Wearable medical treatment device with motion/position detection
First Claim
1. A cardiac monitoring system comprising:
- cardiac sensing electrodes configured for external placement proximate to a patient and to sense ECG signals of the patient;
one or more accelerometers configured to generate patient activity data based on signals corresponding to changes in the patient'"'"'s body position and movement; and
a monitoring computer disposed in the cardiac monitoring system and operationally coupled to the cardiac sensing electrodes and the one or more accelerometers, the monitoring computer configured tocorrelate the ECG signals of the patient with the patient activity data generated from the one or more accelerometers to determine ECG signal contamination,analyze the ECG signals of the patient to extract at least heart rate data of the patient and detect a cardiac arrhythmia based at least in part on the heart rate data,change a confidence in the detected cardiac arrhythmia based on the determined ECG signal contamination by evaluating the patient activity data for a change in body state during the detection of the cardiac arrhythmia, wherein changing a confidence in the detected cardiac arrhythmia comprisesdetermining that the patient is unconscious if there has been no change in patient body state during the detection of the cardiac arrhythmia,determining that the patient is conscious if there has been a change in patient body state during the detection of the cardiac arrhythmia,increasing the confidence in the detected cardiac arrhythmia based on determining that the patient is unconscious, anddecreasing the confidence in the detected cardiac arrhythmia based on determining that the patient is conscious,wherein at least the patient activity data and the heart rate data are analyzed to determine a change in a physiological condition of the patient over a period of time.
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Accused Products
Abstract
A cardiac monitoring system includes cardiac sensing electrodes for external placement proximate to the patient to sense ECG signals of the patient; one or more accelerometers configured to generate patient activity data based on signals corresponding to changes in the patient'"'"'s body position and movement; and a monitoring computer configured to correlate the ECG signals of the patient with the patient activity data generated from the one or more accelerometers to determine ECG signal contamination, analyze the ECG signals of the patient to extract at least heart rate data of the patient and detect a cardiac arrhythmia based at least in part on the heart rate data, and change a confidence in the detected cardiac arrhythmia based on the determined ECG signal contamination; wherein at least the patient activity data and the heart rate data are analyzed to determine a change in a physiological condition of the patient over time.
185 Citations
19 Claims
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1. A cardiac monitoring system comprising:
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cardiac sensing electrodes configured for external placement proximate to a patient and to sense ECG signals of the patient; one or more accelerometers configured to generate patient activity data based on signals corresponding to changes in the patient'"'"'s body position and movement; and a monitoring computer disposed in the cardiac monitoring system and operationally coupled to the cardiac sensing electrodes and the one or more accelerometers, the monitoring computer configured to correlate the ECG signals of the patient with the patient activity data generated from the one or more accelerometers to determine ECG signal contamination, analyze the ECG signals of the patient to extract at least heart rate data of the patient and detect a cardiac arrhythmia based at least in part on the heart rate data, change a confidence in the detected cardiac arrhythmia based on the determined ECG signal contamination by evaluating the patient activity data for a change in body state during the detection of the cardiac arrhythmia, wherein changing a confidence in the detected cardiac arrhythmia comprises determining that the patient is unconscious if there has been no change in patient body state during the detection of the cardiac arrhythmia, determining that the patient is conscious if there has been a change in patient body state during the detection of the cardiac arrhythmia, increasing the confidence in the detected cardiac arrhythmia based on determining that the patient is unconscious, and decreasing the confidence in the detected cardiac arrhythmia based on determining that the patient is conscious, wherein at least the patient activity data and the heart rate data are analyzed to determine a change in a physiological condition of the patient over a period of time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A wearable defibrillation device comprising:
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cardiac sensing electrodes configured for external placement proximate to a patient and to sense ECG signals of the patient; one or more therapy pads disposed on the patient; one or more accelerometers configured to generate patient activity data based on signals corresponding to changes in the patient'"'"'s body position and movement; and a monitoring computer disposed in the wearable defibrillation device, the monitoring computer configured to correlate the ECG signals of the patient with the patient activity data generated from the one or more accelerometers to determine ECG signal contamination, analyze the ECG signals of the patient to extract at least heart rate data of the patient, determine from at least the heart rate data and the patient activity data that a treatable arrhythmia condition exists, increase or decrease a confidence in a determined treatable arrhythmia condition based on the determined ECG signal contamination by evaluating the patient activity data for a change in body state during detection of the treatable arrhythmia condition, wherein increasing or decreasing a confidence in the detected treatable arrhythmia condition comprises determining that the patient is unconscious if there has been no change in patient body state during the detection of the treatable arrhythmia condition, decreasing the confidence in the detected treatable arrhythmia condition based on determining that the patient is conscious, and increasing the confidence in the detected treatable arrhythmia condition based on determining that the patient is unconscious, and responsive to an increase in the confidence in the determined treatable arrhythmia condition, deliver a therapeutic shock to the patient through the one or more therapy pads; wherein at least the patient activity data and the heart rate data are further analyzed to determine a change in a physiological condition of the patient over a period of time. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A method of monitoring a patient, the method comprising:
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sensing ECG signals of the patient; generating patient activity data based on signals from one or more accelerometers, the signals corresponding to changes in the patient'"'"'s body position and movement; correlating the ECG signals of the patient with the patient activity data to determine ECG signal contamination; analyzing the ECG signals of the patient to extract at least heart rate data of the patient and detect a cardiac arrhythmia based at least in part on the heart rate data; changing a confidence in the detected cardiac arrhythmia based on the determined ECG signal contamination by evaluating the patient activity data for a change in body state during the detection of the cardiac arrhythmia, wherein changing a confidence in the detected cardiac arrhythmia comprises determining that the patient is unconscious if there has been no change in patient body state during the detection of the cardiac arrhythmia, and increasing the confidence in the detected cardiac arrhythmia based on determining that the patient is unconscious, and determining that the patient is conscious if there has been a change in patient body state during the detection of the cardiac arrhythmia, and decreasing the confidence in the detected cardiac arrhythmia based on determining that the patient is conscious; and analyzing at least the patient activity data and the heart rate data to determine a change in a physiological condition of the patient over a period of time. - View Dependent Claims (18, 19)
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Specification