Electrocochleografía con un electrodo extratimpánico en la membrana timpánica: valores de referencia dependientes de...

Área de la Ciencia:

• Otolaryngology
• Neuroscience
• Medical Diagnostics

Sus antecedentes:

• Electrocochleography (ECochG) is crucial for diagnosing inner ear conditions like Ménière's disease.
• Current extratympanic ECochG lacks age-specific reference values, hindering accurate clinical interpretation.
• Establishing these values is essential for precise diagnostic assessments.

Objetivo del estudio:

• To determine age-stratified reference ranges for summating potential (SP)/action potential (AP) amplitude and area ratios.
• To provide normative data for noninvasive ECochG in patients with suspected endolymphatic hydrops.
• To enhance the diagnostic utility of extratympanic ECochG.

Principales métodos:

• 47 ears from 26 healthy volunteers (aged 20-70 years) were studied.
• Extratympanic tympanic membrane electrodes were used for ECochG recordings.
• SP and AP potentials were measured, and amplitude/area ratios were calculated and analyzed by age and side.

Principales resultados:

• Established reference ranges (P5-P95): SP/AP amplitude ratio (0.13-0.46) and SP/AP area ratio (0.72-1.72).
• No significant differences were found between left and right ears.
• A slight, clinically insignificant age-related increase in both ratios was observed.

Conclusiones:

• Extratympanic ECochG provides a reliable, minimally invasive diagnostic method with age-stratified values.
• These reference values facilitate a more differentiated assessment of inner ear dysfunction.
• ECochG serves as a valuable adjunct to imaging in Ménière's disease diagnosis.