CB is receiving 1,150 mL of D30W, 860 mL of Aminosyn 8.5% and 340 mL of Intralipid 10% in his PN. What percentage of the non-protein calories are represented by dextrose? (Answer must be numeric; no units or commas; round the final answer to the nearest WHOLE number.)

To determine the percentage of non-protein calories represented by dextrose in the parenteral nutrition (PN), we need to calculate the total non-protein calories provided by the dextrose and fat, then find the proportion contributed by dextrose.

### Step-by-Step Calculation

1. **Calculate the calories from dextrose (D30W):**
   - D30W means a 30% dextrose solution, which means there are 30 grams of dextrose per 100 mL.
   - Total volume of D30W is 1,150 mL.
   - The number of grams of dextrose in 1,150 mL:
   \[
   \text{Grams of dextrose} = \frac{30}{100} \times 1150 = 345 \text{ grams}
   \]
   - Each gram of dextrose provides 3.4 kcal.
   \[
   \text{Calories from dextrose} = 345 \times 3.4 = 1173 \text{ kcal}
   \]

2. **Calculate the calories from fat (Intralipid 10%):**
   - Intralipid 10% means a 10% lipid emulsion, which is 10 grams of fat per 100 mL.
   - Total volume of Intralipid is 340 mL.
   - The number of grams of fat in 340 mL:
   \[
   \text{Grams of fat} = \frac{10}{100} \times 340 = 34 \text{ grams}
   \]
   - Each gram of fat provides 9 kcal.
   \[
   \text{Calories from fat} = 34 \times 9 = 306 \text{ kcal}
   \]

3. **Calculate the total non-protein calories:**
   \[
   \text{Total non-protein calories} = \text{Calories from dextrose} + \text{Calories from fat}
   \]
   \[
   \text{Total non-protein calories} = 1173 + 306 = 1479 \text{ kcal}
   \]

4. **Calculate the percentage of non-protein calories from dextrose:**
   \[
   \text{Percentage of calories from dextrose} = \left( \frac{\text{Calories from dextrose}}{\text{Total non-protein calories}} \right) \times 100
   \]
   \[
   \text{Percentage of calories from dextrose} = \left( \frac{1173}{1479} \right) \times 100 \approx 79.3
   \]

5. **Round to the nearest whole number:**
   \[
   \text{Rounded percentage} = 79
   \]

### Final Answer
The percentage of the non-protein calories represented by dextrose is **79**.

Would you like a more detailed explanation or have any questions about the steps?

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Here are 5 related questions that might interest you:
1. How do you calculate protein calories in a parenteral nutrition solution?
2. What are the roles of dextrose, amino acids, and lipids in parenteral nutrition?
3. How do you convert between different types of nutritional solutions (e.g., D10W, D30W)?
4. What are the considerations for determining caloric needs in clinical nutrition?
5. How do you calculate the total fluid intake from a parenteral nutrition regimen?

**Tip:** Always double-check the concentration of each component in parenteral nutrition to ensure accurate calculations.

Find out how to calculate the percentage of non-protein calories represented by dextrose in parenteral nutrition. This example uses D30W, Aminosyn 8.5%, and Intralipid 10%, providing a detailed, step-by-step breakdown. Ideal for advanced students and professionals working on nutrition-related problems.

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