Patient safety Relative contraindication Activities to avoid Medication withhold times Within-test feedback for achieving full exhalation
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Equipment complies with ISO standard Error tolerances of ±2.5% Measurement of inspiration and expiration Revised calibration verification checks Introduced warning messages
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Tidal breathing prior to rapid inspiration to maximal lung volume Full expiration with maximal effort Maximal inspiration back to maximal lung volume End of forced expiration criteria requires a plateau and maximum exhalation time of 15 s Minimum of 6 s expiratory time removed
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Acceptability and reproducibility criteria Methodology for bronchodilator response testing Updated definitions and criteria for analysis of manoeuvres Standardised cues, feedback and warnings to operator
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