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DrNickCrombie's profile
Dr Nick Crombie
Dr Nick Crombie
Dr Nick Crombie
@DrNickCrombie

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Dr Nick Crombie

@DrNickCrombie

Trauma Anaesthetist, QE Hospital Birmingham @uhbtrust , PHEM Consultant, RePHILL Chief Investigator, RCPath Medical Examiner, Farmer

All tweets are personal views
Joined March 2012

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    Dr Nick Crombie‏ @DrNickCrombie 13 Jul 2020

    An Anaesthetist explaining how stuff works: a thread..... There has been a lot on Twitter about whether wearing masks reduce your oxygen levels. Some of it, depressingly, from people who should know better: (1)pic.twitter.com/AgACPKLuvB

    8:14 AM - 13 Jul 2020
    • 1,823 Retweets
    • 3,724 Likes
    • Callum Thomas #StayAlert Eileen Firew Odo Laurence O'Bryan The Sulky Jedi ❤️ 🕸 DW Manoj Sally Meseret Isabelle Gough
    136 replies 1,823 retweets 3,724 likes
      1. Dr Nick Crombie‏ @DrNickCrombie 13 Jul 2020

        (2) so let me, with 20 years of living, and managing respiratory physiology, try to explain...... We breath in around 500-600ml of air with an average resting breath. Of this, 21% (roughly 100ml) is oxygen.pic.twitter.com/nCBnR1NjXe

        9 replies 74 retweets 545 likes
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      1. New conversation
      2. Dr Nick Crombie‏ @DrNickCrombie 13 Jul 2020

        (3) Take a restful 12 breaths a minute, and you are breathing in 1200ml of oxygen a minute (that’s 100ml x 12 breaths) . However, all that you breathe isn’t useful. The last 100ml you breathe never gets to the lungs. It’s in your throat and windpipe.pic.twitter.com/oEvSEVQKdV

        5 replies 50 retweets 353 likes
        Show this thread
      3. Dr Nick Crombie‏ @DrNickCrombie 13 Jul 2020

        (4) This “dead space” is gas that is inhaled but never gets to the bits of the lung where it can enter the bloodstream. That means of the 500ml you inhale only 400ml gets into the lungs. And 21% of 400ml is roughly 80ml of oxygen. So 12 breaths still delivers 80x12= 960ml oxy/min

        7 replies 42 retweets 383 likes
        Show this thread
      4. Show replies
      1. New conversation
      2.  😷 Karen  🕷‏ @karenstacey82 13 Jul 2020
        Replying to @DrNickCrombie

        I do hope @zoeharcombe takes the time to read this beautifully written, factually correct, thread. The wonders of respiratory physiology 👌

        1 reply 2 retweets 84 likes
      3. Joanne Evans‏ @OncoloJo 13 Jul 2020
        Replying to @karenstacey82 @DrNickCrombie @zoeharcombe

        May be she aspirated a peanut? 🤷🏻‍♀️

        2 replies 0 retweets 14 likes
      4. Show replies
      1. New conversation
      2. David‏ @PrimaryCarePAC 13 Jul 2020
        Replying to @DrNickCrombie

        David Retweeted David

        I tried it. No problem however many masks plus a walk at noon.https://twitter.com/PrimaryCarePAC/status/1281543585280778240?s=19 …

        David added,

        0:29
        David @PrimaryCarePAC
        I took a walk yesterday with up to 3 surgical masks and a N95. Brought along a pulse oximeter. Here is the end. See the full video at https://www.facebook.com/491462961296151/videos/688234251725017/ … @mackinprof @Sale_ExNut @YoniFreedhoff @edyong209 @tarahaelle @strength4health @Exspec85 pic.twitter.com/tkHfNOx6yZ
        2 replies 16 retweets 106 likes
      3. J D "masks aren't just for IP addresses" Eisenberg‏ @jdeisenberg 13 Jul 2020
        Replying to @PrimaryCarePAC @DrNickCrombie

        I did something similar with three cloth masks.https://youtu.be/T8owCp74frE 

        1 reply 0 retweets 6 likes
      4. Show replies
      1. New conversation
      2. Owain Sutton‏ @OwainAlty 13 Jul 2020
        Replying to @DrNickCrombie

        tl;dr You can confidently ignore anyone that puts *both* "Dr" and "PhD" in their title.

        10 replies 3 retweets 229 likes
      3. piscohof‏ @piscohof 13 Jul 2020
        Replying to @OwainAlty @DrNickCrombie

        Unless they're a medical doctor with an academic PhD in which case DEFINITELY LISTEN

        3 replies 0 retweets 26 likes
      4. Show replies
      1. New conversation
      2. Nigel Davies  🏴󠁧󠁢󠁷󠁬󠁳󠁿 💙 🎵‏ @NigDavT 13 Jul 2020
        Replying to @DrNickCrombie @doctor_oxford

        @@threadreaderapp unroll please

        1 reply 0 retweets 0 likes
      3. Thread Reader App‏ @threadreaderapp 13 Jul 2020
        Replying to @NigDavT

        Guten tag, the unroll you asked for: @DrNickCrombie: An Anaesthetist explaining how stuff works: a thread..... There has been a lot on Twitter about whether… https://threadreaderapp.com/thread/1282694874555392002.html … Enjoy :) 🤖

        0 replies 2 retweets 4 likes
      4. End of conversation

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