Medical Lasers; Engineering, Basic Research, and Clinical Application  
Removal of a Bronchial Foreign Body by Bronchoscopic Cryotherapy: A Case Study
Hyoyeon Kim, Gwanghyun Byun, Sang Joon Lee, Seung Hoon Woo
Department of Otolaryngology-Head and Neck Surgery, Dankook University College of Medicine, Cheonan, Korea
Correspondence to: Seung Hoon Woo
Department of Otorhinolaryngology-Head and Neck Surgery, Dankook University School of Medicine, 201 Manghyang-ro, Dongnam-gu, Cheonan 31116, Korea
Tel.: +82-41-550-1781
Fax: +82-41-550-7837
Received: August 24, 2020; Accepted: November 4, 2020; Published online: December 10, 2020.
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A foreign body in the airway can be a potentially life-threatening event. The diagnosis and treatment of foreign bodies in the airway are a challenge for otolaryngologists. Despite the improvements in medical care and public awareness, approximately 3,000 deaths occur each year from foreign body aspiration. A high degree of vigilance is required to ensure prompt treatment and avoid the complications of foreign body aspiration. The author encountered a case of a 77-year-old female patient who had aspirated an unknown foreign body that was fixed in her main bronchus. An initial attempt was made to remove it with a flexible bronchoscope but failed due to the patient’s hypoxemic state during the procedure. Under general anesthesia, a rigid bronchoscopic examination was performed, but it was difficult to approach the object due to the bronchus curvature. Instead, a cryotherapy instrument of bronchoscopy was applied. The foreign body was frozen and removed to the carina, where a laryngoscope and laryngeal forceps were used to remove it.
Keywords: Cryotherapy; Foreign body; Bronchoscope; Laryngoscope

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