An instrument for time synchronisation of data stored by unrelated equipment, in the clinical neurophysiology environment

This paper discusses data synchronisation of different medical equipments, and whenever posterior analysis of the different kinds of data is required. Previous work to solve part of this problem was done by Gotman, Ives and Gloor. Their solution try to modulate the shape of the decimal digits (0,1,..9) using the referred galvanometers, and use these to record real time information on paper. Although adding an important extra information to paper EEG, this did not solve the main problem of time synchronisation between different instruments. The aim of the herein described instrument, is to provide an unified solution to the set of problems previously indicated. To achieve this, the instrument supplies the same centralised real time information to the three most common instruments found in these environments, in a form that can be directly used by them.