Method and apparatus for detecting weak physiological signals
First Claim
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1. A method for detecting a physiological signal of interest comprising:
- disposing a two or more motion sensing devices on or about a patient;
calibrating the two or more motion sensors such that a synchronization adjustment is determined for each motion sensor;
collecting a data set from each motion sensor;
synchronizing the data sets using the synchronization adjustment; and
using the synchronized data sets to solve a set of simultaneous equations in which one variable represents the physiological signal of interest.
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Abstract
A method and apparatus are provided for measuring a weak physiological signal in the presence of stronger signals. The method and apparatus utilize motion sensing devices placed on or about the patient to obtain a motion data set from each motion sensing device describing the aggregate detected motion. The data sets are synchronized and then used to solve a set of simultaneous equations which allows for the separation of the various motion components which may include such components of interest as fetal heart motion.
31 Citations
32 Claims
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1. A method for detecting a physiological signal of interest comprising:
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disposing a two or more motion sensing devices on or about a patient;
calibrating the two or more motion sensors such that a synchronization adjustment is determined for each motion sensor;
collecting a data set from each motion sensor;
synchronizing the data sets using the synchronization adjustment; and
using the synchronized data sets to solve a set of simultaneous equations in which one variable represents the physiological signal of interest. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for monitoring fetal heart motion comprising:
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collecting a motion data set from each of two or more motion sensing devices disposed on or about a patient;
synchronizing the motion data sets; and
solving a set of simultaneous equations to determine two or more motion components of the synchronized motion data sets. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A physiological monitoring system for monitoring a physiological signal of interest comprising:
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a sensor array comprising two or more motion sensitive devices;
a signal acquisition circuit configured to receive a signal from each motion sensitive device such that each signal describes an aggregate motion; and
a signal analysis circuit configured to receive the signals from the signal acquisition circuit, to synchronize the signals, and to solve a set of simultaneous equation using the signals such that two or more components of the aggregate motion are discerned, wherein at least one component is the physiological signal of interest. - View Dependent Claims (19, 20, 21, 22, 23)
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- 24. A physiological monitoring circuit configured to separate a motion component of interest from an aggregate motion data set by solving a set of simultaneous equations using a two or more synchronized motion data sets.
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28. A physiological monitoring system comprising:
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a sensor array comprising two or more motion sensitive devices;
a signal acquisition circuit configured to receive a signal from each motion sensitive device wherein each signal describes an aggregate motion; and
a signal analysis circuit configured to receive the signals from the signal acquisition circuit, possessing means for synchronizing the signals and means for solving a set of simultaneous equations using the synchronized signals such that a motion component of interest of the aggregate motion is discerned. - View Dependent Claims (29, 30, 31, 32)
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Specification