IV Medication Calculation Questions

Order: Pepcid 10 mg IVPB q 12 h.

Supply: Pepcid 10mg/mL in a 5mL single use vial

Instructions: Use NS 100 mL IV bag. Infuse over 30 minutes via an infusion pump.

 

What is the infusion rate per hour (ml/hr) for the IV pump?

                           

Order:  Pepcid 10mg IV bolus now.

Supply: Pepcid 10mg/mL in a 2 mL ampule

             : Stock 10mL syringe of Normal Saline

Instructions: For IV bolus, Pepcid needs to be diluted in NS for a total volume of 10mL. Dose needs to be injected over 2 minutes

 

After figuring out how much Pepcid to be added-

What is the volume of NS for the syringe?

A nurse is preparing to administer lactated Ringer's 400 mL IV bolus to infuse over 3 hr. The drop factor of the manual IV tubing is 20 gtt/mL. The nurse should set the manual IV infusion to deliver how many gtt/min?

A nurse is preparing to administer 0.9% sodium chloride 1,000 mL IV to infuse over 8 hr. The nurse should set the IV pump to deliver how many mL/hr?

A nurse is preparing to administer amantadine 150 mg PO every 12 hr. Available is amantadine 50 mg/5 mL syrup. How many mL should the nurse administer per dose?

A nurse is preparing to administer aspirin 650 mg PO every 12 hr. The amount available is aspirin 325 mg tablets. How many tablets should the nurse administer?

A nurse is preparing to administer clindamycin 300 mg by intermittent IV bolus over 30 min. Available is clindamycin premixed in 50 mL 0.90% sodium chloride (NaCl). The nurse should set the IV pump to deliver how many mL/hr?

Answer explanation

Step 1: What is the unit of measurement the nurse should calculate? mL/hr

Step 2: What is the volume the nurse should infuse? 50 mL

Step 3: What is the total infusion time? 30 min

Step 4: Should the nurse convert the units of measurement? Yes (min does not equal hr)

60 min30 min  =  1 hrhr

X hr = 0.5 hr

Step 5: Set up an equation and solve for X.

mL/hr  =  

50 mLmL/hr  =  0.5 hr

X mL/hr = 100 mL/hr

Step 6: Round if necessary.

Step 7: Reassess to determine whether the amount to administer makes sense. If the prescription reads clindamycin 300 mg in 50 mL 90% NaCl by IV intermittent bolus to infuse over 30 min, it makes sense to administer it at 100 mL/hr. The nurse should set the IV pump to deliver clindamycin 300 mg in 50 mL 0.90% NaCl IV at 100 mL/hr.

A nurse is preparing to administer Ringer's lactate 500 mL IV bolus to infuse over 3 hr. The drop factor of the manual IV tubing is 20 gtt/mL. The nurse should set the manual IV infusion to deliver how many gtt/min?

A nurse is caring for an adolescent client who has pneumonia and a prescription for cefpodoxime 5 mg/kg/dose given every 12 hours. The client weighs 88 lb. How many mg should the nurse administer per dose?

A nurse is caring for an infant who weighs 12 lb and is prescribed cefuroxime sodium 15mg/kg/dose given every 12 hours. Available is cefuroxime sodium oral solution 125mg/5mL. How many mL should the nurse administer per dose?