Table 2. Clinical characteristics of the patients before the use of extracorporeal membrane oxygenation (N = 30).^a .

Characteristic	Result
Time to ECMO, days
First symptoms to ECMO	19 [13-24]
Hospital admission to ECMO	11 [5-15]
Intubation to ECMO	4 [1-10]
Total SOFA scoreb	11 [8-12]
Vasoactive-inotropic scoreb	6 [0-25]
APPSb	7 [7-8]
RESP scoreb	2 [2-5]
Murray score	3.3 [3.3-3.5]
Ventilation parameters
Fio2, %b	100 [100-100]
PEEP, cmH2Ob	10 [10-10]
RR, breaths/min	34 [30-36]
Plateau pressure, cmH2Oc	28.5 [25-32]
Driving pressure, cmH2Oc	17 [13-24]
Pulmonary compliance, cmH2Oc	20 [15-24]
Laboratory analysis
pHb	7.31 [7.23-7.40]
Pao2/Fio2 b	66 [54-75]
pCo2, mmHgb	55 [47-68]
Plasma bicarbonate, mmol/Le	27 [22-32]
Arterial lactate, mg/dL	14 [11-20]
White cell count, cells/mm³c	12.920 [9.510-15.300]
Lymphocytes, cells/mm³c	680 [550-990]
Serum creatinine, mg/dLc	0.90 [0.57-1.36]
Rescue therapy before ECMO
Neuromuscular blockade, hd,f	48 [5-144]
Prone positioning	23 (76.7)
Inhaled nitric oxide	01 (3.3)

ECMO: extracorporeal membrane oxygenation; APPS: acronym for Age, Pao₂/FIo₂ ratio, and Plateau pressure measured at 24 h after diagnosis of ARDS Score; and RESP: Respiratory ECMO Survival Prediction score. ^aValues expressed as n (%) or median [IQR]. ^bn = 29. n = 28. ^dn = 27. ^en = 24. ^fAll patients used neuromuscular blockers, but only 27 patients had the total number of hours of treatment recorded.