Flange Fracture and Dislocation: An Unusual Complication of Percutaneous Tracheostomy.

Percutaneous dilational tracheostomy (PDT) is a commonly used technique in intensive care units (ICUs) for persistent respiratory failure. Early complications of placement includeairway loss, bleeding, and tracheal ring fracture. Tracheostomy tube fracture is a rarely reported complication that can lead to loss of airway and require emergent intervention. We present two case reports of tracheostomy flange fracture and dislocation after PDT. Shortly after insertion, the tracheostomy flange was incidentally noted to have irreparably fractured and separated from the outer cannula. Both patients were orotracheally intubated and converted to open revisional surgical tracheostomy. Outer cannula separation from the flange is a rare but important complication of PDT due to the risk of occult airway loss. The tracheostomy tube supplied in the PDT set is manufactured in three parts and the plastic outer cannula is snapped to the silicone flange during manufacturing. The flange is not meant to be separated during insertion or use. PDT insertion requires significant force to be exerted, as the catheter has to travel through the subcutaneous tissue of the neck before entering the trachea. These cases suggest that the junction of the flange and the outer cannula may be a weak point and that fracture and dislocation at that site may occur due to excessive or misdirected force. Dislocation may cause loss of airway and a need for orotracheal intubation as performed in our cases. Understanding this complication and carefully examining the flange after placement is essential for early recognition to avoid loss of airway.