The message <001001bfecbd$beb0dfe0$4504883e@dell>
from "John Apps" <[log in to unmask]> contains these words:
> I'm using nasal cannulae to monitor end tidal CO2 prehospital on
> spontaneously breathing patients. However trials on my family members show
> considerable variation in ETCO2, mainly depending on how much mouth
> breathing, as opposed to nasal breathing is going on. This makes me hesitant
> to totally rely on the nasal cannulae! Most conscious patients can simply
> seal their lips around the sampling connector which I assume gives a more
> representative result.
Though this sounds an interesting idea, I seem to recall people with
COPD mouth breathing a fair deal. 'Pursed lip' breathing is fairly
characteristic in some states and I doubt that breathless people
would be able to seal their lips for long.
--
Helen D. Vecht
[log in to unmask]
Somewhere around North-West London
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