Final answer:
To find the infusion rate in mL/h for neosynephrine at a dosage of 0.03 mg/min with a concentration of 20 mg/500 mL, unit conversion reveals that the nurse should infuse 45 mL/h.
Step-by-step explanation:
The student has asked how many milliliters per hour (mL/h) a nurse will infuse medication with a prescribed dosage of neosynephrine at 0.03 mg/min when the drug's concentration is 20 mg/500 mL. To solve this, the nurse needs to use unit conversion skills.
First, we'll find out how many milligrams are infused per hour:
0.03 mg/min × 60 min/h = 1.8 mg/h.
Since there are 20 mg of neosynephrine in 500 mL of the solution, we need to find out how many mL correspond to 1.8 mg.
(1.8 mg) ÷ (20 mg) = 0.09
0.09 × 500 mL = 45 mL/h.
Therefore, the nurse will infuse 45 mL/h of neosynephrine to deliver the medication at the ordered dosage of 0.03 mg/min.