Abstract
Two cases of unexpected difficult intubation during induction of general anesthesia were reported. The first case, a 68-year-old male was scheduled for coronary artery bypass surgery. The second case, a 94-year-old male with senile dementia was arranged for exploratory laparotomy. Anesthesia was induced with diazepam 10 mg, fentanyl 30 micrograms/kg, and pancuronium 8 mg in the first case while in the second case fentanyl 100 micrograms, lidocaine 80 mg, thiopental 200 mg and succinylcholine 80 mg were used. In these two cases oral tracheal intubation with laryngoscope was unsuccessful. Assisted ventilation could be maintained via a face mask. With the help of direct laryngoscopy, fiberoptic bronchoscope-aided nasotracheal intubation was successfully achieved.
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