Procedure for deriving reliable information on respiratory activity from heart period measurement
AssigneeFirstbeat Technologies Oy
InventorsJoni Kettunen, Sami Saalasti
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Abstract
The present invention describes a method of tracking minute ventilation from R-R intervals that are based on the acquisition of ECG signal. Sub-methods (RDF1), which are mainly based on heart rate variability, are used, wherein the respiratory frequency is determined from a pattern of rhythmic changes in heart beat data. The sub-methods (RDF1-n) are combined using an expert function, wherein each sub-method (RDF1-n) determines an estimate of the respiratory frequency.
Claims16
A method for deriving reliable information on respiratory activity from a pattern of rhythmic changes in heart beat data, the method comprising the steps of:
- measuring an electrocardiographic (ECG)-signal;
- obtaining RR-interval data from the ECG-signal;
- calculating respiratory frequency estimates from the RR-interval data using two or more sub-methods, at least one sub-method being based on heart rate variability;
- combining the calculated respiratory frequency estimates in a health apparatus using an expert function including a weight vector across frequencies for each frequency estimate and obtaining a resulting respiratory frequency estimate directly in the combination made by said expert function.
Dependencies are inferred from the claim text.