Appropriate Dosage of Vasopressor in Neonates and Infants

"In the present study, the expected rate of recovery of the internal carotid artery according to the dose of the inotropic agent was similar to that in a previous study in which the fraction maintaining mean arterial pressure within 80% of baseline by dose of inotropic agent was 0.9% for the ephedrine 0.1, 0.6, 0.8, 1. 0, 1.2, and 1.4 doses (mg/kg) were 9.9%, 21%, 41%, 47%, 65.5%, and 40%, respectively (Br J Anaesth. 2023 May;130(5):603-610), and it was assumed that the rate of internal carotid artery recovery by inotrope dose would be 90% of that result.~The study will randomize to dose in six cohorts and will include dose group and cohort variables in a logistic regression model to assess the trend between inotropic dose and rate of carotid revascularization after correcting for cohort effects on the outcome variable."