CSPT CSPT - Compounded Sterile Preparation Technician Parenteral Nutrition and IV Admixture Preparation Questions and Answers 4

Question 1

Which electrolyte is most critical to monitor in patients receiving long-term total parenteral nutrition (TPN) due to the risk of refeeding syndrome?

Accepted Answer

Phosphate

Answer

Phosphate drops precipitously during refeeding syndrome as cells take up phosphate rapidly during anabolism, making it the most critical electrolyte to monitor.

Question 2

When preparing a TPN admixture, dextrose is added before lipid emulsion in a 3-in-1 (total nutrient admixture) primarily to:

Accepted Answer

Maintain appropriate pH to stabilize the emulsion

Answer

Adding dextrose before lipid emulsion helps maintain an appropriate pH environment that stabilizes the lipid emulsion and prevents cracking.

Question 3

A pharmacist requests 500 mL of a 0.45% NaCl solution. You have 1 L bags of 0.9% NaCl and SWFI. How much 0.9% NaCl and SWFI are needed?

Accepted Answer

250 mL NaCl + 250 mL SWFI

Answer

Using the dilution equation C1V1=C2V2: (0.9%)(V1) = (0.45%)(500 mL), so V1 = 250 mL of 0.9% NaCl and 250 mL of SWFI.

Question 4

Which component of a TPN formulation is most likely to cause vein irritation and thrombophlebitis when administered via a peripheral IV line?

Accepted Answer

High-concentration dextrose

Answer

High-concentration dextrose (>10%) is hyperosmolar and causes phlebitis and vein damage, which is why central venous access is required for most TPN formulations.

Question 5

When visually inspecting a lipid-containing TPN (3-in-1) admixture, which finding indicates the emulsion has CRACKED and must be discarded?

Accepted Answer

Separation into a visible oil layer on top

Answer

A visible layer of oil separated on top indicates the emulsion has cracked (irreversibly destabilized) and cannot be safely administered.

CSPT - Compounded Sterile Preparation Technician Practice Test

CSPT - Compounded Sterile Preparation Technician Practice Test

CSPT CSPT - Compounded Sterile Preparation Technician Parenteral Nutrition and IV Admixture Preparation Questions and Answers 4