What is Vocal Cord Dysfunction?
- Definition: Paradoxical adduction (closure) of the vocal cords during inspiration (sometimes expiration), leading to airflow obstruction at the level of the larynx.
- Often mistaken for asthma but does not respond to bronchodilators.
???? Triggers
- Stress or anxiety
- Exercise (Exercise-Induced VCD)
- Irritants (smoke, fumes, perfumes)
- Post-nasal drip, reflux (GERD)
- Recent upper respiratory tract infection
???? Signs & Symptoms
- Sudden onset of:
- Inspiratory stridor (vs. expiratory wheeze in asthma)
- Throat tightness
- Shortness of breath
- Hoarseness or voice changes
- Feeling of “air hunger”
- Often resolves quickly after the episode
❌ Not Typical of Asthma
- Normal oxygen saturation
- Clear lungs on auscultation
- Poor response to asthma meds
- Normal pulmonary function tests outside of episodes
???? Diagnosis
- Laryngoscopy during symptoms (gold standard): Shows paradoxical vocal cord motion.
- Pulmonary Function Tests: May show flattening of inspiratory loop on flow-volume loop.
- Often a clinical diagnosis when characteristic features are pr
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