Rule #1, forget everything you learned in the MICU. Kids are different than adults. Really. Learn the differences, and why.
Sepsis
Hypotension? Give 20mL/kg bolus, repeat up to two more times in the first hour. If refractory, start pressoir
Which pressor? Likely Dopamine. Why Domapine in kids? Must read article:
"Clinical practice parameters for hemodynamic support of pediatric and neonatal patients in septic shock"