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KMID : 0356920070530060774
Korean Journal of Anesthesiology
2007 Volume.53 No. 6 p.774 ~ p.777
Expiratory Valve Malfunction Detected Immediately after Endotracheal Intubation - A case report -
Yang Hyun-Jung

Song Ji-Eun
Lee Jong-Yeon
Gill Hyun-Jue
Kim Min-Ku
Park Jung-Hyun
Chung Kuem-Hee
Kim Seung-Ho
Lee Sang-Woo
Yoo Chan-Kee
Abstract
The malfunction of an expiratory unidirectional valve (EV) can cause rebreath of expired gas, barotraumas, or ventilatory failure during the general anesthesia. The following is a report on a case of ventilatoryfailure caused by an EV that failed to open during the induction of anesthesia. A 57-year-old man was scheduled for the biopsy of a vocal cord polyp. After intubation, we could not detect the evidence of ventilation through the endotracheal tube. Suspecting the esophageal intubation, we administered extubation. The patient was still having difficulty in ventilating even after a retrial of intubation. Then we discovered the EV was failing to open properly with ventilation and thus not able to function properly. The common cause of ventilatory failure immediately after intubation is malposition of an endotracheal tube, like esophageal intubation, and equipment failure also has reported. Accordingly, we should remember possible causes of ventilatory failure after intubations and routine conscientious inspection of the ventilator.
KEYWORD
complication, expiratory unidirectional valve, machine malfunction
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