2 Learning ObjectivesDescribe the methods/processes for recording respiratory variables and analyzing a recording to derive respiratory parameters using PowerLab.Understand the relationship of Volume-Time curve and Flow-Volume Curve.Integrate the principles (dynamic compression of airway, equal pressure point) to understand flow rate measurement, and flow-volume curve.Designate the lung volume and flow rate on the curve.
3 Measurement of Airway Resistance Body plethysmograph: to determine Palv -- ไม่เรียนClosing volume -- ไม่เรียนDetermine the decrease in expiratory airflow among populationForced expiratory spirography --- Lab Nov 1 & todayFlow-volume loop/curve TODAYPPB - PalvR ==VVV =volumetime
4 Flow DeterminationVolume displacement spirometer is used to measure a change in lung volume versus time. The slope or the rate of change of the volume is flow.Direct measurement with a pneumotachometer.
6 Forced Expiratory Spirogram FEV1 (Forced expiratory volume in 1 second)FVC (Forced vital capacity)FEV1/FVC (Ratio FEV1 over FVC)Normal FEV1/FVC ~ 0.8 or 80%
7 Flow DeterminationVolume displacement spirometer is used to measure a change in lung volume versus time. The slope or the rate of change of the volume is flow.Direct measurement with a pneumotachometer. The volume is then calculated as the integral of flow:V = ∫ V dt
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