Masimo masimo mighty Masimo MightySat Fingertip Pulse Oxim

I have central hypo-ventillation syndrome (ondine's curse) and bought this because I wanted something extremely accurate and medical grade. I already have a Contech CMS 50F and it is very good, but I didn't feel comfortable wearing it at work. I was also concerned the Contech had some movement artifact and that's why I needed something more accurate as my condition is extremely rare and the medical community wasn't taking me seriously. I wore my contech during my in-lab sleep study in Feb. While awake facebooking, the contech had me desatting to 87% and the lab had 85%. While asleep, the contech had me desatting to 75% and the lab recorded 74%. So the Contech is accurate to 1% - 2%. So I was able to have the sleep lab had to amend their report to confirm central apneas and desatting while awake. While at work on 26 April, wearing both the Massimo and the Contech, and working on the computer, I was desatting and fainting. The Contech recorded 85% and the Masimo was only reaching down to 92%-93%. I know you have to go below 88% to faint, so that's how I know the Masimo is inaccurate and the contech is providing numbers within range. I found the Masimo runs about 3% too high with little ups and downs. When I experience central apneas whether asleep or awake, my O2 sat goes up and down like a yo-yo and varies by 10%-12% in about 1 min cycles, also confirmed by the lab. The masimo levels would only vary by 2%-3%, yet it would show my breathing rate vary from 5 to 25 breaths per minute. As you can see in the attached photos, my breathing rate in the white graph varies widely, yet the graph of my O2 saturation hardly varies. Also, the data will not export after multiple tries. So the reporting capability doesn't work as advertised either.