CNA CNA Medical Lab and Specimen Collection Skills 4

Question 1

A resident needs a clean-catch midstream urine specimen. Which instruction should the CNA give first?

Accepted Answer

Clean the urethral area with the provided wipes before urinating

Answer

The perineal area must be cleaned with antiseptic wipes before collection to prevent contamination of the specimen.

Question 2

When collecting a stool specimen for occult blood testing, the CNA should avoid which of the following?

Accepted Answer

Collecting the sample after the resident ate red meat recently

Answer

Red meat consumption before fecal occult blood testing can cause a false-positive result, so dietary restrictions must be followed.

Question 3

A urine specimen must be sent to the lab but will not be transported for 30 minutes. The CNA should:

Accepted Answer

Refrigerate the specimen until transport

Answer

Urine specimens not transported immediately should be refrigerated to prevent bacterial growth and specimen degradation.

Question 4

While collecting a sputum specimen, the CNA notices the resident has produced only saliva. The CNA should:

Accepted Answer

Ask the resident to rinse with water and try again with a deep cough

Answer

Sputum must come from the lower airways via a deep cough; saliva is not an acceptable sputum specimen and the collection should be repeated.

Question 5

A 24-hour urine collection is in progress. The resident voids at 2 PM and the urine is accidentally discarded. What should the CNA do?

Accepted Answer

Notify the nurse, as the 24-hour collection may need to restart

Answer

A discarded specimen during a 24-hour urine collection compromises accuracy, so the nurse must be notified and the collection typically restarted.

CNA Practice Test