Alveolar-Arterial Gradient | (A-a) Gradient | Respiratory Physiology & Pathology..Pulmonary Medicine

The A-a gradient…Alveolar-arterial gradient is the difference between the partial pressure of oxygen in the alveoli (PAO2) and the partial pressure of the oxygen gas in the arterial blood (PaO2)…This A-a gradient can help differentiate between intrinsic restrictive lung disease and extrinsic restrictive lung disease.
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Пікірлер: 82

  • @MedicosisPerfectionalis
    @MedicosisPerfectionalis2 жыл бұрын

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    @angelamartin4329 Жыл бұрын

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  • @MedicosisPerfectionalis

    @MedicosisPerfectionalis

    Жыл бұрын

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    @anumrizwan56344 жыл бұрын

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    @tocilizumab5661 Жыл бұрын

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    @ramlaessa9756

    Жыл бұрын

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    @tocilizumab5661

    Жыл бұрын

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    @jenniferevangeline6532 жыл бұрын

    thank you sir. not only have you taught this topic well, you've also taught me the art of sass.

  • @MedicosisPerfectionalis

    @MedicosisPerfectionalis

    2 жыл бұрын

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    @mhussain4384 жыл бұрын

    Your way of making things easier is great.

  • @MedicosisPerfectionalis

    @MedicosisPerfectionalis

    4 жыл бұрын

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  • @OkanVKILIC
    @OkanVKILIC3 жыл бұрын

    Thanks a lot! you always create good stuff. Keep up the good work!

  • @MedicosisPerfectionalis

    @MedicosisPerfectionalis

    3 жыл бұрын

    Thank you so much 😊

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    @lilmamasofly91112 жыл бұрын

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    @tamammohammed48243 жыл бұрын

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  • @MedicosisPerfectionalis

    @MedicosisPerfectionalis

    3 жыл бұрын

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  • @rafezoubi9558
    @rafezoubi95584 жыл бұрын

    Hi, thanks a lot for your videos! Where can we find the answers to the questions to put at the end?

  • @brandonfarler1156
    @brandonfarler11564 жыл бұрын

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  • @MedicosisPerfectionalis

    @MedicosisPerfectionalis

    4 жыл бұрын

    Thank you so much 😊 for watching!

  • @chaosawaits
    @chaosawaits3 жыл бұрын

    15:20 when he says answers are in the next video, what video? I looked in "Ventillation/Perfusion Ration" and didn't see anything

  • @Squiderrant
    @Squiderrant3 жыл бұрын

    The sass in this is real ... and hilarious

  • @MedicosisPerfectionalis

    @MedicosisPerfectionalis

    3 жыл бұрын

    Haha 😂

  • @MedSurvival
    @MedSurvival4 жыл бұрын

    Thank you for making it easier.

  • @MedicosisPerfectionalis

    @MedicosisPerfectionalis

    4 жыл бұрын

    My pleasure 😇

  • @tariqmasri-zada9027
    @tariqmasri-zada90273 ай бұрын

    yea man good stuff it makes sense and its funny

  • @YourIMGguru
    @YourIMGguru Жыл бұрын

    thank you for the video but I can't find the answers to the questions in final section, they were not in your next video.

  • @Rebexterrific
    @Rebexterrific2 жыл бұрын

    Love this but I wish I could slow play you 😊

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    @ngkaijian65454 жыл бұрын

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    @ralph60222 жыл бұрын

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    @juliusmamra9051 Жыл бұрын

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  • @MedicosisPerfectionalis

    @MedicosisPerfectionalis

    Жыл бұрын

    Thank you 🙏

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    @TopRapter Жыл бұрын

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  • @MedicosisPerfectionalis

    @MedicosisPerfectionalis

    Жыл бұрын

    :)

  • @sinclair657
    @sinclair657 Жыл бұрын

    Thank you

  • @MedicosisPerfectionalis

    @MedicosisPerfectionalis

    Жыл бұрын

    I appreciate you!

  • @nishatpatel9821
    @nishatpatel98214 жыл бұрын

    Nice video.

  • @MedicosisPerfectionalis

    @MedicosisPerfectionalis

    4 жыл бұрын

    Thanks 😊

  • @azharalam3529
    @azharalam35294 жыл бұрын

    Love lot

  • @MedicosisPerfectionalis

    @MedicosisPerfectionalis

    4 жыл бұрын

    👍👍

  • @Doctorpulmonologistfcps5677
    @Doctorpulmonologistfcps56773 жыл бұрын

    Kindly give referneces of this charts ? Books?

  • @raspberry765
    @raspberry7654 жыл бұрын

    Thank you for the video! In class, we were told that raising oxygen fraction increases the A-a gradient. Would you be able to explain that please?

  • @MedicosisPerfectionalis

    @MedicosisPerfectionalis

    4 жыл бұрын

    Can you give me an example?

  • @AcousticInterpretare

    @AcousticInterpretare

    4 жыл бұрын

    ​@@MedicosisPerfectionalis This might be due to diffusion limitation along the alveolar capillaries.

  • @tijanitunkara2553

    @tijanitunkara2553

    4 жыл бұрын

    Yess that is only true when you have high VQ mismatch or even shunting.. Due to diffusion problem.. That’s why it’s more important to give high PEEP than fio2.. when their a shunting, increasing FIO2 will only increase PAO2 but little or no effect on PaO2 causing your A-a griedient to be in the 30’s

  • @dk_doc
    @dk_doc3 жыл бұрын

    Please solve my doubt We say that in case of vq defect the aa gradient increase But how does that occur in case of ventilation block I mean when ventilation is zero, there is no air reaching the alveoli for getting exchanged with the blood so the arterial blood po2 (i.e “a” of the Aa gradient drop) But if the ventilation is zero, then there is no air reaching the alveoli and then shouldn’t also the alveoli po2 (i.e “A” of Aa gradient also decrease as there is no incoming oxygen)? And if both A and a are decreasing, then how come (A-a) is increasing

  • @kontiwi
    @kontiwi4 жыл бұрын

    Hi! Thanks for the video where can i find the answer?

  • @MedicosisPerfectionalis

    @MedicosisPerfectionalis

    4 жыл бұрын

    In the next video in the Pulmonology playlist

  • @foodiesworldUSA
    @foodiesworldUSA Жыл бұрын

    Can someone please post the next video link ty

  • @foodiesworldUSA

    @foodiesworldUSA

    Жыл бұрын

    @medicosis perfectionalis

  • @MedicosisPerfectionalis

    @MedicosisPerfectionalis

    Жыл бұрын

    They are presented in order in the pulmonology playlist.

  • @journal6361
    @journal6361 Жыл бұрын

    i thought P Aco2=P aco2..? How can P Aco2 equal Paco2/0.8 in this equation???

  • @shahrukhkhan-dv8vt
    @shahrukhkhan-dv8vt2 жыл бұрын

    are you the god of medicine😅😅😅😅😅😅😅

  • @MedicosisPerfectionalis

    @MedicosisPerfectionalis

    2 жыл бұрын

    Thank you ☺️

  • @stillfindingmyself6869
    @stillfindingmyself6869 Жыл бұрын

    What will happen to the gradient in emphysema

  • @MedicosisPerfectionalis

    @MedicosisPerfectionalis

    Жыл бұрын

    Widened A-a gradient.

  • @kristimeredith5158
    @kristimeredith51584 жыл бұрын

    "Here's another stupid formula" LOL Love this video!

  • @MedicosisPerfectionalis

    @MedicosisPerfectionalis

    4 жыл бұрын

    Thank you so much ☺️

  • @user-jj1nm4sx6w
    @user-jj1nm4sx6w Жыл бұрын

    i didnt understand anything you said

  • @xoxo2971
    @xoxo29714 жыл бұрын

    on Monday💔 i have exam about this subject online can you do this examInstead of me?😔😔 Thanks👍

  • @MedicosisPerfectionalis

    @MedicosisPerfectionalis

    4 жыл бұрын

    Sure! But, how? 🤪

  • @xoxo2971

    @xoxo2971

    4 жыл бұрын

    @@MedicosisPerfectionalis I gave my email and password on classroom and do it😔😭

  • @MedicosisPerfectionalis

    @MedicosisPerfectionalis

    4 жыл бұрын

    You can do it, my friend! Don't be afraid!

  • @xoxo2971

    @xoxo2971

    4 жыл бұрын

    @@MedicosisPerfectionalis i study on my lectures and watched your beautiful videos for you ,so i feel l can do it..thank you very much doctor🥀💡

  • @MedicosisPerfectionalis

    @MedicosisPerfectionalis

    4 жыл бұрын

    You’re welcome 😇 Good luck 🍀

  • @littlegiant101
    @littlegiant1014 жыл бұрын

    The 2 formular for A-a gradient don't match up.

  • @MedicosisPerfectionalis

    @MedicosisPerfectionalis

    4 жыл бұрын

    What do you mean?

  • @littlegiant101

    @littlegiant101

    4 жыл бұрын

    Medicosis Perfectionalis when I used 0.3 x age and when I use age/4+4 it’s different results. Eg. Assuming pt is 22, using 0.3 x 22=7.3, but when I do 22/4+4 it turns out to be 9.5.

  • @MedicosisPerfectionalis

    @MedicosisPerfectionalis

    4 жыл бұрын

    They are not supposed to match exactly.

  • @tijanitunkara2553

    @tijanitunkara2553

    4 жыл бұрын

    Go with the agex0.3 that’s what everyone uses

  • @omerozgurcelik907
    @omerozgurcelik9073 жыл бұрын

    Dude you should be a comedian.:)

  • @MedicosisPerfectionalis

    @MedicosisPerfectionalis

    3 жыл бұрын

    Haha 😂 Thank you so much 😊

  • @kanhmap5531
    @kanhmap55314 жыл бұрын

    is an increased dead space also a kind of V/Q mismatch? Also ARDS? But they don’t response to 100% oxygen // what does it mean by V/Q mismatch response to 100% oxygen? Thank you in advance

  • @MedicosisPerfectionalis

    @MedicosisPerfectionalis

    4 жыл бұрын

    Watch my video on hypoxia.

  • @tijanitunkara2553

    @tijanitunkara2553

    4 жыл бұрын

    Usually VQ mismatch responses to O2.. when VQ mismatch is extremely low is call Dead space which doesn’t respond to oxygen unless you resolve the perfusion (obstruction) problem.. when VQ mismatch is severely high, it call Shunting and shunting doesn’t respond to oxygen either. So that’s why we use high PEEP to help with that.. I hope this help.. I wish I could explain it better but I’m only an ICU nurse

  • @gegeeh.a8328

    @gegeeh.a8328

    3 жыл бұрын

    @@tijanitunkara2553 Zero VQ is shunting

  • @susanjuarez4311
    @susanjuarez4311 Жыл бұрын

    Lmao I love this video

  • @MedicosisPerfectionalis

    @MedicosisPerfectionalis

    Жыл бұрын

    Thank you 😊

  • @chaosawaits
    @chaosawaits3 жыл бұрын

    lol this guy is kind of a jerk but I love it

  • @MedicosisPerfectionalis

    @MedicosisPerfectionalis

    3 жыл бұрын

    Hehe 😜

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  • @Nonajuman
    @Nonajuman2 жыл бұрын

    You talk too fast .. sry its bad

  • @zainab-jg9vl

    @zainab-jg9vl

    Жыл бұрын

    You can make it slow):