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s_r_constantin's profile
Sarah Constantin
Sarah Constantin
Sarah Constantin
@s_r_constantin

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Sarah Constantin

@s_r_constantin

Math/ML/data-science person now working on solving aging...and helping with COVID19?! Founder, LRI and Daphnia Labs. Married to @oscredwin

Be
srconstantin.posthaven.com
Joined February 2019

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    1. Sarah Constantin‏ @s_r_constantin Mar 17
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      PSA: in medical documents, when they use the word "ventilator", they usually mean the kind that requires intubating the patient and has very precise pressure and volume control.

      2 replies 7 retweets 42 likes
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    2. Sarah Constantin‏ @s_r_constantin Mar 17
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      Pressure on an ICU ventilator is measured in units of *tenths of a cm H20* -- that's THOUSANDTHS of psi. Those "DIY ventilator" projects that are basically a bag, a pump, and a mask? They're probably not this precise. (No calibration measurements listed, at any rate.)

      4 replies 2 retweets 18 likes
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      Sarah Constantin‏ @s_r_constantin Mar 17
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      If you want to #buildventilators to help with the COVID19 crisis you're going to have to match the specs on the kind of ventilators used for long-term care of patients with ARDS. Bag ventilators are for emergency first aid and temporary breathing support.

      3:48 PM - 17 Mar 2020
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      • 18 Likes
      • Jason Crawford Jonathan Gall Watson Ladd Arnaud Schenk Daniel Molling Liron Shapira Codex bowser antimule
      3 replies 2 retweets 18 likes
        1. Sarah Constantin‏ @s_r_constantin Mar 17
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          Here's a doctor demonstrating how you use an ambu bag. https://www.youtube.com/watch?v=1goz1l28kUQ … Obviously, the pressure isn't precise here, since he's just squeezing the bag by hand. But I think (?) that's just erring on the side of too little pressure because you're going to escalate anyway.

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        2. tristan‏ @jancorazza Mar 17
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          Replying to @s_r_constantin

          how much precision is required for which outcomes? if push comes to shove, and care is being triaged, this might be one of those "you take what you can get" situations. (speaking from no experience)

          1 reply 0 retweets 2 likes
        3. Sarah Constantin‏ @s_r_constantin Mar 17
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          Replying to @jancorazza

          There's an escalation ladder that's already in place: oxygen masks, then intubation and ventilators if the masks don't work. Undershooting pressure means not enough oxygen, overshooting means ripping the lung.

          1 reply 0 retweets 1 like
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        1. Liron Shapira‏ @liron Mar 17
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          Replying to @s_r_constantin

          #buyventilators

          0 replies 0 retweets 1 like
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