Dosage calculation RN Proctored exam herzing university ( 14 Questions)
A client is receiving Phenylephrine IV at 160 mL/hr. It is available as Phenylephrine IV 300 mg in 500 mL D5W. What is the flow rate in mg/min? Round to the nearest tenths place where applicable and enter numeric value only (no commas or labels) ________ mg/min
Correct Answer: 1.6
Step 1 is to identify the available concentration of the medication
Available concentration = Total mg ÷ Total mL
Available concentration = 300 ÷ 500
300 ÷ 500 = 0.6 mg/mL
Step 2 is to calculate the dosage delivered per hour
mg per hour = mL/hr × mg/mL
mg per hour = 160 × 0.6
160 × 0.6 = 96 mg/hr
Step 3 is to calculate the dosage delivered per minute
mg per minute = mg/hr ÷ 60 minutes
mg per minute = 96 ÷ 60
96 ÷ 60 = 1.6 mg/min
Step 4 is to round to the nearest tenth
1.6 = 1.6
Answer: 1.6
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