Question 1

Which of the following specimens would be acceptable for platelet aggregation studies?

Accepted Answer

A)  Blood drawn in ethylenediaminetetraacetic acid (EDT
A)  and kept at room temperature for 6 hours 
B)  Blood drawn in 3.2% sodium citrate and transported to the laboratory on ice (2 $\degree$to 4 $\degree$
C)  
C)  Blood drawn in a serum separator tube 
D)  Blood drawn in 3.2% sodium citrate and kept at room temperature for 2 hours after drawing 
A)  Blood drawn in ethylenediaminetetraacetic acid (EDT
A)  and kept at room temperature for 6 hours 
B)  Blood drawn in 3.2% sodium citrate and transported to the laboratory on ice (2 $\degree$to 4 $\degree$
C)  
C)  Blood drawn in a serum separator tube 
D)  Blood drawn in 3.2% sodium citrate and kept at room temperature for 2 hours after drawing

Question 2

A patient has an elevated thrombin time and normal reptilase time. Which of the following situations is most likely?

Accepted Answer

A)  Heparin therapy 
B)  Low fibrinogen 
C)  Elevated fibrin split products 
D)  Dysfibrinogenemia 
A)  Heparin therapy 
B)  Low fibrinogen 
C)  Elevated fibrin split products 
D)  Dysfibrinogenemia

Question 3

Which of the following is an acceptable sample for testing on a photo-optical clot-detecting instrument?

Accepted Answer

A)  Lipemic plasma 
B)  Hemolyzed plasma 
C)  Serum 
D)  Plasma collected using a 9:1 ratio of whole blood to 3.2% sodium citrate 
A)  Lipemic plasma 
B)  Hemolyzed plasma 
C)  Serum 
D)  Plasma collected using a 9:1 ratio of whole blood to 3.2% sodium citrate

Question 4

An elevated tissue plasminogen activator (TPA) is associated with:

Accepted Answer

A)  Abnormal bleeding 
B)  Aspirin use 
C)  DIC 
D)  Decreased fibrinolysis 
A)  Abnormal bleeding 
B)  Aspirin use 
C)  DIC 
D)  Decreased fibrinolysis

Question 5

The bleeding time result will be normal and thus of no value to perform in patients who have:

Accepted Answer

A)  A qualitative platelet disorder 
B)  von Willebrand disease (VW
D)  
C)  Glanzmann thrombasthenia 
D)  Factor VIII deficiency 
A)  A qualitative platelet disorder 
B)  von Willebrand disease (VW
D)  
C)  Glanzmann thrombasthenia 
D)  Factor VIII deficiency

Question 6

What is the test commonly used to monitor the high heparin doses used in cardiac bypass surgery?

Accepted Answer

A)  PTT 
B)  Prothrombin time 
C)  Thrombin clotting time 
D)  Fibrinogen 
A)  PTT 
B)  Prothrombin time 
C)  Thrombin clotting time 
D)  Fibrinogen

Question 7

A patient has a factor VIII level of 50% activity. Which is most likely true regarding what can be expected for this patient's clinical situation?

Accepted Answer

A)  Severe bleeding 
B)  Moderate bleeding 
C)  Mild bleeding 
D)  Normal with respect to factor VIII 
A)  Severe bleeding 
B)  Moderate bleeding 
C)  Mild bleeding 
D)  Normal with respect to factor VIII

Question 8

Which of the following is good practice in regard to phlebotomy on patients with hemostasis testing ordered?

Accepted Answer

A)  Make sure the patient is fasting. 
B)  Always draw the sodium citrate tube last. 
C)  Collect the blood in a glass syringe. 
D)  Use a 20- or 21-gauge needle. 
A)  Make sure the patient is fasting. 
B)  Always draw the sodium citrate tube last. 
C)  Collect the blood in a glass syringe. 
D)  Use a 20- or 21-gauge needle.

Question 9

Which of the following deficiencies prolongs the PTT but does not lead to abnormal bleeding?

Accepted Answer

A)  Factor V 
B)  Factor VIII 
C)  Factor XI 
D)  Factor XII 
A)  Factor V 
B)  Factor VIII 
C)  Factor XI 
D)  Factor XII

Question 10

Which of the following would likely have a normal PT?

Accepted Answer

A)  Patient with a factor VII deficiency 
B)  Patient with a factor VIII deficiency 
C)  Patient on warfarin 
D)  Clotted blood 
A)  Patient with a factor VII deficiency 
B)  Patient with a factor VIII deficiency 
C)  Patient on warfarin 
D)  Clotted blood

Exam 45: Laboratory Evaluation of Hemostasis

Which of the following specimens would be acceptable for platelet aggregation studies?

A patient has an elevated thrombin time and normal reptilase time. Which of the following situations is most likely?

Which of the following is an acceptable sample for testing on a photo-optical clot-detecting instrument?

An elevated tissue plasminogen activator (TPA) is associated with:

The bleeding time result will be normal and thus of no value to perform in patients who have:

What is the test commonly used to monitor the high heparin doses used in cardiac bypass surgery?

A patient has a factor VIII level of 50% activity. Which is most likely true regarding what can be expected for this patient's clinical situation?

Which of the following is good practice in regard to phlebotomy on patients with hemostasis testing ordered?

Which of the following deficiencies prolongs the PTT but does not lead to abnormal bleeding?

Which of the following would likely have a normal PT?

An Overview of Clinical Laboratory Hematology

Safety in the Hematology Laboratory

Specimen Collection

Care and Use of the Microscope

Quality Assurance in Hematology and Hemostasis Testing

Cellular Structure and Function

Hematopoiesis

Erythrocyte Production and Destruction

Energy Metabolism and Membrane Physiology of the Erythrocyte

Hemoglobin Metabolism

Iron Metabolism

Leukocyte Development, Kinetics, and Functions

Platelet Production, Structure, and Function

Routine and Point-Of-Care Testing in Hematology: Manual and Semiautomated Methods

Examination of the Peripheral Blood Film and Correlation With the Complete Blood Count

Bone Marrow Examination

Body Fluids in the Hematology Laboratory

Anemias: Red Blood Cell Morphology and Approach to Diagnosis

Disorders of Iron and Heme Metabolism

Anemias Caused by Defects of Dna Metabolism

Bone Marrow Failure

Introduction to Increased Destruction of Erythrocytes

Intrinsic Defects Leading to Increased Erythrocyte Destruction

Extrinsic Defects Leading to Increased Erythrocytedestructionnonimmune Causes

Extrinsic Defects Leading to Increased Erythrocytedestructionimmune Causes

Hemoglobinopathies Structural Defects in Hemoglobin

Thalassemias

Nonmalignant Leukocyte Disorders

Introduction to Leukocyte Neoplasms

Cytochemistry

Cytogenetics

Molecular Diagnostics in the Clinical Laboratory

Flow Cytometric Analysis in Hematologic Disorders

Myeloproliferative Neoplasms

Myelodysplastic Syndromes

Acute Leukemias

Mature Lymphoid Neoplasms

Pediatric and Geriatric Hematology

Automated Cell-Counting Instrumentation

Normal Hemostasis and Coagulation

Hemorrhagic Coagulation Disorders

Thrombosis Risk Testing

Thrombocytopenia and Thrombocytosis

Qualitative Disorders of Platelets and Vasculature

Monitoring Antithrombotic Therapies

Coagulation Instrumentation

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