Journal article
The flow-volume loop in bilateral vocal cord paralysis.
- Bolliger CT Department of Internal Medicine, University Hospital, Basel, Switzerland.
- Sopko J
- Maurer P
- Soler M
- Perruchoud AP
- 1993-10-01
Published in:
- Chest. - 1993
Adult
Dyspnea
Humans
Laryngostenosis
Male
Maximal Expiratory Flow-Volume Curves
Spirometry
Time Factors
Trachea
Vocal Cord Paralysis
English
A 38-year-old man with posttraumatic bilateral vocal cord paralysis and a surgically repaired avulsion of the extrathoracic trachea presented with a slight increase of exertional dyspnea (grade 2). Spirometry showed high normal FEV1 for FVC variables, but the F-V loop was characteristic for highly variable UAO with an increased FEV1/PEF ratio of 11 ml/L/min as well as a MEF50/MIF50 of 4.55. Endoscopy during forced respiration showed near total inspiratory obstruction of the larynx due to paradoxical behavior of the vocal cords. In extrathoracic airway obstruction a FEV1/PEF ratio > 10 ml/L/min combined with a MEF50/MIF50 ratio > 4 is suggestive of variable UAO caused by bilateral vocal cord paralysis rather than by a tracheal lesion.
- Language
-
- English
- Open access status
- closed
- Identifiers
-
- DOI 10.1378/chest.104.4.1302
- PMID 8404221
- Persistent URL
- https://folia.unifr.ch/global/documents/204655
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