Allocation of scarce critical care resources during public health emergencies: which ethical principles support decision making

Aim: To investigate whether and how ten ethical principles are mentioned within documents on critical care resources allocation during public health emergencies. Materials and Methods: We conducted a search of documents con-cerning critical resources allocation during public emergencies publicly available from Google and two specific international websites, up to November 2020. Each document was analyzed by two independent reviewers to assess whether a reference to any of the 10 key ethical principles indicated by the Northern Italy Ethical Committee could be found in the documents. Cohen's K statistic was used. Results: We obtained 34 documents, of which 19 were allocation frameworks, 15 crisis standards of care, 4 clinical triage protocol, 3 clinical guidelines and 2 public health emergency response plans. The principles most frequently mentioned as important for decision-making was "number of lives saved", followed by "transparency", "equity", "respect of person and their autonomy". The most cited tiebreakers were "younger first/life cycle" and "lottery". Conclusions: All documents aim to protect the life and health of the largest number of people and should be objective, ethical, transparent, applied equitably, and be publicly disclosed. It is plausible that short- and long-term prognostic tools can help allocate critical resources, but it remains strong that the decision-making process must be guided by a multi-principle ethical model that is not always easy to apply.