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Updated: Feb 13, 2026

Point-of-Care Ultrasound: A Review of Ultrasound Parameters for Predicting Difficult Airways
Published on: April 7, 2023
Unanticipated difficult airway due to undiagnosed oropharyngeal stenosis: a case report
Mina Nishimori1, Miyako Matsumoto2, Hideki Nakagawa3
1Department of Anesthesiology, Seibo International Catholic Hospital, 2-5-1, Nakaochiai, Shinjuku, Tokyo, 161-8521 Japan.
Abstract:
Unanticipated difficult airway is a challenging problem for anesthesiologists. Oropharyngeal stenosis (OPS) is a rare complication of upper airway surgery which may cause difficult airway. We present a patient whose postsurgical OPS was revealed during the induction of general anesthesia, and necessitated reschedule of surgery and tracheotomy. We also discuss the etiology and risk factors of postsurgical OPS.
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