Background: Difficult airway may result in significant morbidity and mortality. Proficient airway evaluation,\ntherefore, is one of the key elements in the safe conduct of anesthesia. A three-dimensional (3D) printing model\nwas recently introduced for medical application. 3D printing is a fast, convenient, and relatively affordable\ntechnique. We present a case in which a 3D-printed airway model was successfully used for airway evaluation.\nCase presentation: A 77-year-old man who had previously undergone total laryngectomy was scheduled for\nresection of a pelvic mass. The condition of his airway, however, complicated the procedure. Routine methods to\nevaluate his airway were not suitable. Therefore, the patient�s computed tomography imaging data were used to\ngenerate stereolithography files and then to print out 3D models of his trachea. These 3D models enhanced our\nunderstanding of his tracheal morphology. They helped us devise a preanesthesia plan and effectively execute it\nwithout complications.\nConclusion: 3D printing models allow better understanding of morphological changes in the airway and aid\npreanesthesia planning. The successful outcome of
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