AIRBORNE precautions are recommended in patients with bacterial and viral infections transferred via aerosolization (including Mycobacterium tuberculosis, rubeola, varicella, influenza and coronavirus disease 2019 [COVID-19]). Surgical procedures requiring lung isolation during airborne precautions require adaptations to limit environmental contamination.

A double lumen tube or bronchial blocker may be used for lung isolation. An unfiltered, open airway is problematic during airborne precautions. Previously described, an antiviral filter should be placed on the surgical lung lumen of a double lumen tube (fig. 1).1,3 

After positioning, opening of the bronchial blocker proximal port to the atmosphere allows for surgical lung deflation. The Arndt Endobronchial Blocker Set (Cook Medical, USA) contains a continuous positive airway pressure 15-mm adaptor, which when inserted into the proximal port facilitates antiviral filter application (fig. 2A)....

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