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01-12-2020 | Care | Original

Conservative oxygen therapy for mechanically ventilated adults with suspected hypoxic ischaemic encephalopathy

Authors: Paul Young, Diane Mackle, Rinaldo Bellomo, Michael Bailey, Richard Beasley, Adam Deane, Glenn Eastwood, Simon Finfer, Ross Freebairn, Victoria King, Natalie Linke, Edward Litton, Colin McArthur, Shay McGuinness, Rakshit Panwar, on behalf of the ICU-ROX Investigators and the Australian and New Zealand Intensive Care Society Clinical Trials Group

Published in: Intensive Care Medicine | Issue 12/2020

Abstract

Purpose

Liberal use of oxygen may contribute to secondary brain injury in patients with hypoxic-ischaemic encephalopathy (HIE). However, there are limited data on the effect of different oxygen regimens on survival and neurological disability in HIE patients.

Methods

We undertook a post-hoc analysis of the 166 patients with suspected HIE enrolled in a trial comparing conservative oxygen therapy with usual oxygen therapy in 1000 mechanically ventilated ICU patients. The primary endpoint for the current analysis was death or unfavourable neurological outcome at day 180. Key secondary outcomes were day 180 mortality, and cause-specific mortality.

Results

Patients with HIE allocated to conservative oxygen spent less time in the ICU with an SpO₂ ≥ 97% (26 h [interquartile range (IQR) 13–45 vs. 35 h [IQR 19–70], absolute difference, 9 h; 95% CI − 21.4 to 3.4). A total of 43 of 78 patients (55.1%) assigned to conservative oxygen and 49 of 72 patients (68.1%) assigned to usual oxygen died or had an unfavourable neurological outcome at day 180; odds ratio 0.58; 95% CI 0.3–1.12; P = 0.1 adjusted odds ratio 0.54; 95% CI 0.23–1.26; P = 0.15. A total of 37 of 86 patients (43%) assigned to conservative oxygen and 46 of 78 (59%) assigned to usual oxygen had died by day 180; odds ratio 0.53; 95% CI 0.28–0.98; P = 0.04; adjusted odds ratio 0.56; 95% CI 0.25–1.23; P = 0.15. Cause-specific mortality was similar by treatment group.

Conclusions

Conservative oxygen therapy was not associated with a statistically significant reduction in death or unfavourable neurological outcomes at day 180. The potential for important benefit or harm from conservative oxygen therapy in HIE patients is not excluded by these data.

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Title: Conservative oxygen therapy for mechanically ventilated adults with suspected hypoxic ischaemic encephalopathy
Authors: Paul Young
Diane Mackle
Rinaldo Bellomo
Michael Bailey
Richard Beasley
Adam Deane
Glenn Eastwood
Simon Finfer
Ross Freebairn
Victoria King
Natalie Linke
Edward Litton
Colin McArthur
Shay McGuinness
Rakshit Panwar
on behalf of the ICU-ROX Investigators and the Australian and New Zealand Intensive Care Society Clinical Trials Group
Publication date: 01-12-2020
Publisher: Springer Berlin Heidelberg
Keywords: Care
Encephalopathy
Published in: Intensive Care Medicine / Issue 12/2020
Print ISSN: 0342-4642
Electronic ISSN: 1432-1238
DOI: https://doi.org/10.1007/s00134-020-06196-y

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Conservative oxygen therapy for mechanically ventilated adults with suspected hypoxic ischaemic encephalopathy

Abstract

Purpose

Methods

Results

Conclusions

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusions

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