forest wrote:Hello,
I just recieved a Contec CMS50IW pulse oximeter. I don't think it works. Maybe I'm wrong.
Below is a study of me holding my breath for 1:05. I realize there is some latency in saturation decreasing, but I was under the impression it was about 15 seconds. I see no movement at all. The perfusion index was about 10% during the study. Thoughts?
Many times at my desk I have tried the experiment of simply doing a simple exhale (in stride with my current breathing rate) and stopping at the end of the exhale for thirty seconds. No real change occures in the SpO2 level during the breath hold or the thirty seconds proceeding. Sometimes increases, most times stays same, sometimes decreases perhaps two percent.
I practice eucapnic breathing looking at such things as a non-stuffy nose, non-plumped veins on the back of my hand (hand near heart level), nice warm feet, and inaudible heart beat holding my hand over my ear. My breathing is often considered shallow by my personal trainer although she agrees that the heart rates for exercise levels and pulse oximiter reading show that the job is being done well.
No doctor has ever even attempted to explain the very rapid desaturations that occur due to obstructions during sleep when asked after presenting the evidence as gathered above as well as the ability of some to hold their breath under water for as much as twenty two minutes and twenty two seconds while maintaining consciousness. It seems to be more of a stress reaction with perhaps some metabolistic changes rapidly occurring due changing from a hypocapnic (metabolism frustrated) to a hypercapnic (metabolism not frustrated) state.
I am not at all surprised that holding your breath for a minute causes little change.
