Question

(b) Report your Subject’s MVV and compare to the normal ranges. Can you show me how to find the MVV?

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While FEV measures ventilation performance under resting conditions, MVV, also known as maximal

breathing capacity, tests ventilation during non-resting conditions. The MVV is the maximum volume of air

moved through the respiratory system in one minute while breathing as quickly and deeply as possible.

In simpler words, it is an indicator of the respiratory system’s peak ability to deliver oxygen during

exercise. For patient comfort and safety the test is usually conducted for only 12-15 seconds and the

results are extrapolated to 1 minute.

Average values for males and females are 140–180 and 80–120

liters per minute respectively. MVV can be as high as 200 L/min in endurance trained cyclists, runners and rowers.

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Answer 1

The maximal voluntary ventilation (MVV) is used mainly to measure the neuromuscular and respiratory system and gives an estimate about the maximum volume of air that can be exhaled per minute during the rapid and deep breathing.

MVV=FEV1x40

If MVV/(40*FEV1) is less than 0.80 then the MVV of the person is low.

First we take the Table 1 value

In the time interval of 0-1, the person is having FEV of 4.39

MVV=4.39x40=175.6

Take table 2, the first value for the time interval 0-1 is 2.9

MVV=2.9x40=116

Like this you can calculate for every values given in the table