MLT 1330 - COAGULATION CASCADE, PT & aPTT REVIEW
EXAM QUESTIONS WITH ACCURATE ANSWERS
What are the factors in the Intrinsic Pathway?
a) V, VII, III, X
b) XIII, II, I, XIII
c) VIII, IX, XI, XII, HK, PK
d) VIII, VII, V, III - ANSWER c) VIII, IX, XI, XII, HK, PK
What test would a physician order a test to monitor a patient on Heparin
therapy?
a) PTT (Extrinsic pathway)
b) aPTT (intrinsic pathway)
c) BT
d) TT - ANSWER b) aPTT (Intrinsic pathway)
The aPTT tests for all factors except which?
a) X
b) VIII / XI
c) XIII / VII
d) III - ANSWER c) Factors XIII - Common Pathway
Factor VII is in the Intrinsic Pathway and would test normal with aPTT test.
What is the PT (Extrinsic Pathway) Reference Range?
a) 0-10 seconds
b) 40-60 seconds
c) 5-20 seconds
d) 10-13 seconds - ANSWER d) 10-13 seconds
, Used data from PT lab from MLT 1330
What is the reagent used in the PT test?
a). prothrombin
b). fibrinogen
c). thromboplastin
d). Coumadin - ANSWER c) thromboplastin
When running controls for PT test, what is the acceptable standard
deviation (SD)?
a) +/- 4
b) +/- 1
c) +/- 2
d) +/- 0 - ANSWER c) +/- 2 SD
When running a PT on controls or a patient sample, the results must be
reported accurately with __________________ % accuracy
a) 90 %
b) 75 %
c) 100 %
d) 95 % - ANSWER d) 95% accuracy
What is the purpose of CaCl (calcium chloride) in the PT & aPTT test?
a) initiates platelet aggregation
b) to initiate vascular constriction
c) initiates the coagulation cascade resulting in the formation of a stable
fibrin clot.
d) all of the above - ANSWER c) initiates the coagulation cascade resulting
in the formation of a stable fibrin clot.
What do you reconstitute the controls for the PT & aPTT with?
a) mineral water
b) distilled water
c) salt water
EXAM QUESTIONS WITH ACCURATE ANSWERS
What are the factors in the Intrinsic Pathway?
a) V, VII, III, X
b) XIII, II, I, XIII
c) VIII, IX, XI, XII, HK, PK
d) VIII, VII, V, III - ANSWER c) VIII, IX, XI, XII, HK, PK
What test would a physician order a test to monitor a patient on Heparin
therapy?
a) PTT (Extrinsic pathway)
b) aPTT (intrinsic pathway)
c) BT
d) TT - ANSWER b) aPTT (Intrinsic pathway)
The aPTT tests for all factors except which?
a) X
b) VIII / XI
c) XIII / VII
d) III - ANSWER c) Factors XIII - Common Pathway
Factor VII is in the Intrinsic Pathway and would test normal with aPTT test.
What is the PT (Extrinsic Pathway) Reference Range?
a) 0-10 seconds
b) 40-60 seconds
c) 5-20 seconds
d) 10-13 seconds - ANSWER d) 10-13 seconds
, Used data from PT lab from MLT 1330
What is the reagent used in the PT test?
a). prothrombin
b). fibrinogen
c). thromboplastin
d). Coumadin - ANSWER c) thromboplastin
When running controls for PT test, what is the acceptable standard
deviation (SD)?
a) +/- 4
b) +/- 1
c) +/- 2
d) +/- 0 - ANSWER c) +/- 2 SD
When running a PT on controls or a patient sample, the results must be
reported accurately with __________________ % accuracy
a) 90 %
b) 75 %
c) 100 %
d) 95 % - ANSWER d) 95% accuracy
What is the purpose of CaCl (calcium chloride) in the PT & aPTT test?
a) initiates platelet aggregation
b) to initiate vascular constriction
c) initiates the coagulation cascade resulting in the formation of a stable
fibrin clot.
d) all of the above - ANSWER c) initiates the coagulation cascade resulting
in the formation of a stable fibrin clot.
What do you reconstitute the controls for the PT & aPTT with?
a) mineral water
b) distilled water
c) salt water
