A HUMAN NECESSITIES
A61 MEDICAL OR VETERINARY SCIENCE; HYGIENE
A61M DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
A61M16/00 Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
A61M16/06 Respiratory or anaesthetic masks
A61M16/0683 Holding devices therefor