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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,
Spirometry. 1  Spirometry is a very common test to help you and your doctor understand your asthma better, and check how it is improving with treatment. 2  Your doctor may order a bronchodilator to be given as part of spirometry. 3  The doctor may also order tests that measure your lung volumes.