Spirometers Used to Measure FEV₁ Should Be Able to Measure

question 21

Multiple Choice

Spirometers used to measure FEV₁ should be able to measure flows in the range of 0 to 14 L/sec (ATS-ERS,2005) .The maximal resistance allowable at all flows is:

• A) Less than 6 cmH₂O/L/sec
• B) Less than 1.5 cmH₂O/L/sec
• C) Determined by the type of filter used
• D) One half of the flow rate in L/sec

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