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    <p>Excellent idea.  After reading the article Merle linked, I
      ordered one myself.  <br>
    </p>
    <p>I also found that rumor has it that an oximeter will be built
      into the next Apple watch and the next Watch OS.  There is also a
      possibility that the software will work with existing Apple
      watches.  <br>
    </p>
    <p>I just made a suggestion to Apple that IF the latter is true,
      they might consider releasing that part of their software as an
      app now.  I.e., not wait until September.  That would be an easy
      way to get something helpful out now, rather than injecting
      disinfectant as our esteemed leader has suggested as a cure.  <br>
    </p>
    <p>Joe<br>
    </p>
    <div class="moz-cite-prefix">On 4/24/20 10:08 AM, Edward Angel
      wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:CE68DD2A-2E66-4D4F-ABDE-6EF25F443963@cs.unm.edu">
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      The point is that if you check your blood oxygen level you might
      catch the problem before it is so bad that you have to be put on a
      ventilator and probably won’t survive.
      <div class=""><br class="">
      </div>
      <div class="">Ed<br class="">
        <div class="">
          <span class="Apple-style-span" style="border-collapse:
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            0px; "><span class="Apple-style-span"
              style="border-collapse: separate; color: rgb(0, 0, 0);
              font-family: Helvetica; font-style: normal; font-variant:
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              <div class="">_______________________</div>
              <div class=""><br class="Apple-interchange-newline">
                Ed Angel<br class="">
                <br class="">
              </div>
              <div class="">Founding Director, Art, Research, Technology
                and Science Laboratory (ARTS Lab)<br class="">
                Professor Emeritus of Computer Science, University of
                New Mexico<br class="">
                <br class="">
                1017 Sierra Pinon</div>
              <div class="">Santa Fe, NM 87501<br class="">
                505-984-0136 (home)<span class="Apple-tab-span" style="white-space: pre; ">           </span> <span class="Apple-tab-span" style="white-space: pre; ">       </span><a
                  href="mailto:angel@cs.unm.edu" class=""
                  moz-do-not-send="true">angel@cs.unm.edu</a></div>
              <div class="">505-453-4944 (cell) <span class="Apple-tab-span" style="white-space: pre; ">     </span><span class="Apple-tab-span" style="white-space: pre; ">                 </span><a
                  href="http://www.cs.unm.edu/~angel" class=""
                  moz-do-not-send="true">http://www.cs.unm.edu/~angel</a><br
                  class="">
              </div>
            </span></span>
        </div>
        <div><br class="">
          <blockquote type="cite" class="">
            <div class="">On Apr 24, 2020, at 9:46 AM, <<a
                href="mailto:thompnickson2@gmail.com" class=""
                moz-do-not-send="true">thompnickson2@gmail.com</a>>
              <<a href="mailto:thompnickson2@gmail.com" class=""
                moz-do-not-send="true">thompnickson2@gmail.com</a>>
              wrote:</div>
            <br class="Apple-interchange-newline">
            <div class="">
              <div class="WordSection1" style="page: WordSection1;
                caret-color: rgb(0, 0, 0); font-family: Helvetica;
                font-size: 14px; font-style: normal; font-variant-caps:
                normal; font-weight: normal; letter-spacing: normal;
                text-align: start; text-indent: 0px; text-transform:
                none; white-space: normal; word-spacing: 0px;
                -webkit-text-stroke-width: 0px; text-decoration: none;">
                <div style="margin: 0in 0in 0.0001pt; font-size: 11pt;
                  font-family: Calibri, sans-serif;" class="">Remind me,
                  someone.  Why are we all buying oximeters?  I thought
                  the burden of the Times article was that IF you are
                  sick from a “cold”, don’t wait to test your O2 levels
                  until you EXPERIENCE difficulty breathing, because by
                  then it might be too late.  Do you all have colds?   I
                  suppose, given that it takes Amazon six weeks to get
                  one, you are wise to get a jump on it.<span
                    class="Apple-converted-space"> </span><o:p class=""></o:p></div>
                <div style="margin: 0in 0in 0.0001pt; font-size: 11pt;
                  font-family: Calibri, sans-serif;" class=""><o:p
                    class=""> </o:p></div>
                <div style="margin: 0in 0in 0.0001pt; font-size: 11pt;
                  font-family: Calibri, sans-serif;" class="">Nick<span
                    class="Apple-converted-space"> </span><o:p class=""></o:p></div>
                <div style="margin: 0in 0in 0.0001pt; font-size: 11pt;
                  font-family: Calibri, sans-serif;" class=""><o:p
                    class=""> </o:p></div>
                <div style="margin: 0in 0in 0.0001pt; font-size: 11pt;
                  font-family: Calibri, sans-serif;" class="">Nicholas
                  Thompson<o:p class=""></o:p></div>
                <div style="margin: 0in 0in 0.0001pt; font-size: 11pt;
                  font-family: Calibri, sans-serif;" class="">Emeritus
                  Professor of Ethology and Psychology<o:p class=""></o:p></div>
                <div style="margin: 0in 0in 0.0001pt; font-size: 11pt;
                  font-family: Calibri, sans-serif;" class="">Clark
                  University<o:p class=""></o:p></div>
                <div style="margin: 0in 0in 0.0001pt; font-size: 11pt;
                  font-family: Calibri, sans-serif;" class=""><a
                    href="mailto:ThompNickSon2@gmail.com" style="color:
                    blue; text-decoration: underline;" class=""
                    moz-do-not-send="true"><span style="color: rgb(5,
                      99, 193);" class="">ThompNickSon2@gmail.com</span></a><o:p
                    class=""></o:p></div>
                <div style="margin: 0in 0in 0.0001pt; font-size: 11pt;
                  font-family: Calibri, sans-serif;" class=""><a
                    href="https://wordpress.clarku.edu/nthompson/"
                    style="color: blue; text-decoration: underline;"
                    class="" moz-do-not-send="true"><span style="color:
                      rgb(5, 99, 193);" class="">https://wordpress.clarku.edu/nthompson/</span></a><o:p
                    class=""></o:p></div>
                <div style="margin: 0in 0in 0.0001pt; font-size: 11pt;
                  font-family: Calibri, sans-serif;" class=""><o:p
                    class=""></o:p></div>
                <div style="margin: 0in 0in 0.0001pt; font-size: 11pt;
                  font-family: Calibri, sans-serif;" class=""><o:p
                    class=""> </o:p></div>
                <div style="margin: 0in 0in 0.0001pt; font-size: 11pt;
                  font-family: Calibri, sans-serif;" class=""><o:p
                    class=""> </o:p></div>
                <div style="border-style: solid none none;
                  border-top-width: 1pt; border-top-color: rgb(225, 225,
                  225); padding: 3pt 0in 0in;" class="">
                  <div style="margin: 0in 0in 0.0001pt; font-size: 11pt;
                    font-family: Calibri, sans-serif;" class=""><b
                      class="">From:</b><span
                      class="Apple-converted-space"> </span>Friam <<a
                      href="mailto:friam-bounces@redfish.com"
                      style="color: blue; text-decoration: underline;"
                      class="" moz-do-not-send="true">friam-bounces@redfish.com</a>><span
                      class="Apple-converted-space"> </span><b class="">On
                      Behalf Of<span class="Apple-converted-space"> </span></b>Roger
                    Critchlow<br class="">
                    <b class="">Sent:</b><span
                      class="Apple-converted-space"> </span>Friday,
                    April 24, 2020 9:40 AM<br class="">
                    <b class="">To:</b><span
                      class="Apple-converted-space"> </span>The Friday
                    Morning Applied Complexity Coffee Group <<a
                      href="mailto:friam@redfish.com" style="color:
                      blue; text-decoration: underline;" class=""
                      moz-do-not-send="true">friam@redfish.com</a>><br
                      class="">
                    <b class="">Subject:</b><span
                      class="Apple-converted-space"> </span>Re: [FRIAM]
                    New information on COVID-19<o:p class=""></o:p></div>
                </div>
                <div style="margin: 0in 0in 0.0001pt; font-size: 11pt;
                  font-family: Calibri, sans-serif;" class=""><o:p
                    class=""> </o:p></div>
                <div class="">
                  <div class="">
                    <div style="margin: 0in 0in 0.0001pt; font-size:
                      11pt; font-family: Calibri, sans-serif;" class=""><o:p
                        class=""> </o:p></div>
                  </div>
                  <div style="margin: 0in 0in 0.0001pt; font-size: 11pt;
                    font-family: Calibri, sans-serif;" class=""><o:p
                      class=""> </o:p></div>
                  <div class="">
                    <div class="">
                      <div style="margin: 0in 0in 0.0001pt; font-size:
                        11pt; font-family: Calibri, sans-serif;"
                        class="">On Thu, Apr 23, 2020 at 8:32 PM Roger
                        Critchlow <<a href="mailto:rec@elf.org"
                          style="color: blue; text-decoration:
                          underline;" class="" moz-do-not-send="true">rec@elf.org</a>>
                        wrote:<o:p class=""></o:p></div>
                    </div>
                    <blockquote style="border-style: none none none
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                      rgb(204, 204, 204); padding: 0in 0in 0in 6pt;
                      margin-left: 4.8pt; margin-right: 0in;" class=""
                      type="cite">
                      <div class="">
                        <div class="">
                          <div style="margin: 0in 0in 0.0001pt;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class=""><o:p class=""> </o:p></div>
                        </div>
                        <div class="">
                          <div style="margin: 0in 0in 0.0001pt;
                            font-size: 11pt; font-family: Calibri,
                            sans-serif;" class="">I wonder if any of
                            those cell phone pulsimeters could be
                            upgraded to oximeters with some calibration?<o:p
                              class=""></o:p></div>
                        </div>
                      </div>
                    </blockquote>
                    <div class="">
                      <div style="margin: 0in 0in 0.0001pt; font-size:
                        11pt; font-family: Calibri, sans-serif;"
                        class=""><o:p class=""> </o:p></div>
                    </div>
                    <div class="">
                      <div style="margin: 0in 0in 0.0001pt; font-size:
                        11pt; font-family: Calibri, sans-serif;"
                        class="">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, <a
                          href="https://www.ncbi.nlm.nih.gov/pubmed/2921597"
                          style="color: blue; text-decoration:
                          underline;" class="" moz-do-not-send="true">https://www.ncbi.nlm.nih.gov/pubmed/2921597</a> says
                        "<span style="font-size: 10pt; font-family:
                          Arial, sans-serif;" class="">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.</span><o:p class=""></o:p></div>
                    </div>
                    <div class="">
                      <div style="margin: 0in 0in 0.0001pt; font-size:
                        11pt; font-family: Calibri, sans-serif;"
                        class=""><o:p class=""> </o:p></div>
                    </div>
                    <div class="">
                      <div style="margin: 0in 0in 0.0001pt; font-size:
                        11pt; font-family: Calibri, sans-serif;"
                        class="">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.<o:p
                          class=""></o:p></div>
                    </div>
                    <div class="">
                      <div style="margin: 0in 0in 0.0001pt; font-size:
                        11pt; font-family: Calibri, sans-serif;"
                        class=""><o:p class=""> </o:p></div>
                    </div>
                    <div class="">
                      <div style="margin: 0in 0in 0.0001pt; font-size:
                        11pt; font-family: Calibri, sans-serif;"
                        class="">Here's an android app on github, <a
                          href="https://github.com/YahyaOdeh/HealthWatcher"
                          style="color: blue; text-decoration:
                          underline;" class="" moz-do-not-send="true">https://github.com/YahyaOdeh/HealthWatcher</a>,
                        with some more method references, the <a
                          href="https://github.com/topics/spo2"
                          style="color: blue; text-decoration:
                          underline;" class="" moz-do-not-send="true">https://github.com/topics/spo2</a> listing
                        has a bunch of arduino projects, too.<o:p
                          class=""></o:p></div>
                    </div>
                    <div class="">
                      <div style="margin: 0in 0in 0.0001pt; font-size:
                        11pt; font-family: Calibri, sans-serif;"
                        class=""><o:p class=""> </o:p></div>
                    </div>
                    <div class="">
                      <div style="margin: 0in 0in 0.0001pt; font-size:
                        11pt; font-family: Calibri, sans-serif;"
                        class="">-- rec --<o:p class=""></o:p></div>
                    </div>
                  </div>
                </div>
              </div>
              <span style="caret-color: rgb(0, 0, 0); font-family:
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    <pre class="moz-signature" cols="72">-- 
Joe

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