CMS 50D+ accurate?

Im huge on trying to track all this stuff and I was wondering how accurate the CMS 50D+ is? I bought it and used a rubber band to secure in place while I took a nap. I just wanted to test it out as well as the new heated hose before I go to bed later tonight.

The reason why I as how accurate it is because it still shows desaturations without any other issues reported in sleepyhead.

Thanks,



It looks like the drop probably started when I actually fell asleep.

It's actually normal for there to be a small drop in the oxygen levels during sleep....So I don't think anything bad is happening and the pulse ox is likely accurate. Looks like the normal small drop that can happen when we are asleep.

Ok thanks , I'll give it ago for whole night tonight to see if it's just more of same.

USMCVet wrote:it still shows desaturations

Nothing significant.

I've used mine for a few years. It works perfect. I've shown the report page to a couple doctors. I took the report to my pulmonologist for my wife. he ordered the fancy dme test for the insurance and the results were the same. she needed o2 bled in her cpap line.

I wore it for 7 more hours last night. Got down to 88% with average low of 91.2% and basal sp02 of 93.2%.

Definitely not where I want it but agree no need to go crazy over it. I'll definitely collect more data and bring it up at next appointment though.

Look at the times where it went down to 88 really closely and look for gray lines where their might be loss of contact artifact being the cause of the reduction reported.
Look really close at the drop and increase itself. Real desats go down gradually and come up gradually. Sharp drops and increases usually mean a loss of contact.

Here is how it shows in sp02 assistant.



I can't really show it in sleepyhead because it didn't import to right day. Looks like this occurred right around hypopnea this time.

It is extremely unlikely that a lone hyponea would cause any desat. Not enough flow reduction and most likely not nearly long enough in duration.

Put the thing on your finger and watch the pulse ox...hold your breath for as long as you can hold it and see if the oxygen level changes significantly.

Holding breath knocked it down to 96 from 98. Walking upstairs knocked it down to 90 though and when I put it on after coming up from basement it was 89 with some shortness of breath.
33 y/o former smoker with exposure to asbestos and recently had chest x-ray which was clear.

A finger pulse Ox, doesn't measure O2 instantly, because it doesn't change instantly when you stop breathing. You can give CPR 4 to 5 minutes with out breathing for the patient. O2 is stored in the blood and body tissues. CPR circulates that blood and it's O2. The pulse ox measures a avg of O2, many are not reliable if you are exercising, they are meant to use at rest.

Do they measure accurately, but what they see is not like a switch on a light bulb, think a capacitor in the mix, smoothing the action. Jim

I figure the sensor itself has a 5 second delay because it takes that long to show first readings. Who knows .

USMCVet wrote:I figure the sensor itself has a 5 second delay because it takes that long to show first readings. Who knows .

That's the booting of the unit, changes in blood readings happen slower, there are many thing more important than the O2 meter readings.

In history class while bored, I put a glass thermometer in my mouth pressed on the bulb, watching the red go up and down. All was well until the glass broke.

Not a good diversion to boredom, but a good learning lesson. Jim

I used to smoke and during that time I also used a E cigarette. Curiousness got the best of me to I took apart the "filter". Inside was wet cotton. My heart rate started to increase and then it dawned on me..... Nicotine can absorb through skin and can be deadly, ran and washed my hands and never did that again either lol.

I'm just determined to feel better as quick as possible and trying to do anything possible to achieve it. I am actually feeling more awake but then these strong urgesncome on to take a nap. At least I know I'm going in the right direction.

USMCVet wrote:I used to smoke and during that time I also used a E cigarette. Curiousness got the best of me to I took apart the "filter". Inside was wet cotton. My heart rate started to increase and then it dawned on me..... Nicotine can absorb through skin and can be deadly, ran and washed my hands and never did that again either lol.

I'm just determined to feel better as quick as possible and trying to do anything possible to achieve it. I am actually feeling more awake but then these strong urgesncome on to take a nap. At least I know I'm going in the right direction.

Naps are good, just make sure you hook up and turn on the machine, however they may make you too awake to sleep at night. Jim

It took years of damage to get the way we are, repair isn't overnight, also we are older every day, backsliding!