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A classification scheme for paradoxical vocal cord motion
D A Maschka1, N M Bauman, P B McCray
1Department of Otolaryngology-Head and Neck Surgery, The University of Iowa College of Medicine, Iowa City, U.S.A.
The Laryngoscope
|November 22, 1997
Summary
Paradoxical vocal cord motion (PVCM) involves vocal cords inappropriately closing during inhalation, causing breathing difficulty. A new classification based on underlying causes aids diagnosis and tailored treatment for this complex condition.
Area of Science:
- Otolaryngology
- Neurology
- Speech-Language Pathology
Background:
- Paradoxical vocal cord motion (PVCM) is defined by inappropriate adduction of true vocal cords during inspiration.
- This condition leads to stridor and breathing difficulties due to vocal cord approximation.
- Current management is hindered by the absence of a comprehensive classification system for PVCM.
Observation:
- PVCM presents with mobile vocal cords that adduct abnormally during inhalation.
- Multiple etiological factors contribute to PVCM.
- Diagnostic evaluation involves assessing characteristic features and potential underlying causes.
Findings:
- A proposed classification categorizes PVCM by its etiology, including brainstem compression, upper/lower motor neuron injury, movement disorders, gastroesophageal reflux, and psychogenic causes (factitious disorder, somatization/conversion disorder).
- Case reports illustrate diagnostic approaches for PVCM.
- Management strategies are etiology-dependent, encompassing speech therapy, pharmacologic interventions, behavioral modification, and surgery.
Implications:
- Recognizing diverse PVCM causes enables otolaryngologists to develop targeted diagnostic and treatment plans.
- This classification system can improve patient outcomes by guiding appropriate interventions.
- Further research into the specific mechanisms of each PVCM subtype is warranted.