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General Article
Anesthesia and Pain Medicine 2011;6(1):96-99.
Published online January 31, 2011.
Airway obstruction in heat & moisture exchanger filter: A case report
Mee Young Chung, Weon Joon Yang, Ji Young Lee
Department of Anesthesiology and Pain Medicine, The Catholic University of Korea College of Medicine, Seoul, Korea. leeji@catholic.ac.kr
Abstract
Heat and moisture exchanger filters (HMEF), used for humidification of patient respiratory gas and filtering microorganisms can cause airway obstruction. We experienced serious airway obstruction in a HMEF after making hydrothorax for high intensity focused ultrasound (HIFU) procedure. The airway obstruction was difficult to differentiate from severe bronchospasm irresponsive to bronchodilator therapy. It was relieved dramatically after we removed the filter from the breathing circuit as soon as we detected air-fluid meniscus in it.
Key Words: Airway obstruction, Heat and moisture exchangers


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