“快乐缺氧”(Happy Hypoxia)又称沉默低氧血症(Silent Hypoxia)是最近在新冠肺炎患者身上所察觉到的一种奇怪现象。这种低氧血症完全没有症状。1
那什么是低氧血症?通常在肺部受到感染或损伤后,肺部机能将受影响,而造成肺部不能如常地为血液提供充足的氧气。这将造成血氧浓度(SpO2)降低,患者便会开始有呼吸急促、头痛、咳嗽等症状。2
但在一些新冠肺炎患者身上并没有以上所描述的低血氧症的症状。患者的呼吸频率并没有增加。患者还是能够照常生活且意识清楚。3 但在检验报告中发现,这些患者的血氧浓度确实已经降低,有些甚至低至70%!3 目前为止还不清楚为什么新冠肺炎会有这种奇特的现象出现。
为了避免延迟就医,一些医生建议在家使用脉冲式血氧浓度器(Pulse Oximeter)以检测血氧浓度。正常的血氧浓度为95%以上。4 若仪表上持续显示血氧浓度低于95%,请立即就医,以避免体内细胞和各器官缺氧,从而导致严重后果。
那真的应该马上购买脉冲式血氧浓度器吗?3 如果是确诊新冠肺炎患者,若有此类检测器是最好不过。若已确诊,无论是否有任何症状,务必密切留意血氧浓度(保持在95%以上)。倘若您并不是确诊患者,且无任何呼吸苦难的情况,此类检测器并不是必须的。
若想得知更多关于脉冲式血氧浓度器的资讯,可阅读以下的文章:
1. What is Pulse Oximetry
2. Should I Get a Pulse Oximeter? A Pharmacist Guide
若对新冠肺炎或“快乐缺氧”有任何疑问可到您临近的康宁药剂行询问我们的药剂师,或追踪我们康宁药剂的脸书,以获得最新可靠的消息。
参考:
- UNIVERSITY OF SEVILLE. 关于众多covid-19患者检测到的血液中缺氧的解释. https://www.eurekalert.org/pub_releases_ml/2020-12/uos-j122920.php (accessed 31st May 2021).
- Carol DerSarkissian, MD. Hypoxia and Hypoxemia. https://www.webmd.com/asthma/guide/hypoxia-hypoxemia (accessed 31st May 2021).
- Martin J. Tobin, Franco Laghi, and Amal Jubran. Why COVID-19 Silent Hypoxemia Is Baffling to Physicians. Am J Respir Crit Care Med 2020; 202(3): 356-360 .
- World Health Organization. Pulse Oximetry Training Manual. Switzerland: World Health Organization; 2021. https://www.who.int/patientsafety/safesurgery/pulse_oximetry/who_ps_pulse_oxymetry_training_manual_en.pdf (accessed 31st May 2021).
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