Hematology 2 Lecture Exam on Coagulation Tests

In the Stypven Time, the venom is obtained from the snake Bothrops atrox

• TRUE

• FALSE

Answer explanation

Bothrops atrox Vipera Ruselli

The coagulation protein most widely studied using immunologic methods:

• Factor VIII:vWF

• Factor VIIIR:Ag

• Factor VIIIR:RCo

• none of these

Answer explanation

Factor 8 - Related Antigen

The following is/are TRUE regarding the specimen for PT/APTT testing, EXCEPT:

• The blood: anticoagulant ratio is 9 parts blood to 1 part anticoagulant

• The anticoagulant volume should be adjusted for those with hematocrit less than 0.20 L/L

• The anticoagulant volume should be adjusted for those with hematocrit greater than 0.45 L/L

• none of these

Answer explanation

The anticoagulant volume should be adjusted for those with hematocrit greater than 0.45 L/L

0.55

In Modified Thrombin Clotting Time assay for Fibrinogen, if a patient is receiving fibrinolytic therapy, the following should be added to the collection tube to prevent in-vitro clot lysis:

• Monochloroacetic acid

• Epsilon Aminocaproic acid

• Ellegic acid

• None of these

Answer explanation

Soybean Trypsin Inhibition

Clotting Time is prolonged by heparin:

• Reptilase Time

• Thrombin Time

• Both of these

• Neither of these

Answer explanation

Reptilase Time (Normal)

Thrombin Time (Prolonged)

The following are vitamin K dependent coagulation factors EXCEPT:

• Factor II

• Factor VII

• Factor I

• Factor IX

When BaSO4 is added to normal plasma, what factors will be adsorbed?

1. Factor II

2. Factor V

3. Factor VIII

4. Factor IX

5. Factor X

• 1, 2, 3

• 1, 3, 4

• 2 & 3

• 1, 4, 5

• 3, 4, 5

Answer explanation

Weird enough, alam kong Barium Sulfate ang BaSO4. I don't even know kung san ko napulot yon. Probably chem hahaha

In the APTT, maximum activation of the contact factors is accomplished by the addition of:

• kaolin

• ellagic acid

• micronized silica

• all of these

• none of these

Coagulation will be hastened by the following, EXCEPT:

• Air bubbles in the blood

• Temperature above 45 degrees Centigrade

• Excessive agitation of the blood

• none of these

Answer explanation

Coagulation will be hastened.

The answer is Retard

The value is taken from the highest dilution that causes macroscopic agglutination

• Enzyme Immunoassay of D-dimer

• Latex Bead D-D assay

• Both of these

• Neither of these

Answer explanation

highest dilution that causes macroscopic -- Titer