CTICasesKing Supraglottic Airway Device
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Imaging findings
Chest radiograph shows an unusual, large gas-filled and soft tissue structure located in the hypopharynx and upper neck, associated with a tube that passes down into the esophagus. Closer inspection reveals two inflated balloons: a larger oropharyngeal cuff and a smaller esophageal cuff, along with a separate gastric drainage tube running through an auxiliary lumen.
Key takeaways
The King laryngeal tube (King LT) is a supraglottic airway device designed for blind insertion and temporary ventilation, commonly used by emergency medical services in the prehospital setting as an alternative to endotracheal intubation. The dual-cuff design seals the esophagus and the oropharynx, forcing ventilated air directly into the larynx. Radiologists must recognize the characteristic radiographic appearance of this device and its dual-balloon system to avoid misinterpreting the inflated cuffs as abnormal anatomical collections, free air, or esophageal perforation.
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