【急诊重症篇】血氧饱和度严重程度分级
bilibili满肚子医学知识
【急诊重症篇】血氧饱和度严重程度分级
血氧饱和度（SpO2）指血液中氧合血红蛋白（HbO2）占全部可结合氧的血红蛋白容量的百分比，是评估机体氧供状态的核心指标，直接反映肺换气功能和血液循环效率。正常值范围健康成人静息状态下动脉血氧饱和度（SpO2）为95%-100%。轻度低氧血症：SpO2 90%-94% ...
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Your pulse ox says 98%. Everything’s fine… right? Not always. SpO₂ measures hemoglobin saturation, not how much oxygen is actually being delivered to tissues. A patient can have a normal SpO₂ and still be hypoxic in certain situations, like severe anemia or carbon monoxide poisoning. Understanding the difference between oxygen saturation and oxygen delivery is an important concept for nursing exams and clinical practice. If the bus analogy helped you understand it, drop a 🚌 in the comments. #nu
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