Sterile Compounding Calculations Flashcards
7 cards from real CSPT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Sterile Compounding Calculations flashcards as text
A pharmacist orders vancomycin 1250 mg in 500 mL NS to infuse over 90 minutes. What is the infusion rate in mL/hr?
Answer: 333 mL/hr
500 mL ÷ 1.5 hr = 333 mL/hr.
A TPN requires 50 g of dextrose. How many mL of D70W (70% dextrose) are needed?
Answer: 71.4 mL
50 g ÷ 0.7 g/mL = 71.4 mL.
A 1-liter bag of NS is infusing via gravity at 20 gtt/min with a 15 gtt/mL drip set. What is the infusion rate in mL/hr?
Answer: 80 mL/hr
20 gtt/min ÷ 15 gtt/mL × 60 min/hr = 80 mL/hr.
You are making a preparation requiring 0.8% benzalkonium chloride. How many mg are needed for 50 mL?
Answer: 400 mg
0.8% = 0.8 g/100 mL = 0.4 g/50 mL = 400 mg.
An antibiotic IVPB contains 750 mg in 100 mL. A dose of 500 mg is prescribed. How many mL should be administered?
Answer: 66.7 mL
500 mg ÷ (750 mg/100 mL) = 66.7 mL.
A solution of calcium gluconate 10% contains how many mg/mL of calcium gluconate?
Answer: 100 mg/mL
10% = 10 g/100 mL = 100 mg/mL.
A compounded preparation calls for 1:10,000 epinephrine. What is the concentration in mcg/mL?
Answer: 100 mcg/mL
1:10,000 = 0.1 mg/mL = 100 mcg/mL.
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