[FRIAM] New information on COVID-19

[Frank Wimberly]

Roger,

It's Coumadin not Heparin that's used as rat poison.  I've taken both.
Thank God, I'm not a rat in that sense.

On Fri, May 1, 2020 at 8:43 AM Roger Critchlow <rec at elf.org> wrote:

> An "In Depth" appears in Science online today,
> https://science.sciencemag.org/content/368/6490/455, titled "The mystery
> of the pandemic's ‘happy hypoxia’".  It mentions the NYTimes OpEd in
> passing.
>
> One suggestion is that the blood is clotting in the lung capillaries,
> which interferes with O2 transport by red blood cells while allowing the
> plain gas transport of CO2 to continue as normal, hence hypoxic but venting
> CO2 normally and not feeling in the least breathless.  24 of 27 hypoxic
> patients treated with heparin (a blood thinner also used as a rat poison)
> recovered well, 2 are still critical, and 1 was transferred to another
> hospital.  That's a good preliminary result.
>
> -- rec --
>
> On Fri, Apr 24, 2020 at 11:40 AM Roger Critchlow <rec at elf.org> wrote:
>
>>
>>
>> On Thu, Apr 23, 2020 at 8:32 PM Roger Critchlow <rec at elf.org> wrote:
>>
>>>
>>> I wonder if any of those cell phone pulsimeters could be upgraded to
>>> oximeters with some calibration?
>>>
>>
>> There are a bunch of cell phone pulse oximeter apps that use the cell
>> phone flash and camera, but I don't get the feeling that they've been
>> calibrated much.  It's a lot easier to write the code, call it
>> entertainment, and reap the ad revenues that to actually determine what the
>> measurement means in the general population.  Some apps have even added
>> some of the other pulse oximeter functions, perfusion, respiratory pleth,
>>  Then, again, https://www.ncbi.nlm.nih.gov/pubmed/2921597 says "Smartphone-based
>> pulse oximetry is not inferior to standard pulse oximetry in pediatric
>> patients without hypoxia. Reliability was superior for PBA compared with
>> CBA, with more precise agreement for the PBA compared with the CBA. Future
>> studies should test pulse oximetry apps in a hypoxic pediatric
>> population."  That was published in 2018.
>>
>> There's an interesting series of press releases from UIUC claiming that
>> measuring someone's gait (with cellphone accelerometers) over a 6 minute
>> walk is enough to get a good estimate of O_2 saturation, because people who
>> aren't getting enough O_2 apparently walk funny.
>>
>> Here's an android app on github,
>> https://github.com/YahyaOdeh/HealthWatcher, with some more method
>> references, the https://github.com/topics/spo2 listing has a bunch of
>> arduino projects, too.
>>
>> -- rec --
>>
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-- 
Frank Wimberly
140 Calle Ojo Feliz
Santa Fe, NM 87505
505 670-9918
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