ARDMS RVT EXAM QUESTIONS AND ACCURATE ANSWERS
Positive Predictive Value (PPV)-ANSWER The probability that a patient with a positive
test result really does have the disease.
=A / A + B
Negative Predictive Value (NPV)-ANSWER The probability that a patient with a negative
test result really is free if disease.
D/D+C
Sensitivity-ANSWER The ability of a test to detect disease when disease is present.
A/A+C
Specificity - ANSWER The ability of a test to correctly identify a normal result.
D/D+B
Accuracy - ANSWER The overall percentage of correct results. The degree of
"closeness" to something to its actual value.
A+D/A+B+C+D
True Positive - ANSWER The number of tests that say disease is present and the gold
standard agrees.
A
True Negative - ANSWER The number of tests that say disease is not present that the
gold standard agrees with.
D
, False Positive - ANSWER The number of tests that say disease is present but negative by
the gold standard.
B
False Negative - ANSWER The number of tests that say disease is not present but the
gold standard says it is.
C
Reliability - ANSWER The reproducibility of similar results under similar circumstances.
Accuracy over a period of time.
ABI - Ankle Brachial Index - ANSWER The ratio of the ankle systolic pressure to the
highest brachial systolic pressure.
Indicates the severity of PAOD.
ABI = > 1.30 - ANSWER Incompressible
ABI = .90 to 1.30 - ANSWER Normal
ABI = .75 to .90 - ANSWER Mild
ABI = .50 to .75 - ANSWER Moderate
ABI = < .50 - ANSWER Severe
ABI = < .35 - ANSWER Tissue threatening
Budd-Chiari syndrome - ANSWER Condition caused by occlusion of the hepatic veins
that drain the liver; either by thrombosis (primary) or compression (secondary). Rare
Positive Predictive Value (PPV)-ANSWER The probability that a patient with a positive
test result really does have the disease.
=A / A + B
Negative Predictive Value (NPV)-ANSWER The probability that a patient with a negative
test result really is free if disease.
D/D+C
Sensitivity-ANSWER The ability of a test to detect disease when disease is present.
A/A+C
Specificity - ANSWER The ability of a test to correctly identify a normal result.
D/D+B
Accuracy - ANSWER The overall percentage of correct results. The degree of
"closeness" to something to its actual value.
A+D/A+B+C+D
True Positive - ANSWER The number of tests that say disease is present and the gold
standard agrees.
A
True Negative - ANSWER The number of tests that say disease is not present that the
gold standard agrees with.
D
, False Positive - ANSWER The number of tests that say disease is present but negative by
the gold standard.
B
False Negative - ANSWER The number of tests that say disease is not present but the
gold standard says it is.
C
Reliability - ANSWER The reproducibility of similar results under similar circumstances.
Accuracy over a period of time.
ABI - Ankle Brachial Index - ANSWER The ratio of the ankle systolic pressure to the
highest brachial systolic pressure.
Indicates the severity of PAOD.
ABI = > 1.30 - ANSWER Incompressible
ABI = .90 to 1.30 - ANSWER Normal
ABI = .75 to .90 - ANSWER Mild
ABI = .50 to .75 - ANSWER Moderate
ABI = < .50 - ANSWER Severe
ABI = < .35 - ANSWER Tissue threatening
Budd-Chiari syndrome - ANSWER Condition caused by occlusion of the hepatic veins
that drain the liver; either by thrombosis (primary) or compression (secondary). Rare
