摘要:
The invention relates to a device (2) for impedance measurement on body segments, having a current source (4), current changeover switches (3), current electrodes (8) that can be placed on the body segments, voltage changeover switches (10), and measuring electrodes (14). The outputs from the current source (4) are connected to inputs of the current changeover switches (3). Each current changeover switch (3) has a plurality of outputs that can be connected to the input of the respective current changeover switch (3). The outputs from the current changeover switches (3) are connected to electric feed lines (5) of the current electrodes (8). The measuring electrodes (14) detect voltage signals, which are used with the current supplied by the current source (4) for the impedance measurement of the segments. Switching devices (7) are incorporated in the feed lines (5), close to the current electrodes (8). By switching the current changeover switches (3) and switching devices (7), the device (2) respectively connects only two current electrodes (8) to the current source (4) and isolates all the other current electrodes (8) from the feed line (5) by switching the switching device (7), and the feed line (5) from the current source (4) by switching the current changeover switches (3).
摘要:
This disclosure provides isolation for a medical amplifier by providing a low impedance path for noise across an isolation barrier. The low impedance path can include a capacitive coupling between a patient ground, which is isolated from control circuitry, and a functional ground of an isolation system that is isolated from earth ground. The low impedance path can draw noise current from an input of an amplifier of patient circuitry.
摘要:
A sensor (12) designed to collect and convey single-site-related, body produced electrical and acoustic signals, such as those related to heart activity, where electrical electrode (24) and audio transducer (26) structures lie along a common axis (20). A portion of the electrical electrode structure forms an acoustic isolating shroud around the audio transducer.
摘要:
A measuring system (10) for measuring physiological parameters comprises a garment in the form of a sleeve or glove, or combination sleeve and glove, having a series of sensors (42) and a control unit (24) incorporated therewith. The control unit sleeve or glove and a sling (12) in combination with the measurement of numerous physiological parameters by effecting accurate placement of the sensors on a patient"s body.
摘要:
A system for reliably and accurately measuring the electrocardiographic waveform generated by a subject's cardiac muscle includes electrocardio electrodes that have multiple openings on their surfaces, a body contact determination circuit for determining if a subject is in physical contact with the electrocardio electrodes, a blow control circuit for causing air to flow out of the multiple openings of the electrocardio electrode when the subject is not in physical contact with the electrocardio electrodes and a suction control circuit for causing air to be sucked through the multiple openings of the electrocardio electrodes when the subject is in physical contact with the electrocardio electrodes. In a preferred embodiment, a pulse wave propagation velocity determining circuit is used to determine the propagation velocity of a subject's pulse wave.
摘要:
Die Vorrichtung umfaßt eine dreipolige Saugelektrode (1), die über einen Zuführungsschlauch (3) an einen Drucklufterzeuger und eine elektrische Zuleitung (4) an ein medizinisches Gerät anschließbar ist. Die aus einem Saugkopf (2), einer Saugglocke (6) und einer Strahldüse (5) bestehende mehrpolige Saugelektrode (1) zeichnet sich dadurch aus, daß die in den Saugkopf (2) eingeführte elektrische Zuleitung (4) für die Elektroden (10, 11, 12) in aus dem Saugkopf in den hohlen Innenraum (13) der Saugglocke (6) ragenden, feststehenden Anschlüssen (7, 8, 9) endet und daß die Elektroden durch männliche oder weibliche Steckelemente (14) mit den Anschlüssen beweglich verbindbar sind.
摘要:
An electrocardiogram electrode pad (9) has the elasticity and flexibility for covering an electrocardiogram electrode (14) which derives a weak current from the skin surface. The electrocardiogram electrode pad (9) has a bottom wall (10) to be held in contact with the skin and a side wall (11) extending from the edge of said bottom wall to be fitted on the electrode section (15) of the electrocardiogram electrode (14). The side wall has a greater thickness for its free end portion than for its intermediate and stem portions. The side wall also has a pinch portion (13) projecting from the free end to be grasped when fitting and removing the pad (9) with respect to the electrocardiogram electrode (14).
摘要:
The invention relates to an electrode intended, for example, for electrocardiogram examinations, and capable of being held in position by suction. Vacuum conditions are created through a hose or tube (8), through which a measuring conductor (7) is drawn. The electrode comprises an inflexible backpiece (3), an intermediate component (2) made of an elastomeric material, and an electrode plate (1), preferably made of a silver-coated plastics. The intermediate component (2) includes a relatively inflexible sealing ring (9) which, in the operative state of the electrode, supports against the skin of a patient via a sealing lip (13) and against the opposing side of the backpiece (3). The electrode plate (1) is firmly connected to the backpiece, while the sealing ring carried by the intermediate component (2) is movable and can be readily sprung away from the backpiece (via resilient means 17). When no load is exerted on the lip-side of the ring and the ring is thus urged outwardly, a vacuum valve is closed automatically through the intermediate component (2), and is re-opened when the electrode is pressed against the surface of the skin, whereupon the electrode is held firmly by suction.
摘要:
A suction-attachment structure includes an electrically conducting unit and a suction-attaching member. The suction-attaching member includes a base. The base has an edge from which a wall extends. The wall has an upper end forming an attaching face. The electrically conducting unit is coupled to the base of the suction-attaching member. The attaching face formed at the upper end of the wall defines a suction-attaching configuration to allow the suction-attaching member to securely hold the electrically conducting unit in position. As such, the electrically conducting unit is prevented from displacing during an operation of detection and contact engagement with a surface layer of a human body can be securely maintained for carrying out detection of physiological signals.