Ambulatory Electrocardiography Monitor Recorder Optimized For Internal Signal Processing
First Claim
1. An ambulatory electrocardiography monitor recorder optimized for internal signal processing, comprising:
- a wearable housing adapted to be coupled to a pair of electrocardiographic electrodes that are fitted for dermal placement along the sternal midline; and
an electronic circuitry provided within the wearable housing and comprising;
an electrocardiographic front end circuit under the control of a microcontroller and configured to output electrocardiographic signals representative of cardiac activation wave front amplitudes, comprising;
a signal lead operable to sense cardiac electrical potentials dermally through one of the electrocardiographic electrodes;
a reference lead operable to sense cardiac electrical potentials dermally through the other of the electrocardiographic electrodes;
an operational amplifier that amplifies a current of the sensed electrocardiographic potentials;
a high pass filter that is applied to the electrocardiographic potentials whose current was amplified by the operational amplifier;
a further operational amplifier that amplifies voltage of the electrocardiographic potentials filtered by the high pass filter; and
an anti-aliasing filter applied to the electrocardiographic potentials with the amplified voltage prior to the output of the electrocardiographic potentials as the electrocardiographic signals;
a low power microcontroller operable to execute over an extended period under modular micro program control as specified in firmware and further operable to acquire samples of the output electrocardiographic signals; and
a non-volatile memory electrically interfaced with the microcontroller and operable to continuously store the samples of the electrocardiographic signals throughout the extended period.
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Accused Products
Abstract
Physiological monitoring can be provided through a lightweight wearable monitor that includes two components, a flexible extended wear electrode patch and a reusable monitor recorder that removably snaps into a receptacle on the electrode patch. The wearable monitor sits centrally (in the midline) on the patient'"'"'s chest along the sternum oriented top-to-bottom. The placement of the wearable monitor in a location at the sternal midline, with its unique narrow “hourglass”-like shape, significantly improves the ability of the wearable monitor to cutaneously sense cardiac electrical potential signals, particularly the P-wave and, to a lesser extent, the QRS interval signals indicating ventricular activity in the ECG waveforms. Additionally, the monitor recorder includes an ECG sensing circuit that measures raw cutaneous electrical signals and performs signal processing prior to outputting the processed signals for sampling and storage.
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Citations
20 Claims
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1. An ambulatory electrocardiography monitor recorder optimized for internal signal processing, comprising:
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a wearable housing adapted to be coupled to a pair of electrocardiographic electrodes that are fitted for dermal placement along the sternal midline; and an electronic circuitry provided within the wearable housing and comprising; an electrocardiographic front end circuit under the control of a microcontroller and configured to output electrocardiographic signals representative of cardiac activation wave front amplitudes, comprising; a signal lead operable to sense cardiac electrical potentials dermally through one of the electrocardiographic electrodes; a reference lead operable to sense cardiac electrical potentials dermally through the other of the electrocardiographic electrodes; an operational amplifier that amplifies a current of the sensed electrocardiographic potentials; a high pass filter that is applied to the electrocardiographic potentials whose current was amplified by the operational amplifier; a further operational amplifier that amplifies voltage of the electrocardiographic potentials filtered by the high pass filter; and an anti-aliasing filter applied to the electrocardiographic potentials with the amplified voltage prior to the output of the electrocardiographic potentials as the electrocardiographic signals; a low power microcontroller operable to execute over an extended period under modular micro program control as specified in firmware and further operable to acquire samples of the output electrocardiographic signals; and a non-volatile memory electrically interfaced with the microcontroller and operable to continuously store the samples of the electrocardiographic signals throughout the extended period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An ambulatory electrocardiography monitor optimized for internal signal processing, comprising:
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a disposable extended wear electrode patch, comprising; a flexible backing comprising stretchable material defined as an elongated strip with a narrow longitudinal midsection, each end of the flexible backing comprising an adhesive contact surface adapted to serve as a crimp relief; a pair of electrocardiographic electrodes comprised on the contact surface of each end of the flexible backing, each electrocardiographic electrode conductively exposed for dermal adhesion and adapted to be positioned axially along the midline of the sternum for capturing action potential propagation, one of the electrocardiographic electrodes comprising a protection circuit; a non-conductive receptacle affixed to a non-contacting surface of the flexible backing and comprising an electro mechanical docking interface; and a pair of flexible circuit traces affixed at each end of the flexible backing with each circuit trace connecting one of the electrocardiographic electrodes to the docking interface; and an ambulatory electrocardiography monitor recorder, comprising; a wearable housing adapted to securely fit into the receptacle; and electronic circuitry provided within the wearable housing and comprising; an electrocardiographic front end circuit under the control of a microcontroller and configured to output electrocardiographic signals representative of cardiac activation wave front amplitudes, comprising; a signal lead operable to sense cardiac electrical potentials dermally through one of the electrocardiographic electrodes; a reference lead operable to sense cardiac electrical potentials dermally through the other of the electrocardiographic electrodes; an operational amplifier that amplifies a current of the sensed electrocardiographic potentials; a high pass filter that is applied to the electrocardiographic potentials whose current was amplified by the operational amplifier; a further operational amplifier that amplifies voltage of the electrocardiographic potentials filtered by the high pass filter; and an anti-aliasing filter applied to the electrocardiographic potentials with the amplified voltage prior to the output of the electrocardiographic potentials as the electrocardiographic signals; a low power microcontroller operable to execute over an extended period under modular micro program control as specified in firmware and further operable to acquire samples of the output electrocardiographic signals; and a non-volatile memory electrically interfaced with the microcontroller and operable to continuously store the samples of the electrocardiographic signals throughout the extended period. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification