ADHERENT DEVICE WITH MULTIPLE PHYSIOLOGICAL SENSORS

• US 20140330136A1
• Filed: 07/02/2014
• Published: 11/06/2014
• Est. Priority Date: 09/14/2007
• Status: Abandoned Application

• Current Assignee: Medtronic Monitoring, Inc. (Medtronic Plc)
• Original Assignee: Corventis
• Inventors: AMURTHUR, Badri, LIBBUS, Imad, MANICKA, Yatheendhar D., BLY, Mark J., JAMES, Kristofer J., MAZAR, Scott T., WANG, Jerry S.
• Application Number:
  US14/322,676
• Publication Number:
  US 20140330136A1
• Time in Patent Office: Days
• US Class Current: 600/483
• CPC Class Codes: A61B 2560/0412 Low-profile patch shaped housings
• CPC Class Codes: A61B 2562/0215 Silver or silver chloride containing
• CPC Class Codes: A61B 5/0006 ECG or EEG signals
• 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 5/02405 Determining heart rate variability
• CPC Class Codes: A61B 5/02438 with portable devices, e.g. worn by the patient
• CPC Class Codes: A61B 5/02455 provided with high/low alarm devices
• CPC Class Codes: A61B 5/053 Measuring electrical impedance or conductance of a portion of the body
• CPC Class Codes: A61B 5/0535 Impedance plethysmography for measuring blood flow A61B5/0295
• CPC Class Codes: A61B 5/0537 Measuring body composition by impedance, e.g. tissue hydration or fat content
• CPC Class Codes: A61B 5/0806 by whole-body plethysmography measuring blood flow using plethysmography A61B5/0295; impedance plethysmography A61B5/053; measuring volume of the body or parts thereof A61B5/1073
• CPC Class Codes: A61B 5/0809 by impedance pneumography
• CPC Class Codes: A61B 5/0816 Measuring devices for examining respiratory frequency measuring frequency of electric signals G01R23/00
• 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 5/1116 Determining posture transitions
• CPC Class Codes: A61B 5/1118 Determining activity level
• CPC Class Codes: A61B 5/259 using conductive adhesive means, e.g. gels
• CPC Class Codes: A61B 5/282 Holders for multiple electrodes for introduction into the body A61B5/287
• CPC Class Codes: A61B 5/30 : Input circuits therefor
• CPC Class Codes: A61B 5/349 : Detecting specific parameters of the electrocardiograph cycle
• CPC Class Codes: A61B 5/361 : Detecting fibrillation
• CPC Class Codes: A61B 5/363 : Detecting tachycardia or bradycardia
• CPC Class Codes: A61B 5/366 : Detecting abnormal QRS complex, e.g. widening
• CPC Class Codes: A61B 5/443 : Evaluating skin constituents, e.g. elastin, melanin, water
• CPC Class Codes: A61B 5/4869 : Determining body composition
• CPC Class Codes: A61B 5/4875 : Hydration status, fluid retention of the body
• CPC Class Codes: A61B 5/6801 : specially adapted to be attached to or worn on the body surface
• CPC Class Codes: A61B 5/6833 : Adhesive patches
• CPC Class Codes: A61B 5/7275 : Determining trends in physiological measurement data; Predicting development of a medical condition based on physiological measurements, e.g. determining a risk factor
• CPC Class Codes: A61B 5/746 : Alarms related to a physiological condition, e.g. details of setting alarm thresholds or avoiding false alarms alarms per se G08B
• CPC Class Codes: A61B 7/00 : Instruments for auscultation
• CPC Class Codes: A61B 7/003 : Detecting lung or respiration noise
• CPC Class Codes: A61N 1/046 : Specially adapted for shock therapy, e.g. defibrillation
• CPC Class Codes: A61N 1/0476 : Array electrodes (including any electrode arrangement with more than one electrode for at least one of the polarities)
• CPC Class Codes: A61N 1/0492 : Patch electrodes A61N1/0412, A61N1/0428 take precedence
• CPC Class Codes: A61N 1/36521 : the parameter being derived from measurement of an electrical impedance
• CPC Class Codes: A61N 1/36535 : controlled by body position or posture
• CPC Class Codes: A61N 1/36542 : controlled by body motion, e.g. acceleration
• CPC Class Codes: A61N 1/36592 : controlled by the heart rate variability
• CPC Class Codes: G16H 15/00 : ICT specially adapted for medical reports, e.g. generation or transmission thereof
• CPC Class Codes: G16H 40/63 : for local operation
• CPC Class Codes: G16H 50/30 : for calculating health indices; for individual health risk assessment
• CPC Class Codes: G16Z 99/00 : Subject matter not provided for in other main groups of this subclass

Abstract

An adherent device to monitor a patient comprises an adhesive patch to adhere to a skin of the patient, and at least four electrodes connected to the patch and capable of electrically coupling to the patient. The adherent device further includes impedance circuitry coupled to the at least four electrodes to measure a hydration signal of the patient and electrocardiogram circuitry coupled to at least two of the at least four electrodes to measure an electrocardiogram signal of the patient.

Claims

1. An adherent device to monitor a patient, the device comprising:

an adhesive patch to adhere to a skin of the patient;

at least four electrodes connected to the patch and capable of electrically coupling to the patient;

impedance circuitry coupled to the at least four electrodes to measure a hydration signal of the patient; and

electrocardiogram circuitry coupled to at least two of the at least four electrodes to measure an electrocardiogram signal of the patient.

2. The adherent device of claim 1, wherein the at least four electrodes includes first and fourth outer electrodes located on opposite side of the adhesive patch and second and third inner electrodes.

3. The adherent device of claim 2, wherein the impedance circuitry is connected to drive a current between first and fourth outer electrodes and measure a voltage between second and third inner electrodes.

4. The adherent device of claim 3, wherein the electrocardiogram circuitry is coupled to the first and fourth outer electrodes.

5. The adherent device of claim 4, further including a first switch and second switch connected in series between the impedance circuitry and the first electrode and second electrode, wherein the first and second switch are closed when measuring the hydration signal and opened when measuring the electrocardiogram signal.

6. The adherent device of claim 1, further including an accelerometer mechanically coupled to the adhesive patch to generate an accelerometer signal in response to at least one of an activity or a position of the patient.

7. The adherent device of claim 6, wherein the adhesive patch is mechanically coupled to the at least four electrodes, the impedance circuitry, the electrocardiogram circuitry and the accelerometer, such that the patch is capable of supporting the at least four electrodes, the impedance circuitry, the electrocardiogram circuitry and the accelerometer when the adherent patch is adhered to the skin of the patient.

8. The adherent device of claim 7, further comprising:

a wireless communication circuitry coupled to the impedance circuitry, the electrocardiogram circuitry and the accelerometer to transmit to a remote center with a communication protocol at least one of the hydration signal, the electrocardiogram signal or the accelerometer signal.

9. The adherent device of claim 8, wherein wireless communication circuitry is configured to transmit the hydration signal, the electrocardiogram signal and the accelerometer signal to the remote center with a single wireless hop from the wireless communication circuitry to an intermediate device.

10. The adherent device of claim 1, wherein a maximum dimension across the at least four electrodes comprising no more than about eight inches, such that the at least four electrodes are capable of adhering to either a left side or a right side of the patient.

11. The adherent device of claim 10, wherein the maximum distance across the at least four electrodes comprises no more than about six inches.

12. The adherent device of claim 10, wherein the device comprises a maximum dimension across no more than about 8 inches and wherein the patch is capable of measuring the electrocardiogram and the impedance from a left side or a right side of the patient.

13. A method of monitoring a patient, the method comprising:

adhering an adhesive patch to a skin of the patient to couple at least four electrodes to the skin of the patient;

measuring a hydration signal of the patient with impedance circuitry coupled to the at least four electrodes; and

measuring an electrocardiogram signal of the patient with electrocardiogram circuitry coupled to at least two of the at least four electrodes.

14. The method of claim 13, wherein measuring the hydration signal includes closing first and second switches to connect the impedance circuitry to one or more of the electrodes to drive a current through the one or more electrodes.

15. The method of claim 14, wherein measuring the electrocardiogram signal includes opening the first and second switches to disconnect the impedance circuitry from one or more of the electrodes.

16. The method of claim 15, further including:

measuring a signal from an accelerometer in response to at least one of an activity or position of the patient.

17. The method of claim 16, wherein the adhesive patch supports the at least four electrodes, the impedance circuitry, the electrocardiogram circuitry and the accelerometer when the adherent patch is adhered to the skin of the patient.