Question

When making 2-in-1 parenteral nutrition, the pharmacy uses D50% w/v. How many milliliters of D50% are required to prepare LB's parenteral nutrition order? (Answer must be numeric; no units or commas; round the final answer to the nearest WHOLE number.)

Answer 1

Without specific information on the desired final concentration and volume of LB's parenteral nutrition solution, we cannot determine the exact volume of D50% needed. For accurate preparation, pharmacists use the dilution formula involving concentration and volume, demonstrating the importance of detailed prescription information to ensure safe and effective patient care.

Step-by-step explanation:

To determine the volume of D50% solution needed for LB's parenteral nutrition order, we need additional information related to her specific nutritional requirements or the desired final concentration and volume of the parenteral nutrition solution. The provided references discuss the dilution of a 10% KCl stock solution to achieve a 0.50% KCl solution, and the molarity calculation for different solutions, but they don't provide enough information to solve this particular problem involving D50% w/v without knowing the desired final concentration and volume of the parenteral nutrition. In pharmacy practice, such dilutions are crucial and must be conducted with precision to ensure patient safety.

Using the dilution formula (C1)(V1) = (C2)(V2), where C1 and V1 are the concentration and volume of the stock solution, and C2 and V2 are the concentration and volume of the final solution, we can solve for V1 once we know the required C2 and V2. This formula is a direct application of the conservation of mass, assuming a 1-to-1 conversion between percentage concentration and the w/v concentration in parenteral nutrition preparation.