Monitoring a condition of a subject

• US 10,194,810 B2
• Filed: 06/15/2017
• Issued: 02/05/2019
• Est. Priority Date: 02/05/2004
• Status: Active Grant

• Current Assignee: Hill-Rom Services Incorporated (Baxter International Inc.)
• Original Assignee: EarlySense Ltd.
• Inventors: Halperin, Avner, Gross, Yossi
• Primary Examiner(s): Johnson, Nicole F
• Assistant Examiner(s): Lavert, Nicole F.
• Application Number:
  US15/624,207
• Publication Number:
  US 20170281017A1
• Time in Patent Office: 600 Days
• Field of Search: 600484, 600511, 600529
• CPC Class Codes: A61B 2560/0252 using ambient temperature
• CPC Class Codes: A61B 2562/0204 Acoustic sensors
• 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 5/024 Detecting, measuring or recording pulse rate or heart rate A61B5/0205, A61B5/021 take precedence
• CPC Class Codes: A61B 5/02405 Determining heart rate variability
• CPC Class Codes: A61B 5/0816 Measuring devices for examining respiratory frequency measuring frequency of electric signals G01R23/00
• CPC Class Codes: A61B 5/0823 Detecting or evaluating cough events
• 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 5/1102 Ballistocardiography
• CPC Class Codes: A61B 5/1107 Measuring contraction of parts of the body, e.g. organ, muscle apparatus for measuring work or force in general G01L
• CPC Class Codes: A61B 5/1116 Determining posture transitions
• CPC Class Codes: A61B 5/1118 Determining activity level
• CPC Class Codes: A61B 5/113 occurring during breathing
• CPC Class Codes: A61B 5/4356 Assessing uterine contractions A61B5/033 takes precedence
• CPC Class Codes: A61B 5/4806 Sleep evaluation A61B5/4821 takes precedence; devices for inducing sleep A61M21/02
• CPC Class Codes: A61B 5/4812 Detecting sleep stages or cycles
• CPC Class Codes: A61B 5/4818 Sleep apnoea
• CPC Class Codes: A61B 5/4836 Diagnosis combined with treatment in closed-loop systems or methods A61B5/0036 takes precedence
• CPC Class Codes: A61B 5/6892 Mats
• 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 5/7278 : Artificial waveform generation or derivation, e.g. synthesising signals from measured signals A61B5/327 takes precedence
• CPC Class Codes: A61B 5/7282 : Event detection, e.g. detecting unique waveforms indicative of a medical condition A61B5/4094, A61B5/4818, A61B5/349, A61B5/0823 take precedence
• 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: 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

Apparatus for monitoring a clinical condition of a subject is described. At least one motion sensor detects motion of the subject and generates a sensed motion signal responsive to the sensed motion. A signal analyzer is adapted to determine a heartbeat-related signal from the sensed motion signal, to determine a first breathing-rate-related signal from the heartbeat-related signal, and to determine a second breathing-rate-related signal directly from the sensed motion signal. The signal analyzer determines the validity of the heartbeat-related signal by comparing the first breathing-rate-related signal with the second breathing-rate-related signal. Other applications are also described.

Claims

1. A method for simultaneous measurement of heart rate and respiration rate of a subject, the method comprising:

sensing motion of the subject and generating a sensed motion signal responsive to the sensed motion;

determining a heartbeat-related signal from the sensed motion signal;

determining a first breathing-rate-related signal from the heartbeat-related signal;

determining a second breathing-rate-related signal directly from the sensed motion signal; and

determining a validity of the heartbeat-related signal by comparing the first breathing-rate-related signal with the second breathing-rate-related signal.

2. The method as recited in claim 1, wherein sensing motion of the subject comprises sensing motion of the subject without contacting the subject.

3. The method as recited in claim 1, wherein sensing motion of the subject comprises sensing motion of the subject without contacting or viewing clothes the subject is wearing.

4. The method as recited in claim 1, wherein sensing motion of the subject comprises sensing motion of the subject without requiring compliance of the subject.

5. The method according to claim 1, wherein determining the first breathing-rate-related signal from the heartbeat-related signal comprises detecting a sinus-arrhythmia signal within the heartbeat-related signal.

6. A system for simultaneous measurement of heart rate and respiration rate of a subject, the system comprising:

at least one motion sensor adapted to detect motion of the subject and generate a sensed motion signal responsive to the sensed motion; and

a signal analyzer;

adapted to determine a heartbeat-related signal from the sensed motion signal,

adapted to determine a first breathing-rate-related signal from the heartbeat-related signal,

adapted to determine a second breathing-rate-related signal directly from the sensed motion signal, and

adapted to determine validity of the heartbeat-related signal by comparing the first breathing-rate-related signal with the second breathing-rate-related signal.

7. The system as recited in claim 6, wherein the motion sensor is adapted to detect motion of the subject and generate the sensed motion signal responsive to the sensed motion, without contacting the subject.

8. The system as recited in claim 6, wherein the motion sensor is adapted to detect motion of the subject and generate the sensed motion signal responsive to the sensed motion, without contacting or viewing clothes the subject is wearing.

9. The system as recited in claim 6, wherein the motion sensor is adapted to detect motion of the subject and generate the sensed motion signal responsive to the sensed motion, without requiring compliance of the subject.

10. The system as recited in claim 6, wherein the signal analyzer is configured to determine the first breathing-rate-related signal from the heartbeat-related signal by detecting a sinus-arrhythmia signal within the heartbeat-related signal.