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### 16 Cards in this Set

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 What is tidal volume? V(t); Volume of a normal breath at rest(average 500ml) What is Inspiratory reserve volume? (IRV); Additional volume of gas that can be inspired above the V(t).(average 3L) What is Expiratory reserve volume? (ERV); Volume of gas that can be forcefully expired after a normal passive expiration(average 1.3L) What is Residual volume? (RV); Volume of gas that remains after maximal expiration(average 1.5L) How are lung volumes and capacities related? Capacity= sum of 2 volumes. What is total lung capacity? Volume of gas present after a maximal inspiration(average 6L) What is vital capacity? (VC); Maximal volume that can be expelled after a maximal inspiration(average 4.5L) What is functional residual capacity? (FRC); Volume remaining at the end of a normal breath at rest(average 3L) What are the volumes that make up the following capacities: Inspiratory capacity (IC) FRC VC TLC IC=V(t) + IRV FRC=RV+ERV VC=ERV=V(t)+IRV TLC=RV=ERV+V(t)+IRV Which lung volumes and capacities are estimated? RV, FRC, and TLC How does age affect the following parameters of pulmonary function tests(PFTs)? TLC RV VC CV FRC TLC= decreased RV= Increased VC= Decreased CV= Increased FRC= No change Define minute ventilation (Ve). Volume of air inspired or expired per minute. What is the formula for minute ventilation expression? V(e)=V(t)X frequency What is Forced vital capacity? (FVC); Volume exhaled with maximal expiratory effort What is Forced expiratory volume in 1 second? (FEV1); Volume that can be forcefully expired in 1 second. What is the normal percentage of FEV1 per FVC? 75-80%(FEV1/FVC=0.8).