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Full-field ERG responses recorded with skin electrodes in paediatric patients with retinal dystrophy
S P Meredith1, M A Reddy, L E Allen
1Ophthalmology Department, Addenbrooke's Hospital, Cambridge, UK.
Insights
Electroretinography (ERG) using skin electrodes successfully diagnosed retinal dystrophies in children. This method accurately identified specific abnormalities, aiding in the diagnosis of various retinal conditions.
Area of Science:
- Ophthalmology
- Neuroscience
- Genetics
Background:
- Retinal dystrophies are a group of inherited eye diseases that affect photoreceptor cells.
- Accurate diagnosis is crucial for management and genetic counseling.
- Traditional electroretinography (ERG) can be challenging in pediatric patients.
Observation:
- This study evaluated the efficacy of electroretinography (ERG) using skin electrodes in pediatric patients diagnosed with retinal dystrophies.
- ERG responses were recorded in 43 children with retinal dystrophy and 17 healthy children, aged 4-14 years.
- Stimuli used were consistent with the International Society for Clinical Electrophysiology of Vision (ISCEV) standard.
Findings:
- All patients with retinal dystrophy exhibited abnormal ERG responses.
- The recorded ERG abnormalities correlated well with clinical findings in most cases.
- Specific patterns of abnormality were observed for rod-cone dystrophy, cone dystrophy, rod monochromatism, congenital stationary night blindness (CSNB), and X-linked retinoschisis (XLRS).
Implications:
- Skin electrode ERG is a viable and successful method for assessing pediatric retinal dystrophies.
- This non-invasive technique can aid in the differential diagnosis of various inherited retinal diseases.
- Findings support the use of skin electrode ERG as a valuable diagnostic tool in pediatric ophthalmology.
Purpose:
Assess ERG responses recorded with skin electrodes in children with retinal dystrophies.
Method:
ERG responses were recorded using skin electrodes in 17 healthy children and 43 paediatric patients with retinal dystrophy. Subjects were aged 4-14 years. ERG responses were recorded to full-field stimuli similar to those recommended in the ISCEV standard. The type of retinal dystrophy was classified on the basis of standard clinical criteria and the ERG responses were compared with those of the age-matched controls.
Results:
ERG responses were abnormal in every patient. The specific type of ERG abnormality was also consistent with the clinical findings in the majority of patients. Rod responses were abnormal in every patient with a rod-cone dystrophy and cone responses were also abnormal in the majority of patients. Those patients with cone dystrophy or rod monochromatism had normal or near normal rod responses but sub-normal or absent cone responses. Patients with CSNB or XLRS had a sub-normal b-wave but normal amplitude a-wave.
Conclusion:
ERGs can be recorded successfully with skin electrodes in paediatric patientsand responses can aid the diagnosis of the type of retinal dystrophy.
