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[Validity of videolaryngoscopy in detecting laryngeal structural changes]
J L Pardal Refoyo1, C Muñoz Navarro
1Servicio de Otorrinolaringología, Hospital Virgen de la Concha, Insalud, Zamora.
Anales Otorrinolaringologicos Ibero-Americanos
|January 1, 1996
Summary
Videolaryngoscopy shows lower sensitivity and negative predictive value compared to indirect laryngoscopy for diagnosing laryngeal diseases. Direct laryngoscopy remains essential for confirming organic lesions.
Area of Science:
- Otolaryngology
- Diagnostic Imaging
Background:
- Dysphonia affects numerous patients, necessitating accurate laryngeal disease diagnosis.
- Indirect laryngoscopy with a laryngeal mirror is a traditional diagnostic tool.
- Videolaryngoscopy offers an alternative visualization method for laryngeal structures.
Purpose of the Study:
- To evaluate the diagnostic validity of videolaryngoscopy compared to indirect laryngoscopy for laryngeal diseases.
- To assess the performance of videolaryngoscopy in identifying organic laryngeal lesions.
Main Methods:
- A retrospective study analyzed 267 patients with dysphonia over two years (1992-1993).
- Patients underwent indirect laryngoscopy and videolaryngoscopy.
- Patients with suspected organic lesions also had direct laryngoscopy, biopsy, and histopathological examination.
Main Results:
- Videolaryngoscopy demonstrated a relative sensitivity of 0.4 and a negative predictive value of 0.26 compared to indirect laryngoscopy.
- Correlation between videolaryngoscopy and direct laryngoscopy results was 1.
- Direct laryngoscopy confirmed organic lesions in 154 out of 156 patients.
Conclusions:
- Videolaryngoscopy has lower sensitivity and negative predictive value than indirect laryngoscopy for diagnosing laryngeal diseases.
- Indirect laryngoscopy remains crucial for diagnosing organic laryngeal lesions.
- Direct laryngoscopy is indispensable for definitive diagnosis and must precede microlaryngoscopy.