Question

2. The nurse has received an order to start an infusion of Pronestyl at 2 mg/min ior her patient. Pronestyl is available as 500 mg in 250 ml DSW. Calculate the rate of the infusion in ml/hr. 3. The physician has ordered IV Cardizem at 10 mg/hr for a patient who has been admitted for atrial fibrillation. Cardizem is available as 125 mg in 125 ml NS. Calculate the rate of the infusion in ml/hr. 4. The physician has ordered Nipride at 3 mcg/kg/min for a patient who weighs 180 lbs. Nipride is available as 50 mg in 250 ml DSW. Calculate the rate of the infusion in ml/hr. 5. The physician has ordered Dobutamine at 5 mcg/kg/min for a patient who weighs 134 lbs. The Dobutamine is available as 500 mg in 250 ml D5W. Calculate the infusion rate in ml/hr.

Answer 1

2. Ordered dose of Pronestyl is 2mg/min

Available Pronestyl concentration is 500mg in 250ml D5W

Rate of infusion to be calculated

Flow rate = Total volume / Total time

Using unitary method :

500 mg of Pronestyl is available in 250ml

1mg of Pronestyl will be available in 250/500

Then 2mg of Pronestyl will be available in 250/500× 2

= 1ml of available concentration has to be taken

Flow rate = 1ml / 0.0167hr = 62.5 ml/hr

3. Ordered dose of cardizem is 10mg/hr

Available cardizem is 125mg in 125ml NS

Flow rate to be calculated

Using unitary method:

125 mg of cardizem is available in 125ml of NS

1mg of cardizem is available in 125/125

Then 10mg of cardizem will be available in 125/125× 10

= 10ml of the available concentration has 10mg of cardizem

Flow rate = Total volume/total time

= 10ml/ 1 hour

= 10ml /hr

4. Ordered dose of Nipride is 3mcg/ kg/min = 0.003mg/kg

= 0.243mg

Weight of the patient is180lbs = 81kg

Available Nipride is 50mg in 250ml D5W

Using unitary method :

50mg of Nipride is available in 250ml NS

1mg of Nipride will be available in 250/50

Then 0.243mg of Nipride will be available in 250/50× 0.243

= 1.2 ml of available concentration has to be taken

Flow rate = total volume /total time

= 1.2ml/ 1hour

= 1.2ml/hr

5. Ordered dose of dobutamine is 5mcg/kg/min= 0.005mg/kg

= 0.3015

Weight of the patient is 134lbs = 60.3kg

Available dobutamine is 500mg in 250ml of NS

Using unitary method:

500mg of dobutamine is available in 250ml

1mg of dobutamine is available in 250/500

Then 0.3015 mg of dobutamine will be available in 250/500×0.3015

= 0.15 ml/hr