Question

An IV fluid contains 75 mg of Drug B in 500 ml of the IV fluid. If the patient needs 300 mg of this medication, how much of this IV fluid should be infused

Answer 1

2000ml = 2L of this IV fluid should be infused.

Explanation:

This problem can be solved by a simple rule of three, in which the relationship between the measures is direct, which means that there is a cross multiplication.

The problem states that each 75 mg of the medication contains 500 ml of IV fluid. How many ml of IV fluid are there in 300 mg of the medication?

So

75mg - 500ml

300 mg - x ml

`75x = 300*500`

`x = (300*500)/(75)`

`x = 4*500`

`x = 2000`ml

2000ml = 2L of this IV fluid should be infused.