two plus two is four, two plus two is four, two plus two...

ok kids. i have GOT to know this formula by the next thursday. i hereby grant anyone who has my cell phone(s) #'s to call and ask me to recite it to them. if i get it wrong, you can request a song, and if i know it, i'll sing it. ronin - three wrongs and no singing and you can cash in your points for one cappoierra lesson. lotus - two wrongs and i'll make time for one hour's worth of make-up lessons from my sister. totu - five wrongs and i'll watch a scary movie cross-country with you (please, no "saw 2"...)

here goes:

CaO2 = (Hb x SaO2 x 1.34) + (PaO2 x 0.003)

CaO2 is the content of arterial oxygen normal value: >20%
Hb is hemoglobin, measured in g/dL. norm levels: women: 12-14 g/dL men: 14-16 g/dL
SaO2 is proportion of available Hb actually carrying O2. expressed in %. normal : >95%
1.34 is a constant for the amount of mL of O2 each gram of Hb can carry.

these three account for the amount of O2 in the RBC's (red blood cells).

PaO2 is partial pressure of O2 dissolved in t/plasma in t/arteries. normal: 80-100 torrs

0.003 represents the volume % (0.30) of O2 dissolved in t/plasma for an average PO2 of 100 torrs at 37* C.

these two account for the amount of O2 floating around in the plasma.