Patent ID: 9155486
Filing Date: 2015-10-13
Classification: A61B

Abstract:
1. A sensing device for contact with brain tissue comprising: a flexible support sleeve having an outer surface and inner surface defining a cavity; at least one annular macroelectrode sensing element secured with respect to and around the outer surface and having a macroelectrode brain-contact surface; a lead wire secured to each macroelectrode sensing element and extending into and along the cavity; at least one microelectrode sensing element secured with respect to the macroelectrode sensing element and having a microelectrode brain-contact surface completely surrounded by the macroelectrode brain-contact surface; and an insulated micro-wire secured to each microelectrode sensing element and extending into and along the cavity, the micro-wire being insulated along its entire length with a bio-compatible material to prevent electrical interaction between the microelectrode sensing element and the macroelectrode sensing element, the macroelectrode brain-contact surface and the microelectrode brain-contact surface being in substantially the same curved surface to abut brain tissue for monitoring, wherein the microelectrode sensing element is adapted to monitor cellular neuron activity signals within the brain, while the macroelectrode sensing element is adapted to monitor EEG brain activity signals from the brain.