Systems and methods for monitoring the attachment and/or positioning of a wearable of a sensor device

• US 10,682,076 B2
• Filed: 06/03/2016
• Issued: 06/16/2020
• Est. Priority Date: 03/07/2010
• Status: Active Grant

• Current Assignee: Leaf Healthcare, Inc. (Smith & Nephew PLC)
• Original Assignee: Leaf Healthcare, Inc. (Smith & Nephew PLC)
• Inventors: Larson, Barrett J., Shen, Daniel Z.
• Primary Examiner(s): Tweel, Jr., John A
• Application Number:
  US15/173,595
• Publication Number:
  US 20160278691A1
• Time in Patent Office: 1,474 Days
• Field of Search: 340540
• CPC Class Codes: A61B 2562/02 Details of sensors specially adapted for in-vivo measurements
• CPC Class Codes: A61B 2562/0214 Capacitive electrodes
• CPC Class Codes: A61B 2562/0219 Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
• CPC Class Codes: A61B 2562/0223 Magnetic field sensors
• CPC Class Codes: A61B 2562/0247 Pressure sensors
• CPC Class Codes: A61B 2562/0261 Strain gauges
• CPC Class Codes: A61B 2562/029 Humidity sensors
• CPC Class Codes: A61B 2562/043 in a linear array
• CPC Class Codes: A61B 5/01 Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue clinical contact thermometers G01K13/20
• 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 5/024 Detecting, measuring or recording pulse rate or heart rate A61B5/0205, A61B5/021 take precedence
• CPC Class Codes: A61B 5/026 Measuring blood flow A61B3/1233, A61B3/1241 take precedence
• CPC Class Codes: A61B 5/0261 using optical means, e.g. infrared light
• CPC Class Codes: A61B 5/0531 Measuring skin impedance
• CPC Class Codes: A61B 5/0816 Measuring devices for examining respiratory frequency measuring frequency of electric signals G01R23/00
• CPC Class Codes: A61B 5/1113 Local tracking of patients, e.g. in a hospital or private home
• CPC Class Codes: A61B 5/1114 Tracking parts of the body
• CPC Class Codes: A61B 5/1115 Monitoring leaving of a patient support, e.g. a bed or a wheelchair
• CPC Class Codes: A61B 5/1117 Fall detection
• CPC Class Codes: A61B 5/1118 : Determining activity level
• CPC Class Codes: A61B 5/113 : occurring during breathing
• CPC Class Codes: A61B 5/14542 : for measuring blood gases A61B5/14551 takes precedence
• CPC Class Codes: A61B 5/14551 : for measuring blood gases
• CPC Class Codes: A61B 5/447 : specially adapted for aiding the prevention of ulcer or pressure sore development, i.e. before the ulcer or sore has developed
• CPC Class Codes: A61B 5/4866 : Evaluating metabolism A61B5/083 takes precedence
• CPC Class Codes: A61B 5/4884 : inducing physiological or psychological stress, e.g. applications for stress testing
• CPC Class Codes: A61B 5/6801 : specially adapted to be attached to or worn on the body surface
• CPC Class Codes: A61B 5/683 : Means for maintaining contact with the body A61B5/6802 takes precedence
• CPC Class Codes: A61B 5/6843 : Monitoring or controlling sensor contact pressure
• CPC Class Codes: A61B 5/6891 : Furniture
• CPC Class Codes: A61B 5/6892 : Mats
• CPC Class Codes: A61B 5/7246 : using correlation, e.g. template matching or determination of similarity
• 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 5/7282 : 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 7/00 : Instruments for auscultation
• CPC Class Codes: A61G 2203/32 : for force
• CPC Class Codes: A61G 2203/34 : for pressure
• CPC Class Codes: A61G 2203/42 : for inclination
• CPC Class Codes: A61G 2203/46 : for temperature
• CPC Class Codes: A61G 2205/60 : using magnetic or electronic identifications, e.g. chips, RFID, electronic tags
• CPC Class Codes: A61G 7/057 : Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor ventilation openings in mattresses A47C21/042; pneumatic or hydraulic mattresses A47C27/08
• CPC Class Codes: G16H 20/00 : ICT specially adapted for therapies or health-improving plans, e.g. for handling prescriptions, for steering therapy or for monitoring patient compliance
• CPC Class Codes: G16H 20/10 : relating to drugs or medications, e.g. for ensuring correct administration to patients
• CPC Class Codes: G16H 20/40 : relating to mechanical, radiation or invasive therapies, e.g. surgery, laser therapy, dialysis or acupuncture
• CPC Class Codes: G16H 40/63 : for local operation

Abstract

A system for monitoring medical conditions including pressure ulcers, pressure-induced ischemia and related medical conditions comprises at least one sensor adapted to detect one or more patient characteristic including at least position, orientation, temperature, acceleration, moisture, resistance, stress, heart rate, respiration rate, and blood oxygenation, a host for processing the data received from the sensors together with historical patient data to develop an assessment of patient condition and suggested course of treatment. In some embodiments, the system can further include a support surface having one or more sensors incorporated therein either in addition to sensors affixed to the patient or as an alternative thereof. The support surface is, in some embodiments, capable of responding to commands from the host for assisting in implementing a course of action for patient treatment. The sensor can include bi-axial or tri-axial accelerometers, as well as resistive, inductive, capactive, magnetic and other sensing devices, depending on whether the sensor is located on the patient or the support surface, and for what purpose.

Claims

1. A method for detecting a status of a wearable sensor device including at least one accelerometer for monitoring a patient, the method comprising:

receiving acceleration data from the at least one accelerometer,

determining, based at least on the acceleration data;

(a) patient orientation data indicating a physical orientation of the patient, and

(b) acceleration-based biometric data including at least one of acceleration-based respiratory data, acceleration-based cardiac data, or acceleration-based body movement data,

comparing the acceleration-based biometric data to at least one predetermined threshold value for at least one biometric parameter,

determining that the sensor device is not properly attached or positioned relative to the patient based on the comparison of the acceleration-based biometric data with the at least one predetermined threshold value, and

generating a notification in response to determining that the sensor device is not properly attached or positioned relative to the patient.

2. The method of claim 1 wherein the at least one predetermined threshold value comprises at least one of a minimum threshold value and a maximum threshold value.

6. The method of claim 1, wherein the acceleration-based biometric data includes a respiration rate of the patient determined based on the acceleration data.

7. The method of claim 1, wherein the acceleration-based biometric data includes a heart rate of the patient determined based on the acceleration data.

8. The method of claim 1, further comprising determining an angular orientation of the sensor device with respect to the patient based on the acceleration data.

9. The method of claim 1, further comprising determining a location on the patient'"'"'s body at which the device sensor is affixed based on the acceleration data.

3. A method for detecting a status of a wearable sensor device for monitoring a patient, the method comprising:

receiving sensor data from at least one sensor of the wearable sensor device,

determining, based on the sensor data, sensor device orientation data indicating orientations or movements of the wearable sensor device,

comparing the sensor device orientation data with reference patient orientation data associated with a plurality or range of reference patient orientations or movements,

determining that the sensor device is not properly attached or positioned relative to the patient based on the comparison of the sensor device orientation data with the reference patient orientation data, and

generating a notification in response to determining that the sensor device is not properly attached or positioned relative to the patient.

10. The method of claim 3, wherein the reference patient orientation data defines physically possible patient orientations, and the method comprises determining that the acceleration-based biometric data corresponds with a physically impossible patient orientation, based on the reference patient orientation data.

11. The method of claim 3, wherein the reference patient orientation data defines a maximum angular range of motion in at least one plane.

12. The method of claim 3, wherein the reference patient orientation data comprises patient-specific data corresponding with at least one condition of the patient.

13. The method of claim 3, wherein comparing the sensor device orientation data with reference patient orientation data comprises comparing the sensor device orientation data with sensor device orientation data previously generated and stored by the sensor device.

4. A system for monitoring physiologic conditions of a patient, the system comprising:

a wearable sensor device configured to be attached to worn by a patient and including at least one accelerometer adapted to output acceleration data, and

a processor adapted to;

determine, based at least on the acceleration data;

(a) patient orientation data indicating a physical orientation of the patient, and

(b) acceleration-based biometric data including at least one of acceleration-based respiratory data, acceleration-based cardiac data, or acceleration-based body movement data,

compare the acceleration-based biometric data at least one threshold value for at least one biometric parameter,

determine, based on the comparison, that the sensor device is not properly attached or positioned relative to the patient, and

generate a notification in response to determining that the sensor device is not properly attached or positioned relative to the patient.

5. The system of claim 4 further comprising a display device configured to display, in response to the notification, an indication that the sensor device is not properly attached or positioned relative to the patient.

14. The system of claim 4, wherein the acceleration-based biometric data includes a respiration rate of the patient determined based on the acceleration data.

15. The system of claim 4, wherein the acceleration-based biometric data includes a heart rate of the patient determined based on the acceleration data.

16. The system of claim 4, wherein the processor is further configured to determine an angular orientation of the sensor device with respect to the patient based on the acceleration data.

17. The system of claim 4, wherein the processor is further configured to determine a location on the patient'"'"'s body at which the device sensor is affixed based on the acceleration data.

18. The system of claim 4, wherein the wearable sensor device includes visible indicia indicating an orientation direction for aligning the sensor device with respect to the patient.