDS patients: a physiological study

Parameters

Median

1st to 3rd interquartile range

LIS

3.25

3 to 3.25

Tidal volume, mL/kg IDB

6.2

5.6 to 8.3

RR, breaths/minute

22

18 to 26

PEEP, cmH2O

6

5 to 7

FiO2, %

90

90 to 100

Pplat, cmH2O

27

26 to 28

PaO2/FiO2, mmHg

70

51 to 77

PaCO2, mmHg

58

52 to 60

Crs, mL/cmH2O

16

13 to 30

VDalv/VT

0.42

0.35 to 0.47

VDalv, mL

159

95 to 236

  1. aCrs: compliance of the respiratory system; IDB: ideal body weight; LIS: lung injury score [32]; PaCO2: partial pressure of arterial CO2; PaO2/FiO2: ratio of partial pressure of arterial O2 to fraction of inspired O2; PEEP: positive end-expiratory pressure; Pplat: plateau pressure; RR: respiratory rate; VDalv/VT: ratio of alveolar dead space to tidal volume.
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Critical Care

ISSN: 1364-8535