Endoscopic Mucosal Injection Versus Ultrasound-Guided Injection of Triamcinolone to Treat Subglottic Stenosis

Inclusion criteria

• 1: "Diagnosed with subglottic stenosis through laryngoscopic examination or imaging studies such as CT."
• 2: "Experiencing symptoms related to subglottic stenosis, such as breathing difficulties, hoarseness, etc."

Exclusion criteria

• 1: "Severe cardiopulmonary dysfunction, patients extremely debilitated and unable to tolerate the procedure."
• 2: "Patients allergic to lidocaine, midazolam, triamcinolone, or any of their components."
• 3: "Pregnant or lactating women."
• 4: "Unstable angina, congestive heart failure, severe bronchial asthma."
• 5: "Severe hypertension and arrhythmias, hemodynamically unstable, and severe respiratory failure (PaO2 <60mmHg after oxygen therapy or mechanical ventilation)."
• 6: "Known coagulation dysfunction, inability to stop anticoagulants, antiplatelet agents, aspirin, or nonsteroidal anti-inflammatory drugs before treatment."
• 7: "Patients do not agree to participate in this study."
• 8: "Participation in other studies within the last three months and not withdrawn or concluded, or having received triamcinolone treatment less than 1 month ago."
• 9: "Researchers believe there are any circumstances making the patient unsuitable for inclusion."