VTHT 2223 - Exam Questions A+ Graded
Which type of coagulation analyzer uses wires that gently move back and forth through
the sample cup to detect the clot formation? - ANSWER Fibrometer
Which of the following is the correct term for the mathematical average of the size of the
individual platelets counted by an analyzer? - ANSWER Mean platelet volume
The activation of which of the following results in the generation of large quantities of
thrombin? - ANSWER Factor X
Which of the following is produced when plasmin and tissue plasminogen activator act
on insoluble fibrin? - ANSWER Fibrin degradation products and D-dimers
Which term describes a decrease in the amount of platelets circulating in peripheral
blood? - ANSWER Thrombocytopenia
Which is a coagulation test that evaluates the extrinsic coagulation pathway? - ANSWER
Prothrombin time test
Which is the correct dilution in sodium citrate for an accurate coagulation test? -
ANSWER 10%
Which red blood cell abnormality is often seen in patients with disseminated
intravascular coagulation? - ANSWER Schistocytes
Which term refers membrane-bound cytoplasmic fragments released from platelets that
increase the surface area to aid in coagulation? - ANSWER Microparticles
Which term refers to the body's ability to maintain the integrity of the blood and the
blood vessels? - ANSWER Hemostasis
Which is another name for hemophilia B? - ANSWER Christmas disease
Which type of coagulation analyzer can use either whole blood or citrated samples and
the results are usually provided graphically, including the clotting time, strength of the
time and length of time to break down the clot? - ANSWER Thromboelastograph
Which coagulation test is designed to help differentiate rodenticide toxicity from
hemophilia? - ANSWER PIVKA
Why do most automated hematology analyzers have a high rate of inaccuracy in platelet
counts? - ANSWER Platelet clumping and overlapping with RBCs
The complicated coagulation cascade involved in blood clotting is also referred to as
which of the following? - ANSWER Chemical hemostasis
, Which deficiency results from ingestion of some types of rodenticides? - ANSWER
Vitamin K
Which type of automated coagulation analyzer uses cartridges that contain reagents for
the tests and LED optical detectors to evaluate prothrombin time (PT) and activated
thromboplastin time (aPTT)? - ANSWER Coag Dx analyzer
Which of the following abnormalities will give a prolonged activated clotting time? -
ANSWER Thrombocytopenia
What should the technician advise an owner whose dog is on long-term
anti-inflammatories for osteoarthritis? - ANSWER Regular blood work is needed to
ensure the health of the patient's liver
Which of the following coagulation tests uses a citrated sample in a tube to which
thromboplastin reagent is added followed by a reagent designed to recalcify the
sample, forming a clot within 6 to 20 seconds? - ANSWER Prothrombin time test
Which vacutainer tube should be collected first when multiple sample types are needed
from the same patient? - ANSWER Blue top
Which of the indices assesses the variation in the size of the platelets? - ANSWER
Platelet distribution width
Which term best describes a process that requires platelets, a number of coagulation
factors and complex reaction pathways? - ANSWER Hemostasis
The aggregation and adhesion of platelets to an exposed blood vessel refers to which of
the following? - ANSWER Mechanical hemostasis
Which condition is characterized by microvascular thrombi that consume platelets and
the coagulation factors and lead to systemic hemorrhage? - ANSWER Disseminated
intravascular coagulation
Which type of coagulation analyzer uses disposable cartridges with a collagen-coated
membrane and measures the adhesion and aggregation of the platelets? - ANSWER
Platelet function analyzer
Which of the following medications may destroy or inhibit the platelets in peripheral
blood so significantly that improvements in clinical signs will not be evident until
undamaged platelets are released from the bone marrow? - ANSWER Acetaminophen
Which of the following results from fibrinolysis of the microthrombi in disseminated
intravascular coagulation? - ANSWER Excess D-dimers
Which term is the name for newly released platelets that contain high levels of RNA? -
ANSWER Reticulated platelets
Which best describes the procedure for performing a platelet estimate? - ANSWER
Which type of coagulation analyzer uses wires that gently move back and forth through
the sample cup to detect the clot formation? - ANSWER Fibrometer
Which of the following is the correct term for the mathematical average of the size of the
individual platelets counted by an analyzer? - ANSWER Mean platelet volume
The activation of which of the following results in the generation of large quantities of
thrombin? - ANSWER Factor X
Which of the following is produced when plasmin and tissue plasminogen activator act
on insoluble fibrin? - ANSWER Fibrin degradation products and D-dimers
Which term describes a decrease in the amount of platelets circulating in peripheral
blood? - ANSWER Thrombocytopenia
Which is a coagulation test that evaluates the extrinsic coagulation pathway? - ANSWER
Prothrombin time test
Which is the correct dilution in sodium citrate for an accurate coagulation test? -
ANSWER 10%
Which red blood cell abnormality is often seen in patients with disseminated
intravascular coagulation? - ANSWER Schistocytes
Which term refers membrane-bound cytoplasmic fragments released from platelets that
increase the surface area to aid in coagulation? - ANSWER Microparticles
Which term refers to the body's ability to maintain the integrity of the blood and the
blood vessels? - ANSWER Hemostasis
Which is another name for hemophilia B? - ANSWER Christmas disease
Which type of coagulation analyzer can use either whole blood or citrated samples and
the results are usually provided graphically, including the clotting time, strength of the
time and length of time to break down the clot? - ANSWER Thromboelastograph
Which coagulation test is designed to help differentiate rodenticide toxicity from
hemophilia? - ANSWER PIVKA
Why do most automated hematology analyzers have a high rate of inaccuracy in platelet
counts? - ANSWER Platelet clumping and overlapping with RBCs
The complicated coagulation cascade involved in blood clotting is also referred to as
which of the following? - ANSWER Chemical hemostasis
, Which deficiency results from ingestion of some types of rodenticides? - ANSWER
Vitamin K
Which type of automated coagulation analyzer uses cartridges that contain reagents for
the tests and LED optical detectors to evaluate prothrombin time (PT) and activated
thromboplastin time (aPTT)? - ANSWER Coag Dx analyzer
Which of the following abnormalities will give a prolonged activated clotting time? -
ANSWER Thrombocytopenia
What should the technician advise an owner whose dog is on long-term
anti-inflammatories for osteoarthritis? - ANSWER Regular blood work is needed to
ensure the health of the patient's liver
Which of the following coagulation tests uses a citrated sample in a tube to which
thromboplastin reagent is added followed by a reagent designed to recalcify the
sample, forming a clot within 6 to 20 seconds? - ANSWER Prothrombin time test
Which vacutainer tube should be collected first when multiple sample types are needed
from the same patient? - ANSWER Blue top
Which of the indices assesses the variation in the size of the platelets? - ANSWER
Platelet distribution width
Which term best describes a process that requires platelets, a number of coagulation
factors and complex reaction pathways? - ANSWER Hemostasis
The aggregation and adhesion of platelets to an exposed blood vessel refers to which of
the following? - ANSWER Mechanical hemostasis
Which condition is characterized by microvascular thrombi that consume platelets and
the coagulation factors and lead to systemic hemorrhage? - ANSWER Disseminated
intravascular coagulation
Which type of coagulation analyzer uses disposable cartridges with a collagen-coated
membrane and measures the adhesion and aggregation of the platelets? - ANSWER
Platelet function analyzer
Which of the following medications may destroy or inhibit the platelets in peripheral
blood so significantly that improvements in clinical signs will not be evident until
undamaged platelets are released from the bone marrow? - ANSWER Acetaminophen
Which of the following results from fibrinolysis of the microthrombi in disseminated
intravascular coagulation? - ANSWER Excess D-dimers
Which term is the name for newly released platelets that contain high levels of RNA? -
ANSWER Reticulated platelets
Which best describes the procedure for performing a platelet estimate? - ANSWER
