Local Steroid Injection via the Cricothyroid Membrane in Patients With a Vocal Nodule

초록

Objective: To analyze the usefulness and safety of a steroid injection into vocal nodules via the cricothyroid membrane. Local administration of steroid directly into the larynx has been reported in many laryngeal diseases with different methods. Design: Prospective case series at an academic tertiary care hospital. Patients: Eighty patients with vocal nodules were enrolled between December 2008 and May 2010. Interventions: Triamcinolone acetonide was injected through the cricothyroid membrane with a transnasal flexible laryngoscope to patients in a sitting position. Main Outcome Measures: Vocal nodules were evaluated before and 2 and 4 weeks after the injection; improvement was assessed both objectively and subjectively. Results: The nodules disappeared in 35 patients by the fourth week after the injection (44%), and 39 patients showed improvement (49%). Jitter, shimmer, maximum phonation time, and mean voice handicap index also improved significantly after the steroid injection (P < .05 for all). Six patients with voice-related occupations showed improvement at the second week (8%), but the nodules had recurred after 4 weeks. Four patients experienced mild vocal fold atrophy, and 2 patients showed a white plaque formation on the vocal fold that resolved spontaneously 1 to 2 months after the injection. Conclusions: A local steroid injection via the cricothyroid membrane is a useful and safe treatment option for vocal nodules. However, vocal nodules are caused mainly by excessive voice use; therefore, nodules can recur unless the voice use pattern changes. Further study of this treatment technique, including long-term follow-up, is needed.

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