The part about capillaries being kept patent by expansion of alveoli is further contraindicated when we discuss Zone 1 of the lungs where Alveolar pressure>Capillary pressure leading to collapse . I am confused
Does the distension and recruitment primarily drop the PVR by increasing the blood flow, by increasing the cross sectional area (and thus directly drop PVR), or both?
I believe that it increases the resistance because it is inversely related to the radius. Resistance is proportional to 1/ radius to the power of 4. This shows that the resistance is highly sensitive to changes in radius. Best wishes.
Regarding the flow : blood flow is also inversely related to the resistance. It makes sense because increasing the blood flow will increase the velocity of the fluid and in turn decrease the resistance. However, it is not to the power of 4 as in the radius, so I would expect the radius to have a greater effect. Please note that I am not sure of my answers as just thought of them in this way. Regards
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Thank you very much sir.. love and respect from a faraway island called Sri Lanka 🙏🏽
Dude is a machine! Awesome lectures.
Excellent teaching. Very lucky to got this opportunity....
you explain this subject like noo other!!!!!
Your theory about hypoxic pulmonary vasoconstriction is very interesting. Thanks!
correction @ 24:00 should be high blood flow at the base of the lung, not the top of the lung
The part about capillaries being kept patent by expansion of alveoli is further contraindicated when we discuss Zone 1 of the lungs where Alveolar pressure>Capillary pressure leading to collapse . I am confused
Thank you sir from the bottom of my heart...
Great lecture. Thanks!
GREAT CONCEPTS
Does the distension and recruitment primarily drop the PVR by increasing the blood flow, by increasing the cross sectional area (and thus directly drop PVR), or both?
I believe that it increases the resistance because it is inversely related to the radius. Resistance is proportional to 1/ radius to the power of 4. This shows that the resistance is highly sensitive to changes in radius. Best wishes.
Regarding the flow : blood flow is also inversely related to the resistance. It makes sense because increasing the blood flow will increase the velocity of the fluid and in turn decrease the resistance. However, it is not to the power of 4 as in the radius, so I would expect the radius to have a greater effect. Please note that I am not sure of my answers as just thought of them in this way. Regards
mbar128 increasing of the cross sectional area
Ariel Olshevsky or at least thats what Mr West explains in his book..
🙌
i will be the last one who comment in this video
Incorrect. That would be me. You lose!
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