Related Experiment Video
Updated: Apr 15, 2026

Preoxygenation Techniques for Tracheal Intubation in Critically Ill Adults Utilizing Oxygen Mask and Noninvasive Ventilation
Published on: December 5, 2025
[A case of impossible ventilation after induction of anesthesia in a patient with massive nasal bleeding]
Abstract:
We report a case of impossible ventilation in a patient with severe nasal bleeding. A 47-year-old man with intractable nasal bleeding was scheduled for emergent hemostasis under general anesthesia. He also had alcohol-related cirrhosis and was highly obese (165 cm, 93 kg). Although he sufficiently fasted and did not experience nausea in the supine position, we planned crash intubation in the head-elevated position with the Pentax-AWS Airwayscope (AWS) in order to avoid vomiting after induction of anesthesia. After fentanyl, propofol, and rocuronium administration, the patient vomited a large amount of blood, which led to a deterioration of SpO2. Mask ventilatidn was impossible even after oral suctioning. We intubated the trachea with the Macintosh laryngoscope and suctioned blood from the trachea; SpO2 gradually improved and the trachea was washed with a large amount of normal saline. The patient was transferred to the intensive care unit and extubated uneventfully on day 3 postoperatively.
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