Body-worn vital sign monitor

Patent metadata

Field	Value
Publication number	US-11096596-B2
Application number	US-201916504798-A
Country	US
Kind code	B2
Filing date	Jul 8, 2019
Priority date	Sep 15, 2009
Publication date	Aug 24, 2021
Grant date	Aug 24, 2021

Abstract

The invention provides a body-worn monitor featuring a processing system that receives a digital data stream from an ECG system. A cable houses the ECG system at one terminal end, and plugs into the processing system, which is worn on the patient's wrist like a conventional wristwatch. The ECG system features: i) a connecting portion connected to multiple electrodes worn by the patient; ii) a differential amplifier that receives electrical signals from each electrode and process them to generate an analog ECG waveform; iii) an analog-to-digital converter that converts the analog ECG waveform into a digital ECG waveform; and iv) a transceiver that transmits a digital data stream representing the digital ECG waveform (or information calculated from the waveform) through the cable and to the processing system. Different ECG systems, typically featuring three, five, or twelve electrodes, can be interchanged with one another.

First claim

The invention claimed is:

1. A system for measuring vital signs and motion from a patient, comprising:
(a) a first module comprising a housing configured to be worn on the chest of the patient and an electrocardiogram (ECG) circuit and a three axis accelerometer contained within the housing, wherein (i) the ECG circuit is in electrical communication with at least three ECG leads and generates therefrom a time-dependent digital ECG waveform for each of the ECG leads and transmits the resulting time-dependent digital ECG waveforms as network packets comprising a header portion that indicates the origin of the packet, and a data portion, and (ii) the three axis accelerometer generates a time-dependent digital motion waveform for each of the three axes and transmits the resulting time-dependent digital motion waveforms as network packets comprising a header portion that indicates the origin of the packet, and a data portion; and
(b) a processing component comprising a housing configured to be worn on the patient's lower arm and a microprocessor and a serial transceiver within the housing and a display on a surface of the housing, wherein the processing component is configured to communicate with the first module to receive the network packets containing the time-dependent digital ECG waveforms and the network packets containing the time-dependent digital motion waveforms;
wherein the processing component communicates with the first module to transmit a timing synchronizing packet that is received and used by the first module to time-synchronize the network packets containing the time-dependent digital ECG waveforms and the network packets containing the time-dependent digital motion waveforms for processing by the processing component such that there is a maximum 40-microsecond timing error in the synchrony between the time-dependent digital ECG waveforms and the time-dependent digital motion waveforms, and
wherein the processing component is configured to display the time-dependent digital ECG waveforms and a motion state determined using the time-dependent digital motion waveforms on the processing component display.

2. The system of claim 1 , wherein the network packets containing the time-dependent digital ECG waveforms and the network packets containing the time-dependent digital motion waveforms are transmitted to the processing component over a single common cable.

3. The system of claim 2 , wherein the single common cable is terminated with a connector, and the processing component comprises an input port comprising a group of conductors configured to match conductors in the cable, and wherein the input port is configured so that the connector can be inserted into and detached therefrom.

4. The system of claim 2 , wherein the processing component comprises a plurality of functionally equivalent input ports such that the connector may operably connect the first module to the processing system by mating its connector to any one of the plurality of input ports.

Assignees

• Sotera Wireless Inc

Inventors

• Moon Jim
• Visser Ii Henk
• Hunt Robert Kenneth
• Mccombie Devin
• Dhillon Marshal Singh
• Banet Matthew J

Classifications

• A61B5/33

  specially adapted for cooperation with other devices · CPC title

• A61B5/321

  Accessories or supplementary instruments therefor, e.g. cord hangers · CPC title

• A61B5/08

  Measuring devices for evaluating the respiratory organs · CPC title

• A61B5/369

  Electroencephalography [EEG] · CPC title

• A61B5/0205

  Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition · CPC title