final exam Flashcards
What can doppler ultra sound be used for and what does it measure?
Colorized movement using soundwaves to track flow of RBCs.
blue: towards, red: away
degree of stenosis is correlated with
risk of stroke
Test to perfrom to detect a murmur?
a cardiac echocardiogram
what do multiple colors in a doppler ecg imply?
turbulence
wht does the T wave in an EEG represent?
repolarization of the ventirlces
atrial fibrillation can predisopse someone to have
clots in their brain!
What is Sensitivity, and when is sensitivty good?
It is the probability that a person with the disease will test positive for that disease. It is good in tests for very serious diseases that you do not want to miss. It has very few false negatives.
what is specificity? and when is it good.
Specificity is the probability that a person without the disease will test negative . It is good when the reprocussions of testing positive are very serious, such as cancer or AIDS. It has very few false positives
What is predictive value positive?
It is the probability that an individual who has tested positive actually has the disease
What is a predictive value negative?
it is the probability that a preson who tested negative actually does not have the disease
What is the formula for sensitivity?
A/A+C
What is the formula for specificity?
D / D +B
What is the formula for positive predictive value/
A / A +B
What is the formula for negative predictive value
D / D +C
describe diagnostic related groups
just for inpatients / hospitalized services. medicare pays the average on a specific diagnosis.
