When platelets are activated, they express ______on their surface.
A. Thrombin
B. von Willebrand factor
C. Phosphateidylserine
D. Microparticles
What is C Phosphateidylserine
100
Which anticoagulant is preferred for platelet testing?
A. Heparin
B. Sodium citrate
C. EDTA
D. Ammonium oxalate
What is C EDTA
100
The average size of the individual platelets is recorded as the
A. Plateletcrit
B. Mean platelet volume
C. Platelet - large range cell ratio
D. Platelet distribution width
What is B Mean platelet volume
100
A coagulation test that uses a tube containing diatomaceous earth is the:
A. PT
B. Bleeding time
C. APTT
D. ACT
What is D ACT
100
Which coagulation assay is a good screening test for rodenticide ingestion?
A. Activated partial thromboplastin time
B. Prothrombin time
C. von Willebrand antigen assay
D. Platelet count
What is B Prothrombin time
200
Tissue factor binds to ______ in plasma to initiate the coagulation reaction.
A. Factor VIII
B. Thrombin
C. von Willebrand factor
D. Prothrombin
What is A Factor VIII
200
The preferred anticoagulant for most plasma assays of coagulation is:
A. Heparin
B. Sodium citrate
C. EDTA
D. Ammonium oxalate
What is B Sodium citrate
200
_____ is a measure of the percentage of the blood volume that is comprised of platelets.
A. Plateletcrit
B. Mean platelet volume
C. Platelet - large cell ratio
D. Platelet distribution width
What is A Plateletcrit
200
A coagulation test that evaluates the extrinsic coagulation pathway is the:
A. PT
B. Bleeding time
C. APTT
D. ACT
What is A PT
200
The most common inherited disorder of domestic animals is:
A. Thrombocytopenia
B. Hemophilia
C. Anticoagulant rodenticide toxicity
D. von Wiillebrand disease
What is D von Willebrand disease
300
_____ serves to stabilize the platelet plug.
A. Factor VIII
B. Thrombin
C. von Willebrand factor
D. Prothrombin
What is C von Willebrand factor
300
The proper ratio of blood to citrate anticoagulant is
A. 1:5
B. 1:9
C. 1:10
D. 1:20
What is B 1:9
300
Variability in the size of platelets is evaluated with the _____
A. Plateletcrit
B. Mean platelet volume
C. Platelet-large cell ratio
D. Platelet distribution width
What is D Platelet distribution width
300
D-Dimer and FDP tests can be used to evaluate:
A. Primary (mechanical) hemostasis
B. Secondary (chemical) hemostasis
C. Tertiary hemostasis
D. Anticoagulant rodenticide toxicity
What is C Tertiary hemostasis
300
The correct term for the presence of pinpoint hemorrhage is:
A. Ecchymoses
B. Petechia
C. Purpura
D. Epistaxis
What is B Petechia
400
The formation of coagulation complexes results in the activation of:
A. Factor II
B. Factor VIII
C. Factor IX
D. Factor X
What is D Factor X
400
The Coag Dx analyzer uses ______ technology to evaluate coagulation
A. LED detector
B. Mechanical
C. Wire movement
D. Collagen-coated membrane
What is A LED detector
400
A measure of the percentage of platelets that are larger than normal is the
A. Plateletcrit
B. Mean platelet volume
C. Platelet-large cell ratio
D. Platelet distribution width
What is C Platelet-large cell ratio
400
The PIVKA test can be used to evaluate:
A. Primary (mechanical) hemostasis
B. Secondary (chemical) hemostasis
C. Tertiary hemostasis
D. Anticoagulant rodenticide toxicity
What is D Anticoagulant rodenticide toxicity
400
Patients with DIC often have evidence of _____ on the differential blood cell film.
A. Schistocytes
B. FDPs
C. Polycythemia
D. Myeloproliferation
What is A Schistocytes
500
The breakdown of the clot involves interaction with:
A. Thrombin
B. Tissue factor
C. Tissue plasminogen activator
D. D-Dimers
What is C Tissue plasminogen activator
500
The PFA-100 analyzer uses _____ technology to evaluate coagulation.
A. LED detector
B. Mechanical
C. Wire movement
D. Collagen-coated membrane
What is D Collagen-coated membrane
500
Newly released platelets that contain high levels of RNA are referred to as
A. Platelet bands
B. Granulated platelets
C. RNA-rich platelets
D. Reticulated platelets
What is D Reticulated platelets
500
A primary assay for the evaluation of platelet number and function is the _____.
A. Platelet estimate
B. Buccal mucosa bleeding time
D. Clot retraction
What is B Buccal mucosa bleeding time
500
Hemophilia A is due to deficient or defective production of:
A. Factor VII
B. Christmas factor
C. Factor VIII
D. Prothrombin