Author/Editor		Grgič, M; Konec, B; Mihelin, M; Zidar, I
Title		Electroretnographic system
Type		članek
Source		Zdrav Vestn
Vol. and No.		Letnik 62, št. Suppl 1
Publication year		1993
Volume		str. 105-8
Language		eng
Abstract		At the University Institute of Clinical Neurophysiology in Ljubjana, the system for clinical retinography has been based for years on an old Medelec MSG machine connected with a photostimulator KAISER and internal normative data were used for the routine clinical use. In 1989, Standard for Clinical Electroretinography was published in the Archiues of Ophthalmology by the International Standardisation Committee. Five standard types of measurements were defined along with stimulation parameters types of electrodes and other acquisition parameters. In order to improve the measurement system and to adjust the laboratory to the proposed standards, a new acquisition system and a new stimulator were arranged. The acquisition system, based on an HP 9000 computer with apowerful analog-to-digital conversion system, standard computer peripheral units, and home written computer programmes, have proved to be a good solution. Medelec Ganzfeld BS-02 stimulator, triggered by the computer through its digital output card, was chosen. After the initial hardware and software setup was made, a set of calibration measurements was done in order to achieve the parameters according to the proposed standard. New normative data are being gathered and concurrently analysed.
Descriptors		ELECTRORETINOGRAPHY REFERENCE STANDARDS