ARDMS RVT EXAM QUESTIONS AND ACCURATE ANSWERS

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