**6.4 Ultrasound-guided prediction of post-extubation stridor**

In intubated patients, assessment of vocal cords and larynx morphology by US helps to predict post-extubation stridor. US-guided air-column width measurement identifies patients at higher risk for post-extubation stridor so that appropriate measures can be taken after extubation. A reduced laryngeal air column width difference or ratio (pre-intubation vs. pre-extubation values, with the ETT cuff deflated) has been shown to be a good predictor of post-extubation stridor [14, 15]. **Figure 2** demonstrates measurement of air column width with the cuff deflated.
