Worried about accuracy of new CMS 50D plus

I recently bought a CMS 50D plus apparently for spot checks, as I don't see any way that I would be able to keep it on all night without half a roll of duct tape

The problem is, the pulse rate always seems to be 10 to 14 percent higher than my actual pulse rate. My understanding is that the accuracy is supposed to be +- 2%. Obviously I have no idea what my actual SP02 is, so I am concerned that this number may be equally skewed. Am I missing something, should I just return it? I Would appreciate any thoughts or suggestions.

my specialist checked mine against his (so I trust he knows), as Ill be seeing him annually, Ill get it checked then.
that pulse anomoly is suspicious though, as we can check the pulse with a clock and brain.
possibly check it on another person, you might have heavy metal in your fingernails (just kidding), but there are some people for whom the O2 readings wont work on a pulse oximeter (the Wiki page mentions this). that's not pulse though, I don't think.

yawnny wrote:I recently bought a CMS 50D plus apparently for spot checks, as I don't see any way that I would be able to keep it on all night without half a roll of duct tape

The problem is, the pulse rate always seems to be 10 to 14 percent higher than my actual pulse rate. My understanding is that the accuracy is supposed to be +- 2%. Obviously I have no idea what my actual SP02 is, so I am concerned that this number may be equally skewed. Am I missing something, should I just return it? I Would appreciate any thoughts or suggestions.

How do you know this????? What are you checking it against???

LSAT wrote:

yawnny wrote:I recently bought a CMS 50D plus apparently for spot checks, as I don't see any way that I would be able to keep it on all night without half a roll of duct tape

The problem is, the pulse rate always seems to be 10 to 14 percent higher than my actual pulse rate. My understanding is that the accuracy is supposed to be +- 2%. Obviously I have no idea what my actual SP02 is, so I am concerned that this number may be equally skewed. Am I missing something, should I just return it? I Would appreciate any thoughts or suggestions.

How do you know this????? What are you checking it against???

All he has to do is check his pulse for 6 seconds x 10 LSAT.
Maybe he did for a whole minute.
Against a second hand!
Is it past your bedtime??

Buy a Blood Pressure tester, and then Race them, winner gets the others battery. How do you expect to change you pulse rate, med's, brain control or blood letting. Jim

Lizistired wrote:

LSAT wrote:

yawnny wrote:I recently bought a CMS 50D plus apparently for spot checks, as I don't see any way that I would be able to keep it on all night without half a roll of duct tape

The problem is, the pulse rate always seems to be 10 to 14 percent higher than my actual pulse rate. My understanding is that the accuracy is supposed to be +- 2%. Obviously I have no idea what my actual SP02 is, so I am concerned that this number may be equally skewed. Am I missing something, should I just return it? I Would appreciate any thoughts or suggestions.

How do you know this????? What are you checking it against???

All he has to do is check his pulse for 6 seconds x 10 LSAT.
Maybe he did for a whole minute.
Against a second hand!
Is it past your bedtime??

That would be a good comparison...BUT...he has not said that he did it that way....Maybe he used another device...Why don't we let him answer Lizzy

LSAT wrote:

Lizistired wrote:

LSAT wrote:

yawnny wrote:I recently bought a CMS 50D plus apparently for spot checks, as I don't see any way that I would be able to keep it on all night without half a roll of duct tape

The problem is, the pulse rate always seems to be 10 to 14 percent higher than my actual pulse rate. My understanding is that the accuracy is supposed to be +- 2%. Obviously I have no idea what my actual SP02 is, so I am concerned that this number may be equally skewed. Am I missing something, should I just return it? I Would appreciate any thoughts or suggestions.

How do you know this????? What are you checking it against???

All he has to do is check his pulse for 6 seconds x 10 LSAT.
Maybe he did for a whole minute.
Against a second hand!
Is it past your bedtime??

That would be a good comparison...BUT...he has not said that he did it that way....Maybe he used
another device...Why don't we let him answer Lizzy

Yep, finger on the pulse and some quick multiplication.

Curious thing, I had my wife put the thing on, let it register and took her pulse at the same time. The device's reporting of her pulse and my count at her wrist were virtually spot on. Also, her Sp02 was 99% which is usual for her. Anyway, I starting wondering how it could read correctly for her, and not for me.

The only difference that I could think of was that I had manually taken my pulse, then put the oximeter on, instead of measuring while the oximeter was on my finger, because it's a bit more cumbersome to do it while wearing the meter. Anyway, I did measure my pulse, while wearing the device, and the rates were close enough, about 3 % high on the meter still, but way better than 10-15. Dunno, maybe the anticipation of putting the meter on causes my pulse to increase. I'll keep messing with it for a couple of days, and if it stays around 3 % or less, I'll keep it, else send it back.

Hook up to the software, or use the graphing mode on the display and be sure your pulse is nice and smooth for a while before taking a reading.