The pharmacy receives the following PN order. Calculate the mL of dextrose 70% that should be added to the PN. (Answer must be numeric; no units or commas; round final answer to the nearest WHOLE number.)

Item/Quantities:

- Dextrose 270 g
- Amino acids 60 g
- Sodium chloride 38 mEq
- Sodium acetate 16 mEq
- Potassium 40 mEq
- Magnesium sulfate 10 mEq
- Phosphate 21 mmol
- Calcium 4.45 mEq
- MVI-12 5 mL
- Trace elements 1 mL
- Vitamin K-1 0.5 mg
- Famotidine 10 mg
- Regular insulin 40 units
- Sterile water qs ad 980 mL

To find out the milliliters of dextrose 70% needed for the PN, we calculate it based on the mass of dextrose ordered and the concentration of the solution, resulting in 386 mL after rounding to the nearest whole number.

Explanation:

To calculate the milliliters of dextrose 70% that should be added to the PN, we need to use the mass of dextrose ordered which is 270 g. Since dextrose 70% solution means 70 g of dextrose is present in every 100 mL of solution, we can set up the following proportion:

70 g dextrose − 100 mL solution
270 g dextrose - x mL solution

Now solve for x:

(70 g)/(100 mL) = (270 g)/(x mL)

x = (270 g * 100 mL) / 70 g

x = 27000 / 70

x = 385.71

Rounded to the nearest whole number, 386 mL of dextrose 70% should be added to the PN.