方法：招募60例需要眼科手术治疗的中国患者，在眼科局部麻醉手术期间给予医用口罩作为COVID-19预防措施之一。采用吸氧和气体负压引流的方法缓解患者佩戴口罩存在的潜在呼吸不适感，并进行呼吸舒适度评分。

结果：佩戴医用口罩患者出现轻到中度呼吸不适，总体平均得分为2.34±0.73分。吸氧和气体负压引流缓解了呼吸不适(总平均得分为0.15±0.75分，P<0.001)。呼吸不适或呼吸不适缓解度不存在性别和手术时间差异。术中出现负压气体引流失败会导致严重呼吸不适。

结论：吸氧和气体负压引流可维持局部麻醉下佩戴医用口罩患者的呼吸循环。在COVID-19疫情期间建议接受眼科局部麻醉手术的患者佩戴医用口罩，以保护眼科医护人员。

METHODS:Sixty Chinese patients needed eye surgery treatment were recruited and given medical face masks as one of the COVID-19 precaution practices during eye surgery with local anesthesia. Oxygen supplementation and negative pressure drainage were applied to relieve the potential respiratory discomfort, and the respiratory comfort score was evaluated.

RESULTS:Patients with medical face masks experienced mild to moderate respiratory discomfort with an overall mean score of 2.34±0.73. Supplementation of oxygen together with negative pressure drainage relieved this discomfort(overall mean score of 0.15±0.75; P<0.001). There is no gender and operation time difference on respiratory discomfort or discomfort relieve. Failure in negative pressure drainage led to severe respiratory discomfort.

CONCLUSION:Negative pressure drainage could maintain the respiratory circulation in patients with medical face mask under eye surgery with local anesthesia. Application of medical face masks in patients under surgeries is recommended to protect the medical practitioners during the operations within COVID-19 outbreak.