Question

9. A provider prescribes esmolol 45mcg/kg/min. by continuous IV infusion. The patient weighs 59 kg. Available is 2,500 mg in 250 mL D5W. How many mL/hour should the IV pump be set in order for the patient to get the correct dosage?

10. A nurse is preparing to administer packed RBCs 280 mL to infuse over 4 hours. How many mL per hour should the IV pump be set to run?

11. You are to give haloperidol 1 mg tab every 12 hours (q12h). You have on hand 0.5mg tabs. Calculate the appropriate dosage the patient should receive.

Answer 1

9. A provider prescribes esmolol 45mcg/kg/min. by continuous IV infusion. The patient weighs 59 kg. Available is 2,500 mg in 250 mL D5W. How many mL/hour should the IV pump be set in order for the patient to get the correct dosage?

Answer =15.9ml per hour

Calculations:

Ordered dose of esmolol=45mcg/kg/min=45mcgX59kg=2655mcg/min

Available drug concentration=2500mg/250ml=2500mgX1000=2,500,000mcg/250ml

Lets calculate ordered dose of 2655mcg/min in ML/Hour

2,500,000mcg/2655mcg=250ml/?ML

?ML=(250MLX2655mcg)/2500,000=0.265

ie,2655mcg/mt=0.265ml/mt

ML/hour=0.265X60=15.9ml/hr approximately equal to 16ml per hour.

10. A nurse is preparing to administer packed RBCs 280 mL to infuse over 4 hours. How many mL per hour should the IV pump be set to run?

Answer:70ML/hr

Calculations:

Total volume of RBC=280Ml

Infusion time=4hours

Infusion per hour=Total volume in ML/total time=280/4=70mL/hour

11. You are to give haloperidol 1 mg tab every 12 hours (q12h). You have on hand 0.5mg tabs. Calculate the appropriate dosage the patient should receive.

Answer: 2tablet of 0.5mg every 12hours

Calculations:

Available dose=0.5mg tab

ordered dose= 1mg tab

,ie0.5mg/1mg=1/? tab

? tab=1/0.5mg=2tab every 12hour