Question

A TPN order is to contain 1 mg of folic acid per 1000 cc of TPN. If the stock vial of folic acid contains 5 mg/ml, what volume would be required to prepare 3000 ml of TPN?

Answer 1

Answer:

0.6 ml

Explanation:

let x = the mg needed for 3000 ml

$\frac{1mg}{1000 ml}$  = $\frac{xmg}{3000ml}$

x = $\frac{3000mg}{1000}$

x = 3 mg

$\frac{3mg}{y}$ = $\frac{5mg}{1ml}$ where y = the volume of the vial needed for 3000 ml of TPN

y = $\frac{3ml}{5}$

y = 0.6 ml

Answer 2

Answer:

In this calculation, to find the volume of folic acid required to prepare 3000 ml of TPN?

recall, 1 mg of folic acid per 1000cc of TCN,

Then, x mg of folic acid per 3000 cc = 3mg

Similarly, For 5mg of folic acid per 1 ml of TCN

Then,  3mg of folic acid per y ml of TCN = 0.6ml

0.6ml of folic acid would be required to prepare 3000 ml of TPN