Self-authenticating electrocardiography monitoring circuit
First Claim
1. An extended wear electrocardiography and physiological sensor monitor recorder with self-authenticating electrocardiography monitoring circuit, comprising:
- a sealed housing adapted to be removably secured into a non-conductive receptacle on a disposable extended wear electrode patch; and
an electronic circuitry comprised within the sealed housing, comprising;
an externally-powered micro-controller operable to execute under micro programmable control and to write use data comprising ECG data into a memory provided on the disposable extended wear electrode patch, to measure an amount of the use data written into the memory, and to determine an expiration of the disposable extended wear electrode patch once the amount reaches a predetermined threshold;
an electrocardiographic front end circuit electrically interfaced to the micro-controller and operable to sense electrocardiographic signals through electrocardiographic electrodes provided on the disposable extended wear electrode patch; and
an externally-powered flash memory electrically interfaced with the micro-controller and operable to store samples of the electrocardiographic signals.
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Accused Products
Abstract
Physiological monitoring can be provided through a wearable monitor that includes two components, a flexible extended wear electrode patch and a removable reusable monitor recorder. 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 (or immediately to either side of the sternum) benefits extended wear by removing the requirement that ECG electrodes be continually placed in the same spots on the skin throughout the monitoring period. Instead, the patient can place an electrode patch anywhere within the general region of the sternum. Ensuring that the quality level of ECG recording remains constant over an extended period of time is provided through self-authentication of electrode patches. The monitor recorder implements a challenge response scheme upon being connected to an electrode patch. Failing self-authentication, the monitor recorder signals an error condition.
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Citations
18 Claims
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1. An extended wear electrocardiography and physiological sensor monitor recorder with self-authenticating electrocardiography monitoring circuit, comprising:
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a sealed housing adapted to be removably secured into a non-conductive receptacle on a disposable extended wear electrode patch; and an electronic circuitry comprised within the sealed housing, comprising; an externally-powered micro-controller operable to execute under micro programmable control and to write use data comprising ECG data into a memory provided on the disposable extended wear electrode patch, to measure an amount of the use data written into the memory, and to determine an expiration of the disposable extended wear electrode patch once the amount reaches a predetermined threshold; an electrocardiographic front end circuit electrically interfaced to the micro-controller and operable to sense electrocardiographic signals through electrocardiographic electrodes provided on the disposable extended wear electrode patch; and an externally-powered flash memory electrically interfaced with the micro-controller and operable to store samples of the electrocardiographic signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An extended wear electrocardiography and physiological sensor monitor with self-authenticating electrocardiography monitoring circuit, comprising:
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a disposable extended wear electrode patch comprising; a flexible backing formed of an elongated strip of stretchable material with a narrow longitudinal midsection and, on each end, a contact surface at least partially coated with an adhesive dressing provided as a crimp relief; a pair of electrocardiographic electrodes conductively exposed on the contact surface of each end of the elongated strip, respectively; a non-conductive receptacle adhered to an outward-facing surface of the elongated strip and comprising a plurality of electrical pads; a flexible circuit affixed on each end of the elongated strip as a strain relief and comprising a pair of circuit traces electrically coupled to the pair of the electrocardiographic electrodes and a pair of the electrical pads; and a cryptographic circuit electrically coupled to another pair of the electrical pads; and a reusable electrocardiography monitor having a sealed housing adapted to be removably secured into the non-conductive receptacle and comprising; a micro-controller operable to execute under micro programmable control and electrically interfaced to an electrocardiographic front end circuit that is operable to sense electrocardiographic signals through the electrocardiographic electrodes via the pair of the electrical pads, the micro-controller further operable to authenticate the disposable extended wear electrode patch through the cryptographic circuit via the another pair of the electrical pads, to write use data comprising the electrocardiographic signals into memory of the cryptographic circuit of the disposable extended wear patch, and to determine an expiration of the disposable extended wear electrode patch once an amount of the use data reaches a predetermined threshold; and a flash memory electrically interfaced with the micro-controller and operable to store samples of the electrocardiographic signals. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification