title: The Hafnia A circuit: a valveless non-polluting anaesthetic system.
mesh_terms: D000403:Airway Resistance; D000769:Anesthesia, Inhalation / Q000295:instrumentation*; D002245:Carbon Dioxide / Q000032:analysis; D006801:Humans; D010313:Partial Pressure; D012119:Respiration; D013990:Tidal Volume
chemical_list: D002245:Carbon Dioxide