Can Intubation Guide Mark Provide Adequate Information for Tube Positioning?

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  • 声門マーカーを指標とした気管チューブ固定の問題点

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  We retrospectively investigated the incidence of endobronchial intubation when the intubation guide mark was positioned at the level of the vocal cords. The chest radiographies of 283 patients who underwent general anesthesia were reviewed, and the distance between the endotracheal tube (ETT) tip and the carina (TT-C) was measured. The incidence of endobronchial intubation and the high risk (TT-C < 2.5 cm) subjects was 1.4% and 18.4% of all, respectively. Females had significantly higher risk of endobronchial intubation. The distance between the intubation guide mark and the tube tip (DM) of the ETT is not consistent among manufacturers. These findings suggest that when DM is considered in choosing the tube size, the intubation guide mark would be useful in deciding adequate ETT positioning.

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