Erroneous Hyperoxia Worsens ECMO-Assisted CPR Neurologic Outcomes

The gape lined in this summary was as soon as published on as a preprint and has no longer yet been gape reviewed.

Key Takeaways

  • Erroneous hyperoxia was as soon as associated with less favorable non eternal neurologic outcomes in patients who underwent extracorporeal membrane oxygenation (ECMO)-assisted cardiopulmonary resuscitation (ECPR) for out-of-sanatorium cardiac arrest (OHCA).

  • Survival at 30 days after cardiac arrest was as soon as also considerably reduced in patients with outrageous hyperoxia.

Why This Issues

  • Survival is on the total wretched for patients with OHCA, however ECPR has been associated with improved scientific outcomes. On the other hand, there are little recordsdata on the construct of hyperoxia on ECPR outcomes.

  • The findings pork up old stories showing an affiliation between hyperoxia and wretched scientific outcomes. Nonetheless this gape, in distinction to old stories, integrated an even bigger sample and adjusted for a quantity of confounding components, including age, sex, and etiology of cardiac arrest.

  • The outcomes counsel that outrageous hyperoxia could maybe honest soundless be shunned all the plan in which by plan of ECPR to present a boost to neurologic outcomes after OHCA.

  • On account of they checked out preliminary blood gas stages after starting up ECMO, gape investigators advised that scientific outcomes could maybe very well be improved after adjustment of the portion of oxygen in the sweep gas (FDO2) at ECMO initiation.

Watch Originate

  • The retrospective evaluation alive to 847 adults (79% male) getting into the Eastern Affiliation for Acute Medication Out-of-Sanatorium Cardiac Arrest (JAAM-OHCA) nationwide registry between June 2014 and December 2017 who underwent ECPR as segment of their resuscitation and for whom there were total recordsdata.

  • Patients had been grouped per their preliminary partial strain of oxygen in arterial blood (PaO2) diploma after starting up ECMO: normoxia (PaO2 ≤ 200 mm Hg), common hyperoxia (PaO2 > 200 mm Hg and ≤ 400 mm Hg), and outrageous hyperoxia (PaO2 > 400 mm Hg).

  • Patients with dazzling cerebral recovery or common cerebral incapacity had been categorised as having favorable neurologic outcomes at review 30 days after cardiac arrest. Snide neurologic outcomes integrated severe cerebral incapacity, coma or vegetative divulge, and demise or brain demise.

Key Results

  • The median PaO2 diploma was as soon as 300 mm Hg.

  • At 30 days, 16.5% had favorable neurologic outcomes and 33.1% had survived.

  • Patients in the outrageous hyperoxia community (n = 257), in comparison with the normoxia community (n = 277), had been considerably less seemingly to abilities favorable neurologic outcomes in adjusted evaluation (odds ratio [OR], 0.48; 95% CI, 0.29 – 0.82; P = .007) or to be alive 30 days after cardiac arrest (OR, 0.66; 95% CI, 0.44 – 1.00; P = .048).

  • Neither mortality nor neurologic outcomes differed considerably between the common hyperoxia community (n = 313) and the normoxia community.


  • Differences in ECPR protocols amongst centers could maybe need influenced the overall gape outcomes.

  • The registry didn’t contain recordsdata on ECMO length or size of sanatorium or intensive care unit pause.

  • Blood gas recordsdata had been missing for two-thirds of the registry’s patients who underwent ECPR; exclusion of these patients could maybe need distorted the effects.

  • Investigators didn’t contain recordsdata on cardiac characteristic, which can contain an affect on PaO2 stages.

  • There isn’t any longer any identical old definition of outrageous hyperoxia; the cutoff PaO2 price of 400 mm Hg was as soon as chosen arbitrarily.

  • Additional compare is mandatory to deal with the boundaries and to search out out the optimal PaO2 diploma for improvement of neurologic outcomes in patients with OHCA who ranking ECPR.


  • The gape got no industrial funding.

  • Author Hiroyuki Tsutsui, MD, is president of the Eastern Coronary heart Failure Society and discloses receiving grants from Daiichi Sankyo, Mitsubishi Tanabe Pharma, Nippon Boehringer Ingelheim, IQVIA Companies and products Japan, Omron Healthcare, and MEDINET; and personal fees from Daiichi Sankyo, Mitsubishi Tanabe Pharma, Nippon Boehringer Ingelheim, AstraZeneca, Ono Pharmaceutical, Otsuka Pharmaceutical, Novartis Pharma, Bayer Yakuhin, Pfizer Japan, Bristol-Myers Squibb, Kowa, and Nippon Rinsho.

  • The alternative authors expose they haven’t any conflicts of hobby.

It is miles a summary of a preprint compare gape, Affiliation Between Quick Neurological Outcomes and Erroneous Hyperoxia in Patients With Out-of-Sanatorium Cardiac Arrest Who Underwent Extracorporeal Cardiopulmonary Resuscitation: A Retrospective Observational Watch From a Multicenter Registry, written by Masahiro Kashiura, MD, from Saitama Clinical Heart, Jichi Clinical College, Japan, and colleagues on supplied to you by Medscape. This gape has no longer yet been gape reviewed. The fat text of the gape could maybe additionally be chanced on on

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