The inadequate oxygen delivery (IDo2) index is used to estimate the probability that a patient is experiencing inadequate systemic delivery of oxygen. Its utility in the care of critically ill children with sepsis is unknown.


To evaluate the relationship between IDo2 dose and major adverse events, illness severity metrics, and outcomes among critically ill children with sepsis.


Clinical and IDo2 data were retrospectively collected from the records of 102 critically ill children with sepsis, weighing >2 kg, without preexisting cardiac dysfunction. Descriptive, nonparametric, odds ratio, and correlational statistics were used for data analysis.


Inadequate oxygen delivery doses were significantly higher in patients who experienced major adverse events (n = 13) than in those who did not (n = 89) during the time intervals of 0 to 12 hours (P < .001), 12 to 24 hours (P = .01), 0 to 24 hours (P < .001), 0 to 36 hours (P < .001), and 0 to 48 hours (P < .001). Patients with an IDo2 dose at 0 to 12 hours at or above the 80th percentile had the highest odds of a major adverse event (odds ratio, 23.6; 95% CI, 5.6-99.4). Significant correlations were observed between IDo2 dose at 0 to 12 hours and day 2 maximum vasoactive inotropic score (ρ = 0.27, P = .006), day 1 Pediatric Logistic Organ Dysfunction (PELOD-2) score (ρ = 0.41, P < .001), day 2 PELOD-2 score (ρ = 0.44, P < .001), intensive care unit length of stay (ρ = 0.35, P < .001), days receiving invasive ventilation (ρ = 0.42, P < .001), and age (ρ = −0.47, P < .001).


Routine IDo2 monitoring may identify critically ill children with sepsis who are at the highest risk of adverse events and poor outcomes.

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