Susan S Hart

US Patent:

52170209, Jun 8, 1993

Filed:

May 28, 1991

Appl. No.:

7/705841

Inventors:

William E. Saltzstein - McMinnville OR
Susan R. Hart - McMinnville OR
Peter M. Galen - McMinnville OR

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

A61B 50402

US Classification:

128696

Abstract:

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.

US Patent:

52244857, Jul 6, 1993

Filed:

May 28, 1991

Appl. No.:

7/706139

Inventors:

Daniel J. Powers - McMinnville OR
Jeffrey C. Osborne - McMinnville OR
Peter M. Galen - McMinnville OR
Susan R. Hart - McMinnville OR
William E. Saltzstein - McMinnville OR

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

A61B 504

US Classification:

128696

Abstract:

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.

US Patent:

50852248, Feb 4, 1992

Filed:

May 25, 1990

Appl. No.:

7/529015

Inventors:

Peter M. Galen - McMinnville OR
Susan R. Hart - McMinnville OR
William E. Saltzstein - McMinnville OR

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

A61N 50402

US Classification:

128696

Abstract:

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.