Following treatment with anesthetics, most patients’ exhalation breaths will contain residues of anesthetics, or nitrous oxide during a relative long period of time. To avoid having excessively high concentrations of gas in the room air, a special chin mask is used, which effectively evacuates the exhalation breaths from the patient during the first 15-20 minutes.

The chin mask is used for dental surgical procedures where a nasal mask is used, during labour and in the post-operative/recovery room for evacuation of gas residues from the exhalation breaths of the patient.