Abstract:
A monitor apparatus for simultaneously monitoring via a telephone communication link electrocardiographic signals of a patient produced as a result of the heart function of the patient, and electrical artifact signals produced as a result of the electrical output of a heart pacer artificially stimulating the heart of the patient. The monitor apparatus includes a transducer adapted to sense both the electrocardiographic signals and the electrical artifact signals of a patient and to process the sensed signals to transmittable signals for transmission over the telephone communication link. The monitor apparatus also includes a receiver adapted to receive the signals transmitted over the telephone communication link and to process the received signals for providing a visual display to an observer of information indicative of the repetition rate of the electrical artifact signals and a recorded read-out indicative of the electrocardiographic signals along with the artifact signals and the time occurrence relationship of the artifact signals with respect to the electrocardiographic signals.
Abstract:
A receiver apparatus adapted to have coupled thereto intentionally transmitted signals, each being characterized as having a predetermined number of pulsations, which are transmitted over a communication link such as the standard switched telephone network and, at times, noise signals which are introduced into the communication link. The receiver includes measuring means arranged to measure the time interval between successive signals coupled thereto, and signal verification means to verify that each signal coupled to the receiver is either an intentionally transmitted signal or a noise signal. In the event that a noise signal is coupled to the receiver, the signal verification means is arranged to abort measurements of the measuring means. Measurements not aborted are indicative of the time interval between each two successive intentionally transmitted signals coupled to the receiver.
Abstract:
An emergency power supply is described comprising a switch and a low-level dropout circuit. The switch comprises a power transistor which provides power to the load from the battery and is driven by an amplifier. The low-level dropout supply circuit is a complementary bistable multivibrator which turns the switch off in going from a ''''conductive'''' state to a ''''nonconductive'''' state when the battery voltage drops to a predetermined level. There is also provided a delay-on timer which keeps the emergency lamp on for a selected period of time after external power restoration. In addition, a solid-state charger is provided to maintain a properly charged battery.
Abstract:
A monitor apparatus for simultaneously monitoring via a telephone communication link electrocardiographic signals of a patient produced as a result of the heart function of the patient, and electrical artifact signals produced as a result of the electrical output of a heart pacer artificially stimulating the heart of the patient. The monitor apparatus includes a transducer adapted to sense both the electrocardiographic signals and the electrical artifact signals of a patient and to process the sensed signals to transmittable signals for transmission over the telephone communication link. The monitor apparatus also includes a receiver adapted to receive the signals transmitted over the telephone communication link and to process the received signals for providing a visual display to an observer of information indicative of the repetition rate of the electrical artifact signals and a recorded read-out indicative of the electrocardiographic signals along with the artifact signals and the time occurrence relationship of the artifact signals with respect to the electrocardiographic signals.
Abstract:
A monitor apparatus for simultaneously monitoring via a telephone communication link electrocardiographic signals of a patient produced as a result of the heart function of the patient, and electrical artifact signals produced as a result of the electrical output of a heart pacer artificially stimulating the heart of the patient. The monitor apparatus includes a transducer adapted to sense both the electrocardiographic signals and the electrical artifact signals of a patient and to process the sensed signals to transmittable signals for transmission over the telephone communication link. The monitor apparatus also includes a receiver adapted to receive the signals transmitted over the telephone communication link and to process the received signals for providing a visual display to an observer of information indicative of the repetition rate of the electrical artifact signals and a recorded read-out indicative of the electrocardiographic signals along with the artifact signals and the time occurrence relationship of the artifact signals with respect to the electrocardiographic signals.
Abstract:
A monitor apparatus for simultaneously monitoring via a telephone communication link electrocardiographic signals of a patient produced as a result of the heart function of the patient, and electrical artifact signals produced as a result of the electrical output of a heart pacer artificially stimulating the heart of the patient. The monitor apparatus includes a transducer adapted to sense both the electrocardiographic signals and the electrical artifact signals of a patient and to process the sensed signals to transmittable signals for transmission over the telephone communication link. The monitor apparatus also includes a receiver adapted to receive the signals transmitted over the telephone communication link and to process the received signals for providing a visual display to an observer of information indicative of the repetition rate of the electrical artifact signals and a recorded read-out indicative of the electrocardiographic signals along with the artifact signals and the time occurrence relationship of the artifact signals with respect to the electrocardiographic signals.