S-Space College of Medicine/School of Medicine (의과대학/대학원) Anesthesiology and Pain Medicine (마취통증의학전공) Journal Papers (저널논문_마취통증의학전공)
Alternative method for predicting optimal insertion depth of the laryngeal tube in children
- Kim, J. T.; Jeon, S. Y.; Kim, C. S.; Kim, S. D.; Kim, H. S.
- Issue Date
- Oxford University Press
- Br J Anaesth. 2007 Nov;99(5):704-7. Epub 2007 Aug 27.
- Anesthesia, General; Anthropometry/methods; Child; Child, Preschool; Cricoid Cartilage/anatomy & histology; Cross-Over Studies; Female; Fiber Optic Technology; Humans; Infant; Intubation, Intratracheal/methods; *Laryngeal Masks; Larynx/anatomy & histology; Male
- BACKGROUND: Little information is available about the accuracy of the teeth mark on the laryngeal tube (LT) as a guide to correct placement in children. The aim of this crossover study was to evaluate three methods for optimal insertion depth of the size (#) 2 tube in children weighing 12-25 kg. METHOD: In 24 children, the LT #2 was consecutively inserted by three different methods: (A) until the thick teeth mark on the tube was aligned with the upper incisors, (B) until resistance was felt, and (C) by inserting to a depth, previously measured, of the curved distance between the cricoid cartilage and the upper incisor. In each case, the depth of insertion, the degree of effective ventilation, the presence of leakage, and the fibreoptic view were assessed. RESULTS: Insertion based on the teeth mark led to a shorter insertion depth and a greater incidence of inadequate ventilation compared with the other two methods. There was no difference in the adequacy of ventilation between methods B and C. The vocal cords were more easily identified with methods B (62.5%) and C (75%) than with method A (12.5%). CONCLUSIONS: Insertion of the LT #2 aligned with the teeth mark can result in a shallow insertion depth and inadequate ventilation. The measured distance from the cricoid cartilage to the upper incisor offers alternative guidance for correct LT insertion.
- 1471-6771 (Electronic)
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