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Related Experiment Videos

Functional stridor diagnosed by the anaesthetist.

G Tousignant1, S J Kleiman

  • 1Department of Anaesthesia, Sir Mortimer B. Davis-Jewish General Hospital, McGill University, Montreal, Quebec, Canada.

Canadian Journal of Anaesthesia = Journal Canadien D'Anesthesie
|March 1, 1992
PubMed
Summary

Functional stridor, a non-organic airway issue, can mimic severe stenosis. Anaesthetists can diagnose this condition, which presents with breathing difficulties and vocal changes, by excluding other causes.

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Area of Science:

  • Anesthesiology
  • Otolaryngology
  • Pulmonology

Background:

  • Stridor often indicates severe airway stenosis, necessitating urgent intervention.
  • However, non-organic causes of stridor exist, posing diagnostic challenges.

Observation:

  • Two cases of functional stridor diagnosed by anaesthetists are presented.
  • Symptoms include aphonia, dysphonia, dyspnoea, apnoea, or unconsciousness.
  • Inspiratory stridor, variable extrathoracic obstruction on flow volume loops, and normal vocal cord motion with inspiratory adduction on laryngobronchoscopy are noted.

Findings:

  • Functional stridor is characterized by normal airway anatomy but abnormal vocal cord adduction during inspiration.
  • Diagnosis relies on excluding organic, life-threatening airway stenosis.

Related Experiment Videos

  • Flow volume loops demonstrate a pattern of variable extrathoracic obstruction.

    • Implications:

    • Anaesthetists, as airway management experts, must recognize functional stridor.
    • Awareness can prevent unnecessary invasive procedures like tracheal intubation or tracheostomy.
    • Supportive treatment is indicated for functional stridor once organic causes are ruled out.