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Table 1 Characteristics and demographic data of study population

From: Non-invasive assessment of fluid responsiveness by changes in partial end-tidal CO2 pressure during a passive leg-raising maneuver

Age (years) 64 ± 13
Gender (M/F) 16/21
Weight (kg) 77 ± 17.2
Height (cm) 166.9 ± 7.6
Body surface area (m 2 ) 1.88 ± 0.21
Body mass index (Kg m -2 ) 25.9 (23.4 to 31.2)
APACHE II score at admission 18.8 ± 7.3
ICU survival rate (%) 24 (65%)
Plasma lactate level, mmol/L 2.79 ± 1.82
Ventilator settings  
Tidal volume, mL/Kg predicted body weight 8.1 ± 1.2
Respiratory rate, b.p.m. 20 (18 to 20)
Total PEEP, cm H 2 O 6.4 (4 to 8)
Mean airway pressure, cmH 2 O 12 (9.4 to 13)
Peak airway pressure, cmH 2 O 31.1 ± 6.2
FiO 2 ,% 0.73 ± 0.2
Vasoactive agents, n; dose (μg kg -1 min -1 )  
Norepinephrine 22; 0.23 (0.08 to 0.33)
Dobutamine 6; 6.2 (3.3 to 9.5)
Analgesia and sedative drugs  
Fentanyl, n; dose (μg kg -1 h -1 ) 24; 1.58 ± 0.53
Remifentanyl, n; dose (μg kg -1 min -1 ) 13; 0.14 ± 0.04
Midazolam, n; dose (mg kg -1 h -1 ) 24; 0.09 ± 0.03
Propofol, n; dose (mg kg -1 min -1 ) 2; 0.79 (0.7 to 0.89)
ARDS, n 3
Days on mechanical ventilation 1 (1 to 1)
ICU length of stay, days 8 (5 to 16)
Reason for fluid administration, n (%)  
Hypotension 11 (30%)
Oliguria 30 (81%)
Decrease vasoactive dosage 19 (51%)
Sepsis/Septic shock 26 (70%)
Abdominal 11 (30%)
Pulmonary 10 (27%)
Urological 2 (7%)
Neurological 2 (7%)
Other 1 (3%)
  1. APACHE, Acute Physiologic and Chronic Health Evaluation; ARDS, acute respiratory distress syndrome; F, female; FiO2, inspired oxygen fraction; ICU, intensive care unit; M, male; PEEP, positive end-expiratory pressure; SaO2, arterial oxygen saturation. Values are expressed as mean ± SD, median (25th to 75th percentile) or absolute numbers, as appropriate
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