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leenah
Forum Newbie Topics: 6 Posts: 22 |
hi everyone .I'm havimg a problem solving problems that present { qbank} with a FEV spirograph does any one know a good source prefer online that explain those. thanks
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mjl1717
| Forum Junior  Topics: 964 Posts: 5442
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
| Forum Junior  Topics: 154 Posts: 2850
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
| Forum Junior Topics: 964 Posts: 5442
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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