755 results about "Bio electricity" patented technology

A method and apparatus that use complex impedance measurements of tissue in human or animal bodies for the detection and characterization of medical pathologies is disclosed. An analysis of the complex impedance measurements is performed by a trained evaluation system that uses a nonlinear continuum model to analyze the resistive, capacitive, and inductive measurements collected from a plurality of sensing electrodes. The analysis of the impedance measurements results in the construction of a multidimensional space that defines the tissue characteristics, which the trained evaluation system uses to detect and characterize pathologies. The method and apparatus are sufficiently general to be applied to various types of human and animal tissues for the analysis of various types of medical pathologies.

Disclosed is an improved bioelectrical impedance gauge which is so designed that the high-frequency current flowing between two selected points in a living body may be detected in the vicinity of either selected point, and that the voltage appearing between two points selected in the current passage in which the high-frequency current flows may be applied to a high-impedance buffer circuit proximate to the two points selected in the current passage.

An electro-optic modulator modulates light in response to a life-form bio-potential to provide a bio-potential modulated light output. Modulation can be carried out as a result of capacitive coupling with the bio-potential. Phase, polarization, and intensity light modulation can be used. The light output can then be converted to electronic form for further processing. An optical power splitter is used to split light into multiple portions that are converted to electrical form. A pilot tone is used to achieve high sensitivity and synchronize multiple electro-optic modulators while phase modulation can be used to reduce noise in the bio-potential signal. Low-coherent light may be used as the light source. A housing is provided that can be hermetically-sealed and provided with electro-magnetic shielding.

The invention relates to a bioelectric electrode which is extensively applied to bioelectric recording, measurement and stimulation, including high-density electrode measurement, medical facilities, mobile equipments, family health care, psychological cognition, games, a brain-computer interface, rehabilitation training and the like, and is particularly applicable to electroencephalogram measurement. An electrode tip is a columnar pipe, and the middle part of the electrode tip is provided with an electrolyte circulating hole; one end of the electrode tip is a working end in contact with a living body, and the other end of the electrode tip is an electrolyte entering end; the electrode tip is located on one end plane of an electrode body; the middle part of the electrode body is provided with a cavity used for accommodating an electrolyte and communicating with a middle through hole; the electrode tip is a conductor, and the electrode body is either a conductor or an insulator; the electrode tip is communicated with an external circuit directly through the electrode body. The bioelectric electrode provided by the invention has the main advantages of being simple in structure, low and stable in electrode impedance, low in measurement noise, small in artifact, convenient and comfortable to use, and an electrolyte ion conductor and an electrode tip electronic conductor are simultaneously in contact with the skin, thereby being applicable to the relevant applications of bioelectricity recording, measuring and stimulation.

Methods and systems for neurostimulation and / or neurotelemetry of electrically-excitable biological tissue. Embodiments include implanting single or multiple semiconductor diodes and applying a high frequency electrical volume current. Neurostimulation embodiments include local rectification of the volume current by the diode, which can provide a pulsating electrical waveform capable of locally stimulating neural tissue, hi neurotelemetry embodiments, semiconductor diodes can be placed in contact with excitable tissue and a low level electrical carrier wave can be passed through the tissue and implanted diode whereby low level tissue bioelectric events intermodulate with the carrier wave and encode bioelectrical effects. Remote detection and amplitude demodulation of the volume-conducted carrier wave can allow recovery of the bioelectrical waveform and provide a neurotelemetry function, hi other embodiments, implanted diodes are placed in series with a pressure switch or piezoelectric material which enables their function only with the focal application of an acoustic pressure wave. This enables a selectivity amongst multiple diode channels by acoustic wave focusing or alternately by a process of range-gating of a surface applied electrical current to the arrival time of an acoustic wave at a particular device.

A wound care dressing is provided, including a hydrophobic base fabric, a plurality of electrode pairs, a plurality of hydrogel layers, and a waterproof thin film. The hydrophobic base fabric has a first surface and a second surface opposite to each other. The electrode pairs are arranged in an array and disposed on the first surface of the hydrophobic base fabric. The hydrogel layers are not in contact with one other, and each hydrogel layer covers a top surface and side walls of each electrode in the electrode pairs. After the hydrogel layers are in contact with a wound and absorb tissue fluid from the wound, the hydrogel layers form a restrictive electronic cycling channel with the electrode pairs to establish a plurality of bioelectric fields promoting wound healing on a surface of the wound. The waterproof thin film is disposed on the second surface of the hydrophobic base fabric.

The invention relates to a bio-electricity signal sensor. The bio-electricity signal sensor comprises an electrode, an electrolyte, a cavity capable of holding the electrolyte, and a porous column, wherein one end of the cavity is a sealed end, and the other end of the cavity is connected with an electrolyte entering end, and another end of the porous column is a working end in contact with a living body; at least a part of electrode is located in the electrolyte, the electrode is a conductor, and the cavity is either a conductor or an insulator. The bio-electricity signal sensor provided by the invention has the main advantages of being simple in structure, reliable to contact, precise to locate, low and stable in electrode-skin impedance, low in noise measurement, low in artifact and convenient and comfortable to use, and is capable of recycling for a long time, thereby being applicable to relevant applications of bioelectricity recording, measuring and stimulation, and particularly applicable to electroencephalogram measurement.