Ati Dosage calculation RN fundamentals assessment 3.2 ( 35 Questions)
A nurse is preparing to administer lidocaine 200 mg IM stat and repeat in 60 min. Available is lidocaine injection 300 mg/3 mL. How many mL should the nurse administer per dose? (Round the answer to the nearest whole number. Use a leading, zero if it applies. Do not use a trailing zero.)
Correct Answer: 2
1. Identify the desired dose:
- The physician has ordered lidocaine 200 mg per dose.
2. Identify the concentration of the available medication:
- The available lidocaine injection is 300 mg in 3 mL. This means the concentration is 300 mg / 3 mL.
3. Calculate the volume needed to deliver the desired dose using the formula:
- Desired Dose (mg) / Available Concentration (mg/mL) = Volume to Administer (mL)
4. Calculate the available concentration in mg/mL:
- Available Concentration = 300 mg / 3 mL = 100 mg/mL
5. Plug the values into the formula:
- Volume to Administer = 200 mg / 100 mg/mL
6. Solve for the volume to administer:
- Volume to Administer = 2 mL
7. Round the answer to the nearest whole number:
- The calculated volume is already a whole number (2).
8. Apply leading zero if it applies:
- A leading zero is not needed as the answer is a whole number greater than or equal to 1.
9. Ensure no trailing zero is used:
- The answer is 2, with no trailing zero.
Answer: The nurse should administer 2 mL per dose.
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