The helmet was so effective that the researchers actually stopped the trial before its completion to transfer patient participants in the face mask group over to the helmet group. The results, published in JAMA, found that after 90 days, 15 patients in the helmet group died from ARDS, compared to 22 patients in the face mask group. There was also a significant reduction in 90-day mortality for patients using the helmet noninvasive ventilation strategy, the authors wrote.
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