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Spirometry, FRC, and DLCO (Type D), + CV and N2WO (Type DN), featuring reliable and time proven dry rolling seal spirometer, a volumetric spirometer which offers you the highest level of measurement accuracy. It assists operator with guiding messages in evaluating patient performance,
The spirometry test is performed using a device called a spirometer, which comes in several different varieties. Most spirometers display the following graphs, called spirograms: 1  a volume-time curve, showing volume (litres) along the Y-axis and time (seconds) along the X-axis.verage values for forced vital capacity (FVC), forced expiratory volume in 1 second (FEV1) and forced expiratory flow 25â75% (FEF25â75%), according to a study in the United States 2007 of 3,600 subjects aged 4â80 years.