# US 11,304,649 B2 · System and method for self-assessment of physical capabilities and condition changes

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- Number: US 11,304,649 B2
- Document ID: US11304649B2
- Status: Granted
- Kind: B2
- Application number: 16/268,134
- Filed: 2019-02-05
- Published: 2020-08-06
- Granted: 2022-04-19
- Earliest claimed: 2018-02-05
- Assignees: Tallinn University of Technology; Motionmon OÜ
- Applicants: Tallinn University of Technology; Motionmon OÜ
- Inventors: Alar Kuusik; Katrin Gross-Paju; Muhammad Mahtab Alam
- Web page: https://patentgrep.com/patent/US11304649B2

## CPC

- A61B 5/4023: {Evaluating sense of balance}
- A61B 5/0002: {Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network (endoradiosondes A61B5/07)}
- A61B 5/0077: {Devices for viewing the surface of the body, e.g. camera, magnifying lens}
- A61B 5/1101: {Detecting tremor}
- A61B 5/1114: {Tracking parts of the body}
- A61B 5/1116: {Determining posture transitions}
- A61B 5/1122: {of movement trajectories}
- A61B 5/1124: {Determining motor skills}
- A61B 5/1125: {Grasping motions of hands}
- A61B 5/1128: {using image analysis (A61B5/1127 takes precedence)}
- A61B 5/224: {Measuring muscular strength}
- A61B 5/681: {Wristwatch-type devices}
- A61B 5/6823: {Trunk, e.g., chest, back, abdomen, hip}
- A61B 5/6825: {Hand}
- A61B 5/6898: {Portable consumer electronic devices, e.g. music players, telephones, tablet computers}
- A61B 5/7285: {for synchronizing or triggering a physiological measurement or image acquisition with a physiological event or waveform, e.g. an ECG signal}
- A61B 5/7405: {using sound}
- A61B 2505/07: Home care
- A61B 2505/09: Rehabilitation or training
- A61B 2562/0219: Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

Disclosed is a system for objective self-assessment of physical capabilities and condition changes of individuals with conditions like multiple sclerosis, the system has a mobile device with an appropriate software for carrying out a set of tests for assessment of motor capabilities such as body balance, muscle strength, and muscle spasticity, and receiving assessment feedback. The system has inertial motion sensors for performing motion sensing, wherein said inertial motion sensors are integrated with said mobile device, e.g., a smartphone, a smart watch, or a personal computer, or in a separate wearable sensor device, connected with said mobile device over wired or wireless data connection. Also disclosed is a method for such self-assessment with such system.

## Claims

### Claim 1

A system for objective self-assessment of physical capabilities of a person, said system comprising:
a mobile device, a software executed on said mobile device for carrying out a set of self assessment tests for assessment of motor capabilities, said tests selected from a group comprising body balance, muscle strength, muscle spasticity, and hand dexterity, and for receiving assessment feedback;
at least one inertial motion sensor for performing motion sensing, wherein said inertial motion sensor is integrated with said mobile device, selected from a group consisting of a smartphone, a smart watch, a personal computer, or in a separate wearable sensor device, wherein said inertial motion sensor is connected with said mobile device over a wired or a wireless data connection, wherein said set of tests comprises a postural sawy test, wherein said software is configured to divide said postural sway test into an eyes open phase and an eyes closed phase separated by either a motion marker in the sensor signal intentionally produced by the user performing an agreed sudden movement or by an artificially generated motion marker in the sensor signal produced by said mobile device during an audible signal indicating a transition between said eyes open phase and said eyes closed phase.

### Claim 2 (depends on 1)

The system of claim 1, wherein said set of self-assessment tests further comprises a range of motion test of extremities providing motion range and speed data.

### Claim 3 (depends on 2)

The system of claim 2, wherein an angular motion range is calculated based on said mobile device gyroscope angular velocity readings and motion speed and trajectory error caused by the jitter of motion sensor sampling rate is compensated using timestamps of sampling events.

### Claim 4 (depends on 1)

The system of claim 1, wherein said set of self-assessment tests further comprises a jumping test providing information about jumping time or height, a spasticity test of extremities, or a 9-hole peg test with one to six numeric assessment results to each test.

### Claim 5 (depends on 4)

The system of claim 4, wherein linear accelerometer measurement error caused by the jitter of motion sensor sampling rate is compensated using timestamps of sampling events.

### Claim 6 (depends on 1)

The system as in claim 1, wherein said software is configured to segment said motion sensor signals into measurement phases based on specific shape markers in the motion signal, and to disregard recorded data far before and after the markers is discarded as noise before and after the testing procedure.

### Claim 7 (depends on 1)

The system of claim 1, wherein said spasticity is determined with measuring free drop speed and range of motion of lower extremities of the patient.

### Claim 8

A system for objective self-assessment of physical capabilities of a person, said system comprising:
a mobile device,
a software executed on said mobile device for carrying out a set of self-assessment tests for assessment of motor capabilities, said tests selected from a group comprising body balance, muscle strength, muscle spasticity, and hand dexterity, and for receiving assessment feedback;
at least one inertial motion sensor for performing motion sensing, wherein said inertial motion sensor is integrated with said mobile device, selected from a group consisting of a smartphone, a smart watch, a personal computer, or in a separate wearable sensor device, wherein said inertial motion sensor is connected with said mobile device over a wired or wireless data connection, wherein said system comprises at least one video camera for recording said tests, said mobile device is equipped with a light indicator and said software is configured to activate said light indicator and synchronize said video signal captured by said at least one video camera with light signals from said mobile device, with simultaneously marking of said sensor data stream with a specific signature.

### Claim 9

A method for self-assessment of physical capabilities and changes in a physical condition of a person, in a system, the method comprising:
providing an inertial motion sensor tightly attached to the person's body for measuring a body movement;
carrying out at least one test of self assessment of motor capabilities, said test selected from a group consisting of a body balance, a muscle strength, a muscle spasticity and a hand dexterity and collecting data;
sending collected data to a processing software executed in a mobile device or a remote server;
determining the change in said physical condition if at least one of the following measured parameters have changed between two consecutive measurements as follows: balance is worsening if postural sway amplitude has increased; muscle strength is decreasing if range of motion test motion amplitude has decreased or range of motion test speed has decreased or jumping height has decreased; spasticity is increasing if spasticity test motion range is decreased; and parameters are improved if opposite changes have occurred, and
video recording of the performed test and wherein said software is configured to synchronize said video recording and said signal from motion sensor by activating a light indicator on the motion sensor, and simultaneously adding a specific signature at said signal from motion sensor.

### Claim 10 (depends on 9)

Method as in claim 9, comprising the steps of execution of balance test, range of motion test of extremities, jumping test, spasticity test of extremities and providing one to six numeric assessment results after each test.

### Claim 11 (depends on 10)

Method as in claim 10, wherein in said range of motion test of extremities, said software is configured to calculate motion range based on angular speed and timestamps provided by said motion sensor.