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Related Experiment Videos

Masqueraders in clinical allergy: laryngeal dysfunction causing dyspnea.

M T O'Hollaren1

  • 1Oregon Health Sciences University, Portland.

Annals of Allergy
|November 1, 1990
PubMed
Summary

Laryngeal disorders, including paradoxical vocal cord motion (PVCM), can cause refractory dyspnea mimicking asthma. Early diagnosis and treatment with speech therapy are crucial for managing these conditions.

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Area of Science:

  • Pulmonology
  • Otolaryngology
  • Allergy and Immunology

Background:

  • Refractory asthma is a common diagnostic challenge for allergists.
  • Some patients presenting with dyspnea may have underlying laryngeal dysfunction.
  • Understanding laryngeal anatomy and physiology is key to diagnosing laryngeal disorders.

Purpose of the Study:

  • To highlight laryngeal disorders as a cause of refractory dyspnea.
  • To differentiate laryngeal causes of dyspnea from typical asthma.
  • To emphasize the importance of recognizing conditions like paradoxical vocal cord motion.

Main Methods:

  • Review of clinical presentations of patients with dyspnea.
  • Discussion of diagnostic criteria for laryngeal disorders.
  • Comparison of symptoms and diagnostic findings in asthma versus laryngeal dysfunction.

Main Results:

  • Paradoxical vocal cord motion (PVCM) can cause severe subjective dyspnea without hypoxia.
  • Methacholine challenge tests are typically negative in patients with PVCM.
  • PVCM often affects females, may be linked to the medical profession, and can be associated with psychologic difficulties.

Conclusions:

  • Laryngeal dysfunction, including PVCM, should be considered in patients with refractory dyspnea.
  • Accurate diagnosis requires awareness of conditions like PVCM, Meige syndrome, abductor spastic dysphonia, and laryngospasm.
  • Speech therapy and psychotherapy are foundational treatments for PVCM.

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