To what should all spirometric values obtained under ambient conditions be converted?
a. Ambient temperature and pressure, satu-rated (ATPS)
b. Standard temperature and pressure, dry (STPD)
c. Body temperature, ambient pressure, sat-urated (BTPS)
d. Ambient temperature and pressure, dry (ATPD)
ANS: C
All lung volumes and capacities must be reported under BTPS conditions.
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