Resuscitation and ventilation mask

A neonatal resuscitation mask for the delivery of a medical gas under positive pressure to a neonate, the mask including a body having an interior space, the body being generally frusto-conical and extending from a wider diameter adjacent a circular engagement seal to a narrower diameter at a distal end, a peripheral projection extending around the exterior of the body, the interior space being adapted in use to communicate with a source of medical gas at the distal end and deliver the medical gas to the interior space, the engagement seal being disposed directly below the peripheral projection, and being operatively adapted to surround the airway of the neonate and engage surrounding tissue, an interface of the engagement seal is configured to operatively seal with the tissue substantially outside the interior space, and wherein the surface of the engagement seal has a consistent cross-sectional shape in the vertical direction which is substantially part circular, and the engagement seal is solid and sufficiently rigid that operatively, when a suitable retention force is applied to the mask directly above the peripheral projection, an effective seal is produced at the interface of the engagement seal and the surrounding tissue primarily by deformation of the surrounding tissue to have the consistent cross-sectional shape in the vertical direction which is substantially part circular.