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. 2020 Dec 31;29(2):121–133. doi: 10.1016/j.jsps.2020.12.014

Fig. 5.

Fig. 5

Restrictive airflow due to face mask may lead to hypercapnia and hypercapnia associated secondary complications include tachycardia, dyspnea, confusion, flushed skin, dizziness and headache, and severe hypercapnia can lead to respiratory failure with symptoms of depression, papilledema and seizure.