Methods and systems for determining physiological information based on statistical regression analysis

摘要

A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may select two segments of the physiological signal, shifted in time relative to one another by a lag value, and determine a correlation value between the two segments. The system may determine a metric based on the segments, and determine correlation information based on the correlation value and the metric. The metric may be indicative of how well the segments are correlated, providing additional information relative to the correlation value. Based on the metric, the system may modify the correlation value, determine a confidence value, or determine other information. The system may determine physiological rate information based on the correlation information.

主权项

1. A subject monitoring system for processing physiological information of a subject, comprising:
a pulse oximetry sensor configured to generate a physiological signal, wherein the pulse oximetry sensor detects light attenuated by the subject; and a pulse oximeter coupled to the pulse oximetry sensor, wherein the pulse oximeter is configured to:
select a first segment of the physiological signal comprising a plurality of values;select multiple segments of the physiological signal, each comprising a plurality of values, wherein the multiple segments are each shifted in time from the first segment by a unique lag;determine multiple correlation values between the first segment and the multiple segments;analyze the first segment and the multiple segments to determine a plurality of metric values;determine correlation information based on the multiple correlation values and based on the plurality of metric values;determine a physiological rate of the subject based on the determined correlation information; anddisplay the physiological rate of the subject on a display.