Amplitude scaling relationships of Burian-Allen, gold foil and Dawson, Trick and Litzkow electrodes. 1995

M P Hennessy, and Vaegan
Eye Clinic, Prince of Wales Hospital, University of New South Wales, Australia.

The bipolar Burian-Allen electrode represents the International Society for Clinical Electrophysiology of Vision standard for recording the electroretinogram. With prolonged recording there is a high risk of corneal abrasion from the electrode, while alternatives such as gold foil electrodes or fibers represent less risk. The standards require that alternative electrodes be demonstrated to give equivalent waveform and amplitudes. Electroretinograms were recorded with the bipolar Burian-Allen electrode and four alternative electrode configurations: a unipolar Burian-Allen electrode, a bipolar and monopolar gold foil electrode and a Dawson, Trick and Litzkow fiber electrode with all other recording conditions identical. The results represent a guide for comparisons of electroretinograms between studies using these electrodes. Recordings were made from two subjects for all five electrode configurations and six additional subjects with unipolar gold foil and bipolar gold foil electrodes alone. Flash stimuli over a range of intensities from full intensity to -1.5 log units were used. Recordings were repeated in the one session and on a subsequent session to provide test-retest reliabilities. Significant (p < 0.0001) differences in b-wave amplitude resulting from electrode type and intensity were demonstrated. The unipolar Burian-Allen and unipolar gold foil electrodes produced the greatest amplitude responses. The alternatives to the bipolar Burian-Allen electrode were equally or more reliable. The Dawson, Trick and Litzkow electrode produced lower-amplitude response than the bipolar Burian-Allen electrode but was the only one with significantly greater between-session reliability.

UI MeSH Term Description Entries
D010775 Photic Stimulation Investigative technique commonly used during ELECTROENCEPHALOGRAPHY in which a series of bright light flashes or visual patterns are used to elicit brain activity. Stimulation, Photic,Visual Stimulation,Photic Stimulations,Stimulation, Visual,Stimulations, Photic,Stimulations, Visual,Visual Stimulations
D012044 Regression Analysis Procedures for finding the mathematical function which best describes the relationship between a dependent variable and one or more independent variables. In linear regression (see LINEAR MODELS) the relationship is constrained to be a straight line and LEAST-SQUARES ANALYSIS is used to determine the best fit. In logistic regression (see LOGISTIC MODELS) the dependent variable is qualitative rather than continuously variable and LIKELIHOOD FUNCTIONS are used to find the best relationship. In multiple regression, the dependent variable is considered to depend on more than a single independent variable. Regression Diagnostics,Statistical Regression,Analysis, Regression,Analyses, Regression,Diagnostics, Regression,Regression Analyses,Regression, Statistical,Regressions, Statistical,Statistical Regressions
D012160 Retina The ten-layered nervous tissue membrane of the eye. It is continuous with the OPTIC NERVE and receives images of external objects and transmits visual impulses to the brain. Its outer surface is in contact with the CHOROID and the inner surface with the VITREOUS BODY. The outer-most layer is pigmented, whereas the inner nine layers are transparent. Ora Serrata
D004566 Electrodes Electric conductors through which electric currents enter or leave a medium, whether it be an electrolytic solution, solid, molten mass, gas, or vacuum. Anode,Anode Materials,Cathode,Cathode Materials,Anode Material,Anodes,Cathode Material,Cathodes,Electrode,Material, Anode,Material, Cathode
D004596 Electroretinography Recording of electric potentials in the retina after stimulation by light. Electroretinographies
D006046 Gold A yellow metallic element with the atomic symbol Au, atomic number 79, and atomic weight 197. It is used in jewelry, goldplating of other metals, as currency, and in dental restoration. Many of its clinical applications, such as ANTIRHEUMATIC AGENTS, are in the form of its salts.
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000704 Analysis of Variance A statistical technique that isolates and assesses the contributions of categorical independent variables to variation in the mean of a continuous dependent variable. ANOVA,Analysis, Variance,Variance Analysis,Analyses, Variance,Variance Analyses
D015203 Reproducibility of Results The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results. Reliability and Validity,Reliability of Result,Reproducibility Of Result,Reproducibility of Finding,Validity of Result,Validity of Results,Face Validity,Reliability (Epidemiology),Reliability of Results,Reproducibility of Findings,Test-Retest Reliability,Validity (Epidemiology),Finding Reproducibilities,Finding Reproducibility,Of Result, Reproducibility,Of Results, Reproducibility,Reliabilities, Test-Retest,Reliability, Test-Retest,Result Reliabilities,Result Reliability,Result Validities,Result Validity,Result, Reproducibility Of,Results, Reproducibility Of,Test Retest Reliability,Validity and Reliability,Validity, Face

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