A low‐cost method for simultaneous video‐recording of ambulant subject and electroencephalograph: the Quarrier's system*

Abstract

ABSTRACT. A system is described by means of which the ambulant subject may be video‐filmed over several hours with the electroencephalograph superimposed on the same tape, allowing correlations to be observed in the active state. Our first subjects have been girts with Rett syndrome. Requirements are: one portable video camera/recorder, a conventional e.e.g. machine, the ‘Medilog 9000’ system for prolonged ambulatory recording (Oxford Medical), a specialized video mixer (videogram For AFVG600, commercially available) a video timer, a conventional video casette recorder and a television monitor. The cost is small for a department already equipped to carry out ordinary ambulatory e.e.g. monitoring. The method is safe, well tolerated, simple to use and adaptable. To the best of the authors’ knowledge, they are the first to use this system and they believe that it should find wider application when it is desirable to correlate the behaviour of a subject with physiological parameters, on a restricted budget.

Development, evaluation and implementation of video-EEG telemetry at home

“…3,4 In another study, simple improvisation was used to combine a conventional ambulatory EEG system with a portable video camera set up in the patient's home, with offline combining of the EEG and video for simultaneous viewing. 5 A case study reported the benefit of home recording for monitoring the patient's treatment. 6 Probably the best-established system combines EEG and video into a single portable unit taken by the patient to their home, after EEG connection in the clinic 7 ; however, this system differs from our described here in that it is ''unattended'' -that is, there is no professional staff involvement in the patient's home, whereas we describe here an ''attended'' system, with professionals visiting the patient's home during monitoring.…”