CNA Practice Test
Vital signs and reportingQuestion 1361 of 1700

What should you do about fingernail polish before you use a pulse oximeter on a finger?

  1. Add another coat to protect the nail
  2. Remove it from the nail being used
  3. Use a toe on the same side instead
  4. Ignore it because it does not matter
Show answer

Correct answer: Remove it from the nail being used

Nail polish gives an inaccurate measurement.

Source: Nursing Assistant (Reuter), 7.4: Obtaining Vital Signs

Practice vital signs and reporting

Questions last reviewed: 18 October 2026