Pousman RM, Koch SM. Endotracheal tube obstruction after orogastric tube placement. Anesthesiology 1997;87:1247-8.
Kubo K, Nakao S, Kawabata Y, Nishimae H, Masuko S, Shingu K. An unusual case of airway obstruction at the tip of an endotracheal tube caused by insertion of a nasogastric tube. J Anesth 2008;22:52-4.
Takrouri MSM, Nafakh R, Abbas AA. Suction Catheter Impaction In Preformed Nasal Endotracheal Tube (PNETT) During Pediatric Dental Anesthesia - Hazard Notice. The Internet Journal of Anesthesiology™ ISSN: 1092-406X.
Jagannathan N, Pak TY. An unusual complication of endotracheal tube suctioning. J Anesth 2009;23:170-1.