- Jan 21, 2004
most of them can be linked live to a PC. even the really old ones usually have a serial port that can stream the data to a telnet session
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The problem is that when the value on a fingertip oximeter starts to fall, it does not indicate falling O2 saturation in your body. It only indicates vasoconstriction, and that tells absolutely nothing about your real O2 saturation. So yes, to some degree it is useful, because it shows you when the diving response really kicks in, but it is useless for diagnosing your O2 saturation.It seems like the fingertip oxies are not popular here.
I find them very useful for checking when OXY starts to fall and how fast it falls.
Seem to be fairly accurate down to 70% (depending price).
Vaso does not seem to be an issue for me.
There is no magical separation between core blood and extremity blood as long as there is still blood flow.
That's exactly where the fingertip oximeter can seriously mislead you. If you use breath-up that suppresses the DR (more hyperventilation) the SaO2 values will appear good to you (since there is little vasoconstriction), but in reality the core may be already in dangerous level of hypoxemia.Recently I made a change in breathe up and got an immediate difference at the 6:00 point, consistently about 5% better. For me that is an extra 30-45 seconds on a 7:00 hold. now I am getting better saturations at 6:30 than I used to get at 6:00.