Prep for USMLEPrep for USMLE
         Forum      |     Resources New Posts   |   Register   |   Login

 forced expiratory volume  

Post Reply  
  • 0/5
  • 1
  • 2
  • 3
  • 4
  • 5

Author4 Posts

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.


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!


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???


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

Bookmark and Share

This thread is closed, so you cannot post a reply.

Login or Register to post messages

show Similar forum topics

expiratory flow rate
forced diuresis
Forced vital capacity. - Answer!
show Related resources

Advertise | Support | Premium | Contact