BODY-WORN MONITOR FOR MEASURING RESPIRATION RATE
First Claim
1. A system for monitoring a patient'"'"'s respiratory rate, comprising:
- a sensor unit configured to be mounted on the patient'"'"'s torso and comprising;
a first connector operably connected to an impedance pneumography circuit and configured to connect directly to a first electrode attached to the patient;
a first cable operably connected to the impedance pneumography circuit and configured to connect a second electrode attached to the patient;
an impedance pneumography circuit configured to receive electrical signals from the first and second electrodes and process them to generate an impedance pneumography signal representing the patient'"'"'s respiratory rate;
a motion sensor configured to generate a motion signal representing the patient'"'"'s respiratory rate;
a processing system configured to receive the impedance pneumography and motion signals and collectively process them to determine the patient'"'"'s respiratory rate; and
a transceiver system configured to receive a value for respiratory rate and transmit it to a remote system.
2 Assignments
0 Petitions
Accused Products
Abstract
The invention provides a multi-sensor system that uses an algorithm based on adaptive filtering to monitor a patient'"'"'s respiratory rate. The system features a first sensor selected from the following group: i) an impedance pneumography sensor featuring at least two electrodes and a processing circuit configured to measure an impedance pneumography signal; ii) an ECG sensor featuring at least two electrodes and an ECG processing circuit configured to measure an ECG signal; and iii) a PPG sensor featuring a light source, photodetector, and PPG processing circuit configured to measure a PPG signal. Each of these sensors measures a time-dependent signal which is sensitive to respiratory rate and, during operation, is processed to determine an initial respiratory rate value. An adaptive digital filter is determined from the initial respiratory rate. The system features a second sensor (e.g. a digital 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. This second signal is processed with the adaptive filter to determine a final value for respiratory rate.
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Citations
21 Claims
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1. A system for monitoring a patient'"'"'s respiratory rate, comprising:
a sensor unit configured to be mounted on the patient'"'"'s torso and comprising; a first connector operably connected to an impedance pneumography circuit and configured to connect directly to a first electrode attached to the patient; a first cable operably connected to the impedance pneumography circuit and configured to connect a second electrode attached to the patient; an impedance pneumography circuit configured to receive electrical signals from the first and second electrodes and process them to generate an impedance pneumography signal representing the patient'"'"'s respiratory rate; a motion sensor configured to generate a motion signal representing the patient'"'"'s respiratory rate; a processing system configured to receive the impedance pneumography and motion signals and collectively process them to determine the patient'"'"'s respiratory rate; and a transceiver system configured to receive a value for respiratory rate and transmit it to a remote system. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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2. A system for monitoring a patient'"'"'s respiratory rate, comprising:
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an impedance pneumography sensor connected directly through a connector to a first electrode, and connected through a cable to a second electrode, the impedance pneumography sensor configured to receive electrical signals from the first and second electrodes and process them to generate an impedance pneumography signal representing the patient'"'"'s respiratory rate; a motion sensor configured to generate a motion signal representing the patient'"'"'s respiratory rate; a processing system configured to be worn on the patient'"'"'s body and receive the impedance pneumography and motion signals and collectively process them to determine the patient'"'"'s respiratory rate; and a housing connected to the connector and attached the patient'"'"'s body by the first electrode, the housing configured to cover the impedance pneumography sensor, motion sensor, and the processing system.
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Specification