PRACTICE PROBLEMS ON IV MEDICATIONS AND TOTAL PARENTERAL NUTRITION
To calculate for the infusion time:
To calculate flow rate in drops/min:
1. A prescription requires 7,500 units (U) of heparin. Heparin vials containing 1,000 U per milliliter are available in the pharmacy. What volume of heparin injection should be added to the IV solution to provide 7,500 U?
2. A 200-mg dose of cimetidine is prescribed. It is available in the pharmacy in 300 mg/2 mL vials. What volume should be withdrawn from the vial to provide a 200-mg dose?
3. A prescription for 1 L of an admixture to be infused over a period of eight hours is received. If the administration set delivers 10 drops per milliliter, what infusion rate, in drops per minute, should appear on the label of the admixture?
4. A prescription is received for drug additives in 500 mL of 8% dextrose injection. No solution of 8% dextrose injection is available, but 500-mL bags of 5%, 10%, 20%, and 50% dextrose injection are available. How can 8% dextrose injection can be prepared?
5. A prescription is received for 1 L of a parenteral nutrition solution with a final concentration of 15% dextrose. The physician specifies that 500 mL is to be an amino acid solution. The pharmacy has 50% dextrose injection in 500-mL bags. How would this prescription be prepared?
6. Tobramycin may be administered to neonates at a dose of up to 4 mg/Kg/day in two equal doses every 12 hours. One kilogram = approximately 2.2 lb. Tobramycin is available in a pediatric vial with a concentration of 20 mg/2mL. If the neonate weighs 4.0 lb, what volume of tobramycin should be withdrawn for the dose described above?
TOTAL PARENTERAL NUTRITION (TPN)
1. Determine Total Fluid Requirement (TFR).
≤ 10 Kg
1st 10 Kg
1st 20 Kg
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