1Lab 37AMeasuring Respiratory PhysiologyKey Respiratory Capacities• Tidal volume: the normal amount you breathe in and out at rest.•ERV(expiratory reserve volume): the amount of air you have left in your lungs after you exhale normally• Vital capacity: Total air volume available.•IRV(inspiratory reserve volume): the amount of air you can inhale after you inhale normally• Residual volume: air left in lungs after maximal exhalation.Spirometers• We will be measuring expiration only.• Do not do it if you are sick• Use a disposable mouthpiece• Use wet flow spirometer to measure:• Tidal volume: exhale just as you are doing right now, listing to me talk (no, I don’t mean snoring). Should be around 500ml (.5L)•ERV(expiratory reserve volume): exhale normally, pause, hold your nose and exhale as much more as you can into the tube• Vital capacity: inhale max, exhale max, then inhale max again, clip nose, and exhale as much as possible into the hoseTo do:• Activity 1: operate the model lung• Activity 2: listen to respiratory sounds• Activity 3: gather data on nonrecordingspirometers (groups of 3-4) and follow along with manual pages 552-54:• Measure respirations per minute (have a partner count your breaths)• Measure 3 times, record in lab manual, and calculate avg for:–TV–ERV –VC To do:• Calculate IRV• Compare to tables (557-58) based on age, height, and sex• Put your final data into the tables on p.563 “Pulmonary Measurements” and 564 “Calculated Pulmonary Capacities.”• Answer the 3 questions after the table on p.564• For minute respiratory volume (MRV) and IRV, read your lab manual to determine how to calculate these values. • VC = TV+ IRV + ERV2Assignment• Pages 552-554 with data• Pages 563, 564 with data entered into 2 tables titled “Pulmonary Measurements”and “Calculated Pulmonary Capacities”and answers to the three questions on p. 564• Review Sheet numbers 1-13 ONLY on pages 569-71• Due next
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