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US 2021/0330200 A1Published application
Systems and methods for patient fall detection
AssigneeMasimo Corporation
InventorsAmmar Al-Ali, Cornelius Raths, Mohammad Usman
Life of this patent
Estimating the term…
Abstract
A patient monitoring system to help manage a patient that is at risk of falling is disclosed. The system includes a patient-worn wireless sensor that senses the patient's motion and wirelessly transmits information indicative of the sensed motion to a patient monitor. The patient monitor receives, stores, and processes the transmitted information to determine whether the patient has fallen or is about to fall. Upon such detection, the system can notify the patient's caretakers that the patient has fallen or is about to fall and therefore, is in need of immediate attention.
Claims20
A method comprising:
- obtaining, with an accelerometer and a gyroscope of a wearable wireless device, motion data indicative of motion of a subject over a time period when the wearable wireless device is worn by the subject, wherein said motion data is indicative of movement and orientation of the subject;
- correlating, with one or more processors of the wearable wireless device, at least a portion of said motion data with training data comprising a plurality of fall and non-fall scenarios;
- determining, with said one or more processors of the wearable wireless device and based on at least a portion of said motion data, an impact experienced by the subject during a first portion of the time period;
- determining, with said one or more processors of the wearable wireless device and based on at least a portion of said motion data, one or more first activity characteristics representative of the subject's motion during a second portion of the time period that is prior to said impact;
- determining, with said one or more processors of the wearable wireless device and based on at least a portion of said motion data, rotation of the subject during at least a portion of the time period and comparing said rotation to a first threshold;
- determining, with said one or more processors of the wearable wireless device and based on at least a portion of said motion data, one or more second activity characteristics representative of the subject's motion during a third portion of the time period that is after said impact;
- determining, with said one or more processors of the wearable wireless device, that the subject experienced a fall based on at least said impact, said one or more first activity characteristics representative of the subject's motion during the second portion of the time period that is prior to said impact, said rotation exceeding said first threshold, and said one or more second activity characteristics representative of the subject's motion during the third portion of the time period that is after said impact;
- and
- responsive to determining that the subject experienced said fall, generating, with the wearable wireless device, an alert indicating that the subject experienced said fall.
6 more elements
A method comprising:
- obtaining, with an accelerometer and a gyroscope of a wearable wireless device, motion data indicative of motion of a subject over a time period when the wearable wireless device is worn by the subject;
- determining, based on at least a portion of said motion data, an impact experienced by the subject during the time period;
- determining, based on at least a portion of said motion data, one or more first activity characteristics representative of the subject's motion during the time period and prior to said impact;
- determining, based on at least a portion of said motion data, one or more second activity characteristics representative of the subject's motion during the time period and after said impact;
- determining, based on at least a portion of said motion data, rotation of the subject during at least a portion of the time period and comparing said rotation to a first threshold;
- determining that the subject experienced a fall based on said impact, said one or more first activity characteristics, said one or more second activity characteristics, and said rotation being above said first threshold;
- and
- responsive to determining that the subject experienced said fall, generating an alert indicating that the subject experienced said fall.
5 more elements
A wearable device comprising:
- one or more processors;
- a non-transitory computer readable medium storing instructions that, when executed by the one or more processors, cause the one or more processors to perform operations comprising:
- obtaining, from a motion sensor of the wearable device, motion data indicative of motion of a subject;
- determining, based on at least a portion of the motion data, an impact experienced by the subject;
- determining, based on at least a portion of the motion data, one or more first activity characteristics associated with the subject's motion prior to said impact experienced by the subject;
- determining, based on at least a portion of the motion data, rotation of the subject and comparing said rotation to a first threshold;
- determining, based on at least a portion of the motion data, one or more second activity characteristics associated with the subject's motion after said impact experienced by the subject;
- determining that the subject experienced a fall based on said impact experienced by the subject, said one or more first activity characteristics, said rotation exceeding said first threshold, and said one or more second activity characteristics;
- and
- responsive to determining that the subject experienced said fall, generating a notification indicating that the subject experienced said fall.
7 more elements
Dependencies are inferred from the claim text.