Oxygen was first used as a
remedy for illness in 1783 in
France by Chaussier. In
December of 1907, it was
used in surgery on a woman
who had tremendous internal
damage. It was administered
directly into the abdomen
and marked recovery was
HB 6 GR
HB 13 GR
CaO2 = (SAT x Hb x 1 . 3 4 ) + .0 0 3(PaO2)
PaO2 / FiO2 Ratio or "P/F” Ratio
Another much friendlier method
( because it doesn't use the alveolar gas
equation) used to predict shunt.
Just like the name says, PaO2 is divided by
Normal is 286; lower indicates a shunt.
CLINICAL D. OF HYPOXIA
DISPRAP. BRADY / TACHY .
ALTERED SENSORIUM / SEI.
NON REBREATH. M.
Non-Rebreather masks achieve close to
100% oxygen by minimizing room air
entrainment and by attaching a
reservoir bag filled with 100% oxygen.
The reservoir bag has a flap valve to
block exhaled gas from entering.
Exhaled gas is directed out the side
ports with flap valves to block air
entrainment on inspiration.