Question

AB is a newborn baby boy weighing 1900 grams. The MD orders the following: Dopamine 10 mcg/kg/min to run at the rate of .5 mL/hour in NS (Normal Saline)

a. What is the total volume of your final product?

b. How much dopamine (in mg) will you need to compound?

c. How much dopamine (in mL) will you need?

d. How much Normal Saine (in mL) will you need?

Answer 1

a) Ans- From given question, weight=1900grams=1.9kgs.

Dose=10mcg/kg/hr

Rate =5ml/hr

The derived formula in ml of dopamine /hr=0.0015 x weight x dose(mcg/kg/hr)

=0.0015 x 1.9kgs x 10=0.028ml/hr of dopamine =0.03ml/hr

Total rate =5ml/hr then

In the 50ml of syringe, 5-0.03=4.7ml normal saline /hr to infuse so,

50ml syringe to be filled with 49. 7ml NS+0.03ml dopamine to be given.

b)ans- dopamine dose =10mcg/kg/min=10 x1. 9 x60=1140mcg means 1.140mg of dopamine to be compound.

C) ans- from the above equation, we get answer that,

0.03ml of dopamine needed to dilute with normal saline.

d) ans- Here also same as above, 49.7ml of normal saline is mix with dopamine in 50ml syringe.