Differences in the Calculation of the DLCOsb Because of the Timing

Multiple Choice

Differences in the calculation of the DLCOsb because of the timing of the breath-hold period may be minimized by:

A) Having the subject breath hold at 80% VC
B) Measuring breath-hold time from the midpoint of inspiration
C) Having the subject inspire and expire rapidly
D) Limiting breath-hold time to less than 8 seconds