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Table 1 Patient characteristics at study entry

From: Physiological predictors of survival during high-frequency oscillatory ventilation inadults with acute respiratory distress syndrome

Variable  
Patient characteristics  
   Patients, number 102
   Age, years 50.8 ± 15.9
   Gender, % male 67.6
   Actual body weight, Kg 75.7 ± 21.24
   APACHEII prior HFOV 24.1 ±8.0
   Murray Score 2.98 ± 0.7
   Duration ARDS prior HFOV, hours median (IQR) 48 (24 to 120)
   Duration CMV prior HFOV, hours median (IQR) 45 (9 to 138)
Gas exchange on CMV pre-HFOV  
   PaO2, mmHg 74.2 ± 21
   PaCO2, mmHg 57.6 ± 18.7
   PaO2/FiO2, mmHg 93.8 ± 38.3
   SaO2, % 88.6 ± 11.99
   OI, cmH2· mmHg-1 27 ± 13.4
   pH 7.26 ± 0.14
Respiratory variables on CMV pre-HFOV  
   PIP, cmH2O 32.1 ± 5.67
   PEEP, cmH2O 12.4 ± 3.7
   CDP, cmH2O 21.6 ± 4.97
   Compliance 26.4(19.9 to 36.3)
   Minute ventilation, L.min-1 10.4 (8.5 to 12.6)
   Respiratory rate 20.9 ± 5.1
   Tidal volume on CMV, mL 551 (421.7 to 620)
Hemodynamics on CMV pre-HFOV  
   PAWP, cmH2O 16.8 ± 7.1
   Cardiac Output, L·min-1 5.95 ± 1.7
Etiology of ARDS  
   Sepsis 69
   Pulmonary infection 13
   Trauma 3
   Aspiration 2
   Pancreatitis 2
   Drug-induced 1
   Other 12
  1. Data are presented as absolute number, % or mean ± standard deviation (SD)unless otherwise indicated. CDP, continuous distending pressure; CMV, conventionalmechanical ventilation; CO, cardiac output; FiO2, fraction of inspiredoxygen; HFOV, high-frequency oscillatory ventilation; PAWP, pulmonary artery wedgepressure; PEEP, positive end-expiratory pressure; PIP, peak inspiratory pressure;OI, oxygenation index (OI =(FiO2•CDP•100)/PaO2).