Assessing the accuracy of ultrasound measurements of tracheal diameter: an in vitro experimental study

BMC Anesthesiology

Table 3 Relationship of cuff inflation volume (CIV), tracheal wall pressure (TWP), OTD% and ITD%

	Pearson Correlation coefficient, N = 451
	CIV	TWP	OTD%	ITD%
CIV	1.00	0.75 < 0.001	0.75 < 0.001	0.77 < 0.001
TWP	0.75 < 0.001	1.00	0.84 < 0.001	0.84 < 0.001
OTD%	0.75 < 0.001	0.84 < 0.001	1.00	0.95 < 0.001
ITD%	0.77 < 0.001	0.84 < 0.001	0.95 < 0.001	1.00

CIV Cuff inflation volume, TWP Tracheal wall pressure, OTD% Percentage change of outer transverse diameter, ITD% Percentage change of internal transverse diameter

ISSN: 1471-2253