1|Page
MLS ASCP EXAM RECALL
QUESTIONS WITH PERFECT
SOLUTIONS 2026
Patient with autoimmune condition presents infection with S. pyogenes, S. aureus
and (__) what is the possible deficiency? - correct-answer -Neutrophils
Sample taken from indwelling catheter. Patient isn't on any anticoagulants yet
PTT and TT are way elevated - correct-answer -Heparin contamination (from
catheter)
In the second phase of platelet aggregation what is irreversible? - correct-answer
-Fibrin formation
,2|Page
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
,3|Page
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
, 4|Page
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
MLS ASCP EXAM RECALL
QUESTIONS WITH PERFECT
SOLUTIONS 2026
Patient with autoimmune condition presents infection with S. pyogenes, S. aureus
and (__) what is the possible deficiency? - correct-answer -Neutrophils
Sample taken from indwelling catheter. Patient isn't on any anticoagulants yet
PTT and TT are way elevated - correct-answer -Heparin contamination (from
catheter)
In the second phase of platelet aggregation what is irreversible? - correct-answer
-Fibrin formation
,2|Page
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
,3|Page
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
, 4|Page
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
