Chapter 30

Question 1

what is sensitivity?

Answer 1

the ability of a test to detect disease

Question 2

what is the calculation of sensitivity?

Answer 2

of true positive tests / # of all positive diagnoses

Question 3

what is specificity?

Answer 3

the ability of a test to identify normalcy

Question 4

what is calculation for specificity?

Answer 4

of true negative tests/ #of all negative diagnoses

Question 5

what is positive predictive value (PPV)?

Answer 5

how often positive study is correct

Question 6

what is calculation for PPV?

Answer 6

of true positive test/ #of all positive noninvasive studies (true positive + false positives)

Question 7

what is negative predictive value (NPV)?

Answer 7

how often negative study is correct

Question 8

what is the calculation for NPV?

Answer 8

of true negative tests/ # of all negative noninvasive studies (true neg + false neg)

Question 9

what is accuracy?

Answer 9

how good a test is

Question 10

what is calculation for accuracy?

Answer 10

total # of correct tests/ total # of all studies

Question 11

T/F calculation falls between sensitivity and PPV and specificity with NPV

Answer 11

false
sensitivity and specificity
PPV and NPV

Question 12

what marking is on the horizontal axis?

Answer 12

gold standard

Question 13

what marking is on vertical axis?

Answer 13

test

Question 14

how should i label my 4 squares?

Answer 14

A B

C D

Question 15

what is letter A represent?

Answer 15

true positive

Question 16

what does letter B represent?

Answer 16

false positive

Question 17

what does letter C represent?

Answer 17

false negatives

Question 18

what does letter D represent?

Answer 18

true negatives

Question 19

what is the formula for accuracy?

Answer 19

A+D/ A-D

Question 20

what is the formula for sensitivity?

Answer 20

A/ A+C

Question 21

what is the formula for specificity?

Answer 21

D/ B+D

Question 22

what is the formula for PPV?

Answer 22

A/ A+B

Question 23

what is the formula for NPV?

Answer 23

D/ C+D

Question 24

if gold standard is on the vertical axis how does the square look?

Answer 24

A C

B D

Question 25

how should you first remove visible residue on a probe?

Answer 25

with a soft cloth lightly dampened with mild soap and wipe with water dampened cloth

Question 26

T/F if you use isopropyl alcohol you should let it air dry

Answer 26

false

Question 27

what chemicals should you not use to clean a probe?

Answer 27

undiluted bleach, abrasive cleaners, solvents e.g thinner or benzene

Question 28

what are products commonly used with high level disinfection?

Answer 28

glutaraldehdye e.g cidex 
hydrogen peroxide ( >6%)

Question 29

what products are used for low level disinfection?

Answer 29

quarternary ammonium
N-Alkyl e.g T spray II, sani-cloth
hydrogen peroxide (3%)

Question 30

T/F sterile saline is considered a disinfectant agent

Answer 30

false