PFT

Question 1

FEV1

Answer 1

forced expiratory volume in 1 second; volume of air forcible expired from a maximum inspiratory effort in the first second

Question 2

FET

Answer 2

forced expiratory time (during FVC maneuver)

Question 3

FVC

Answer 3

forced vital capacity; total volume that can be forcefully expired from a maximal inspiratory effort

Question 4

IC

Answer 4

inspiratory capacity

Question 5

Inspiratory reserve volume (IRV) + tidal volume (TV)

Answer 5

inspiratory capacity

Question 6

IRV

Answer 6

inspiratory reserve volume; maximum volume of air that can be inhaled from the end-inspiratory tidal position

Question 7

TV

Answer 7

tidal volume; volume of air inhaled or exhaled with each breath when a person is breathing at rest

Question 8

ERV

Answer 8

expiratory reserve volume; maximum amount that be exhaled from end expiratory tidal position

Question 9

RV

Answer 9

residual volume; volume of air that remains in the lungs after maximal exhalation

Question 10

FRC

Answer 10

functional residual capacity; volume of air in the lungs following a tidal volume exhalation

Question 11

TLC

Answer 11

total lung capacity

Question 12

IC + FRC

Answer 12

TLC

Question 13

IRV + TV + ERV + RV

Answer 13

TLC

Question 14

how to measure residual volume

Answer 14

special tests that require the patient either to breathe an inert gas such as helium or to sit in an airtight booth in which the pressure is measured as he or she breaths
- NOT spirometry

Question 15

FEV1/FVC ratio is less than the lower limit of normal –> what does this mean?

Answer 15

obstructive disease

Question 16

FEV1/FVC ratio is more than the lower limit of normal –> what does this mean?

Answer 16

restrictive or normal disease

Question 17

FEV1/FVC ratio is more than lower limit of normal and FVC is less than lower limit of normal

Answer 17

restrictive pattern

Question 18

FEV1/FVC ratio is more than lower limit of normal and FVC is more than lower limit of normal

Answer 18

normal spirometry study

Question 19

FEV1/FVC ratio is more than lower limit of normal and FVC is less than lower limit of normal, and TLC is more than lower limit of normal

Answer 19

normal test

Question 20

FEV1/FVC ratio is more than lower limit of normal and FVC is less than lower limit of normal, and TLC is less than lower limit of normal

Answer 20

restrictive disease, now quantitate the restriction

Question 21

FEV1/FVC ratio is less than the lower limit of normal and the FVC is more than the lower limit of normal

Answer 21

pure obstruction

Question 22

FEV1/FVC ratio is less than the lower limit of normal and the FVC is less than the lower limit of normal, and the TLC is not known

Answer 22

possible mixed obstruction and restriction or pure obstruction with pseudorestriction

Question 23

FEV1/FVC ratio is less than the lower limit of normal and the FVC is less than the lower limit of normal, and the TLC is less than the lower limit of normal

Answer 23

mixed obstruction and restriction

Question 24

FEV1/FVC ratio is less than the lower limit of normal and the FVC is less than the lower limit of normal, and the TLC is more than the lower limit of normal

Answer 24

pure obstruction with pseudorestriction

Question 25

compare FVC in obstructive and restrictive dz

Answer 25

obstructive: decreased or normal
restrictive: decreased

Question 26

compare FEV1 in obstructive and restrictive dz

Answer 26

obstructive: decreased
restrictive: decreased or normal

Question 27

compare FEV1/FVC ratio in obstructive and restrictive dz

Answer 27

obstructive: decreased
restrictive: normal

Question 28

compare TLC ratio in obstructive and restrictive dz

Answer 28

obstructive: normal or increased
restrictive: decreased