lid, to be applied to the patient during transnasal procedures for skull base pathologies as a further possible COVID-19 mitigation strategy.

Results
The nose lid is cheap, promptly available, and can be easily assembled with the use of few tools available in the OR; this mask allows to both operating surgeon and his assistant to perform wider surgical maneuvers throughout the slits, without ripping it, while limiting the nostril airflow.

Conclusions
Transnasal surgery, transgressing respiratory mucosa, can defini