> Firstly, it is interesting (I think) that 100ml of air on the ground will
> expand to about 140ml air at cabin pressure (6-8000 ft) (Obviously if you
> have a sudden decompression eg window blows out the expansion will be a lot
> more and sudden etc, but you will probably have better things to think about
> if that happens ...) Advice is if a patient has a pneumothorax they should
> only fly with a chest drain in so that the excess air produced by the vol
> expansion is blown off.
On our recent air canada flight from Glasgow to Toronto I took my nonin
finger sao2 monitor in my pocket.
Sa02 for me and my other half was 97-99% before take off and sat stubornly
at 91-93% when tested intermittently on the flight (ie: between movies and
meals).
Aside from proving what a sad person I am, would this drop in sats not have
a clinical effect on the conditions being discussed.
(Of course, my interest was more to do with restricting o2 flow on long haul
flights to save money and the effect this might be having on air rage - I
had a bit of a headache on the flight and felt terrible when we arrived, but
fortunately managed to resist the temptation to be unnecessarily violent).
Robbie Coull
email: [log in to unmask] website: http://www.coull.net
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