Fig. 3From: Carboxyhemoglobin predicts oxygenator performance and imminent oxygenator change in extracorporeal membrane oxygenationAssociation of COHb with time to oxygenator change based on an unadjusted hierarchical linear mixed-effects model of log(COHb)—COHb expressed as fraction of total Hb. COHb was logarithmically transformed for modeling purposes, and backtransformed for plotting purposes in order to improve interpretabilityBack to article page