Lightweight, Portable EEG/Evoked Potential Device

A light-weight truly portable, multichannel electrophysiological system that provides featuresnecessary for full-scale, routine clinical EEG and evoked potential procedures (ranging from brainstemresponses to long latency ERPs) would find a wide range of applications in hospitals and medical servicecenters for easy-access bedside monitoring, field recording in residential sites, and recording inenvironments where either battery power or complete electrical isolation is necessary (e.g. intensive careunits). This type of device would thus make comprehensive outpatient evaluations and screeningfeasible. Because of the range of features and capacities, the new device will also be suitable for avariety of experimental applications in the same settings. In Phase I, a portable system will be developedthat will feature 24-high-gain EEG channels; 4-intermediate gain EOG/EMG; 4.single-ended instrumenta-tion inputs; 2-GSR (1-skin conductance level and 1-skin conductance response); 2-Auditory BrainstemResponse (ABR) channels (dedicated); 1-EKG (dedicated); 2-Impedance pneumograph; integratednotebook-type computer (20 MHz 80386 or higher) with high resolution VGA display; 450 MB of datastorage capacity; and an Integrated high-speed digital signal processor. Also provided are user-adjusta-ble analog and digital filtering, automatic impedance checking and automatic amplifier calibration. Theentire system will weigh less than 20 pounds with physical dimensions that approximate an attache caseand be capable of operating on battery power for approximately 7-8 hours. At a projected retail priceof approximately $18,000 (including notebook computer), the system would cost less than console-typedevices while providing similar functions and capacities.