Supraglottic airway device with a dynamic cuff with superior ventilating capability

A supraglottic airway device for insertion into an oral cavity for ventilation comprising;

• a shaft comprising three cylindrical tube members:
• a ventilating lumen, a cuff-inflation lumen, and a suctioning lumen, each extending from a proximal end up to a distal end of the shaft arranged with their long axes parallel and adjacent to each other;
• an elliptical bowl formed by a distal end of the ventilating lumen, wherein the elliptical bowl is surrounded on its sides by a dynamic cuff comprising one or two inflatable compartments on a side and at a rear of the elliptical bowl;
• and
• an adapter having a proximal end and a distal end, the distal end comprising two unequal ports, wherein the proximal end of the adapter is configured to be connected to an outlet port of a mechanical ventilator or a manual resuscitator, and the distal end of the adapter is configured to be connected through the two unequal ports to proximal ends of the ventilating lumen and the cuff-inflation lumen;
• wherein the adapter diverts a portion of pressurized air from the mechanical ventilator or the manual resuscitator into the dynamic cuff in a direction essentially parallel to that of respiratory gas movement in real-time, through the cuff-inflation lumen;
• wherein the one or two inflatable compartments are configured to automatically inflate during positive pressure ventilation and automatically deflate during expiration in response to the pressurized air diverted by the adapter, thereby cyclically forming and releasing an airway seal in synchronization with respiratory gas movement;
• and
• wherein the suctioning lumen is provided with apertures proximal to a distal end of the suctioning lumen and allows pharyngeal suctioning through these apertures, thereby improving the airway seal.