Coughing into full face mask and pressure

Hello,

Anyone with good air pressure physics knowledge on the board? I came across the following NIH abstract, someone posted here a while back, about the pressure changes in the middle ear with CPAP use under varying levels. (http://www.ncbi.nlm.nih.gov/pubmed/22252535). I didn't read the whole thing and it appears you have to pay for it, but the free abstract says basically what everyone here says -- yes, CPAP pressure does travel through your e.tube to your middle ear, and simply that alone could trigger vestibular problems with some people. (of course most people are fine with it).

Please assume I failed physics in school and go gently on me like an ELI5. My question is: If a person is using a full-face mask, and they also have a fairly bad persistent cough, like a bronchial cough, and coughed into their FF mask many times during the night, would the act of coughing cause even higher pressure spikes to reach the middle ear? Possibly because it is a "mostly" self contained circuit (minus the exhaust vent), so wouldn't most of the extra air pressure created by forcibly expelling air from your lungs during coughing, end up inside your head?

I think a doctor would be the best person to ask about that - it is technically an anatomy question, probably for an ENTl, though someone else here probably knows the answer.

supereyes wrote:Hello,

Anyone with good air pressure physics knowledge on the board? I came across the following NIH abstract, someone posted here a while back, about the pressure changes in the middle ear with CPAP use under varying levels. (http://www.ncbi.nlm.nih.gov/pubmed/22252535). I didn't read the whole thing and it appears you have to pay for it, but the free abstract says basically what everyone here says -- yes, CPAP pressure does travel through your e.tube to your middle ear, and simply that alone could trigger vestibular problems with some people. (of course most people are fine with it).

Please assume I failed physics in school and go gently on me like an ELI5. My question is: If a person is using a full-face mask, and they also have a fairly bad persistent cough, like a bronchial cough, and coughed into their FF mask many times during the night, would the act of coughing cause even higher pressure spikes to reach the middle ear? Possibly because it is a "mostly" self contained circuit (minus the exhaust vent), so wouldn't most of the extra air pressure created by forcibly expelling air from your lungs during coughing, end up inside your head?

I don't know about the pressure, but I use a full face mask, and a few months ago, I had a bad cough for several nights. Single coughs are no problem for me at all, but when i had a coughing fit, I would feel like I was running out of air and rip off the mask. I solved the problem by raising my minimum pressure from 11-13. Then, I could have a coughing fit, enough air, and no problems.I do have a history of ear problems, but nothing with the cpap I have been using for the last 3 years.

supereyes wrote:Hello,

Anyone with good air pressure physics knowledge on the board? I came across the following NIH abstract, someone posted here a while back, about the pressure changes in the middle ear with CPAP use under varying levels. (http://www.ncbi.nlm.nih.gov/pubmed/22252535). I didn't read the whole thing and it appears you have to pay for it, but the free abstract says basically what everyone here says -- yes, CPAP pressure does travel through your e.tube to your middle ear, and simply that alone could trigger vestibular problems with some people. (of course most people are fine with it).

Please assume I failed physics in school and go gently on me like an ELI5. My question is: If a person is using a full-face mask, and they also have a fairly bad persistent cough, like a bronchial cough, and coughed into their FF mask many times during the night, would the act of coughing cause even higher pressure spikes to reach the middle ear? Possibly because it is a "mostly" self contained circuit (minus the exhaust vent), so wouldn't most of the extra air pressure created by forcibly expelling air from your lungs during coughing, end up inside your head?

I seriously doubt it. If you're talking about APAPs when using a range of pressures, it isn't logical. Coughing is a product of exhale. Flow Limitations and Vibratory Snores, which are two of the things that trigger APAPs to increase pressures are essentially "inhale" cycle events. And, you can't cough and inhale at the same time.......at least I don't THINK so.

I don't know if this is relevant, but every time someone comes on the forum and asks about coughing and CPAP, I ask if they're taking the blood pressure medication Lisinopril. It's a known contributor to dry persistent coughing and other blood pressure medications (ARBs) which don't cause that should be considered.


Den

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