Author/Editor		Brecelj, Jernej; Brvar, Miran
Title		Elektrofiziološka ocena funkcije mrežnice s fotopično in skotopično elektroretinografijo
Type		monografija
Place		Ljubljana
Publisher		Medicinska fakulteta
Publication year		1993
Volume		str. 38
Language		slo
Abstract		Background. The clinical electroretinogram is a flash-evoked potential of the retina recorded by surface electrodes. The electroretinography is a noninvasive and objective examination which has been - nonstandardised - in clinical practice for many years. International Society for Clinical Electrophysiology of Vision (ISCEV) wishes to standardise electroretinographic examination and had therefore published parameters, which should be considered in laboratories to record more comparable results. Aim of this study was to record first electroretinographic responses according to ISCEV standards at the University Institute for Clinical Electrophysiology, to test the recommended procedures and mode of examination with the elaboration of normative values. This will enable the laboratory to accept the standardised examination in its routine clinical practice. We also tested a new laboratory produced non-corneal HK-loop electrode. Methods. Electroretinograms (ERGs) were performed in 40 healthy volunteers and 12 patients with retinitis pigmentosa. As active electrodes we used non-corneal HK-loop electrodes. The preparation of patients as well as parameters of the electroretinographic system were adjusted according to the ISCEV standards. Results obtained in a group of volunteers produced normative electroretinographic data. The electroretinographic responses of patients with retinitis pigmentosa were compared with those obtained in healthy volunteers. Conclusions. The method proved to be efficient in electrophysiological evaluation of retinal function. Our volunteers and patients reported the non-corneal HK-loop electrode comfortable and we find it stable and sensitive enough for reliable flash ERG recording. Variability of the ERG signals recorded with HK-loop electrode was approximately in the same range as reported with corneal electrodes. (Abstract truncated at 2000 characters).
Descriptors		ELECTRORETINOGRAPHY RETINITIS PIGMENTOSA