Alveolar Gas Equation - Alveolar, arterial (A-a gradient) -Oxygen & Carbon Dioxide - Lung Physiology

The Alveolar Gas Equation…PAO2, Atmospheric pressure in atm units (Pb), Pressure of water vapor, Fraction of inspired oxygen (FiO2), Partial pressure of carbon dioxide in the arterial blood (PaCO2), and partial pressure of oxygen in the arterial blood (PaO2).

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[jznxxtt]

OH MY GOD I JUST FINISHED THE VIDEO AND I’M IN LOVE WITH THE POETRY AT THE END 🤣🤣🤣🤣 your channel will be my all time favorite
It's so so unique
Thanks man

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The poetry is absolutely spectacular! In love with all of your videos, thank youuu! <3

[MuhammadKhan-elhf]

You have an amazing sense of humour brother.
Your research and concepts are second to none.
Preparing for my exit exam.

[basmagaber]

Wow 😲😲.thank you..may God keep you safe and priliant

[alaadk.]

Thank you.
It was a real struggle to understand such equation.... Finally, it makes sense

[WhyNot-sipj]

In a nut shell :

PA CO2 = Pa CO2 . Because CO2 readily equilibrates in both alveoli & arterial blood as it has a higher diffusion coefficient than that of oxygen, so there is NO A-a gradient for CO2 !

The PA CO2 is the driving force for the diffusion of PA O2 to the pulmonary circulation across the (alveolar - capillary interface) ; where the metabolic activities of the alveolar pneumocytes & capillary endothelium determine the respiratory quotient (RQ) for O2 extraction from the PA O2 .


Normal A-a gradient = 5 - 15 mm Hg .

[maheenshahzad]

i was tired from studying all day but your lecture helped me push forward to understand this topic as well! thankss

[aleksanna]

thanks!! now it's so easy, but didn't seem so at all

[madelyncompilation]

"People do not like EQUATION, they would rather listen to JUSTIN BIEBER" 😅😅
This is hilarious, being here a big fan of JB n also a med student!😀
Thanks a trillion MEDICOSIS, medicine bcm so much fun now 🤗

[lawrenceyelkin]

bro, all of the questions i freaking had, you answered, every one of these steps where theres an underlying assumption, you answered, FINALLYYY, except i need some more physics with how CO2 and O2 affect each other in the alveolus, like i guess theyre enemies makes sense, but raelistically, how does the physics add up. do we just reject any extra O2 bc theres a certain amount already present. idk maan but thanky ou

[bijay_]

Sir earlier during A-a gradient lecture, you said there was no A-a gradient because PACO² and PaCO² are same, but here it's PACO² > PaCO² . How😵

[jznxxtt]

6:26 “ okay shut up” got me laugh so hard 🤣😭

[sahilkhatri]

I think Pco2 in atmosphere would be 0.2852 mm hg not 28.52 mm hg.
Cause 0.04%=0.0004 and ×713 = 0.2852 mm hg
Same with pAco2 5.6%=0.056 × 713 =39.98 mm hg

[jaydeepchauhan]

at 4 atm pressure & 80% concentration. what is the amount of o2 dissolve ?
a-4ml
b-4.4ml
c-4.8ml
d-5.2ml

[MeOKMeO]

Serious concept flaw that I have to point out (I was quite enjoy reading your series s sincerely)

CO2 is freely diffuse into alveoli and assumbly no A-a gradient of CO2, and this concept get through alot resp physio, if u explain the derive of this equation for having A-a PCO2 difference it is completely wrong, pls consider make big ammendment.

[smsmsa]

Perfect video!!! And a great explanation. Thank you so much.

[payalnayak]

17:43 Why did you decrease the PaCO2 from 40 to 36?I couldn't understand that point?

[jorgeramirez]

Hello, at 10:24 when you are explaining the math behind PiCO2, the amount of CO2 in the air is in percentage, so i dont know if the math is actually right or maybe i misunderstood, anyways thanks for the help with the lecture, luv ur vids :)