低氧血症是您血液中氧气含量低于正常水平，特别是在动脉中。低氧血症是与呼吸或循环相关问题的征兆，并可能导致各种症状，例如气短。
低氧血症是通过测量从动脉（动脉血气）中采集的血液样本中的氧气含量来确定。它也可以通过使用脉搏血氧仪测量您血液中的氧饱和度来预测，脉搏血氧仪是一种夹在您手指上的小设备。
正常动脉氧约为 75 至 100 毫米汞柱 (mm Hg)。低于 60 mm Hg 通常意味着需要补氧。正常脉搏血氧仪读数通常为 95% 至 100%。低于 90% 被认为是低血氧。
July 03, 2022
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