A 66-pound patient is to receive 0.4 mEq/kg of a drug. The drug available in 2 mEq/4 mL.
How many mL will the nurse administer? Round to the nearest tenth.

To determine the amount of the drug in mL that the nurse should administer, follow these steps:

1. **Convert the patient's weight from pounds to kilograms**:
   \[
   66 \, \text{pounds} \times \frac{1 \, \text{kg}}{2.2 \, \text{pounds}} = 30 \, \text{kg}
   \]

2. **Calculate the total mEq needed**:
   \[
   \text{Dose} = 0.4 \, \text{mEq/kg} \times 30 \, \text{kg} = 12 \, \text{mEq}
   \]

3. **Determine the volume (in mL) of the drug to be administered**:
   The drug concentration is 2 mEq per 4 mL. To find the mL needed for 12 mEq:
   \[
   \text{Volume} = \left(\frac{12 \, \text{mEq}}{2 \, \text{mEq/4 mL}}\right) \times 4 \, \text{mL} = 24 \, \text{mL}
   \]

Therefore, the nurse should administer **24.0 mL** of the drug.

Do you need any further details or have questions?

### Related Questions:
1. How do you convert between pounds and kilograms?
2. What is the significance of mEq in drug dosage calculations?
3. How do you round numbers to the nearest tenth in medical calculations?
4. What factors might affect drug dosage in pediatric patients?
5. How do you calculate drug concentrations for different units?

**Tip:** Always double-check your calculations in medical dosages to avoid errors that could impact patient safety.

Learn how to calculate drug dosage for a 66-pound patient requiring 0.4 mEq/kg of a drug available in 2 mEq per 4 mL. Follow a step-by-step solution to determine the amount of drug in mL to be administered, rounded to the nearest tenth. Understand the importance of unit conversion and dosage proportion in medical calculations.

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