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    6.
    发明专利
    未知

    公开(公告)号：DE60223548T2

    公开(公告)日：2008-10-23

    申请号：DE60223548

    申请日：2002-07-03

    Applicant: ASPECT MEDICAL SYSTEMS INC

    Inventor： SHAMBROOM JOHN R ,  SMITH CHARLES P

    IPC: A61B5/308 ,  A61B5/276

    Abstract: A system for measuring bioelectric impedance in real time, in the presence of interference and noise is disclosed. A small electric current is injected into a biopotential electrode system, and then the measurement is tested for contamination by electrical interference or other noise sources.

    SISTEMA Y PROCEDIMIENTO DE MEDICION DE IMPEDANCIA BIOELECTRICA EN PRESENCIA DE INTERFERENCIAS.
    7.
    发明专利
    SISTEMA Y PROCEDIMIENTO DE MEDICION DE IMPEDANCIA BIOELECTRICA EN PRESENCIA DE INTERFERENCIAS. 未知

    公开(公告)号：ES2295399T3

    公开(公告)日：2008-04-16

    申请号：ES02763228

    申请日：2002-07-03

    Applicant: ASPECT MEDICAL SYSTEMS INC

    Inventor： SHAMBROOM JOHN R ,  SMITH CHARLES P

    IPC: A61B5/308 ,  A61B5/276

    Abstract: Un procedimiento para medir la impedancia bioeléctrica en un sistema de medición de biopotencial que incluye al menos dos electrodos (20a, 20b), comprendiendo dicho procedimiento las etapas de: medición de la impedancia bioeléctrica mediante la medición de un voltaje a la frecuencia de una señal de impedancia; cálculo del voltaje de ruido mediante la medición de un voltaje a una frecuencia discreta cercana a la frecuencia de dicha señal de impedancia; y determinación de la validez de la medición de la impedancia bioeléctrica mediante la comparación de dicha impedancia bioeléctrica medida frente a un valor umbral de impedancia de relación señal/ruido.

    CEREBRAL BIOPOTENTIAL ANALYSIS SYSTEM AND METHOD
    8.
    发明专利
    CEREBRAL BIOPOTENTIAL ANALYSIS SYSTEM AND METHOD 未知

    公开(公告)号：CA2191594C

    公开(公告)日：2005-09-20

    申请号：CA2191594

    申请日：1995-06-08

    Applicant: ASPECT MEDICAL SYSTEMS INC

    Inventor： CHAMOUN NASSIB G ,  SIGL JEFFREY C ,  SMITH CHARLES P

    IPC: A61B5/16 ,  A61B5/374 ,  G06F17/00 ,  G06F19/00 ,  A61B5/04

    Abstract: Disclosed is a system comprising a microcomputer (18), a user input device (24), a graphics display (20), a hard copy output device (22), a method to derive a diagnostic index indicative of a selected cerebra l phenomena which obtains (19) unipolar EEG signals in an acquisition, and an analysis system (12) from regions of interest on both th e left and right hemispheres of the brain of a subject (15). The system uses high gain low noise amplifiers to maximize the dynamic range for low energy wave components of the signals. Band-pass filtering is used to reduce noise and to avoid an alias. The system applies commonly used digital signal processing (DSP) techniques to digitize, to low pass filter (100Hz), and to decimate the signals. Power spectral, bi-spectral, and higher order spectral processing is then performed.

    9.
    发明专利
    未知

    公开(公告)号：BR0306712A

    公开(公告)日：2004-12-28

    申请号：BR0306712

    申请日：2003-01-06

    Applicant: ASPECT MEDICAL SYSTEMS INC

    Inventor： GREENWALD SCOTT D ,  SMITH CHARLES P ,  SIGL JEFFREY C ,  DEVLIN PHILIP H

    IPC: A61B5/16 ,  A61B5/374 ,  G06K9/00 ,  A61B5/00

    Abstract: The present invention is a system and method that produces features and indices that indicate the presence or absence of a disease or condition, or of the progression of a disease or condition. The system and method of the present invention also produce features and indices that predict responsiveness to medication from a premedication baseline. The system and method of the present invention further incorporates a testing methodology to improve the performance characteristics of the features or indices. To obtain such features and indices, time domain, power spectrum, bispectrum and higher order spectrum values are derived from biopotential signals taken from the subject being tested.

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