What Your Sleep Report Is Actually Telling You - Understanding SpO2 Desaturation and Thresholds
Автор: S2D Analytics
Загружено: 2026-01-16
Просмотров: 11
Описание:
Your blood oxygen level is a key window into your breathing, but did you know that sleep inherently makes your respiratory control unstable? We explain the physiology of SpO2.
In this explainer, we explore why clinicians track SpO2 (blood oxygen saturation) while you sleep and why nighttime levels can have predictive value for your daytime health. We analyze how the body’s control over breathing changes during different stages of rest—specifically how the response to low oxygen is "dulled" during NREM sleep and becomes erratic during REM sleep.
We also define the critical clinical terms found in sleep reports, such as "desaturation" and its link to shallow breathing events known as hypopneas. Furthermore, we clarify the specific diagnostic thresholds used to identify sleep-related hypoxemia—specifically, oxygen levels dropping to or below 88% for five minutes or longer. Finally, we examine the evidence regarding the long-term cardiovascular and cognitive risks associated with chronic nocturnal oxygen drops.
If you value clear, evidence-based physiology education, please consider subscribing and sharing this resource with others navigating sleep health.
— Sleep2DreamAnalytics Education-first sleep science. Not medical advice.
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