100% saturation reading

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100% saturation reading

Postby Kcomplex » Tue May 08, 2012 8:34 pm

young black female pt, bmi 40. wore acrylic nails and colored polish. sats ran at 100% for most of the night. Some mild events were present but with little to no sat change.

I would've expected to see a false lower sat reading due to the combo of fake nails, polish and skin pigmentation, but not a straightline 100% pretty much all night.

any thoughts?
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Postby somnonaut » Tue May 08, 2012 10:51 pm

SHould have placed it on toe.
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Postby Kcomplex » Wed May 09, 2012 2:17 am

that would require a tech motivated enough to try basic troubleshooting, or to at least switch probes or do anything to prove/disprove the reading. *bangs head*

but is there an explanation for artifactual top-outs on pulse oximetry? I'm sure this is not a true reading but can't find an explanation that makes sense.
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Postby somnonaut » Wed May 09, 2012 2:32 am

There was just a thread on oximetry and a few posts there had some links that were good and addressed nails and nailpolish. If I recall, the issue was the fake nails reflect only one of the two wavelengths of light, and this only let through the non-reflected one, and letting this one through ONLY tells the system it is fully saturated.

Or something like that.

Look it up it was in the physiology forum.
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Postby RPSGT88athome » Wed May 09, 2012 11:19 am

pulse ox artifact is most often high not low. If your tech did not suspect an unusually high sat as artifact then you need a new tech.

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Postby Kcomplex » Wed May 09, 2012 1:23 pm

thanks, Claude.

and RPSGT, I agree completely with your point and wish that were my call.
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