Robert L Addiss

US Patent:

54820499, Jan 9, 1996

Filed:

Mar 16, 1994

Appl. No.:

8/214345

Inventors:

Robert R. Addiss - Bedford MA
Stephen E. Gordon - Cambridge MA
Stephen J. Staats - Wenham MA

Assignee:

Siemens Medical Systems, Inc. - Iselin NJ

International Classification:

A61B 500

US Classification:

128673

Abstract:

An electronic labeling and display system for displaying a user defined label created once by the user at a display monitor location and displayed at the remote sensing location and a display monitor.

US Patent:

59149914, Jun 22, 1999

Filed:

Jun 30, 1997

Appl. No.:

8/884857

Inventors:

Scott Gigandet - Groveland MA
John F. Sullivan - Beverly MA
Robert Addiss - Westford MA

Assignee:

Siemens Medical Systems, Inc. - Iselin NJ

International Classification:

H04L 700

US Classification:

375355

Abstract:

Apparatus for synchronizing a reference clock signal received from a host system with an A/D converter clock signal generated in a data acquisition pod. The pod includes a decoder responsive to communication received from the host for extracting a host reference signal, and a clock signal source for developing an A/D reference clock signal having a frequency that is different from the frequency of the host reference signal. A pulse modifying digital phase-locked loop (PLL) is responsive to the A/D reference clock signal and the host reference signal for developing an A/D clock signal for an A/D converter in which one of its clock periods is periodically modified, thereby locking the rate at which the A/D converter develops samples to the rate at which the host system requests samples. In a preferred embodiment the pod also includes a signal detector for detecting a specified alignment in time of the readiness of the A/D converter to provide a given sample with a host system request for that given sample, and upon such detection, selectively providing an enable signal to the PLL, thereby enabling operation of the PLL and synchronizing the host and pod clock rates, as well as locking in a given alignment the providing to the host of the samples developed by the A/D converter with the host system requests for those samples.

US Patent:

56239386, Apr 29, 1997

Filed:

Sep 29, 1995

Appl. No.:

8/537175

Inventors:

Robert R. Addiss - Westford MA

Assignee:

Siemens Medical Systems, Inc. - Iselin NJ

International Classification:

A61B 508

US Classification:

128723

Abstract:

An apparatus for monitoring the expansion and contraction of the thoracic cavity of a patient caused by respirations comprises, generating means for generating an AC examination current signal, coupling means for applying the examination current signal to the patient so that the examination current passes through the thoracic cavity of the patient, but at least a portion of the current does not pass through the thoracic cavity of the patient, detecting means coupled to the coupling means for detecting an amplitude modulated voltage signal developed across the patient in response to the application of the examination current and variation of the transthoracic impedance of the patient due to respiration, and current modifying means coupled with the generating means for modifying the AC examination current during application to the patient so that the portion of the examination current which does not pass through the patient is at least partially compensated.