Sleep study

[Mahen56]

   I wear TAP 3 appliance. Did a sleep study with Resmed Appnealink Plus. 4 Apnea, 12 Hypoapnea/M , AHI 19, Average O2 saturation 93%, lowest 83% once,pulse h 101, low 50, avg 74

then I wore Auto CPAP s9 along with TAP3  and AHI  was  0, All Apnea are gone, O2 average  was 95%  but lowest desaturation episode  was 76%, once, pulse H 104,lowest  47 and average 72

Why  does this lowest desaturation  event up to 83% occur even with CPAP ? Is this a clinically significant to seek  an opinion ? Does it happen  that  a normal person  in sleep  will have also desaturations ?

[Steven Y Park, MD]

I wouldn't read too much into the numbers. If your apneas were all gone with combination therapy, and as long as you're sleeping better, then I wouldn't  worry about it. All people stop breathing once in a while, which is normal. The other possibility that that low saturation was either an artifact, or the probe was temporarily dislodged. Another thing is that CPAP is not perfect. You'll still have a few breathing pauses that can cause desaturation, without it being a frank apnea.

[Mahen56]

Could you make your expert comments on my  question ?  Thanks