| Optimal headrest height for the best laryngoscopic view: by anatomical measurements. | |
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MedLine Citation:
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PMID: 22424993 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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BACKGROUND: We hypothesized that the oro-pharyngolaryngeal axes, occipito-atlanto-axial extension (OAA) angle and intubation distance would be influenced by the height of headrests. METHODS: Twenty patients were enrolled. The Macintosh 3 blade was used for direct laryngoscopy without a headrest or with the headrest of 6 or 12 cm high in randomized order, whereas a lateral radiograph of the neck was taken when the best laryngoscopic view was obtained. The following measurements were made: (1) the axis of the mouth (MA), the pharyngeal axis (PA), the laryngeal axis (LA), and the line of vision (LV). The various angles between these axes were defined: α angle between MA and PA, β angle between PA and LA, and δ angle between LV and LA. (2) Intubation distance, (3) mentovertebral distance, and (4) OAA angle. RESULTS: Compared with 12-cm and no headrest, the δ angle decreased significantly with 6-cm headrest (19.4°/29.2°/29.2° in 6-cm/12-cm/no headrest, respectively; P < .001), and the intubation distance increased significantly (46.2/37.3/38.7 mm in 6-cm/12-cm/no headrest, respectively; P < .001). Mentovertebral distance was smallest (107.0/106.7/98.5 mm; P < .05) at 12-cm headrest. Occipito-atlanto-axial extension angle was largest significantly (40.7°/35.2°/34.5°; P < .05) at 6-cm headrest. CONCLUSION: We conclude that compared with no or 12-cm headrest, 6-cm headrest could facilitate more alignment of these axes, increase the OAA angle, and enlarge the intubation distance. |
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Authors:
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Young-Tae Jeon; Jung-Won Hwang; Kyuseok Kim; Cheol-Kyu Jung; Hee-Pyoung Park; Sang-Heon Park |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-3-16 |
Journal Detail:
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Title: The American journal of emergency medicine Volume: - ISSN: 1532-8171 ISO Abbreviation: - Publication Date: 2012 Mar |
Date Detail:
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Created Date: 2012-3-19 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8309942 Medline TA: Am J Emerg Med Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2012. Published by Elsevier Inc. |
Affiliation:
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Department of Anesthesiology and Pain Medicine, Seoul National University Bundang Hospital, 166, Gumi-ro, Seongnam City, Kyeonggi-do, 463-802, Korea. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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