Abstract: A non-invasive apparatus and method for monitoring the blood pressure of a subject detects a pulse signal at both a first and second location on the subject's body The elapsed time between the arrival of corresponding points of the pulse signal at the first and second locations is determined. Blood pressure is related to the elapsed time by relationships such as: P=a+b ln(T), where a and b are constants dependent upon the nature of the subject and the signal detecting devices.

Abstract: A non-invasive apparatus and method for monitoring the blood pressure of a subject detects a pulse signal at both a first and second location on the subject's body The elapsed time between the arrival of corresponding points of the pulse signal at the first and second locations is determined.

Abstract: A non-invasive apparatus and method for monitoring the blood pressure of a subject detects a pulse signal at both a first and second location on the subject's body. The elapsed time between the arrival of corresponding points of the pulse signal at the first and second locations is determined. Blood pressure is related to the elapsed time by relationships such as: P=a+b ln(T) where a and b are constants dependent upon the nature of the subject and the signal detecting devices. The system can be calibrated by measuring a single pair of reference blood pressure and corresponding elapsed time.

Abstract: A non-invasive apparatus and method for monitoring the blood pressure of a subject detects a pulse signal at both a first and second location on the subject's body. The elapsed time between the arrival of corresponding points of the pulse signal at the first and second locations is determined.

Abstract: An apparatus and method for monitoring conditions of living beings. A telemetry device includes a monitor which monitors at least one physiological condition of a patient. A transmitter transmits data including information on the condition and information identifying the device or patient. A separate receiver is provided for each device to receive the data transmitted. The receiver outputs signals to a processor. The processor extracts the information on the physiological condition and the information identifying the telemetry device. The processor outputs the information in a digital form to a display unit. The display unit displays the information on the physiological condition and the identifying information in a readable form. There is a separate display area for each telemetry device, whereby a plurality of patients can be monitored simultaneously on a real time or a near real time basis.

Abstract: A method and apparatus for monitoring electrical signals propagated through a living organism. A bipolar electrode is placed in contact with the tissue of the organism. Means is operatively connected to the electrode for performing a Hilbert transform on signals from the electrode. The individual electrodes of the bipolar electrode are preferably spaced-apart a distance d so as to satisfy the equation: .vertline..pi.Bd/v.vertline.<.pi./2. The Hilbert transform can be implemented by performing a Fourier transform on the signal, multiplying the signal by the imaginary number j, changing the sign of the signal at all negative frequencies, and then performing a reverse Fourier transform on the signal. The resulting signal is then displayed. Preferably brush tip electrodes are used for EMG signals although the method and apparatus is also applicable to needle electrodes.

Abstract: An electrode is used the connecting apparatuses to the skin surface of a living body. It includes a tube having an end and a plurality of hard, resilient wires extending outwardly from the end of the tube. The wires have splayed ends in a brush-tip-like arrangement having an end formed by the spaced-apart wires which is multi-pointed and abrasive.

Abstract: A biological electrode array connects electrical apparatuses to the skin surface of a living body. The array includes an insulating mount having a central area. A case is connected to the mount and has a cavity with conductive shielding extending thereabout. A plurality of shielding electrodes extend from the insulating mount and are spaced-apart about the central area. The shielding electrodes are electrically connected to the shielding of the case. A plurality of spaced-apart brush-tip electrodes extend from the central area of the mount. Signal buffers within the cavity of the case are electrically connected to the brush-tip electrodes. Conductors extend from the cavity, each conductor being electrically connected to one of the buffers. The brush-tip electrodes have thin, but resilient wires, typically of hard stainless steel or tungsten.