1. Mask induction achieved. 2. Ossoff-Pilling microlaryngoscope introduced, patient suspended, and jet ventilation initiated. 3. Using operating microscope and AcuBlade CO2 laser, releasing incisions made at 12 o? clock, 1 o?clock, and 4 o?clock with a wedge resection at 4 o? clock. 4. Depo-Medrol injected into surrounding tissues (not shown). 5. Acclarent 16 mm balloon dilated for 60 seconds. 6. Mitomycin C 0.4 mg/mL applied topically for 2 minutes (not shown).

Adult Idiopathic Subglottic Stenosis

Inability to tolerate general anesthesia or achieve adequate oxygenation/ventilation via face mask and jet ventilation. Treatment medication allergy.

Mask ventilation, Ossoff Pilling Microlaryngoscope, Suspension Arm, Operating Microscope, AcuBlade CO2 laser, Laryngeal injection needle with Depo-Medrol, Acclarent 16 mm endoscopic balloon, and Mitomycin C.

Prior scope imaging and cross-sectional radiological imaging. Clinical and/or laboratory analyses to rule out Granulomatosis with Polyangitis and clinical assessment for Gastroesophageal Reflux Disorder.

Suspension Microlaryngoscopy to identify glottic airway and identify the subglottis stenosis. Limit treatment to the subglottic narrowing without applying laser energy to tracheal wall proper or extra-luminally.

Well-tolerated without external scar but subglottic stenosis may recur.

Orodental trauma, injury to trachea, esophageal perforation, laser injury (including to eyes and skin), pneumothorax, adverse reaction to medication, pain, bleeding, infection, scarring, failure of the intended procedure, recurrence of subglottic stenosis, loss of airway, death.

Orodental trauma, injury to trachea, esophageal perforation, laser injury (including to eyes and skin), pneumothorax, adverse reaction to medication, pain, bleeding, infection, scarring, failure of the intended procedure, recurrence of subglottic stenosis, loss of airway, death.

None

None