[FRIAM] New information on COVID-19

[Roger Critchlow]

Thank you, Frank, I stand corrected.

-- rec --

On Fri, May 1, 2020 at 10:50 AM Frank Wimberly <wimberly3 at gmail.com> wrote:

> 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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