Method of analyzing and processing signals
First Claim
1. A method for determining physiological information, comprising:
- obtaining, using a signal processor, a photoplethysmographic (PPG) biosignal from a subject at least in part using a signal acquisition unit;
decomposing, using the signal processor, the PPG biosignal at least in part using a first wavelet transform analysis to generate first transform data;
decomposing, using the signal processor, the PPG biosignal at least in part using a second wavelet transform analysis to generate second transform data;
analyzing, using the signal processor, the first transform data and the second transform data; and
selecting, using the signal processor, features of at least one of the first transform data and the second transform data based at least in part on the analysis to determine physiological information of the subject wherein the physiological information comprises at least one of heart rate of the subject, breathing rate of the subject, and blood oxygen saturation of the subject.
3 Assignments
0 Petitions
Accused Products
Abstract
A physiological measurement system is disclosed which can take a pulse oximetry signal such as a photoplethysmogram from a patient and then analyze the signal to measure physiological parameters including respiration, pulse, oxygen saturation and movement. The system comprises a pulse oximeter which includes a light emitting device and a photodetector attachable to a subject to obtain a pulse oximetry signal; analogue to digital converter means arranged to convert said pulse oximetry signal into a digital pulse oximetry signal; signal processing means suitable to receive said digital pulse oximetry signal and arranged to decompose that signal by wavelet transform means; feature extraction means arranged to derive physiological information from the decomposed signal; an analyzer component arranged to collect information from the feature extraction means; and data output means arranged in communication with the analyzer component.
-
Citations
24 Claims
-
1. A method for determining physiological information, comprising:
-
obtaining, using a signal processor, a photoplethysmographic (PPG) biosignal from a subject at least in part using a signal acquisition unit; decomposing, using the signal processor, the PPG biosignal at least in part using a first wavelet transform analysis to generate first transform data; decomposing, using the signal processor, the PPG biosignal at least in part using a second wavelet transform analysis to generate second transform data; analyzing, using the signal processor, the first transform data and the second transform data; and selecting, using the signal processor, features of at least one of the first transform data and the second transform data based at least in part on the analysis to determine physiological information of the subject wherein the physiological information comprises at least one of heart rate of the subject, breathing rate of the subject, and blood oxygen saturation of the subject. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A monitoring system for determining physiological information, the system comprising:
-
a signal acquisition unit attachable to a subject to obtain a photoplethysmoraphic (PPG) biosignal; and a signal processor configured to; decompose the PPG biosignal at least in part using a first wavelet transform analysis to generate first transform data; decompose the PPG biosignal at least in part using second wavelet transform analysis to generate a second transform data; analyze the first transform data and the second transform data; and select features of at least one of the first transform data and the second transform data based at least in part on the analysis to determine physiological information of the subject, wherein the physiological information comprises at least one of heart rate of the subject, breathing rate of the subject, and blood oxygen saturation of the subject. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
-
Specification