VTHT 2223 Path 1 Unit 3 Exam
Latest Update
Which of the following could result if a tourniquet is in place over a blood vessel for too
long prior to collecting a blood sample? - ANSWER The platelet count may be elevated in
the blood sample.
The aggregation and adhesion of platelets to an exposed blood vessel refers to which of
the following? - ANSWER Mechanical hemostasis
Which is a coagulation test that evaluates the extrinsic coagulation pathway? - ANSWER
Prothrombin time test
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 is true for primary coagulation disorders? - ANSWER Rare and
usually a result of an inherited defect
Which term describes a decrease in the amount of platelets circulating in peripheral
blood? - ANSWER Thrombocytopenia
What type of sample is used when evaluating platelet counts with an automated
hematology analyzer? - ANSWER An EDTA-treated blood sample
Which disorder is the most common inherited coagulation factor deficiency in dogs and
is caused by Factor VIII deficiency? - ANSWER Hemophilia
Which of the following is the best speed and time for the centrifuge when harvesting
plasma from a blood sample? - ANSWER 2500 g for 15 minutes
Which term best describes a process that requires platelets, a number of coagulation
factors, and complex reaction pathways? - ANSWER Hemostasis
Which type of von Willebrand disease is likely to be diagnosed in German Shorthaired
Pointers? - ANSWER Type 2
Which is the most common inherited coagulation disorder in domestic animals? -
ANSWER von Willebrand disease
Why do most automated hematology analyzers have a high rate of inaccuracy in platelet
counts? - ANSWER Platelet clumping and overlapping with RBCs
, 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 type of von Willebrand disease is likely to be diagnosed in Shetland Sheepdogs? -
ANSWER Type 3
Which Vacutainer tube should be collected first when multiple sample types are needed
from the same patient? - ANSWER Blue-top
Which of the following terms is the measure of the percentage of the total blood volume
that is composed of platelets? - ANSWER Thrombocrit
Which is generally the first coagulation test run if vitamin K deficiency is suspected? -
ANSWER Prothrombin time
A small amount of which substance is generated in the first phase of coagulation that
recruits and activates platelets and inhibits fibrinolysis? - ANSWER Thrombin
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 is likely to occur when collecting a blood sample from a very
excited patient that is struggling during restraint for blood collection? - ANSWER The
platelet count may be elevated in the blood sample.
Which deficiency results from ingestion of some types of rodenticides? - ANSWER
Vitamin K
What would be the correct amount of sodium citrate to add to a 2 mL blood sample for a
patient with a hematocrit of 20%? - ANSWER 0.3 mL
Which type of von Willebrand disease is an autosomal dominant inheritance pattern
characterized by very low levels of vWF? - ANSWER Type 3 vWF
Which test is used to evaluate tertiary hemostasis? - ANSWER D-dimer test
Which manual blood coagulation test requires the use of a Vacutainer tube that contains
an additive such as diatomaceous earth or kaolin? - ANSWER Activated clotting time
Which is a clinical sign of a bleeding disorder that is often confused with bruising? -
ANSWER Ecchymotic hemorrhages
Which of the following is true regarding acquired coagulation disorders? - ANSWER Are
only caused by nutritional deficiencies.
Which type of coagulation analyzer uses wires that gently move back and forth through
the sample cup to detect the clot formation? - ANSWER Fibrometer
Latest Update
Which of the following could result if a tourniquet is in place over a blood vessel for too
long prior to collecting a blood sample? - ANSWER The platelet count may be elevated in
the blood sample.
The aggregation and adhesion of platelets to an exposed blood vessel refers to which of
the following? - ANSWER Mechanical hemostasis
Which is a coagulation test that evaluates the extrinsic coagulation pathway? - ANSWER
Prothrombin time test
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 is true for primary coagulation disorders? - ANSWER Rare and
usually a result of an inherited defect
Which term describes a decrease in the amount of platelets circulating in peripheral
blood? - ANSWER Thrombocytopenia
What type of sample is used when evaluating platelet counts with an automated
hematology analyzer? - ANSWER An EDTA-treated blood sample
Which disorder is the most common inherited coagulation factor deficiency in dogs and
is caused by Factor VIII deficiency? - ANSWER Hemophilia
Which of the following is the best speed and time for the centrifuge when harvesting
plasma from a blood sample? - ANSWER 2500 g for 15 minutes
Which term best describes a process that requires platelets, a number of coagulation
factors, and complex reaction pathways? - ANSWER Hemostasis
Which type of von Willebrand disease is likely to be diagnosed in German Shorthaired
Pointers? - ANSWER Type 2
Which is the most common inherited coagulation disorder in domestic animals? -
ANSWER von Willebrand disease
Why do most automated hematology analyzers have a high rate of inaccuracy in platelet
counts? - ANSWER Platelet clumping and overlapping with RBCs
, 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 type of von Willebrand disease is likely to be diagnosed in Shetland Sheepdogs? -
ANSWER Type 3
Which Vacutainer tube should be collected first when multiple sample types are needed
from the same patient? - ANSWER Blue-top
Which of the following terms is the measure of the percentage of the total blood volume
that is composed of platelets? - ANSWER Thrombocrit
Which is generally the first coagulation test run if vitamin K deficiency is suspected? -
ANSWER Prothrombin time
A small amount of which substance is generated in the first phase of coagulation that
recruits and activates platelets and inhibits fibrinolysis? - ANSWER Thrombin
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 is likely to occur when collecting a blood sample from a very
excited patient that is struggling during restraint for blood collection? - ANSWER The
platelet count may be elevated in the blood sample.
Which deficiency results from ingestion of some types of rodenticides? - ANSWER
Vitamin K
What would be the correct amount of sodium citrate to add to a 2 mL blood sample for a
patient with a hematocrit of 20%? - ANSWER 0.3 mL
Which type of von Willebrand disease is an autosomal dominant inheritance pattern
characterized by very low levels of vWF? - ANSWER Type 3 vWF
Which test is used to evaluate tertiary hemostasis? - ANSWER D-dimer test
Which manual blood coagulation test requires the use of a Vacutainer tube that contains
an additive such as diatomaceous earth or kaolin? - ANSWER Activated clotting time
Which is a clinical sign of a bleeding disorder that is often confused with bruising? -
ANSWER Ecchymotic hemorrhages
Which of the following is true regarding acquired coagulation disorders? - ANSWER Are
only caused by nutritional deficiencies.
Which type of coagulation analyzer uses wires that gently move back and forth through
the sample cup to detect the clot formation? - ANSWER Fibrometer
