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Fig. 1 | BMC Anesthesiology

Fig. 1

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

Fig. 1

The sonogram shows the porcine trachea in the transverse plane. Water bladder (▲); ultrasonography gel (*); lines indicate outer transverse diameter (OTD) (1), internal transverse diameter (ITD) (2) and anterior tracheal wall thicknesses (ATWT) (3). a Cuff inflation volume is 0 mL. b Cuff inflation volume is 10 mL. c Tracheal diameter measurement. OTD (width between two white arrows; dotted line); ITD (two white arrowheads); ATWT (yellow vertical line); A-M interface (A-M); tracheal outer edge

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