Flashcards in Physics and Chemistry-Solubility of Gases Deck (11)
who's law permits calculation of dissolved O2 and dissolved CO2 in blood?
Henry's law states that the amount of gas that dissolves in a liquid is proportional to the partial pressure of the gas in the gas phase.
just a fact
what is the amount of O2 that dissolves in blood?
how do u calculate the amount of O2 dissolved in blood?
multiply the partial pressure of O2(PaO2) by 0.003.
it's that easy
How much O2 is dissolved in the arterial blood when PaO2 is 300mmHg
300mmHg x 0.003 = 0.9ml O2/100mL blood
How much does dissolved O2 increase in the blood when PaO2 increases from 100mmHg to 500mmHg?
100 x 0.003 = 0.3 mL O2/ 100mL blood
500 x 0.003 = 1.5mL O2/100mL blood
Increase = 1.2 mL O2/100mL blood
If the inspired O2 is given, how do you estimate the PaO2?
Multiply the inspired concentration by 5
How much O2 is disheveled if the FiO2 is 40%
40 x 5 = 200mmHg
200mmHg x 0.003 = 0.6 mLO2/100mL blood
what is the amount of CO2 dissolved in blood?
0.067 mL/ 100mL blood/ mmHg
how do you calculate the amount of CO2 that is dissolved in the blood?
Multiply the partial pressure of CO2 (PaCO2) by 0.067