SYSTEMS AND METHODS FOR MEASUREMENT OF DEPTH OF BREATH AND PARADOXICAL BREATHING
First Claim
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1. A method of sensing motion using a motion sensor, the method comprising:
- generating electromagnetic radiation from a source of radiation, wherein the frequency of the electromagnetic radiation is in the radio frequency range;
transmitting the electromagnetic radiation towards a subject using one or more transmitters;
receiving a radiation scattered at least by the subject using one or more receivers;
extracting a Doppler shifted signal from the scattered radiation;
transforming the Doppler shifted signal to a digitized motion signal, said digitized motion signal comprising one or more frames, wherein the one or more frames comprise time sampled quadrature values of the digitized motion signal;
processing said one or more frames to distinguish, at least in part, information corresponding to the cardiopulmonary movement of the subject or a part of the subject, substantially separate from non-cardiopulmonary motion or other signal interference;
estimating the subject'"'"'s depth of breath from the cardiopulmonary movement information; and
communicating the information to an output system that is configured to perform an output action.
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Abstract
A radar-based physiological motion sensor is disclosed. Doppler-shifted signals can be extracted from the signals received by the sensor. The Doppler-shifted signals can be digitized and processed subsequently to extract information related to the cardiopulmonary motion in one or more subjects. The information can include respiratory rates, heart rates, waveforms due to respiratory and cardiac activity, direction of arrival, abnormal or paradoxical breathing, etc. In various embodiments, the extracted information can be displayed on a display.
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Citations
129 Claims
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1. A method of sensing motion using a motion sensor, the method comprising:
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generating electromagnetic radiation from a source of radiation, wherein the frequency of the electromagnetic radiation is in the radio frequency range; transmitting the electromagnetic radiation towards a subject using one or more transmitters; receiving a radiation scattered at least by the subject using one or more receivers; extracting a Doppler shifted signal from the scattered radiation; transforming the Doppler shifted signal to a digitized motion signal, said digitized motion signal comprising one or more frames, wherein the one or more frames comprise time sampled quadrature values of the digitized motion signal; processing said one or more frames to distinguish, at least in part, information corresponding to the cardiopulmonary movement of the subject or a part of the subject, substantially separate from non-cardiopulmonary motion or other signal interference; estimating the subject'"'"'s depth of breath from the cardiopulmonary movement information; and communicating the information to an output system that is configured to perform an output action. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8-67. -67. (canceled)
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68. A method of estimating the presence or absence of paradoxical breathing using a motion sensor, the method comprising:
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generating an electromagnetic radiation from a source of radiation, wherein the frequency of the electromagnetic radiation is in the radio frequency range; transmitting the electromagnetic radiation towards a subject using one or more transmitters; receiving a radiation scattered at least by the subject using one or more receivers; extracting a Doppler shifted signal from the scattered radiation; transforming the Doppler shifted signal to a digitized quadrature motion signal, said digitized quadrature motion signal comprising one or more frames, wherein the one or more frames comprise time sampled quadrature values of the digitized motion signal; detecting a non-cardiopulmonary motion to identify from the digitized motion signal one or more non-cardiopulmonary motion detection events or other signal interference events corresponding to the presence or absence of a non-cardiopulmonary motion or other signal interference; executing by a processor a paradoxical breathing indication module to estimate the presence or absence of paradoxical breathing; and providing information related to at least the presence, absence, or degree of paradoxical breathing. - View Dependent Claims (69, 70, 71, 72, 73, 74, 75, 76, 77, 78)
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79-127. -127. (canceled)
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128. A system for estimating the presence or absence of paradoxical breathing using a motion sensor, the system comprising:
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one or more sources for generating electromagnetic radiation, wherein the frequency of the generated electromagnetic radiation is in the radio frequency range; one or more transmitters configured to transmit the generated electromagnetic radiation towards a subject; one or more receivers configured to receive a radiation scattered at least by the subject; a signal extractor configured to extract a Doppler shifted signal from the scattered radiation; and a processor configured to transform the Doppler shifted signal to a digitized motion signal, said digitized motion signal comprising one or more frames, wherein the one or more frames comprise time sampled quadrature values of the digitized motion signal; wherein the processor is configured to execute a non-cardiopulmonary motion detection algorithm to identify from the digitized motion signal one or more non-cardiopulmonary motion detection events or other signal interference events corresponding to the presence or absence of a non-cardiopulmonary motion or other signal interference, wherein the processor is further configured to execute a paradoxical breathing indication algorithm to estimate the presence or absence of paradoxical breathing, and wherein the system is configured to provide information related to at least the presence, absence, or degree of paradoxical breathing. - View Dependent Claims (129)
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Specification