Sterile Compounding & Pharmacy Calculations Flashcards
6 cards from real PTCB practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Sterile Compounding & Pharmacy Calculations flashcards as text
What does tonicity refer to in the context of IV fluids?
Answer: The osmotic pressure of a solution relative to blood plasma
Tonicity describes the effective osmotic pressure of a solution relative to plasma (approximately 285–295 mOsm/kg), determining its effect on cell volume.
If an order reads 'KCl 40 mEq in 100 mL NS,' what type of solution is this considered?
Answer: Small-volume parenteral (SVP)
Preparations ≤250 mL are classified as small-volume parenterals (SVPs), commonly called 'piggybacks' (IVPBs).
How many micrograms are in 1 milligram?
Answer: 1,000 mcg
There are 1,000 micrograms (mcg) in 1 milligram (mg).
A drip order is for 500 mL over 4 hours with a drop factor of 20 gtts/mL. What is the drip rate?
Answer: 42 gtts/min
(500 mL × 20 gtts/mL) ÷ (4 hr × 60 min/hr) = 10,000 ÷ 240 ≈ 41.7 ≈ 42 gtts/min.
What PPE is required when handling hazardous drugs during compounding?
Answer: Double gloves, gown, eye protection, and respiratory protection as needed
USP requires double gloves, a chemotherapy-rated gown, eye/face protection, and respiratory protection when handling hazardous drugs.
A 1:1000 epinephrine solution contains how many mg per mL?
Answer: 1 mg/mL
A 1:1000 ratio means 1 g per 1,000 mL = 1 mg/mL.