PaO(2)/FiO(2) Deterioration During Stable Extracorporeal Membrane Oxygenation Associates With Protracted Recovery and Increased Mortality in Severe Acute Respiratory Distress Syndrome.

During extracorporeal membrane oxygenation (ECMO), arterial oxygen partial pressure to fractional inspired oxygen (PaO2/FiO2; PF ratio reflects native and artificial lung blood oxygenation). In this study we analyzed PF ratio during ECMO support and its association with clinical outcome. This was a single-center observational study of adult patients (n = 81) undergoing veno-venous ECMO support for severe acute respiratory distress syndrome. In 37 patients (46%) PF ratio decreased from ECMO-day 1 to ECMO-day 7 (PF ratio deterioration [PF-d]; -37 ± 6.1 mm Hg), whereas in 44 patients PF ratio improved (PF-i; 65 ± 10.8 mm Hg). PF-d group required prolonged ECMO (median 21 days [interquartile range (IQR)]:14-35 days] versus 13 days [IQR: 10-20 days]) and invasive mechanical ventilation (median 33 days [IQR: 24-52 days] versus 26 days [IQR: 22-34 days]), longer intensive care unit (median 44 days [IQR: 32-74 days] versus 30 days [IQR: 25-47 days]), and hospital (median 66 days [IQR: 39-95 days] versus 36 days [IQR: 28-54 days]) lengths of stay, with higher hospital mortality rates (48.7% versus 22.7%). ECMO oxygenation did not explain PF ratio variation that remained stable in PF-d and decreased in PF-i (198 ± 12.7 mL/min versus 171 ± 8.8 mL/min). Pre-ECMO PF ratio, neuromuscular blockade, and prone position, as well as ventilatory variables did not differ between groups. The PF-d group was older (49 ± 2.1 years versus 41 ± 1.8 years) and presented lower Respiratory Extracorporeal Membrane Oxygenation Survival Prediction (RESP) scores (0.57 ± 0.63 versus 2.2 ± 0.52). With the use of logistic regression, PF ratio variation remained an independent predictor of hospital mortality after adjusting for age or RESP score. In severe acute respiratory distress syndrome, PF ratio deterioration during stable ECMO associates with protracted recovery and increased mortality, not accounted for by patient baseline characteristics, acute respiratory distress syndrome severity, or pre-ECMO management.

Roncon-Albuquerque R Jr ，Ferreira-Coimbra J ，Vilares-Morgado R ，Figueiredo P ，Paiva JA ... -  《-》

Early initiation of extracorporeal membrane oxygenation improves survival in adult trauma patients with severe adult respiratory distress syndrome.

Bosarge PL ，Raff LA ，McGwin G Jr ，Carroll SL ，Bellot SC ，Diaz-Guzman E ，Kerby JD ... -  《-》

[The experience of extracorporeal membrane oxygenation for severe acute respiratory failure in adults].

Sun B ，Wang CT ，Wu J ，Li XY ，He HY ，Zhang CY ，Tong ZH ，Zhan QY ，Wang C ... -  《-》

The impacts of baseline ventilator parameters on hospital mortality in acute respiratory distress syndrome treated with venovenous extracorporeal membrane oxygenation: a retrospective cohort study.

Wu MY ，Chang YS ，Huang CC ，Wu TI ，Lin PJ ... -  《BMC Pulmonary Medicine》

Early veno-venous extracorporeal membrane oxygenation is associated with lower mortality in patients who have severe hypoxemic respiratory failure: A retrospective multicenter cohort study.

The purpose of the study is to compare outcomes in patients who had severe hypoxemic respiratory failure (Pao2/fraction of inspired oxygen <100) who received early veno-venous extracorporeal membrane oxygenation (ECMO) as an adjunct to mechanical ventilation, to those in patients who received conventional mechanical ventilation alone. This is a multicenter, retrospective unmatched and matched cohort study of patients admitted between April 2006 and December 2013. Generalized logistic mixed-effects models and Cox proportional hazards models were used to determine the association between treatment with ECMO that was started within 3 days of intensive care unit (ICU) admission and ICU and hospital mortality and length of stay, respectively. A total of 2440 patients who had severe hypoxemic respiratory failure due to various etiologies were included, 46 who received early veno-venous ECMO and 2394 unmatched and 398 matched controls who received conventional ventilation alone. Compared to matched controls, ECMO was associated with a lower odds of ICU (odds ratio [95% confidence interval], 0.30 [0.13-0.67]) and inhospital death (odds ratio 0.30 [0.14-0.67]). In addition, ECMO was associated with longer times to discharge from ICU and hospital (hazard ratio, 0.42 [0.37-0.47] and 0.53 [0.38-0.73], respectively). In this observational study, use of early ECMO compared to conventional mechanical ventilation alone in patients who had severe hypoxemic respiratory failure was associated with a lower risk of mortality and a longer length of stay.

Kanji HD ，McCallum J ，Norena M ，Wong H ，Griesdale DE ，Reynolds S ，Isac G ，Sirounis D ，Gunning D ，Finlayson G ，Dodek P ... -  《-》