Endotracheal intubation can induce laryngotracheal injury which results in narrowing of the airway due to edema of the glottis. This can increase the risk of development of post-extubation stridor (PES)

Ultrasound (US) is a useful and non-invasive tool for the evaluation of vocal cords and laryngeal morphology in intubated patients. The laryngeal air-column width (LACW), Laryngeal air column width difference (LACWD), and laryngeal air-column width ratio (LACWR) measured by ultrasound can potentially identify patients at risk of post-extubation stridor, in whom caution should be taken after extubation.

The cuff-leak test can predict successful extubation through using the difference between the expired tidal volume with the cuff inflated and with the cuff deflated; the higher the leak, the lower the likelihood that post-extubation stridor will occur.

Inclusion Criteria:

• Adult patients (>18 years)
• American Society of Anesthesiologists status I and II
• undergoing elective maxillomandibular fixation surgeries under general anesthesia with nasal endotracheal intubation

Exclusion Criteria:

• patients' refusal
• pregnant females
• patients with body mass index <18.5 or ≥ 35 kg/m2
• risk of aspiration
• cardiorespiratory disorder
• neuromuscular disease
• uncontrolled diabetes mellitus
• gastrointestinal bleeding
• on chronic steroid therapy
• intubated patients or were intubated or had upper airway infection within 1 week prior to surgery
• history of any pathology, radiotherapy or surgery in the neck
• had difficult laryngeal US plane (as neck wound)

The preoperative aerosolized drug will be applied by an anesthetist who is not involved in further patient care