PHYSIOLOGICAL MONITORING SYSTEM

• US 3,960,140 A
• Filed: 02/18/1971
• Issued: 06/01/1976
• Est. Priority Date: 02/18/1971
• Status: Expired due to Term

• Current Assignee: Richard L. Buxton
• Original Assignee: Richard L. Buxton
• Inventors: Buxton, Richard L.
• Primary Examiner(s): Kamm, William E.
• Application Number:
  US05/116,588
• Time in Patent Office: 1,930 Days
• Field of Search: 128/2.06 A, 128/2.06 B, 128/2.06 E, 128/2.06 F, 128/2.06 G, 128/2.06 R, 128/2.06 V, 128/2.1 A, 128/2.1 E, 128/2.1 R
• US Class Current: 600/519
• CPC Class Codes: A61B 5/0006 ECG or EEG signals
• CPC Class Codes: A61B 5/02455 provided with high/low alarm devices
• CPC Class Codes: Y10S 128/903 Radio telemetry

Abstract

A physiological measurement system for electrically sensing heart activity of a plurality of patients and providing on a single display tube, divided into sections, one for each patient, composite displays consisting of an ECG waveform, a digital readout of heart rate, and permissible heart rate limits indicated by markers between which a heart rate marker is relatively positioned in terms of its value and the value of the limits.

Claims

1. A physiological monitoring system comprising:

A. first, second and third electrodes adapted to be positioned on the body of a patient;

B. a first amplifier adapted to amplify the output of said first electrode and assecond amplifier adapted to amplify the output of said second electrode;

C. an electrical system ground potential point common to said amplifiers;

D. bias means adapted to apply a fixed bias to said third electrode and a patient with respect to said ground potential point of said system;

E. sample and hold means responsive to the outputs of said first and second amplifiers with respect to said third electrode for converting a balanced output to a single ended output of pulses of a predetermined rate and of an amplitude proportional to the input of said sample and hold means;

F. analog to digital conversion means for encoding output pulses of said sample and hold means into discrete binary encoded words;

G. transmission means for transmitting the output of said analog to digital conversion means for display at a remote location; and

H. display means responsive to said output of said analog to digital conversion means for decoding electrical signals sensed by said first, second and third electrodes as physhological data and displaying said data.