Ventilation/ Perfusion Ratio (V/Q) and V/Q Mismatch - Respiratory Physiology & Pulmonology
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- Опубликовано: 26 сен 2024
- Ventilation-Perfusion Ratio (V/Q ratio) and ventilation-perfusion mismatch…Dead-space physiology vs Pulmonary Shunting physiology…Intrapulmonary shunt vs intracardiac shunt.
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This statement ‘medicine makes perfect sense IF explained properly’ is so underrated tbh
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Dear you are the common sense doctor I like and I wish I would know you more and share a lot.You said." medicine makes sense when you explain ." I liked you so much I like reading Guyton,medical physiology text book for it really make you sensible doctor.I call a bit out of fashion for I despise these question and answer type of study purly directed at passing an exam,I know some times it hurts but honestly medicine is so great that way.Thank you for your superflowing explanation with ease.
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Your explanation is amazing and simultaneously funny! After that i will remember v/q mismatch for a decade!
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I have a question in 19:14 isn't that supposed to be BRONCOconstriction instead of VASOconstriction???
As you explain in the next sentence, the purpose is to narrow the BRONCHUS (not the VESSEL), when hypoperfussion takes place...
Or am I wrong??? I dont know, thats why I ask my savior!
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Can you provide a few references for this information? Not saying your incorrect but would help me tremendously for my essay
See Guyton’s, Ganong’s and Boron’s Physiology textbooks. They have a lot of citations.
Hi, hello my dear friend medicosis perfectionalis, simply u are just awesome. Nothing to say more. Thanks for ur sharing knowledge.
You’re very welcome 😊
my professor asked the exact same question: "Is it worse to have high V/Q or low V/Q?" I know both are bad, but which one is worse if you had to choose one?
hello dr. I hope you do answer questions here. I am having a bit of a problem in understanding why in obstructive lung diseases there is decreased ventilation. I know that it is very intuitive to understand why but I clearly recall that the problem in obstructive lung diseases was in expiration not in inspiration. Perhaps it is wrong to associate inspiration and ventilation together but for some reason I am associating them.
Very easy to understand. Thanks a lot.
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Superb explanation
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5:34 there is maybe a mistake. Part where “normal apex”. If I’m not right, explain pls
Yes, you are right. At the apex of the lung both perfusion (Q) and ventilation (V) are decreased, but the decrease in Q exceeds the decrease in V, making the V/Q ratio relatively high. Otherwise, it is really a perfect video.
i have a question; i always see the equation written like this: Co2 + H2O H2co3 Hco3 + H ... y does it say co2 + water if CA is removing the water to form carbonic acid?
another question; in decreased ventilation shouldn't the PaCO2 go up? or is normal because its corrected by increased respiratory rate?
It's a humble request pls make some videos on immunology as well... Please... Thank you
Ok 👍
What happens to alveolar ventillation in theses cases
1- testrictive lung disease
2 -obstructive lung disease
3- airway collapse
4 increasing compliance
?!!
Can you give me the answer as Unfortunately I cannot answer that
Hi thankyou❤
Lower lobe infarction common due to more diffusion or more purfusion
In your notes written diffusion while in your video speaking perfusion? Please explain
11:35 F
The V/Q mismatch will always be mismatched, the closest that we will be to attaining 100% is in the middle of the lung? @ the apex we will have a higher ratio, and @ the base a lower, ratio? So when does this become a problem if it is always mismatched?
Emphysema has low V/Q right? Damaged Alveoli causes loss in ventilation with same perfusion which will result in low V/Q.
Excellent
Hi medicosis! i had a question about 10:48 when you mentioned emphysema leads to decreased V/Q ratio. What you say makes sense; however, everywhere online Ive seen that emphysema is an example of increased V/Q mismatch. Currently watching Dr. John B. West's resp phys lectures and he states that emphysema leads to higher V/Q inequality due to some ventilation but little perfusion in the destroyed lung tissue. Again, id like to say that both your reasoning and his makes sense to me, so its a bit difficult to piece things together lmao. Love your videos man, hope you can help!
-a young M1
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3:25 - I think there is an error in "in the base" line. Shouldn't it be: "increased V, but Q increased even more"?
Yeah thought same
Same with you, he confused us also at 9:29 , there he said there is increased ventilation in apex. Should be decreased ventilation in apex
Great explanation ❤️
Thanks 😊
Why does Wikipedia say emphysema is high vq
How to get these video form pateron these videos are free ?
Jackson Timothy Garcia Sarah Gonzalez Christopher
awesome!
Thank you!
can ventilation defect cause hypercapnia? less o2 is in the alveoli so i thought Paco2 would be higher
Hypoventilation can cause hypercapnia.
Also, hyperoxia can cause hypercapnia.
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15:28 why is it 40? Can't it be any number less than 105?
10:46 shouldnt emphysema have a high v q ratio ??
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Dead space for fools 🤦♂️
???
He talk a lot, at last can't remember anything 😢😢
At 4:22, you said there is decreased Ventilation in apex;
At 9:29, you said there is more ventilation in apex.
Which statement is correct?
The apex has less ventilation than the base. However, the apex has a higher ventilation-to-perfusion ratio than the base.
Thanks for clarification
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Thank you so much for the great explanation. You're the best!!!
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Hi sir, Hope you can answer me back!, if we have dead space, so no gas exchange, why pO2 is nearly 100 mmHg like normal situation? I was expecting like "shunting".
Please add refrences and further reading if possible .. thanks🔥
Fav physio channel
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thanks for that perfect video
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When the vessel is closed, close the bronchus...
Does that happen? There is bronchoconstriction?
I am sorry, I don’t understand your question
@@MedicosisPerfectionalis The last statement of the video
Decreased perfusion. Does it cause closing of bronchus?
thanks for ur effort,but in obstructive lung disease with low v/q ratio,i think u should have hypercapnea not normocapnea,what do u think?
Give me an example.
@@MedicosisPerfectionalis Thanks for answering me,i mean all type 2 respiratory faliure is hypoxic hypercapnic or at least thats how they teach us.
@@MedicosisPerfectionalis In COPD problem is in expiration so CO2 is retained leading to hypercapnia
Extraordinary.. full content thoroughly touched with clear explanation…
Thanks a ton!