A spirometer recorder used for plotting flow-volume curves has a volume (x axis)sensitivity of 25 mm/L.The flow axis (y axis)sensitivity should be:
A) 12.5 mm/L/sec
B) 25.0 mm/L/sec
C) 50.0 mm/L/sec
D) 50.0 mm/L

Question

Quizplus · Accepted Answer

Flow is the change in volume over time, so the sensitivity of the flow axis should be in units of volume (mm/L) divided by time (sec). Therefore, the correct sensitivity for the flow axis is 25 mm/L divided by 0.5 sec (the standard time for a flow-volume curve) which equals 50 mm/L/sec. So, the best choice is C.

A Spirometer Recorder Used for Plotting Flow-Volume Curves Has a Volume