Respiratory function tests quiz

Question 1

what do respiratory rates measure?

Answer 1

how much air is moved in a given amount of time

Question 2

what is MVR?

Answer 2

minute volume of respiration: total volume of air moved per minute

Question 3

what is the equation for finding MVR? the units of MVR?

Answer 3

TV x BPM = MVR in L/min

Question 4

what is a con of relying on MVR?

Answer 4

it contains the volume of air within the conducting zone (trachea, bronchi, etc.) which is approx. 0.150 L

Question 5

what is AVR?

Answer 5

alveolar ventilation rate: volume of usable air moved per minute

Question 6

what is the equation of finding AVR? the units of AVR?

Answer 6

(TV - 0.150) x BPM = AVR in L/min

Question 7

what is percent effective ventilation?

Answer 7

the percent of air actually being used for external respiration (within alveoli and pulmonary capillaries)

Question 8

what is the equation of finding percent effective ventilation?

Answer 8

Question 9

Kent takes 8 breaths in 12 seconds. His tidal volume is 0.650 L. Calculate Kent’s MVR

Answer 9

Question 10

Kent takes 8 breaths in 12 seconds. His tidal volume is 0.650 L. His conducting zone volume is average. Calculate Kent’s AVR

Answer 10

Question 11

would the percent effective ventilation go up or down with panting/hyperventilation?

Answer 11

value goes down with panting (rapid shallow breaths)
value goes up with hyperventilation (big breaths)

Question 12

what is FEV? what does it measure?

Answer 12

forced expiratory volume: measures how fast a max inhale can be exhaled

Question 13

what is FVC?

Answer 13

forced vital capacity: max air forcibly exhaled after a max inhale

Question 14

how to calculate FEV 1, 2, and 3?

Answer 14

Question 15

what are the expected ranges of FEV 1, 2, and 3?

Answer 15

1 = 66-83%
2 = 75-94%
3 = 78-97%

Question 16

what would you expect if FEV values were lower than expected? why?

Answer 16

COPD
because patients have difficulty exhaling, so exhaling volume would be low

Question 17

sketch FEV inverted graph

Answer 17

Question 18

what is MVV? what does it measure?

Answer 18

maximal voluntary volume: measures how much air moved per minute when breathing as fast and deep as possible (hyperventilating)

Question 19

what is the equation for MVV? units for MVV?

Answer 19

Question 20

Christian counted 21 breaths in 12 seconds. His average volume per breath was 1.857. calculate his MVV.

Answer 20

Question 21

Gail took 11 breaths in 12 seconds. Average volume of each breath was 1.846 L.
Jared took 30 breaths in 12 seconds. Average volume of each breath was 0.385 L.
Calculate both MVV.
which was hyperventilating and which was likely panting? why?

Answer 21

Gail was hyperventilating because his MVV was around 100 L/min or more
Jared was panting because he had increased number of breaths and a lower MVV.

Question 22

what is the expected MVV?

Answer 22

around 100 L/min

Question 23

sketch MVV graph.

Answer 23

Question 24

what did we do in the FEV experiment?

Answer 24

3 normal breaths
one big inhale
deep exhale for 3 seconds
all is done seated and sat upright

Question 25

what did we do in the MVV experiment?

Answer 25

3 normal breaths
hyperventilate for 15 seconds
all done seated and sat upright