Body-worn monitor for measuring respiration rate
First Claim
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1. A body-worn system for monitoring respiratory rate from a patient, comprising:
- a housing configured to be mounted on the patient'"'"'s torso;
an impedance pneumography system contained within the housing comprising;
i) a connecting portion configured to connect to a plurality of electrodes configured to be worn on the patient;
ii) a differential amplifier configured to receive electrical signals from each of the plurality of electrodes and process them to generate an analog impedance pneumography signal; and
iii) an analog-to-digital converter configured to convert the analog impedance pneumography signal into a digital impedance pneumography signal;
an accelerometer system contained within the housing comprising;
i) an accelerometer configured to generate an analog motion signal indicating movement of the chest or abdomen; and
ii) analog-to-digital converter configured to convert the analog motion signal into a digital motion signal;
a transceiver component contained within the housing configured to transmit the digital impedance pneumography signal and the digital motion signal according to a controller area network (CAN) communication protocol via a cable electrically connected thereto; and
a processing system configured to be mounted on the patient'"'"'s wrist, the processing system comprising a processor and a CAN transceiver in electrical communication with the cable and configured to receive and collectively process the digital impedance pneumography and digital motion signals to determine the patient'"'"'s respiratory rate.
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Abstract
The invention provides a multi-sensor system for monitoring a patient'"'"'s respiratory rate. The system features an impedance pneumography sensor featuring at least two electrodes and a processing circuit configured to measure an impedance pneumography signal and a 3 axis accelerometer) that attaches to the patient'"'"'s torso and measures an ACC signal indicating movement of the chest or abdomen that is also sensitive to respiratory rate. The signals are collectively processed, e.g. with the adaptive filter to determine a value for the respiratory rate.
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Citations
13 Claims
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1. A body-worn system for monitoring respiratory rate from a patient, comprising:
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a housing configured to be mounted on the patient'"'"'s torso; an impedance pneumography system contained within the housing comprising;
i) a connecting portion configured to connect to a plurality of electrodes configured to be worn on the patient;
ii) a differential amplifier configured to receive electrical signals from each of the plurality of electrodes and process them to generate an analog impedance pneumography signal; and
iii) an analog-to-digital converter configured to convert the analog impedance pneumography signal into a digital impedance pneumography signal;an accelerometer system contained within the housing comprising;
i) an accelerometer configured to generate an analog motion signal indicating movement of the chest or abdomen; and
ii) analog-to-digital converter configured to convert the analog motion signal into a digital motion signal;a transceiver component contained within the housing configured to transmit the digital impedance pneumography signal and the digital motion signal according to a controller area network (CAN) communication protocol via a cable electrically connected thereto; and a processing system configured to be mounted on the patient'"'"'s wrist, the processing system comprising a processor and a CAN transceiver in electrical communication with the cable and configured to receive and collectively process the digital impedance pneumography and digital motion signals to determine the patient'"'"'s respiratory rate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification