Abstract:
A method and apparatus for screening or sensing disease states, injury sites or bodily conditions in a human or animal subject by separately detecting the DC biopotential of the electromagnetic field at a plurality of test points in a test area. The DC biopotentials are converted by analog-to-digital converters (36, 38) connected to DC biopotential test sensors (12) at the test points into digital test signals, and the DC biopotential test sensors (12) and analog-to-digital converters (36, 38) form a biopotential sensing section (48) which is separate from a processing section (46) that receives and processes the test signals. Signals between the processing section (46) and the biopotential sensing section (48) are transmitted by a transmission network which electrically isolates the two sections. The conversions performed by the analog-to-digital converters (36, 38) are synchronized with the AC line frequency of the apparatus power supply (42), and the digital test signals are filtered in the processing section (46) by digital filters (68), each of which is dedicated to an individual DC biopotential test sensor (12).
Abstract:
A DC biopotential sensing electrode assembly (106) is provided for an apparatus (10) for sensing DC biopotentials present at the skin of a subject. The electrodes (106) include an electroconductive medium (158) for transmitting ions from the skin which has a chloride content within a range of from 6-15 grams chloride ion per hundred grams of such medium. To reduce the corrosive effect of this electroconductive medium, each electrode includes only one metallic component (122, 144), and to provide an electrode with a low AC impedance, this metal is uniformly coated upon nonmetallic sensor (120) and terminal (142) bodies with a coating thickness within a range of from 0.5 to 1.5 mil. To pressure a complete electrical path through both the sensor and the terminal bodies, the nonmetallic portions (120, 142) are formed of conductive plastic.
Abstract:
The apparatus and method of screening and diagnosing trauma or disease in body tissues involves the use of DC bio-potential sensing electrodes (26) having DC offset potentials wihtin an acceptable range and electrical characteristics which enhance the accuracy of the bio-potential measurement. The apparatus (10) checks the electrodes (26) connected thereto prior to a measurement cycle and will not initiate the measurement cycle if improper electrodes are present. The electrodes (26) may be formed to selectively pass only certain ions thereby enhancing the sensitivity of the electrodes.
Abstract:
The present invention is a method and apparatus (10) for disease, injury or condition screening or sensing wherein bio-potentials are received from a plurality of measuring sensors (26a-d) located in the area of a suspected disease, injury or condition change site. These potentials are then processed by a processor (42), and the processed values are provided to a particular type of neural network (44) or a combination of neural networks uniquely adapted to receive and analyze data of an identifiable type to provide an indication (50) of specific conditions.
Abstract:
The electrode assembly includes at least one pre-gelled biopotential electrode having an electrolyte gel (26) in contact with the electrode element (24). An electrically conductive component (28) is removably mounted to electrically connect both the electrolyte gel and the electrode element conductor to complete a conductive bridge therebetween. The conductive element is inert relative to the electrolyte to avoid degradation of the electrolyte.