When I first started using a one-way valve (before I got a passy-muir
brand) I would forget to exhale when I was drinking and my lungs would just
keep filling until the vent high pressured. I was 22 at the time, so I can
see how your 16 month old son could have trouble. It just takes getting use
to. I had to remember to exhale through my nose and mouth. Now it's so
automatic I don't even think about it. I accually exhale through my nose
while I am receiving a breath and sometime wait to exhale after receiving a
full breath.
Jim Lubin
http://www.eskimo.com/~jlubin
------------------------------
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