Comments by "Hello World" (@HelloWorld-ns7gt) on "Oxygen in the blood" video.

  1.  @davidjohn8743  I just ordered one amazon 2 days delivery. woo hoo. I have emphysema.
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  2.  @svenmohamad8646  Rest rate goes up as we age.
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  3.  @Prefabfan-q2q  When i use mine, if I'm sitting quietly and breathing normal the reading is 97-99 but as soon as I start moving it can go as low as mid eighties and starts beeping. I think I'm sick.
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  4. You could be onto something.
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  5. He does appear to be a good man.
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  6. He's not replying at the mo. Just google that question you will get an answer. Good luck.
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