RCP 140 FINAL EXAM REVIEW QUESTIONS AND
ANSWERS
Most black vs. most white on x-ray - Answers - air=black
fat=grey
water=grey/white
bone=white
metal=whitest
Why do you do AP rather than PA? - Answers - most convient for pts. in bed
AP-most common, distorts image making heart appear larger
PA-back to front, requires pt. to be standing, more preferred
How far is x-ray shot? - Answers - 6ft
Clavicle position on CXR - Answers - should be equal distant
How to know inspiratory vs expiratory CXR - Answers - inspiratory film will show 10-11
ribs
expiratory film will show 7-8 ribs
When is lateral dicupidis used? - Answers - to further access P.E
Air bronchogram sign-what does this indicate and how is it formed? - Answers -
indicates lung consolidation, pulmonary edema, atelectasis
formed by alveoli filled w/ fluid
Signs of pleural effusion?
(multiple, multiple) - Answers - large/lobular
meniscus sign
lots of fluid around heart in the lung
usually linking to CHF
push structures away(heart, trach)
Signs of atelectasis
, (multiple, multiple) - Answers - elevation of diaphragm
hilar/pulmonary artery displacement
minor fisher shift toward area of collapse
trach and heart being pulled toward affected side
air bronchogram, bronchi closer together
Calculate FEV1 - Answers - %change
post-pre/pre*100
Describe flow vol. loop - Answers - useful in determining site of airway obstruction due
to characteristic appearance of the loops
Why is diffusion capacity decreased in pts. w/ pulmonary fibrosis? - Answers - restrictive
lung diseases like pulmonary fibrosis cause scarring and thickening of area b/t alveoli
and capillaries
What does it mean if PaO2/Fio2 increases? - Answers - normal is >350
<200 indication for mech. vent.
What is the number one best value to differentiate between obstructive vs. restrictive? -
Answers - FVC/FEV1
What does CcO2-CaO2 tell us? - Answers - as it becomes smaller, lung function
improves
Given % predicted and how to determine whether it is restrictive, obstructive or normal -
Answers -
Calibration of PFT equipment
-study facts of calibration
-how often should it be done? - Answers -
Calculate % error - Answers - avg.-vol injected/vol. injected*100
Why do you use super syringe at 3 different speeds? - Answers -
Calc TLC - Answers - FRC+IC
(FRC-ERV)+VC
ANSWERS
Most black vs. most white on x-ray - Answers - air=black
fat=grey
water=grey/white
bone=white
metal=whitest
Why do you do AP rather than PA? - Answers - most convient for pts. in bed
AP-most common, distorts image making heart appear larger
PA-back to front, requires pt. to be standing, more preferred
How far is x-ray shot? - Answers - 6ft
Clavicle position on CXR - Answers - should be equal distant
How to know inspiratory vs expiratory CXR - Answers - inspiratory film will show 10-11
ribs
expiratory film will show 7-8 ribs
When is lateral dicupidis used? - Answers - to further access P.E
Air bronchogram sign-what does this indicate and how is it formed? - Answers -
indicates lung consolidation, pulmonary edema, atelectasis
formed by alveoli filled w/ fluid
Signs of pleural effusion?
(multiple, multiple) - Answers - large/lobular
meniscus sign
lots of fluid around heart in the lung
usually linking to CHF
push structures away(heart, trach)
Signs of atelectasis
, (multiple, multiple) - Answers - elevation of diaphragm
hilar/pulmonary artery displacement
minor fisher shift toward area of collapse
trach and heart being pulled toward affected side
air bronchogram, bronchi closer together
Calculate FEV1 - Answers - %change
post-pre/pre*100
Describe flow vol. loop - Answers - useful in determining site of airway obstruction due
to characteristic appearance of the loops
Why is diffusion capacity decreased in pts. w/ pulmonary fibrosis? - Answers - restrictive
lung diseases like pulmonary fibrosis cause scarring and thickening of area b/t alveoli
and capillaries
What does it mean if PaO2/Fio2 increases? - Answers - normal is >350
<200 indication for mech. vent.
What is the number one best value to differentiate between obstructive vs. restrictive? -
Answers - FVC/FEV1
What does CcO2-CaO2 tell us? - Answers - as it becomes smaller, lung function
improves
Given % predicted and how to determine whether it is restrictive, obstructive or normal -
Answers -
Calibration of PFT equipment
-study facts of calibration
-how often should it be done? - Answers -
Calculate % error - Answers - avg.-vol injected/vol. injected*100
Why do you use super syringe at 3 different speeds? - Answers -
Calc TLC - Answers - FRC+IC
(FRC-ERV)+VC
