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Re: Optimum pressure caveats, indeed!!

Posted by SGS on February 12, 2003 at 17:42:40:

In Reply to: Re: Optimum pressure caveats, indeed!! posted by SGS on February 12, 2003 at 17:22:06:

Turned out I did know the reflex but I didn't know the name of it. (Apparently the hering-breur reflex is caused by the stretch recpetors and results in a weak inhibition of respiration through the CNS- but somebody else must have written this earlier).

Being that it is quite weak I imagine the O2 CO2 and acid based triggers would overcome this effect (i've also tried holding my breath for a long time with a pulse oximeter on and it didn't get below 95% after 2 minutes- so I think there is some reflex to continue respiration in a pattern (a mechanical urge to breath or cardiorespiratory coupling perhaps????) which is independent of these other influences).

Also is it clear that overinflation (or larger than normal inflation) of the lungs actually occurs with CPAP? Does it feel like this to you Sleepycoote? It might do when you are awake and the pressure is superfluous (as you can hold your own airway open when awake). Oh dear I think I'm just confusing myself now...

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