The following information was entered into the computer: our initial, date-of-birth, gender and height in inches.
We put a nose clip on to prevent air leakage out of the nose. We waited with our mouth off the mouthpiece to allow the pneumotach to equilibrate. When given a notification, we sealed our mouth onto the mouthpiece and started with tidal breathing.
When the computer sensed stable tidal breathing, we were given the permission to take a large inhalation of air, exhale completely and return to tidal breathing.
The SVC report was printed.
With a copy of the
SVC report, we marked four straight and leveled horizontal lines on the highest and lowest point of the SVC curve and marked the highest and lowest point of the tidal volume.
We marked six vertical lines that represented vital capacity (VC), tidal volume (TV), inspiratory reserve volume (IRV), inspiratory capacity (IC), expiratory reserve volume (ERV) and expiratory capacity (EC).
After marking the lines, we measured the lengths in millimeters and multiplied each of them by 57.14 milliliters/millimeters. Converting our results from millimeters to milliliters.
We compared our results with the averages of the lab manual and we compared our vital capacities to the predicted vital capacities from the nomogram.