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When you give 6% des with 2 L of O2, what is the FiO2?
100 or 94%
100 or 94%
When you give 6% des with 2 L of O2, what is the FiO2?
100 or 94%
when you give 6% des with 2 l of o2, what is the fio2?
100 or 94%
Why is it everybody charts 6% des with a FiO2 of 1.0?
urge said:When you give 6% des with 2 L of O2, what is the FiO2?
100 or 94%
urge said:Why is it everybody charts 6% des with a FiO2 of 1.0?
Anesthesia vaporizers deliver a constant partial pressure. Not a constant volume percent.
Anesthesia vaporizers deliver a constant partial pressure. Not a constant volume percent. Also there is a significant range where a vaporizer may be within tolerance for delivery.
Only the newest generation of vaporizers are altitude compensated. (Except desflurane)
YesTrue. But taking the same Forane vaporizer from New york City to Denver will give a different volume percent delivered.
Only the newest generation of vaporizers are altitude compensated. (Except desflurane)
Most people I know chart what the O2 sensor or gas analyzer says, which in this case would probably be around 90% (H2O vapor, left over nitrogen accounting for the rest).
But yeah, it bugs me too when I take over a case and there's a string of 1s.
If you're writing down 1, or 100%, or just estimating based on your O2 and N2O concentrations only, you might as well not be writing it down at all because it's simply wrong.
you might as well not be writing it down at all
And that's the problem.
FiO2 is a measurement for us, just like SaO2, EtCO2, temp, etc. Every anesthesia setup is required to have at least one, if not more, FiO2 monitors. The number that should be going on your anesthesia record is the number on the monitor. If you're writing down 1, or 100%, or just estimating based on your O2 and N2O concentrations only, you might as well not be writing it down at all because it's simply wrong.
I suspect most people watch the number bounce around between 94 and 97 and just write down 1.0 once an hour. It might be imprecise, but it is hardly wrong.
Atmospheric pressure varies over a 10% range. It's not documented at all.
That's more imprecision than the 100% rounding.
I have found that several of "our" "colleagues" are pretty creative with the old paper record. I like the electronic record much better. It actually reflects what happened. I used to give breaks, take over, etc and wonder if they write what they wanted the VS to be, or just filled out most of the record in advance.Do you also round your BP readings up to numbers that are more pleasing to the eye?