Hi all!  I am looking for some info for the company I work for, an
occupational hygiene/safety consulting firm called Lockhart Risk
Management Ltd. up in Vancouver, BC.  I have already searched databases
at OSHA, NIOSH, ACGIH, etc . . .

I am trying to find out if there is any info on the use of respirators
(specifically if there are cartridges available) for use in environments
such as operating theaters, dentist's offices, etc.  I am not looking for
a company spiel about how great thier respirators are, just an indication
of their level of usage, and if they are used, the decision that led to
doing so (ie, some official type of guideline from a regulatory body).

Thanks if you can help . . .

And now I'm passing through
the one who's known as you
and in the end you'll never know I do
"Little Neutrino", Klaatu

I'm a dentist and I administer N2O/O2.  What do you need to know?