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Presentation & Red-Flag Screening
Breathy weak voice, weak cough, aspiration; screen for the aspiration and malignancy red flags that demand urgent evaluation and early intervention
Unilateral vocal fold paralysis presents with the consequences of glottic insufficiency: a breathy, weak, rough or raspy voice, reduced projection, vocal fatigue, running out of air while speaking, and reduced singing range in the professional voice user, together with the airway-protective failures — a weak cough, poor secretion clearance, choking on liquids, frank aspiration, and dyspnoea during speech. The voice complaint brings most patients in, but it is the airway and swallowing failure that determines urgency.
Before the routine work-up, the patient is screened for red flags. Aspiration red flags — aspiration pneumonia, severe aspiration, significant weight loss and recurrent chest infections — and the sinister features — progressive dysphagia or dyspnoea, multiple cranial-nerve deficits, a neck mass, haemoptysis, otalgia, rapidly progressive paralysis, and suspected malignancy — trigger urgent evaluation: FEES or videofluoroscopy, contrast-enhanced imaging, nutritional assessment, oncology or neurology consultation, and early vocal-fold augmentation. The cardinal principle is that aspiration, not dysphonia, is the strongest indication for urgent intervention — a paralysed fold that cannot protect the airway is an emergency, while an isolated breathy voice can be worked up routinely.
- Voice — breathy/weak/rough voice, reduced projection, vocal fatigue, air escape, reduced singing range
- Airway/swallow — weak cough, poor secretion clearance, choking on liquids, aspiration, dyspnoea on speech
- Red flags — aspiration pneumonia, severe aspiration, weight loss, recurrent chest infection; progressive dysphagia/dyspnoea, multiple CN deficits, neck mass, haemoptysis, rapidly progressive paralysis, suspected malignancy
- Red flags → urgent FEES/VFSS, contrast imaging, nutrition, oncology/neurology, early augmentation
★ High-yield pearls (chapter-wide)
- All vocal fold paralysis requires laryngoscopic confirmation — the diagnosis is made by visualising the immobile fold, its position and its structural changes, not inferred from the voice alone.
- Most unilateral vocal fold paralysis is iatrogenic until proven otherwise — surgical injury (thyroid, cardiac, thoracic and neck operations) accounts for over half of cases, so the surgical history is the highest-yield part of the work-up.
- Image the entire vagus and recurrent-laryngeal-nerve pathway when no obvious cause exists — contrast CT from skull base to mediastinum and lung apex, with the right side imaged to the thoracic inlet and the left to the aortic arch.
- Aspiration — not dysphonia — is the strongest indication for urgent intervention; aspiration pneumonia, severe aspiration and weight loss demand FEES or videofluoroscopy and early augmentation, not a wait-and-see approach.
- Laryngeal electromyography is most useful between about six weeks and five months after onset — it confirms neurogenic paralysis, distinguishes it from arytenoid dislocation or joint fixation, and prognosticates recovery from the pattern of denervation and reinnervation.
- Early injection augmentation in recent-onset paralysis often improves voice outcomes, reduces maladaptive supraglottic compensation, and may reduce the later need for framework surgery.
- Match the procedure to the glottic gap — a small median/paramedian gap suits injection, a moderate gap suits medialisation thyroplasty, a posterior gap needs arytenoid adduction, and a large gap with fold shortening needs combined thyroplasty and arytenoid adduction.
- Combined medialisation thyroplasty and arytenoid adduction is the surgical gold standard for permanent paralysis with significant glottic insufficiency — it corrects position, bulk, the posterior gap and the vertical mismatch together.
- Consider laryngeal reinnervation in younger patients with a long life expectancy and stable paralysis — it restores tone and prevents atrophy, at the cost of a delayed (6–12-month) effect.
- Outcome assessment is multidimensional — patient-reported (VHI-10, EAT-10, Dyspnea Index), perceptual (GRBAS, CAPE-V), acoustic, aerodynamic and endoscopic measures together, not the voice alone.
Evidence base
2 sources- HIGH
Marques JAS, Marronnier A, Crampon F · J Voice · 2021ReviewPMID 32253078
Updated review of the early management of acute unilateral vocal fold paralysis, including presentation and the rationale for early intervention.
- MOD
Ortega Beltrá N, Martínez Ruíz de Apodaca P, Matarredona Quiles S · Acta Otorrinolaringol Esp (Engl Ed) · 2022Journal articlePMID 36228989
Study of extralaryngeal causes of unilateral vocal cord paralysis, framing the aetiologic spectrum and the red flags that point to a sinister cause.
Decision tree
Laryngoscopy confirms the immobile fold. The aspiration/malignancy red-flag screen exits urgently; otherwise the vagus/RLN pathway is imaged and LEMG prognosticates, routing the patient down the management ladder matched to the glottic gap.