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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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