BODY-WORN SYSTEM FOR MEASURING CONTINUOUS NON-INVASIVE BLOOD PRESSURE (cNIBP)
First Claim
1. A system for measuring a vital sign value from a patient, comprising:
- (a) a first sensor configured to generate a first time-dependent signal indicative of one or more contractile properties of the patient'"'"'s heart;
(b) a second sensor configured to generate a second time-dependent signal indicative of one or more contractile properties of the patient'"'"'s heart, the second sensor comprising a radiation source configured to irradiate a portion of the patient, and a detector configured to detect radiation emitted from the radiation source after it passes through the portion of the patient, the detector comprising at least two pixel elements, each configured to generate a unique signal;
(c) a motion sensor configured to generate a motion signal indicative of movement of a region of the patient that the motion sensor is attached to; and
,(d) a processing component configured to be worn on the patient'"'"'s body, the processing component programmed to;
(i) analyze a signal generated by a first pixel element;
(ii) analyze a signal generated by a second pixel element;
(iii) analyze the motion signal;
(iv) based on analysis of the motion signal, select a signal from at least one of the pixel elements characterized by a relatively low degree of motion corruption; and
(v) analyze the signal from (iv) to determine a vital sign value.
1 Assignment
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Accused Products
Abstract
The present invention provides a technique for continuous measurement of blood pressure based on pulse transit time and which does not require any external calibration. This technique, referred to herein as the ‘Composite Method’, is carried out with a body-worn monitor that measures blood pressure and other vital signs, and wirelessly transmits them to a remote monitor. A network of body-worn sensors, typically placed on the patient'"'"'s right arm and chest, connect to the body-worn monitor and measure time-dependent ECG, PPG, accelerometer, and pressure waveforms. The disposable sensors can include a cuff that features an inflatable bladder coupled to a pressure sensor, three or more electrical sensors (e.g. electrodes), three or more accelerometers, a temperature sensor, and an optical sensor (e.g., a light source and photodiode) attached to the patient'"'"'s thumb.
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Citations
1 Claim
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1. A system for measuring a vital sign value from a patient, comprising:
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(a) a first sensor configured to generate a first time-dependent signal indicative of one or more contractile properties of the patient'"'"'s heart; (b) a second sensor configured to generate a second time-dependent signal indicative of one or more contractile properties of the patient'"'"'s heart, the second sensor comprising a radiation source configured to irradiate a portion of the patient, and a detector configured to detect radiation emitted from the radiation source after it passes through the portion of the patient, the detector comprising at least two pixel elements, each configured to generate a unique signal; (c) a motion sensor configured to generate a motion signal indicative of movement of a region of the patient that the motion sensor is attached to; and
,(d) a processing component configured to be worn on the patient'"'"'s body, the processing component programmed to;
(i) analyze a signal generated by a first pixel element;
(ii) analyze a signal generated by a second pixel element;
(iii) analyze the motion signal;
(iv) based on analysis of the motion signal, select a signal from at least one of the pixel elements characterized by a relatively low degree of motion corruption; and
(v) analyze the signal from (iv) to determine a vital sign value.
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Specification