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Figure 1 | Critical Care

Figure 1

From: Traditional landmark versus ultrasound guided tracheal puncture during percutaneous dilatational tracheostomy in adult intensive care patients: a randomised controlled trial

Figure 1

Measuring puncture deviation from the tracheal midline. Aligning the protractor with the anterior tracheal wall at the level of the puncture, followed by rotating so that the transverse axis is parallel with the posterior tracheal wall, defines the geometrical anterior tracheal midline. Deviation of the puncture was then determined in degrees.

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Critical Care

ISSN: 1364-8535