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Please use this identifier to cite or link to this item: http://hdl.handle.net/10564/2938

Title: A comparison of airway dimensions, measured by acoustic reflectometry and ultrasound before and after general anaesthesia.
Other Titles: 音響効果と超音波を用いた全身麻酔前後における気道径の比較
Authors: Ushiroda, Junko
Inoue, Satoki
Kirita, Tadaaki
Kawaguchi, Masahiko
Issue Date: Dec-2014
Publisher: John Wiley & Sons / The Association of Anaesthetists of Great Britain and Ireland
Citation: Anaesthesia Vol.69 No.12 p.1355-1363
Abstract: Changes in airway dimensions can occur during general anaesthesia and surgery for a variety of reasons. This study explored factors associated with postoperative changes in airway dimensions. Patient airway volume was measured by acoustic reflectometory and neck muscle diameter by ultrasound echography in the pre- and post-anaesthetic periods in a total of 281 patients. Neck circumference was also assessed during these periods. A significant decrease in median (IQR [range]) total airway volume (from 63.8 (51.8–75.7 [14.7–103]) ml to 45.9 (33.5–57.2 [6.4–96.3]) ml, p < 0.0001), and a significant increase in muscle diameter (from 4.3 (3.3–5.6 [2.2–9.0]) mm to 5.8 (4.7–7.3 [2.8–1.3]) mm, p < 0.0001) and neck circumference (from 34.0 (32.5–37.0 [29.5–49.0]) cm to 35.0 (33.5–38.0 [30.5–50.5]) cm, p < 0.0001) were observed. It may be possible that changes in airway volume and neck circumference were influenced by surgical duration or peri-operative fluid management (ρ) = −0.31 (95% CI −0.24 to −0.01), p = 0.0301, −0.17 (−0.23 to −0.06), p = 0.0038, 0.23 (0.12–0.34), p < 0.0001, and 0.16 (0.05–0.27), p = 0.0062, respectively). The intra-oral space can significantly decrease and neck thickness increase after general anaesthesia, and might increase the risk of difficult laryngoscopy and intubation if airway management is required after extubation following general anaesthesia.
Description: 博士(医学)・甲第626号・平成27年3月16日
Copyright © 1999-2015 John Wiley & Sons, Inc. All Rights Reserved.
© 2014 The Association of Anaesthetists of Great Britain and Ireland
URI: http://hdl.handle.net/10564/2938
ISSN: 00032409
Academic Degrees and number: 24601A626
Degree-granting date: 2015-03-16
Degree name: 博士(医学)
Degree-granting institutions: 奈良県立医科大学
Appears in Collections:2014年度

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