CMT Laboratory Procedures and Specimen Collection 2

Question 1

The preferred method for collecting a urine specimen for routine urinalysis and culture is:

Accepted Answer

Midstream clean-catch

Answer

First-morning random void

Answer

Catheterized specimen via suprapubic tap

Answer

24-hour collection

Question 2

A 24-hour urine collection should be stored at which condition during the collection period?

Accepted Answer

Refrigerated at 2–8°C or with a specified preservative

Answer

Room temperature with no preservative

Answer

Frozen at –20°C throughout collection

Answer

Warmed to body temperature

Question 3

On a urine dipstick, a positive nitrite result suggests the presence of:

Accepted Answer

Gram-negative bacterial infection

Answer

Renal calculi

Answer

Glucose in the urine

Answer

Blood in the urine

Question 4

When collecting a stool specimen for occult blood testing, the patient should avoid which food for 3 days before collection?

Accepted Answer

Red meat and raw broccoli

Answer

White rice

Answer

White bread

Answer

Low-fat dairy products

Question 5

Which technique is used to collect a throat culture for Group A Streptococcus?

Accepted Answer

Swab the tonsils and posterior pharynx while avoiding the tongue and teeth

Answer

Swab the inner cheeks and gumline

Answer

Insert the swab into the nasopharynx

Answer

Swab the anterior nares bilaterally

Question 6

A sputum specimen for culture should ideally be collected:

Accepted Answer

First thing in the morning before eating or brushing teeth

Answer

After a full meal to maximize secretions

Answer

After vigorous exercise

Answer

At bedtime following oral hygiene

Question 7

A wound culture specimen should be collected from which area of the wound for the most accurate results?

Accepted Answer

The deepest cleanest tissue at the wound base after cleansing

Answer

The wound edge or surrounding skin

Answer

The exudate on the wound surface before cleansing

Answer

Multiple swabs of all necrotic tissue