Mastering the Nitrogen Washout Test: Small Airways Assessment Explained

Explore the nitrogen washout test and closing volume in small airways assessment. Our top-viewed video in the Pulmonary Function Testing Essentials course offers insights into uncommon tests for respiratory function. Learn essential spirometry techniques and interpretation skills.
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[@radharajoli7675]

Thank you so much. I finally understood.

[@abdussamad657]

Really easy to understand thanks for making such a nice video

[@cutevideos6263]

It's simple and easily understandable in ur video😍

[@abcde......5260]

Great lecture 💖💖💖

[@arh1511]

Nice Explaination.. thanks a lot

[@gauravthakre5842]

So much of help

[@docank9686]

U made my day

[@malathi9417]

Very informative😇😇😇😇. Tqsm☺

[@tonym4308]

Is 2:59 why emphysema patients have pursed lip breathing? Is this why they create PEEP?

[@hollyhermann-sorensen5974]

why would the closing volume be greater in small airways diseases? It seems like the closing volume would be less than normal if the airways. Thanks for this video!! This concept is a tricky one to understand!

[@drsanyamkhurana]

I guess that's because small airways in the lower lung will close earlier than usual, probably due to shift in equal pressure point. And since the lower airways are now closed, only the air from apical will go out through the trachea, which has higher nitrogen concentration. So in conclusion, the slope of phase 4 will reach earlier than usual. Hope that helps!

[@hollyhermann-sorensen5974]

@@drsanyamkhurana Thank you for responding! I think this makes a bit more sense.

[@hennadusk9652]

Most probably because the smaller airways may have obstruction or restriction and thus amt of air occupied by them will be less which will result in expired volume being more than usual (25% of vital capacity) hope it helps 👍

[@aeon5048]

Because of gas trapping, reduced elasticity due to age or disease means it takes longer for the inhaled gas to be cleared, thus greater closing volume

[@doctorsimran9080]

@@aeon5048 yes, makes sense thank you

[@noblescentedking2891]

What is the disease process if the nitrogen washout is lower than predicted value ? 75% of predicted

[@amjadsalah99]

Beauty

[@kca7695]

🙏🙏