10-09-2023, 05:38 PM
Flow curve shape - what does it say?
I was reading about flow shapes and was curious about mine. It seems unusual with a rise, plateau and then another rise. Anything I can learn from this?
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Flow curve shape - what does it say?
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Flow curve shape - what does it say?
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Flow curve shape - what does it say?
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pezhead99
Posts: 24 Threads: 5 Joined: Dec 2021
Machine: Airsense10 
PeaceLoveAndPizza
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Posts: 1,728 Threads: 13 Joined: Dec 2022
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10-09-2023, 07:03 PM
RE: Flow curve shape - what does it say?
Looks like expiratory mouth breathing, maybe with a bit of snoring. See the attached…
pezhead99
Posts: 24 Threads: 5 Joined: Dec 2021
Machine: Airsense10
10-09-2023, 07:43 PM
RE: Flow curve shape - what does it say?
Thanks for the helpful chart! I was actually thinking mouth breathing so I tried mouth taping. To compare, here's the flow curve with mouth taping. It looks very similar to me...?
PeaceLoveAndPizza
Wiki Editor
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10-09-2023, 08:47 PM
RE: Flow curve shape - what does it say?
It does look the same to me as well.
Hopefully someone more experienced will jump in with some thoughts.
gainerfull
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10-10-2023, 11:47 AM
RE: Flow curve shape - what does it say?
Can you include the flow limit chart with the zoomed in view? Looks like flow limited breathing to me.
pezhead99
Posts: 24 Threads: 5 Joined: Dec 2021
Machine: Airsense10
10-10-2023, 07:18 PM
RE: Flow curve shape - what does it say?
I have some flow limitations but most of the time it's non-existent. Here's a zoomed out view with a mix of both. 95% flow limit last night was .08 which seems to be low/normal?
CPAPfriend
Posts: 223 Threads: 2 Joined: Sep 2023
Machine: Airsense 10
10-10-2023, 09:15 PM
RE: Flow curve shape - what does it say?
Keep in mind that the flow-limit chart is not as sensitive as the flowrate chart, and, in the pictures you shared, I observe several flattened and multi-peaked peaks in the waveforms. Theyre not perfect, by any means.
Some of them also look like the class 6 in pic attached, from the following study, which characterizes them as "marked tracheal traction during lung inflation": https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4688581/
pezhead99
Posts: 24 Threads: 5 Joined: Dec 2021
Machine: Airsense10
10-10-2023, 09:45 PM
RE: Flow curve shape - what does it say?
Thanks for the reply! This is good information - I’ll admit I don’t really understand how to address the flow limitation. Any resources or suggested actions would be much appreciated!
CPAPfriend
Posts: 223 Threads: 2 Joined: Sep 2023
Machine: Airsense 10
10-10-2023, 09:58 PM
RE: Flow curve shape - what does it say?
Once obstructions are resolved, flow limit is best treated through increasing pressure differential, which is IPAP - EPAP or EPR, etc. It can also be resolved by increasing pressure.
pezhead99
Posts: 24 Threads: 5 Joined: Dec 2021
Machine: Airsense10
10-10-2023, 10:07 PM
RE: Flow curve shape - what does it say?
Got it thanks! I have my EPR set to 3. Meeting with my sleep doc tomorrow and I have some good questions to ask. Thanks all!
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Flow curve shape - what does it say?
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Flow curve shape - what does it say?
