mjl1717
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No, but in 1 second it should include your expiratory reserve vol.+ your tidal volume. {residual vol. would only be measured with a helium technique} Also normal people can only exhale 80% of their vital capacity in 1 sec. because during a forced expiration intrapleural pressure becomes positive/airways are compressed!
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| ssrpk
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hey mjl i agree with u .....residual volume measurement by helium method......there was a post previously regarding spirometry and the answer was total lung capacity tht gives +30cm H2O
how can yuo measure total lung capacity by spirometry???
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| mjl1717
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Im not familiar with lung pressures, but you could add a variation of the IRV+TV+ ERV+ estimate about 1200 ml for RV(70 kg male) for TLC.
The TLC should be around 6700ml.
TV is about 500 to 600 ml
IRV is about 3500ml
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