Esophageal seal is not the only consideration in supraglottic airway devices.
Genzwuerker
Harald V
HV
Hinkelbein
Jochen
J
D004947:Esophagus / Q000502:physiology*; D005931:Glottis / Q000502:physiology; D006801:Humans; D007442:Intubation, Intratracheal / Q000295:instrumentation*; D017214:Laryngeal Masks