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KMID : 0374920180390010047
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Inje Medical Journal
2018 Volume.39 No. 1 p.47 ~ p.52
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A Study of Relationship Between Pressure of Balloon Cuff of Intubating Tube and Bronchial Aspiration
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Han Yong-Jae
Kim Myoung-Hun
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Abstract
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Objective: Balloon cuff of intubating tube is very important for sealing in trachea. Enclosed air flow during positive pressure mechanical ventilation and prevention from aspiration are main purposes for balloon cuff of intubating tube. Too high or low pressure of balloon cuff can induce some problem like sore throat, rupture of trachea, aspiration pneumonia and leakage of volatile anesthetic gas. This study was designed to evaluate relationship for pressure of balloon cuff and micro-aspiration.
Methods and Materials: 7 Fr intubating tube was located in plastic pipe which internal diameter is 2cm. Air was injected to balloon cuff of intubating tube depending on cuff pressure as 20, 30, 40 cmH2O. After ballooning, 5 ml white dye solution was injected above balloon cuff. And then, we observed solution until a leak occurs.
Results: There were leakage immediately when balloon cuff pressure were 20 and 30 cmH2O through friction between balloon cuff and pipe. And there was leakage after 90 seconds when balloon cuff pressure was 40 cmH2O through crease on balloon cuff due to not-fully expanded balloon cuff.
Conclusion: Our results showed even 40 cmH2O cuff pressure cannot prevent micro-aspiration. That was caused by crease on balloon cuff due to not-fully expanded balloon cuff. Small size intubating tube with fully expanded balloon cuff will be needed for preventing micro-aspiration. But, our study had lots of limitation since simplification. Further evaluation is needed.
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KEYWORD
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Balloon cuff pressure, Aspiration
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