Determining an early warning score based on wearable device measurements
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Publication Number
US-11464457-B2
Publication Date
2022-10-11
Expiration Date
Abstract
A method and systems for determining an early warning score for a health status of a patient are provided. An example method includes acquiring, during a predetermined time period via sensors integrated into a wearable device worn on a wrist of the patient, initial values of medical parameters of patient. The medical parameters include a respiratory rate, oxygen saturation, temperature, blood pressure, and pulse rate, and level of consciousness. The method includes determining, based on the initial values, normal values of the medical parameters. The method includes acquiring, via the sensors and at a pre-determined frequency, further values of the medical parameters. The method includes determining, based on deviations of the further values from the normal values, individual scores for the medical parameters. The method includes calculating, based on the individual scores, a general score. The method includes determining, based on the general score, the health status of the patient.
Core Innovation
The invention relates to an early warning score (EWS) system that uses a wrist-worn wearable device with sensors to acquire initial values and further values of medical parameters. The medical parameters include respiratory rate, oxygen saturation, skin temperature/external temperature, blood pressure and/or pulse, and level of consciousness. The system determines patient-specific normal values from the initial values and then determines deviations for each parameter from the patient-specific normal values for subsequent measurements.
For each medical parameter, the system determines individual parameter deviation-based scores and aggregates the individual scores into a weighted general health score using a weighted summation. The weights depend on a current health status and environmental conditions. The system further determines a health status from the weighted general health score and uses the health status to adjust at least one of a pre-determined time period and a pre-determined frequency of acquiring further values.
The weighted general health score is used to generate an interval-based scoring scale personalized to patient attributes. The scoring scale uses patient attributes including age, gender, ethnicity, and gene expression, and supports individualized intervals and interval-based scores. The system may trigger an alarm based on the weighted general health score crossing one or more thresholds, and the alarm unit includes an alarm and/or a touch sensor for level-of-consciousness detection.
Claims Coverage
The claims coverage centers on 0 inventive features explicitly described in patent.
Not explicitly described in patent.
Stated Advantages
Adaptive acquisition frequency based on a weighted general health score and determined health status.
Personalized patient-specific scoring using patient-specific normal values and an interval-based scoring scale adjusted using patient attributes.
Weighted aggregation of parameter deviation-based scores using weights dependent on current health status and environmental conditions.
Alarm triggering based on thresholds of the weighted general health score, including alarm and/or a touch sensor for level-of-consciousness detection.
Documented Applications
Generating an early warning score (EWS) to determine health status using a wrist-worn wearable device and individualized parameter deviations.
Monitoring respiratory rate, oxygen saturation, temperature, blood pressure/pulse, and level of consciousness for health-status determination and adaptive measurement scheduling.
Using an interval-based scoring scale personalized to patient attributes such as age, gender, ethnicity, and gene expression.
Supporting detection and alarm of health deterioration by triggering alarms when score thresholds are met.
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