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NCCT CERTIFICATION FINAL EXAM PREP LATEST QUESTIONS WITH CORRECT DETAILED ANSWERS/ GRADED A+
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NCCT CERTIFICATION FINAL EXAM PREP LATEST QUESTIONS WITH CORRECT DETAILED ANSWERS/ GRADED A+
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NCCT CERTIFICATION FINAL EXAM PREPLATEST 2024- 2025 QUESTIONS WITH CORRECT
DETAILED ANSWERS/ GRADED A+
Which of the following tests can be collected by capillary puncture? (Select the two (2)
correct answers.)
A. blood cultures
B. blood gas
C. bilirubin
D. erythrocyte sedimentation rate
E. PTT - Correct Answer - blood gas, bilirubin
Rationale
Collecting blood samples by capillary (dermal) puncture is an alternative to venipuncture
when a small amount of blood is needed and the procedure is appropriate for the test
requested. Blood gasses and bilirubin determinations may be done with this method.
Blood cultures and erythrocyte sedimentation rates (ESR) require a larger amount of
blood. Coagulation tests that require plasma specimens such as the PTT are not done
by dermal puncture.
If alcohol is used to decontaminate the capillary puncture site, which of the following
should the phlebotomist do?
A. Use two alcohol pads for cleaning.
B. Dilute the strength of the alcohol.
C. Wipe away the 2nd drop after the puncture.
pg. 1
,D. Allow the site to air dry before the puncture. - Correct Answer - Allow the site to air
dry before the puncture.
Rationale
When performing a capillary (dermal) blood collection, it is necessary to allow the
alcohol used for cleansing the site to completely dry before making the puncture. If the
area is wet, it will be more painful to the patient, contaminate the blood sample, and
cause hemolysis of the red blood cells. A wet site also prevents the formation of a
rounded drop because blood will mix with the alcohol, running down the finger and
making it harder to collect. The first drop of blood is wiped away as it would be
contaminated with tissue fluid. Diluting the strength of the alcohol will make it less
effective. Two alcohol pads are not required.
Which of the following is the correct order for filling micro collection tubes when multiple
tests are ordered?
A. EDTA, non-additive tubes, other additive tubes
B. non-additive tubes, EDTA, other additive tubes
C. EDTA, other additive tubes, non-additive tubes
D. non-additive tubes, other additive tubes, EDTA - Correct Answer - EDTA, other
additive tubes, non-additive tubes
Rationale
The order of drawn for dermal punctures is different than for venipuncture. Since there
is no risk of "carryover" of additives with which to be concerned , the CBC (EDTA) tube
should be collected first as it presents the most likely to form clots. Then other additive
tubes such as heparin and sodium fluoride. It is important to continually mix the additive
tubes while performing the procedure. Serum tubes (red or gold with no anticoagulant)
are collected last as clots forming in these will not matter.
A phlebotomist is tasked with drawing a STAT CBC and a CMP. After palpation, no veins
can be felt and there are no visible veins on the back of the hand. The phlebotomist
decides to perform a capillary stick. Which of the following microtainers should the
phlebotomist choose?
A. 1 polymer gel and 1 without an additive.
pg. 2
,B. 1 EDTA and 1 heparin.
C. 1 polymer gel and 1 EDTA.
D. 1 heparin and 1 without an additive. - Correct Answer - 1 EDTA and 1 heparin.
Rationale
If there are no veins available for venipuncture and a smaller amount of blood can be
used for the tests requested, a capillary collection may be appropriate. A lavender
(EDTA) microtainer would be used for the CBC and drawn first. Since the request is
STAT, the CMP would be drawn in heparin as this tube could be immediately centrifuged
and resulted quickly. The polymer gel or non additive tube would have to be allowed to
clot, adding to the result turn around time.
The doctor has ordered a fecal occult blood specimen to be collected by the patient.
Which of the following preparatory instructions should the phlebotomist give the patient?
A. Consume 8 ounces of fiber before collection.
B. Avoid taking vitamin C prior to collection.
C. Stop taking prescription medication 12 hours prior to collection.
D. Fast for eight hours before collection. - Correct Answer - Avoid taking vitamin C prior
to collection.
Rationale
Many laboratory tests have special instructions to be followed by the patient in order to
help produce accurate results. For fecal occult blood (FOB) tests it is necessary to avoid
ingesting vitamin C for 72 hours as this may cause a false positive test. Fasting,
consuming 8 oz of fiber or stopping prescription medications do not affect the test and
may be contraindicated.
While providing patient education on 24-hour urine collection for creatinine clearance, it
is imperative to tell the patient
A. to keep the specimen refrigerated at all times.
B. to maintain particular dietary restrictions.
C. start collection 96 hours after any procedure using contrast dye.
pg. 3
, D. to avoid laxatives during the collection process. - Correct Answer - to keep the
specimen refrigerated at all times.
Rationale
For accurate results, a urine specimen for 24 hr analysis should be kept refrigerated
during the collection. Refrigeration prevents the analytes in the specimen from
deteriorating at room temperature. Maintenance of dietary restrictions and the clearance
of contrast dye are important for certain tests. The avoidance of laxatives helps ensure
the specimen will not be contaminated with stool.
Which of the following are required for a sputum collection?
A. sterile cup, 24 hour collection
B. plastic transport cup, immediate delivery to lab
C. sterile cup, immediate delivery to lab
D. plastic transport cup, 24-hour collection - Correct Answer - sterile cup, immediate
delivery to lab
Rationale
Sputum specimens are collected into sterile cups and quickly delivered to the lab when
a bacterial infection such as bronchitis or pneumonia are suspected. If the container is
not sterile, other contaminating organisms may cause a false positive result. Failure to
transport to the lab in a timely fashion may cause the loss of bacteria and a false
negative culture result. A random sample is usually used, not a 24-hour collection.
After a course of antibiotics for a UTI a patient returns for a follow up urinalysis. The
order calls for a midstream clean catch specimen. In order to prevent contamination, the
phlebotomist should provide the patient with which of the following antiseptics?
A. iodine wipes
B. castile soap wipes
C. betadine wipes
D. alcohol wipes - Correct Answer - castile soap wipes
Rationale
pg. 4
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