#1
Why is it important to follow proper labeling procedures for specimens?
All of the above
ExplanationEnsures accurate identification, tracking, and results interpretation.
#2
What is the primary reason for using a tourniquet during venipuncture?
To facilitate blood flow and aid in vein visualization
ExplanationIncreases venous pressure and dilates veins.
#3
Which of the following is a suitable antiseptic for cleaning the site before venipuncture?
70% isopropyl alcohol
ExplanationEffective against skin flora without causing irritation.
#4
Which of the following is a suitable method for collecting a urine sample for culture?
Collect urine midstream
ExplanationMinimizes contamination from urethra or external genitalia.
#5
What is the preferred specimen for diagnosing malaria?
Capillary blood
ExplanationHigher parasite concentration in capillary blood.
#6
What is the recommended method for collecting a throat swab specimen for streptococcal culture?
Gently swabbing the posterior pharynx and tonsillar area
ExplanationMaximizes recovery of organisms without trauma.
#7
Which of the following tubes is used for collecting blood for a complete blood count (CBC)?
Lavender-top tube
ExplanationContains EDTA to prevent clotting.
#8
Which of the following specimens should be collected first during a multiple specimen collection process?
Blood cultures
ExplanationMinimizes contamination from other samples.
#9
What is the appropriate method for collecting a wound swab specimen?
Gently swabbing the wound surface with a sterile swab
ExplanationReduces contamination and trauma to wound.
#10
Which of the following specimens is typically collected in a blue-top tube?
Plasma for coagulation studies
ExplanationContains sodium citrate to prevent clotting.
#11
What is the recommended method for collecting a sputum sample for acid-fast bacilli (AFB) testing?
Collecting the first morning sputum
ExplanationContains higher concentration of pathogens.
#12
What is the recommended method for collecting a wound culture specimen?
Swabbing the wound surface with a cotton-tipped applicator
ExplanationMaximizes recovery of organisms.
#13
What is the appropriate method for collecting a stool sample for ova and parasite (O&P) examination?
Placing the sample in formalin immediately
ExplanationPreserves morphology of parasites.
#14
What is the recommended method for collecting a stool sample for Clostridium difficile testing?
Collecting the sample in a container with Cary-Blair transport medium
ExplanationMaintains viability of C. difficile.
#15
Which of the following is an appropriate step to take if a blood sample clots during collection?
Discard the sample and recollect
ExplanationPrevents erroneous results from clot interference.
#16
What is the appropriate technique for collecting a blood culture specimen?
Disinfecting the site with alcohol and allowing it to air dry before collection
ExplanationMinimizes risk of contamination.
#17
Which of the following anticoagulants is commonly used for collecting blood samples for coagulation studies?
Sodium citrate
ExplanationPrevents blood clotting by chelating calcium.
#18
Which of the following specimens requires chilling during transportation?
Serum for glucose testing
ExplanationPrevents glycolysis which can alter glucose levels.
#19
Which of the following is a suitable preservative for stool specimens in parasitology testing?
Formalin
ExplanationPreserves morphology of parasites.
#20
What is the appropriate action if a blood sample needs to be transported but cannot be delivered to the laboratory immediately?
Place the sample on ice packs
ExplanationSlows metabolic processes and minimizes cell degradation.
#21
Which of the following is a critical step in collecting a blood gas sample?
Removing air bubbles from the syringe
ExplanationEnsures accurate gas composition analysis.
#22
What is the recommended method for collecting a cerebrospinal fluid (CSF) sample?
Collecting CSF in a sterile container after the lumbar puncture needle is inserted
ExplanationMinimizes risk of contamination.
#23
Which of the following specimens requires protection from light during collection and handling?
Serum for vitamin B12 assay
ExplanationPrevents degradation of light-sensitive compounds.
#24
Which of the following additives is commonly found in gray-top tubes used for glucose testing?
Potassium oxalate
ExplanationPrevents glycolysis.
#25
What is the primary purpose of collecting a sputum sample for cytology?
To determine the presence of cancer cells
ExplanationAids in diagnosis and staging of lung cancer.