Fig. 2From: Lower airway obstruction due to a massive clot resulting from late bleeding following mini-tracheostomy tube insertion and subsequent clot removal and re-intubationSchematic of the mechanism of occlusion of the endotracheal tube. Suspected three-stage mechanism of airway obstruction. a Pre-intubation condition of the airway containing a clot around the insertion site of a mini-tracheostomy tube. b The clot falling into the trachea when the mini-tracheostomy tube was removed. c Lower airway obstruction caused by a clot. MT mini-tracheostomy, ETT endotracheal tubeBack to article page