CNA Certification (Written Exam)Infection Control and SafetyHard
A nurse aide is documenting a resident's intake and output (I&O). The resident drank 6 ounces of juice, 4 ounces of milk, and had 8 ounces of soup. How many milliliters (mL) of fluid intake should the nurse aide record?
- A240 mL
- B540 mL
- C180 mL
- D360 mL
Show answer & explanationAnswer & explanation
Correct answer: B. 540 mL
First, sum the total ounces: 6 oz (juice) + 4 oz (milk) + 8 oz (soup) = 18 oz. Then, convert ounces to milliliters using the conversion factor: 1 ounce = 30 mL. So, 18 oz * 30 mL/oz = 540 mL.
Why the other options are wrong
- A. Incorrect calculation (e.g., 8 oz * 30 mL = 240 mL, but this only accounts for soup).
- C. Incorrect calculation (e.g., 6 oz * 30 mL = 180 mL, but this only accounts for juice).
- D. Incorrect calculation (e.g., 18 oz * 20 mL/oz = 360 mL, or some other error).
Fluid Intake Conversion (oz to mL)
To accurately record fluid intake, ounces must be converted to milliliters using the standard conversion factor of 1 ounce = 30 mL.
- 1 ounce (oz) = 30 milliliters (mL).
- All liquids consumed are counted as intake.
- Accurate I&O is crucial for fluid balance monitoring.
Memory trick: Ounces to Milliliters? Multiply by Thirty, My Love!