mL/hr = (mcg/kg/min × kg × 60) ÷ Concentration (mcg/mL)
Critical-care drips are ordered per weight per minute but pumps run in mL/hr. Multiply the ordered rate by weight and by 60 min/hr, then divide by the bag concentration in mcg/mL so every unit cancels except mL/hr.
What each part means
| mcg/kg/min | Ordered infusion rate |
|---|---|
| kg | Patient weight in kilograms |
| 60 | Minutes per hour |
| Concentration | Bag concentration in mcg/mL |
Worked example
5 mcg/kg/min, 70 kg, 1600 mcg/mL: (5 × 70 × 60) ÷ 1600 = 13.1 mL/hr.