Neurowave Systems Inc.

516 Holdings

Thomas V Saliga

Tatjana Zikov

Stéphane Bibian

Bradley K Miller

The present invention herein is a method and apparatus that significantly limits the effect of high frequency ('HF') interferences on acquired electro-physiological signals, such as the EEG and EMG. Preferably, this method comprises of two separate electronic circuitries and steps or electronics for processing the signals. One circuit is used to block the transmission of HF interferences to the instrumentation amplifiers. It is comprised of a front-end active filter, a low frequency electromagnetic interference (“EMI”) shield, and an isolation barrier interface which isolates the patient from earth ground. The second circuit is used to measure the difference in potential between the two isolated sides of the isolation barrier. This so-called “cross-barrier” voltage is directly representative of the interference level that the instrumentation amplifier is subjected to. This circuit is used to confirm that the acquired signals are not corrupted by the interference.

Apparatus for acquiring biosignals in the presence of HF interference

Method and system for acquiring biosignals in the presence of HF interference

The present invention, herein is a method and apparatus that significantly limits the effect of high frequency ('HF') interferences on acquired electro-physiological signals, such as the EEG and EMG. Preferably, this method comprises of two separate electronic circuitries and steps or electronics for processing the signals. One circuit is used to block the transmission of HF interferences to the instrumentation amplifiers. It is comprised of a front-end active filter, a low frequency electromagnetic interference ('EMI') shield, and an isolation barrier interface which isolates the patient from earth ground. The second circuit is used to measure the difference in potential between the two isolated sides of the isolation barrier. This so-called &#x201c;cross-barrier&#x201d; voltage is directly representative of the interference level that the instrumentation amplifier is subjected to. This circuit is used to confirm that the acquired signals are not corrupted by the interference.

The present invention, herein is a method and apparatus that significantly limits the effect of high frequency ('HF') interferences on acquired electro-physiological signals, such as the EEG and EMG. Preferably, this method comprises of two separate electronic circuitries and steps or electronics for processing the signals. One circuit is used to block the transmission of HF interferences to the instrumentation amplifiers. It is comprised of a front-end active filter, a low frequency electromagnetic interference ('EMI') shield, and an isolation barrier interface which isolates the patient from earth ground. The second circuit is used to measure the difference in potential between the two isolated sides of the isolation barrier. This so-called 'cross-barrier' voltage is directly representative of the interference level that the instrumentation amplifier is subjected to. This circuit is used to confirm that the acquired signals are not corrupted by the interference.

Method and system for acquiring biosignals during delivery of anesthesia or sedation in the presence of HF interference

Electronic equipment is provided for playing a bingo-like game in a fashion closely simulative of the well known game of bingo played with paper cards. The three main functional components are: a) a central computer that is used both to determine which sets of faces are downloaded into players' game boards and to reconcile cash received by a salesperson with the number of downloaded games authorized to be played; b) players' game boards, each of which is adapted to receive enabling messages from a sales unit, to display enabled sets of playable indicia simulative of a bingo card and to modify that display responsive to a player's input; and c) the sales unit, which is adapted both to send an enabling message to a player's game board responsive to a manual input from a salesperson, and to record each such enabling transaction for later upload to the central computer. Another feature of the system is a switching arrangement for controlling a LCD display in a manner simulative of the use of a conventional ink dauber in marking a paper bingo card. This may be done by using a permanent magnet disposed on a simulative dauber that cooperates with a Hall-effect, or other, magnetic field sensor disposed behind an LCD display cell.

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Odessa, FL, United States of America

Thomas V Saliga