**Dosage Calculation 4.0 Parenteral (IV) Medications Test**

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A nurse is preparing to administer dextrose 5% in water (D5W) 1 L IV to infuse over 12 hr. The drop factor of the manual IV tubing is 15 gtt/mL. The nurse should set the manual IV infusion to deliver how many gtt/min? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

gtt/min

To solve this problem, we need to calculate the flow rate in drops per minute (gtt/min). The formula to calculate the flow rate is:

\[
\text{Flow rate (gtt/min)} = \left(\frac{\text{Total volume (mL)}}{\text{Time (min)}}\right) \times \text{Drop factor (gtt/mL)}
\]

Given:
- Total volume = 1 L = 1000 mL
- Time = 12 hours = 12 × 60 minutes = 720 minutes
- Drop factor = 15 gtt/mL

Now, we substitute these values into the formula:

\[
\text{Flow rate (gtt/min)} = \left(\frac{1000 \text{ mL}}{720 \text{ min}}\right) \times 15 \text{ gtt/mL}
\]

\[
\text{Flow rate (gtt/min)} = \left(\frac{1000}{720}\right) \times 15
\]

\[
\text{Flow rate (gtt/min)} \approx 1.39 \times 15
\]

\[
\text{Flow rate (gtt/min)} \approx 20.83 \text{ gtt/min}
\]

Rounding to the nearest whole number:

\[
\text{Flow rate (gtt/min)} = 21 \text{ gtt/min}
\]

The nurse should set the manual IV infusion to deliver **21 gtt/min**.

Would you like further details or have any questions about this calculation?

Here are five related questions that might help expand your understanding:
1. How would the flow rate change if the drop factor was 10 gtt/mL instead of 15 gtt/mL?
2. What would be the flow rate if the IV was to be infused over 6 hours instead of 12 hours?
3. How do you calculate the flow rate for microdrip tubing with a drop factor of 60 gtt/mL?
4. What is the importance of rounding in medication dosage calculations?
5. How does a manual IV infusion differ from an automated one?

**Tip:** Always double-check your calculations, especially when rounding, as even small errors can impact patient care significantly.

Learn how to calculate the infusion rate for dextrose 5% in water (D5W) IV administration. Solve for the flow rate in drops per minute (gtt/min) using the given parameters: 1000 mL total volume, 12 hours infusion time, and a drop factor of 15 gtt/mL. Round the answer to the nearest whole number. Detailed step-by-step solution provided.

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