Yes, there are some great comments there. Here are just a couple that I noticed:-
In my opinion it is far better you spend your time doing these checks than doing yet more meaningless and pointless electrical safety testing…
Standards are often written with the benefit of hindsight available at the time they were written. Standards are the lowest common denominator that we should work to, but not be needlessly restricted by.
But those comments are now six years old. Have Fluke (or anyone else's) SpO2 "analyzers" moved forward to incorporate Lightman
(Geoff Mathews) capabilities ... namely, to test for accuracy?
I believe that "LED wavelength drift" is really to do with temperature.
By the way, the “Medical Equipment Quality Assurance book" cited in one of the comments is still available for download if you use the infamous Wayback Machine
Lastly (although aimed at light sources), Zeiss
does a nice piece on LEDs.