Table 2. Ventilatory and biochemical parameters of patients with COVID-19 before and during ELMO use, by treatment outcome.^a .

Parameter	Failure group		p	Success group		p
	(n = 22)			(n = 28)
	Before ELMO use	During ELMO use		Before ELMO use	During ELMO use
Sao2, %	92.5 ± 4.9	95.9 ± 2.5	0.001	93.7 ± 3.8	96.2 ± 2.4	0.010
pH	7.45 ± 0.04	7.44 ± 0.04	0.567	7.43 ± 0.07	7.43 ± 0.04	0.908
Pao2,mmHg	81.6 ± 31.4	104.8 ± 41.1	0.067	85.5 ± 30.8	128.1 ± 47.8	< 0.001
Paco2, mmHg	35.8 ± 7.2	35.5 ± 3.1	0.694	38.2 ± 11.2	37.6 ± 5.6	0.797
HCO3, mmol/L	24.3 ± 2.2	24.3 ± 2.5	0.651	25.2 ± 2.1	25.2 ± 2.2	0.48
BE, mmol/L	0.2 [−1.1 to 2.5]	0.6 [−0.5 to 3.6]	0.173	1.25 [0.05-2.13]	0.9 [0.0-2.7]	0.948
Lactate, mmol/L	1.85 [1.13-2.52]	1.6 [1.0-2.12]	0.511	1.48 [1.09-2.13]	1.66 [1.23-2.00]	0.518
Pao2/Fio2	126.7 ± 49.1	177.08 ± 83.27	0.024	125.9 ± 37.4	217.56 ± 113.13	< 0.001

^aValues expressed as mean ± SD or median [IQR]. HCO₃: bicarbonate; and BE: base excess.