the results indicated that : ( 1 ) significant differences were observed between technicians in the administration of the tests to obtain fvc while the subjects breathed room air and while they breathed he-o2 , ( 2 ) there were significant differences between the 3 technicians in the interpretation of mmfr , and ( 3 ) the between-technician variation in the administration of the tests with respect to delta t and with he-o2 in general were not significantly different from that of the other spirometric variables studied .
C1875235
he-o2
C0030054
he-o2