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Full-field electroretinography under general anesthesia in retinoblastoma.
MedLine Citation:
PMID:  23288585     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
PURPOSE: To investigate the electrical responses of the retina in retinoblastoma (RB), by recording full-field electroretinography (ERG) under general anesthesia. METHODS: The ERG was recorded using Ephios hand-held portable ERG system, according to International Standards for Clinical Electrophysiology of Vision. Forty-eight eyes of 43 cases and 33 eyes of 33 controls were enrolled. The cases were classified based on international intraocular retinoblastoma classification (IIRC). Forty-eight eyes of cases were divided into 30 cases with active RB and 18 cases with regressed RB. RESULTS: The amplitudes of a- and b-waves were decreased as compared to controls in all subgroups. The implicit times of all RB patients from group A to C differed statistically from controls (p value < 0.05) except for single-flash rod response. The ERG waveforms in group E eyes were non-recordable. The comparison of ERG parameters between active and regressed groups (IIRC groups A and B) was statistically insignificant. Single case follow-up of unilateral RB after systemic chemotherapy showed improvement in amplitudes compared to baseline parameters. CONCLUSIONS: Reduced amplitudes and delayed implicit times were noted in advanced disease. The ERG of RB cases did not follow any specific pattern of waveform. ERG appears to be a dynamic parameter to observe changes following treatment for RB. Although ERG is not a diagnostic test for RB, it can be used as a complementary test to assess the residual retinal function in RB eyes.
Authors:
Ramya Sachidanandam; S Krishnakumar; Lingam Gopal; Joan M O'Brien; Vikas Khetan; Parveen Sen
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-4
Journal Detail:
Title:  Documenta ophthalmologica. Advances in ophthalmology     Volume:  -     ISSN:  1573-2622     ISO Abbreviation:  Doc Ophthalmol     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-4     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0370667     Medline TA:  Doc Ophthalmol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Department of Optometry, Medical Research Foundation, No. 18, College Road, Nungambakkam, Chennai, 600 006, Tamil Nadu, India, parveensen@gmail.com.
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