A 52-year-old male presents with hoarseness of voice and weak cry lasting 3 weeks following thyroid surgery. Laryngoscopy reveals left vocal cord in paramedian position. Which is the drug of choice for medical management of this acute unilateral vocal cord paralysis?

Explanation

## Medical Management of Acute Vocal Cord Paralysis ### Pathophysiology Acute vocal cord paralysis following thyroid surgery results from recurrent laryngeal nerve (RLN) injury. The paralyzed cord assumes a paramedian position due to unopposed cricothyroid muscle action. Early intervention with corticosteroids aims to reduce inflammation and nerve edema, potentially facilitating nerve recovery. ### Drug of Choice: Corticosteroids **Key Point:** Corticosteroids (methylprednisolone or dexamethasone) are the first-line medical therapy for acute vocal cord paralysis, especially within the first 2–4 weeks of onset. **Mechanism:** - Reduce perineural edema and inflammation - Facilitate axonal regeneration - Improve chances of spontaneous recovery if given early - Typical regimen: methylprednisolone 1 mg/kg/day (max 80 mg) tapered over 2–4 weeks ### Timing and Efficacy | Intervention | Timing | Indication | Efficacy | |---|---|---|---| | Corticosteroids | Acute phase (< 4 weeks) | Post-surgical RLN injury | 60–70% recovery if early | | Voice therapy | Any phase | All VCP | Improves voice quality | | Botulinum toxin | Chronic (> 3 months) | Spasticity, hyperkinetic dysphonia | Symptom relief | | Vocal cord injection | Chronic (> 3 months) | Permanent paralysis | Medialization, voice improvement | **Clinical Pearl:** The "golden window" for corticosteroid efficacy is the first 2–4 weeks. Post-surgical RLN injuries have a 50–70% chance of spontaneous recovery within 6–12 months if the nerve is not transected. **High-Yield:** In post-thyroid surgery vocal cord paralysis, always rule out complete nerve transection (which requires surgical exploration) before starting medical therapy. If the nerve is intact, early corticosteroids + voice therapy are standard. ### Adjunctive Measures - Voice rest and voice therapy (essential) - Avoid smoking and irritants - Humidification - If no recovery by 6–12 months → consider vocal cord injection or medialization laryngoplasty [cite:Robbins & Cotran 10e Ch 16; Harrison 21e Ch 32]