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[Simplified electroretinography protocol and diagnosis of retinal dystrophies in children]
S D Dhellemmes1, F Vincent, C Arndt
1Service d'explorations fonctionnelles de la vision, Hôpital R. Salengro, CHRU de Lille.
Insights
A simplified electroretinogram (ERG) effectively diagnoses pediatric photoreceptor dystrophies. This non-sedated method reliably identifies conditions like Leber congenital amaurosis and rod-cone dystrophy in young children.
Area of Science:
- Ophthalmology
- Pediatric Neurology
- Medical Diagnostics
Context:
- Pediatric visual impairment diagnosis presents challenges due to patient cooperation.
- Electroretinography (ERG) is crucial for assessing retinal function.
- Sedation-free ERG methods are needed for young children.
Purpose:
- To evaluate a simplified, non-sedated electroretinogram (ERG) for diagnosing visual disorders in children under six.
- To assess the reliability of ERG in identifying various pediatric retinal dystrophies.
Summary:
- A simplified ERG protocol using corneal electrodes and a light-emitting diode stimulator was performed on 124 children under six.
- Recordings were made in awake, non-sedated children after light adaptation and dark adaptation.
- The method successfully diagnosed photoreceptor dystrophies, including Leber congenital amaurosis and X-linked pigmentary retinopathy, differentiating them from other retinal conditions.
Impact:
- This simplified ERG facilitates reliable diagnosis of pediatric retinal dystrophies without sedation.
- It aids in distinguishing functional retinal impairments from structural retinal diseases.
- Enables earlier and more accurate diagnosis of inherited retinal disorders in young children.
Purpose:
To report results of a simplified electroretinogram in children.
Patients:
124 children under 6 years of age with nystagmus, blindness, neurological disease, cone rod dystrophy in the family, or abnormal fundus appearance were examined.
Method:
The electroretinogram was recorded by corneal electrodes in an awake state without sedation. A light-emitting orange diode stimulator was used. Stimulation was performed subsequently after 3 minutes of light adaptation and after 8 minutes of darkness. If the electroretinogram was abnormal, a second recording was done a few weeks later using the same method. In some cases, the children were re-examined, and a ganzfeld stimulation ERG was recorded.
Results And Discussion:
This method allowed a reliable diagnosis of photoreceptor dystrophy: Leber's congenital amaurosis with or without rare metabolic diseases, X link pigmentary retinopathy or retinal dystrophy with general disease in children. It helped to differentiate isolated retinal pigment changes with normal electroretinogram from functional retinal impairment and rod-cone dystrophy from other retinal dystrophies.