MLS ASCP EXAM RECALL
2026/2027 ACTUAL QUESTIONS
WITH VERIFIED ANSWERS.
In the second phase of platelet aggregation what is
irreversible? - correct answer-Fibrin formation
Lupus anticoagulant causes - correct answer-thrombocytosis
Controls and patient PTT elevated, control and patient PT
elevated - correct answer-thromboplastin was added by error
Anti-A Anti-B A B
0 2mf+ 4+ 0 - correct answer-Discrepancy due to Bx-subgroup
Whole blood donation stops at 390ml - correct answer-PRBC
(low volume unit)
,Patient A+, Le (a+b-) - correct answer-has Le(a)
Antibody that deteriorates in storage - correct answer-P1
Choose positive controls to test for anti-c and negative control
to test anti-Fy(a) - correct answer-C+c+ for the positive control
and Fy(a) for the negative control
Pregnant woman O-, anti-D, anti-C, anti-I, previously she had
anti-Le(a), baby is A+ with DAT (+), anti-D and anti-C are
identified, which blood would you give? - correct answer-O-
without C
Le(a) Le(b) IS 37 AHG
0 + 1+ 0 0
0 + 1+ 0 0
+ 0 0 +/-2w +/-2w
+ 0 0 +/-2w +/-2w - correct answer-Glycolipid (Le(a)) absorbed
from plasma
, Detection of ab where 11 tubes resulted negative in AHG, but
when added CC 4 of them didn't agglutinate - correct answer-
Machine didn't dispense correctly the saline in the wash
Baby A+, DAT-, Mother O- before birth - correct answer-Rosette
test
Which donor should you defer ? - correct answer-donor
received Hep B immunoglobulin 8 weeks ago
Patient with Hct 62%, the sodium citrate tube was centrifuged
and noticed that the blood plasma ratio was low. - correct
answer-take sample with less anticoagulant?(that would be for
coag studies)
Instrument linearity something about comparing mean - correct
answer-Paired T-test
Calibration of blood gases analyzer - correct answer-2 buffers
with known pH and constant temperature
2026/2027 ACTUAL QUESTIONS
WITH VERIFIED ANSWERS.
In the second phase of platelet aggregation what is
irreversible? - correct answer-Fibrin formation
Lupus anticoagulant causes - correct answer-thrombocytosis
Controls and patient PTT elevated, control and patient PT
elevated - correct answer-thromboplastin was added by error
Anti-A Anti-B A B
0 2mf+ 4+ 0 - correct answer-Discrepancy due to Bx-subgroup
Whole blood donation stops at 390ml - correct answer-PRBC
(low volume unit)
,Patient A+, Le (a+b-) - correct answer-has Le(a)
Antibody that deteriorates in storage - correct answer-P1
Choose positive controls to test for anti-c and negative control
to test anti-Fy(a) - correct answer-C+c+ for the positive control
and Fy(a) for the negative control
Pregnant woman O-, anti-D, anti-C, anti-I, previously she had
anti-Le(a), baby is A+ with DAT (+), anti-D and anti-C are
identified, which blood would you give? - correct answer-O-
without C
Le(a) Le(b) IS 37 AHG
0 + 1+ 0 0
0 + 1+ 0 0
+ 0 0 +/-2w +/-2w
+ 0 0 +/-2w +/-2w - correct answer-Glycolipid (Le(a)) absorbed
from plasma
, Detection of ab where 11 tubes resulted negative in AHG, but
when added CC 4 of them didn't agglutinate - correct answer-
Machine didn't dispense correctly the saline in the wash
Baby A+, DAT-, Mother O- before birth - correct answer-Rosette
test
Which donor should you defer ? - correct answer-donor
received Hep B immunoglobulin 8 weeks ago
Patient with Hct 62%, the sodium citrate tube was centrifuged
and noticed that the blood plasma ratio was low. - correct
answer-take sample with less anticoagulant?(that would be for
coag studies)
Instrument linearity something about comparing mean - correct
answer-Paired T-test
Calibration of blood gases analyzer - correct answer-2 buffers
with known pH and constant temperature
