Hewlett-packard Company

Susan R Hart

Peter M Galen

William E Saltzstein

Daniel J Powers

Jeffrey C Osborne

A portable data acquisition unit which features a sample order register which sets addresses in a multiplexer unit allowing one out of many electrical signals connected to the multiplexer to pass through at one time. The selected electrical signal is a sample which is transmitted to an A-to-D converter so that a digital signal is generated and passed to a communications port and then to a remote host device. A clock pulse increments the next address in the sample order list to the multiplexer to establish the next signal sample to be transmitted to the host device. At the host device, the original electrical signals may be reconstituted. For example, the electrical signals may be physiological signals derived from transducers associated with an EKG. The host device may be a remote EKG apparatus.

Portable data acquisition unit

Method and apparatus for acquiring and processing EKG signals. A plurality of electrodes for measuring a patient's cardiac electrical signals provide analog electrode signals to an analog-to-digital converter via a plurality of electrode wires. The analog-to-digital converter converts the analog electrode signals to corresponding digital electrode signals which are then combined into combined signal leads.

Biophysiological data acquisition including lead combination

A portable leadwire signalling terminal is provided as an interface between an EKG base unit and a patient. The portable terminal includes a signal transceiver which transmits leadwire information to the EKG apparatus, as well as pushbutton information. The EKG unit sends back information suitable for a video display in the terminal. This information is indicative of noise on each leadwire, as well as whether a lead wire is disconnected.

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McMinnville, OR, United States of America

Susan R Hart