01:146:357 Lecture Notes - Lecture 9: Cierva C.4, Pulmonary Function Testing, Functional Residual Capacity

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Classic spirometry and how it was used to estimate respiratory volumes and capacities: simple traditional spirometer. Inhale or exhale moves the floating drop, moving up and down drawing pen: spirographic record. Ii: tidal volume tv: the volume of air moved into or out of the lungs during quiet breathing, relaxed breathing, regular curve in spirometry, around 500 ml (. 5 l), however varies by individual. 1: how much air lungs can hold. Shows the proportion of a person"s vital capacity that they are able to expire in the first second of expiration: normalize or standardize individuals, normally 80% Expirimental procedures: calibrate instruemnnt: zero the pod. Inthe steady state record capnographic values: hr, rr, etco2, hbo2: with nose clip in place, breathe normally into apparatus for 45-50 sec. 2: on cue perform the forced vital capacity (fvc) exercise. Record the lowest values for etco2 and hbo2: exeripemtn 3 simulated copd - airway obstruction, same as 2.

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