Method and device for measuring physiological parameters at the wrist

• US 7,598,878 B2
• Filed: 12/10/2002
• Issued: 10/06/2009
• Est. Priority Date: 12/10/2001
• Status: Expired due to Fees

• Current Assignee: Medic4all AG
• Original Assignee: Medic4all AG
• Inventors: Goldreich, Rami
• Primary Examiner(s): Wu; Daniel
• Assistant Examiner(s): Tang; Son M
• Application Number:
  US10/497,169
• Publication Number:
  US 20050116820A1
• Time in Patent Office: 2,492 Days
• Field of Search: 340/573.1, 600/300, 600/345, 600/500, 600/585, 600/301, 600/323, 600/340, 600/382, 128/903
• US Class Current: 340/573.1
• CPC Class Codes: A61B 2560/0209 adapted for power saving
• CPC Class Codes: A61B 2560/0271 using a remote monitoring unit
• CPC Class Codes: A61B 2562/02 Details of sensors specially adapted for in-vivo measurements
• CPC Class Codes: A61B 5/0002 Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network A61B5/07 takes precedence; transmission systems for measured values G08C; transmission H04B; transmission of digital information H04L; wireless communication networks H04W
• CPC Class Codes: A61B 5/0205 Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
• CPC Class Codes: A61B 5/02055 Simultaneously evaluating both cardiovascular condition and temperature
• CPC Class Codes: A61B 5/021 Measuring pressure in heart or blood vessels A61B5/0205 takes precedence
• CPC Class Codes: A61B 5/02438 with portable devices, e.g. worn by the patient
• CPC Class Codes: A61B 5/11 Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb for measuring pulse A61B5/02 ;A61B5/1038 takes precedence; motion detection to correct for motion artifacts in physiological signals A61B5/721
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/14551 for measuring blood gases
• CPC Class Codes: A61B 5/681 Wristwatch-type devices
• CPC Class Codes: G08B 21/04 responsive to non-activity, e.g. of elderly persons G08B21/06 takes precedence
• CPC Class Codes: Y10S 128/903 Radio telemetry

Abstract

A wrist-mounted device for measuring at least one physiological parameter of a subject. The present invention enables such a measurement to preferably be transformed into clinically useful information about the subject. Such information may then optionally be sent to medical personnel, for example at a contact and/or monitoring center, through a gateway device. The gateway device preferably communicates with the wrist-mounted device of the present invention through a wireless communication channel.

Claims

1. A system for measuring at least one physiological parameter of a subject, comprising:

(a) a fastening article for being fastened to the wrist of a first hand of the subject;

(b) a measuring device for measuring at least one physiological parameter of the subject, said measuring device configured to be attached to the wrist by said fastening article;

(c) three separate conductive areas on a surface of said measuring device, said conductive areas configured to measure electrical activity of the subject, said three conductive areas arranged in one of the following configurations;

(i) a first conductive area configured to be in contact with at least a portion of the wrist, second and third conductive areas configured to be touched by two fingers of a second hand of the subject;

(ii) first and second conductive areas configured to be in contact with at least a portion of the first hand and a third conductive area configured to be touched by a second hand of the subject;

(d) a processor for continuously receiving a signal from said measuring device and for continuously converting said at least one measurement to form medical information;

(e) a communication unit configured for at least continuously receiving said medical information from said processor and configured for at least continuously transmitting said medical information; and

(f) a mobile gateway device configured for at least receiving said medical information from said communication unit and for at least transmitting said medical information to a remote location;

wherein said system is configured to be carried by the subject;

wherein said physiological parameter includes an electrocardiogram (ECG) signal; and

whereby said ECG signal is extracted from said three conductive areas by using the signal of one conductive area as a reference and amplifying the differential voltage between the other two conductive areas.

2. The system of claim 1, wherein a rate of sampling determined by said processor is at least partially determined according to a type of physiological parameter being measured.

3. The system of claim 1, wherein at least one conductive area comprises an anvil.

4. The system of claim 1, wherein said physiological parameter is tonus activity.

5. The system of claim 1, wherein said the at least one physiological parameter is selected from a group consisting of heart rate;

regularity in heart rate;

breathing rate;

arrhythmia of the heart, and overall rhythm of the heart.

6. The system of claim 1, further comprising:

(e) a non-volatile memory for storing at least one instruction for execution by said processor.

7. The system of claim 1, wherein said communication unit also transmits a device identifier for uniquely identifying the device.

8. The system of claim 7, wherein said communication unit also receives data.

9. The system of claim 8, wherein said fastening article is a wristband.

10. The system of claim 9, further comprising a wire located at said wristband, wherein said wire is connected to said communication unit as an antenna.

11. A The system of claim 1

wherein said communication unit is configured for at least continuously transmitting data;

and

wherein said medical information is accessible to the subject, and wherein said medical information is selected from the group consisting of;

breathing rate, diastolic blood pressure, systolic blood pressure, level of sweat, oxygen saturation in the blood, glucose levels in the blood, tonus activity, Pulse Wave Transmit Time (PWTT).

12. The system of claim 1, wherein said remote location is further defined as a remote server in communication with said mobile gateway device.

13. The system of claim 12, wherein at least one of a communication link between said mobile gateway device and said remote server includes a telephone line.

14. The system of claim 1, wherein said transmitted data is analyzed at least partially automatically by said mobile gateway device.

15. The system of claim 1, wherein said measuring device and said mobile gateway device communicate bi-directionally, such that a message transmitted from said measuring device is acknowledged by said mobile gateway device, and such that if said mobile gateway device does not acknowledge correct reception of said message, said measuring device transmits said message again.

16. The system of claim 1, wherein at least one of a communication link between said measuring device and said mobile gateway device is selected from the group consisting of a wireless link and a wired link.

17. The system of claim 1, wherein said measuring device automatically performs a measurement of the physiological parameter upon manual activation of the measuring device by the subject.

18. The system of claim 17, wherein said data is automatically transmitted to said mobile gateway device upon said manual activation.

19. The system of claim 18 wherein, upon manual activation of the system by the subject, said physiological parameter is continuously converted to form medical information and said mobile gateway device continuously transmits said medical information.

20. The system of claim 1, wherein said measuring device automatically and periodically performs a measurement of the physiological parameter.

21. The system of claim 20, wherein at least one member of the group consisting of the frequency of said periodic measurement and the time period during which measurements are stored is modifiable.

22. The system of claim 20, wherein said data is automatically transmitted to said mobile gateway device if said measurement is outside of an acceptable range.

23. The system of claim 22, wherein said measurement is combined with another measurement of at least one other parameter to determine if said measurements are outside of said acceptable range.

24. The system of claim 1, wherein said mobile gateway device is configured for automatically receiving and relaying said medical information, wherein said medical information is relayed according to a packet format.

25. The system of claim 24, wherein said packet format is chosen from the group consisting of:

an Internet format, GPRS (general packet radio service), an SMS (Short Message Service) format, an MMS (Multi Media Service) format, electronic mail, and Internet based messaging.

26. The system of claim 1, wherein said at least one measurement is combined with at least one other measurement of said at least one physiological parameter.

27. The system of claim 1, wherein data for all said physiological parameters are transmitted according to a security protocol for maintaining the privacy of the user.

28. The system of claim 1, further comprising a real time clock for providing at least one time tag for said at least one measurement.

29. The system of claim 1, said measuring device further comprising a memory for storing said continuously measured physiological parameters, wherein said stored data is automatically transmitted to said mobile gateway device upon manual activation.

30. A method of measuring at least one physiological parameter of a subject, with the system of claim 1, including the steps of:

fastening the fastening article to the wrist of the first hand of the subject;

measuring at least one physiological parameter, including an electrocardiogram (ECG) signal, of the subject by a step chosen from the group consisting of;

i) measuring electrical activity of the subject at a first conductive area contacting at least a portion of the wrist, and measuring electrical activity at a second and a third conductive areas by touching by two fingers of a second hand of the subject;

ii) measuring electrical activity of the subject at the first and second conductive areas configured to be in contact with at least a portion of the first hand and a third conductive area configured to be touched by the second hand of the subject; and

iii) combinations thereof;

extracting the ECG signal from the conductive areas by using the signal of one conductive area as a reference and amplifying the differential voltage between the other two conductive areas;

continuously sending a signal from the measuring device to the processor, the processor continuously converting the at least one measurement to form medical information;

continuously sending the medical information from the processor to the communication unit, the communication unit continuously transmitting the medical information to the mobile gateway device; and

the mobile gateway device transmitting the medical information to a remote location.

31. The method of claim 30, further including the step of, if a level of at least one of the physiological parameter and the medical information is outside of an expected range, continuously transmitting said medical information.

32. The method of claim 31, wherein said expected range is modifiable.