System and method to detect significant arrhythmic events through a photoplethysmogram (PPG) and accelerometer
First Claim
1. A medical system for detecting arrhythmic events, said system comprising:
- at least one processor programmed to;
receive a photoplethysmogram (PPG) signal generated using a PPG probe positioned on or within a patient;
receive a pulse signal generated using an accelerometer positioned on or within the patient;
extract features from the PPG signal to generate PPG feature vectors;
extract features from the pulse signal to generate pulse feature vectors;
correlate the PPG feature vectors with the pulse feature vectors; and
evaluate correlated PPG feature vectors and correlated pulse feature vectors to detect arrhythmic events;
wherein features extracted from the PPG signal include inter pulse intervals (IPIs) for pairs of adjacent pulses of a last predetermined number of pulses; and
wherein features extracted from the pulse signal include inter pulse intervals (IPIs) for pairs of adjacent pulses of a last predetermined number of pulses.
1 Assignment
0 Petitions
Accused Products
Abstract
The medical system and method detect arrhythmic events. The medical system includes at least one processor programmed to perform the method. A photoplethysmogram (PPG) signal generated using a PPG probe positioned on or within a patient and a pulse signal generated using an accelerometer positioned on or within the patient received. Features from the PPG signal are extracted to PPG feature vectors, and features are extracted from the pulse signal to pulse feature vectors. The PPG feature vectors are correlated with the pulse feature vectors, and correlated PPG feature vectors and correlated pulse feature vectors are evaluated to detect arrhythmic events.
-
Citations
21 Claims
-
1. A medical system for detecting arrhythmic events, said system comprising:
at least one processor programmed to; receive a photoplethysmogram (PPG) signal generated using a PPG probe positioned on or within a patient; receive a pulse signal generated using an accelerometer positioned on or within the patient; extract features from the PPG signal to generate PPG feature vectors; extract features from the pulse signal to generate pulse feature vectors; correlate the PPG feature vectors with the pulse feature vectors; and evaluate correlated PPG feature vectors and correlated pulse feature vectors to detect arrhythmic events; wherein features extracted from the PPG signal include inter pulse intervals (IPIs) for pairs of adjacent pulses of a last predetermined number of pulses; and wherein features extracted from the pulse signal include inter pulse intervals (IPIs) for pairs of adjacent pulses of a last predetermined number of pulses. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
10. A medical method, performed by one or more processors, for detecting arrhythmic events, said method comprising:
-
receiving a photoplethysmogram (PPG) signal generated using a PPG probe positioned on or within a patient; receiving a pulse signal generated using an accelerometer positioned on or within the patient; extracting features from the PPG signal to generate PPG feature vectors; extracting features from the pulse signal to generate pulse feature vectors; correlating the PPG feature vectors with the pulse feature vectors; and
,evaluating correlated PPG feature vectors and correlated pulse feature vectors to detect arrhythmic events; wherein features extracted from the PPG signal include inter pulse intervals (IPIs) for pairs of adjacent pulses of a last predetermined number of pulses; wherein features extracted from the pulse signal include inter pulse intervals (IPIs) for pairs of adjacent pulses of a last predetermined number of pulses; and wherein the evaluating of the correlated PPG feature vectors and correlated pulse feature vectors to detect arrhythmic events does not use electrocardiograph (ECG) data. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. A medical system for detecting arrhythmic events, said system comprising:
at least one processor programmed to; receive a photoplethysmogram (PPG) signal generated using a PPG probe positioned on or within a patient; receive a pulse signal generated using an accelerometer positioned on or within the patient; extract features from the PPG signal to generate PPG feature vectors; extract features from the pulse signal to generate pulse feature vectors; correlate the PPG feature vectors with the pulse feature vectors; and evaluate correlated PPG feature vectors and correlated pulse feature vectors to detect arrhythmic events; wherein features extracted from the PPG signal include inter pulse intervals (IPIs) for pairs of adjacent pulses of a last predetermined number of pulses; wherein features extracted from the pulse signal include inter pulse intervals (IPIs) for pairs of adjacent pulses of a last predetermined number of pulses; and wherein the at least one processor is further programmed to; extract the features from the PPG signal according to a predetermined sampling rate, the predetermined sampling rate set based upon computational resources of the medical system, the computational resources including a processing power and a memory.
Specification