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DATOSPIR TOUCH User’s Manual 50 The data screen shows the observed values in PRE and POST mode and the method of comparison between them, depending on the option selected in the CUSTOMIZATION MENU. • • • • Weighted % between PRE and POST % between REF (Predicted) and POST % between PRE and POST Difference between PRE and POST Thus, it may provide a single report of spirometric results before (PRE) and after (POST) application of a bronchodilator drug. 4.4 1 SLOW VITAL CAPACITY «VC» TEST Access the test by pressing , from the main screen. • The axes are always displayed in VOLUME/TIME mode. • The equipment saves a maximum of 8 maneuvers ordered according to the VC value, where M1 is the best VC and M8 the worst. • The maximum time allowed for the maneuver is 45 seconds. • To measure the ERV and TV parameters correctly, each maneuver must have at least four respiratory cycles. 511-B00-MU2 • REV. 1 .06