Skip to main content

Table 1 Baseline demographic and clinical data of the patients (\( \overline{\mathrm{x}} \) ±s, n = 19)

From: The effects of low tidal ventilation on lung strain correlate with respiratory system compliance

  All (n = 19) C ≥ 0.6 (n = 9) C < 0.6 (n = 10) p value
Male n,% 13 (68) 7 (78) 6 (60) 0.628
Age, years 70 ± 14 71 ± 12 68 ± 17 0.687
Height, cm 170 ± 6 170 ± 7 170 ± 7 0.937
IBW, kg 64.9 ± 7.3 65.4 ± 7.9 64.4 ± 7.0 0.769
APACHE II 19.3 ± 6.8 18.6 ± 8.3 19.9 ± 5.6 0.681
Murray score 2.4 ± 0.5 2.2 ± 0.4 2.6 ± 0.6 0.082
ARDSp/ARDSexp, n 15/4 7/2 8/2 1.000
PaO2/FiO2, mmHg 200 ± 87 212 ± 69 189 ± 103 0.580
Hours of ventilation 67.6 ± 36.1 69.8 ± 34.0 65.7 ± 39.7 0.814
VT, ml/kg 6.6 ± 1.1 6.7 ± 1.1 6.5 ± 1.3 0.720
PEEP, cmH2O 8.2 ± 1.7 8.3 ± 1.6 8.1 ± 1.9 0.777
C, ml/(cmH2O/kg) 0.65 ± 0.22 0.83 ± 0.20 0.49 ± 0.07* 0.001
EELV, ml 1873 ± 1065 2546 ± 1024 1267 ± 689* 0.005
Strain 0.31 ± 0.19 0.19 ± 0.08 0.42 ± 0.20* 0.007
Severity of ARDS, n (%)
 mild 7 (36.8) 4 (44.4) 3 (30.0) 0.650
 moderate 10 (52.6) 5 (55.6) 5 (50.0) 1.000
 severe 2 (10.5) 0 (0) 2 (20.0) 0.474
28-day mortality, n (%) 8 (42.1) 3 (33.3) 5 (50) 0.788
  1. Abbreviations: IBW ideal body weight, APACHE II Acute Physiology and Chronic Health Evaluation II, ARDSp/ARDSexp ARDS with pulmonary and extrapulmonary origin, V T tidal volume, PEEP positive-end expiratory pressure, C respiratory system compliance, EELV end-expiratory lung volume, ARDS acute respiratory distress syndrome
  2. * p < 0.05 for comparison with C ≥ 0.6 subjects