MLS ASCP EXAM 2025 WITH ACCURATE SOLUTIONS
c antigen is most common in blacks and whites; anti-c would be most common reactive -
CORRECT -Rh antibodies show enhanced reactivity with enzyme pretreated cells. The
M and Fya antigens are cleaved from enzyme pretreated cells and therefore there would be no
reaction between enzyme pretreated cells and serum containing anti-M or anti-Fya. The
incidence of the c antigen is 80% in whites and 96% in blacks. The incidence of the E antigen is
29% in whites and 22% in blacks. Increased reactivity with enzyme pretreated cells and
incompatible results with 8 of 10 donor units is most likely due to anti-c.
Procainamide - CORRECT -NAPA
loose clusters of small spherical microconidia, positive urease - CORRECT -
Trichophyton mentagrophytes
BHCG tumor marker - CORRECT -chorocarcinoma
5HIAA - CORRECT -carcinoid tumors
Proteus vulgaris vs P. mirabilis indole test - CORRECT -P. vulgaris is indole pos. P.
mirabilis is indole neg
Hydatid cyst fluid - CORRECT -used to neutralize Anti-P1 antibody
Antacid overdose - CORRECT -Check pH
Prolonged PT, PTT, and thrombin after collecting from catheter - CORRECT -heparin
contamination
,mixing study that was performed with a prolonged PTT that couldn't be corrected -
CORRECT -DRVVT (Dilute Russell Viper Venom Test)
two pt's ran in duplicate (PT and PTT). The PTT seemed to always be prolonged but PT looked ok
- CORRECT -check the CaCl/phospholipid reagent delivery
Patient is on coumadin therapy, what will be affected - CORRECT -Decreased protein
C
Lot's of stomatocytes - CORRECT -Liver disease
Burr cells - CORRECT -Uremia
Picture of target cells with hemoglobin C crystals. The white count was high on instrument 1, so
a second instrument was used with a stronger lysing agent, and the white count was corrected -
CORRECT -anti-lysing target cells are what increased the white count? Erythrocytes
containing hemoglobin C do not lyse normally (sickle cell diseases)
A sodium citrate tube was drawn for a HCT on a pt but the hematocrit was abnormal -
CORRECT -recollect with decreased anticoagulant. high hct (>55%) causes low
plasma so you need less anticoagulant
Question that gives a red blood cells count, HGB, and HCT. I did the rule of 3 and found that the
HGB didn't meet the rule of 3 because it was too high - CORRECT -check for lipemia
(elevates HGB)
PBS with an elevated reticulocyte count and howell jolly bodies in the RBC's -
CORRECT -Prussian blue for howell jolly bodies made of iron. Prussian blue stain,
which is not taken up by reticulocytes, is helpful in differentiating the two.
, what is composed of DNA? - CORRECT -howell jolly bodies
what falsely increases ESR - CORRECT -vibration, tilting of tube, higher temps, >1 hr
test time, improper mixing of blood, improper dilution
factors decreasing ESR - CORRECT -Polycythemia, Microcytosis (Hb C), Sickle cells,
spherocytes, Anti-inflammatory medications, Hypogammaglobulinemia, Hypofibrinogenemia
(DIC), High WBC count, Hyperviscosity
Factors increasing ESR - CORRECT -Anemia, Macrocytosis, Female gender, Age >50
years, Obesity, Pregnancy, Hypercholesterolemia, cancer, multiple myeloma, rouleaux,
infections, inflammation
what falsely decreases ESR - CORRECT -low blood/ room temps, air bubbles, tests <1
hr, improper mixing of blood, improper dilution
lactic acid collection - CORRECT -separate from serum and put on ice
coefficient of variation - CORRECT -(standard deviation/ mean) X 100
Carbon dioxide electrode measures what - CORRECT -Used to measure free carbon
dioxide ions by detecting pH. The change in pH is measured by an internal pH sensor, which is
proportional to the carbon dioxide level.
patient that had a random glucose >200 and an FPG >126. What do you do next? -
CORRECT -diagnosis with diabetes mellitus.
c antigen is most common in blacks and whites; anti-c would be most common reactive -
CORRECT -Rh antibodies show enhanced reactivity with enzyme pretreated cells. The
M and Fya antigens are cleaved from enzyme pretreated cells and therefore there would be no
reaction between enzyme pretreated cells and serum containing anti-M or anti-Fya. The
incidence of the c antigen is 80% in whites and 96% in blacks. The incidence of the E antigen is
29% in whites and 22% in blacks. Increased reactivity with enzyme pretreated cells and
incompatible results with 8 of 10 donor units is most likely due to anti-c.
Procainamide - CORRECT -NAPA
loose clusters of small spherical microconidia, positive urease - CORRECT -
Trichophyton mentagrophytes
BHCG tumor marker - CORRECT -chorocarcinoma
5HIAA - CORRECT -carcinoid tumors
Proteus vulgaris vs P. mirabilis indole test - CORRECT -P. vulgaris is indole pos. P.
mirabilis is indole neg
Hydatid cyst fluid - CORRECT -used to neutralize Anti-P1 antibody
Antacid overdose - CORRECT -Check pH
Prolonged PT, PTT, and thrombin after collecting from catheter - CORRECT -heparin
contamination
,mixing study that was performed with a prolonged PTT that couldn't be corrected -
CORRECT -DRVVT (Dilute Russell Viper Venom Test)
two pt's ran in duplicate (PT and PTT). The PTT seemed to always be prolonged but PT looked ok
- CORRECT -check the CaCl/phospholipid reagent delivery
Patient is on coumadin therapy, what will be affected - CORRECT -Decreased protein
C
Lot's of stomatocytes - CORRECT -Liver disease
Burr cells - CORRECT -Uremia
Picture of target cells with hemoglobin C crystals. The white count was high on instrument 1, so
a second instrument was used with a stronger lysing agent, and the white count was corrected -
CORRECT -anti-lysing target cells are what increased the white count? Erythrocytes
containing hemoglobin C do not lyse normally (sickle cell diseases)
A sodium citrate tube was drawn for a HCT on a pt but the hematocrit was abnormal -
CORRECT -recollect with decreased anticoagulant. high hct (>55%) causes low
plasma so you need less anticoagulant
Question that gives a red blood cells count, HGB, and HCT. I did the rule of 3 and found that the
HGB didn't meet the rule of 3 because it was too high - CORRECT -check for lipemia
(elevates HGB)
PBS with an elevated reticulocyte count and howell jolly bodies in the RBC's -
CORRECT -Prussian blue for howell jolly bodies made of iron. Prussian blue stain,
which is not taken up by reticulocytes, is helpful in differentiating the two.
, what is composed of DNA? - CORRECT -howell jolly bodies
what falsely increases ESR - CORRECT -vibration, tilting of tube, higher temps, >1 hr
test time, improper mixing of blood, improper dilution
factors decreasing ESR - CORRECT -Polycythemia, Microcytosis (Hb C), Sickle cells,
spherocytes, Anti-inflammatory medications, Hypogammaglobulinemia, Hypofibrinogenemia
(DIC), High WBC count, Hyperviscosity
Factors increasing ESR - CORRECT -Anemia, Macrocytosis, Female gender, Age >50
years, Obesity, Pregnancy, Hypercholesterolemia, cancer, multiple myeloma, rouleaux,
infections, inflammation
what falsely decreases ESR - CORRECT -low blood/ room temps, air bubbles, tests <1
hr, improper mixing of blood, improper dilution
lactic acid collection - CORRECT -separate from serum and put on ice
coefficient of variation - CORRECT -(standard deviation/ mean) X 100
Carbon dioxide electrode measures what - CORRECT -Used to measure free carbon
dioxide ions by detecting pH. The change in pH is measured by an internal pH sensor, which is
proportional to the carbon dioxide level.
patient that had a random glucose >200 and an FPG >126. What do you do next? -
CORRECT -diagnosis with diabetes mellitus.
