I haven't heard of a CPAP popping a hole in a lung, and so far as I know, there is not enough pressure to do so. Actually, even at the highest settings the CPAP is relatively mild compared to what the lung can take in. Your lungs don't inflate all that much from CPAP, the pressure build up is in the throat. You have an automatically regulating pressure system in your lungs - if the pressure builds too high too rapidly, the chest muscles contract and expel the air, and PAP devices aren't known for damaging the lungs from pressure, although CPAP can cause a sort of asthma in some patients - it isn't a serious condition and has more to do with the irritation of the bronchs than anything else, and is not pressure related. Usually changing the settings on the humidifier takes that problem away (but not always).
Come to think of it, the first CPAP was a vacuum cleaner with the hose reversed - that must have been a ton more pressure than modern CPAPs deliver....
The tube going down into a bucket of water is used to inflate collapsed lungs, both in the third world and in the first - I have used it, and all doctors I know of are trained in it for emergency use when "modern" machines aren't available. My biggest worry about the newest generations of doctors in the West is that they aren't getting trained in the "old ways" intensely enough. Skills like that are getting lost in our reliance on computers and fancy machines and shiny devices, and lives are risk of getting lost as well.
(04-24-2013, 08:32 AM)Shastzi Wrote: Indeed the lungs are delicate though some trained individuals can blow up a hot water bottle until it explodes.
In order to do this requires 4 atmospheres! ( 14.7psi * 4 = 58.8psi. Pounds per square inch and not cm of water! )
Don't try THAT at home kids, that is for experts.
1 psi equals about 70 cmH2O.
58.8 psi = 4134 cmH2O
Here a a link to an online calculator which converts from psi to cmH2O or from cmH2O to psi:
Here a a link to an online calculator which converts from kPa to cmH2O or from cmH2O to kPa:
Membership in the Advisory Member group should not be understood as in any way implying medical expertise or qualification for advising Sleep Apnea patients concerning their treatment. The Advisory Member group provides advice and suggestions to Apnea Board administrators and staff on matters concerning Apnea Board operation and administrative policies - not on matters concerning treatment for Sleep Apnea. I think it is now too late to change the name of the group but I think Voting Member group would perhaps have been a more descriptive name for the group.