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. 2013 Dec 4;21:83. doi: 10.1186/1757-7241-21-83

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Copyright © 2013 Harm et al.; licensee BioMed Central Ltd.

This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Cuff pressure according to method of assessment. Values are shown as median (25/75 percentiles) in cmH₂O (n = number of cases). Cuff pressure not checked: 70 (47.3/102.8) cmH₂O (n = 46); palpatory method: 43 (20.0/86.5) cmH₂O (n = 10); specific volume of air: 35 (17.5/85.0) cmH₂O (n = 14); cuff pressure manometer: 27 (20.0/30.0) cmH₂O (n = 22); acoustic method: 18 cmH₂O (n = 1). Dashed line indicates the upper safe cuff pressure limit. p < 0.001 for comparison of checked by manometer vs. not checked.