Then we look for type of F-V abnormalities in Unacceptable (Questionable) spirogram such as Variable effort, Notch: A notch in initial part indicates a cough or hesitant start.
A total of 207 patients with spirogram enrolled for study between July 2015 and Sep 2015.
37 percent and only half of spirogram fulfil criteria of reversibility.
It was observed that frequency of reversibility testing performed in only one-third of obstructive spirogram.
For diagnostic purposes there have to be two or three acceptable spirograms
in preschool or school-age children, respectively.
At a minimum, a calibration and maintenance log and electronic or hard copies of whole spirograms must be kept, so that the accuracy and precision of past tests can be verified.
We thank other SATS council members for their assessment and approval of this manuscript, the pulmonary function technologists at Tygerberg Academic Hospital for providing the spirograms, and Carol Lochner, who complied all the figures.
Minimum scale for spirograms * Instrument display Parameter Required resolution Scaling Volume 0.
Forced expiratory spirograms
were performed before and after work shifts on the first day back to work after a 2-day rest period.
All study participants had at least three reproducible spirograms before and after visiting the beach, and the best values from these three spirograms were used for data analysis (American Thoracic Society 1991).
However, using the American Thoracic Society standards, it is almost impossible to reproduce three spirograms within the guidelines without maximal effort, making spirometry an objective measure of lung function.
preexposure/postexposure); all study participants had at least three reproducible spirograms
before and after visiting the beach.