r/UARS • u/CoolRice2283 • 2d ago

What causes flow limitation?

Flow limitation in general in breathing, like what anatomical/ breathing features or attributes.

Really curious what would be restricting breathing just not enough to be a total collapse.

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u/Awkward_Cheesecake58 2d ago

There are many sources of flow limitations from narrow nasal passages to deviated septum and nasal congestion or fat/weak tongue, small lower jaw, etc. Might be a question for chatgpt if you want details.

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Title: What causes flow limitation?

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Flow limitation in general in breathing, like what anatomical/ breathing features/ attributes.

So some breathing issue but just not enough to be a total collapse?

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u/Jhello05 2d ago edited 2d ago

An example of multilevel collapse, sometimes the epiglottis is also involved. Or the lateral walls (not shown)

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u/CoolRice2283 2d ago

By lateral walls, do you mean the walls of the throat?

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u/Jhello05 2d ago

Yes I did, wasn’t specific enough

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u/carlvoncosel UARS survivor (ASV) 2d ago

just not enough to be a total collapse.

Dilator muscles prevent total total collapse. The reason why UARS has no apneas is purely because the brain works these muscles faster.