Alveolar Ventilation perfusion ratio physiology (VQ ratio) V/Q mismatch | Respiratory system

Respiratory physiology lecture on ventilation perfusion ratio.
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[@PhysiologyOpen]

AT 12: 09, I said ventilation is more at apex... here I mean in comparison to perfusion. ACtually ventilation is more at base and less at apex.

[@Vasudeva061]

Wow thank you for the video ma'am... This is one topic where I always forget easily.... and everytime i read it i feels like i understood it but not actually

[@PhysiologyOpen]

Yeah it’s pure concept

[@AnilKumar-fg3ou]

Difficult to understand topic , but you made it easy

[@PhysiologyOpen]

Thank you 😊❤️

[@DaxabenPatel-kt1bd]

Best mam ❤ Hope u cover more topic like this🙏

[@PhysiologyOpen]

Yeah sure

[@anaswarakrish]

Superb session maam .. :)

[@PhysiologyOpen]

Thank you 😊

[@rubanu7066]

Thankyou so much mam❤🙏💕

[@PhysiologyOpen]

Most welcome

[@medicobhowmik]

Mam , does V/Q ratio justify why TB patients more prone to infection of apex of lungs , that's a random question to my mind . Btw thanks for teaching wonderful concept 🫡🫡💯💯

[@PhysiologyOpen]

Yes it justifies…you might have seen in the video how apex alveoli po2 is high due to very less perfusion…TB bacillus is aerobic and so apex is affected much more

[@medicobhowmik]

​@@PhysiologyOpengot it mam!! Thank u mam 😃

[@wycliffenyandika9017]

I like your video ,but ventilation concept is super confusing 🫤,I thought I understood it from the start that it’s more at the base until you introduced the partial pressures of 132 and 89 mmhg then you said the apex has more ventilation

[@PhysiologyOpen]

Apex has more expanded alveoli- but not ventilation

[@PhysiologyOpen]

For ventilation air should move in and out- and not be there stagnant in more expanded alveoli- we want both expansion and recoil of alveoli

[@wycliffenyandika9017]

@@PhysiologyOpen so the stagnation is brought about by lack of perfusion?

[@PhysiologyOpen]

Ventilation is less compared to base of lung. When compared to perfusion at apex, ventilation is more than perfusion…so whatever oxygen is there, it can’t diffuse also into the blood- causing high po2 at apex

[@jayaramsaibaba9076]

Mam if less o2 diffuses in apex of the lung then pAO2 in apex must be more paO2 in apex must be less.How arterial paO2 is more in apex mam?