IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0559422
(2009-09-14)
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등록번호 |
US-8545417
(2013-10-01)
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발명자
/ 주소 |
- Banet, Matt
- McCombie, Devin
- Dhillon, Marshal
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
16 인용 특허 :
201 |
초록
▼
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 which is selected from the group consisting of an impedance pneumography sensor, an ECG sensor, and a PPG sensor; and a motion s
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 which is selected from the group consisting of an impedance pneumography sensor, an ECG sensor, and a PPG sensor; and a motion sensor (e.g., an accelerometer) configured to attach to the patient's torso and measure therefrom a motion signal. The system further comprises (iii) a processing system, configured to operably connect to the first and motion sensors, and to determine a respiration rate value by applying filter parameters obtained from the first sensor signals to the motion sensor signals.
대표청구항
▼
1. A system for monitoring a patient's respiratory rate, comprising: a first sensor selected from the group consisting of: i) an impedance pneumography sensor comprising at least two electrodes and an impedance pneumography processing circuit configured to process signals from the two electrodes to
1. A system for monitoring a patient's respiratory rate, comprising: a first sensor selected from the group consisting of: i) an impedance pneumography sensor comprising at least two electrodes and an impedance pneumography processing circuit configured to process signals from the two electrodes to measure an impedance pneumography signal from the patient; ii) an ECG sensor comprising at least two electrodes and an ECG processing circuit configured to process signals from the two electrodes to measure an ECG signal from the patient; and iii) a PPG sensor comprising a light source, photodetector, and PPG processing circuit configured to process signals from the photodetector to measure a PPG signal from the patient;a second sensor comprising a motion sensor configured to attach to the patient's torso and measure a motion signal from the patient;a processing system configured to be worn on the patient's body and connect to the first sensor to receive a first signal representing at least one of the impedance pneumography, ECG, and PPG signals, and connect to the second sensor to receive a second signal representing the motion signal, the processing system configured to collectively process both the first and second signals to determine the patient's respiratory rate by determining an initial respiratory rate estimate using the first signal, determining a filtering function using the initial respiratory rate estimate, applying the filtering function to the second signal to provide a filtered motion waveform indicative of respiratory movements of the patient's torso, and processing the filtered motion waveform to determine the respiratory rate of the patient. 2. The system of claim 1, wherein the first sensor is an impedance pneumography sensor. 3. The system of claim 2, wherein the impedance pneumography signal comprises a first series of pulses, with each pulse in the first series representing a respiratory event. 4. The system of claim 3, wherein the motion signal comprises a second series of pulses, with each pulse in the second series representing a respiratory event. 5. The system of claim 4, wherein determining an initial respiratory rate estimate using the first signal comprises counting each pulse in the first series of pulses, and wherein processing the filtered motion waveform to determine the respiratory rate of the patient comprises counting each pulse in the second series of pulses. 6. The system of claim 1, wherein the motion sensor is an accelerometer. 7. The system of claim 1, wherein the first sensor is an ECG sensor. 8. The system of claim 7, wherein the ECG signal comprises a first series of pulses with amplitudes characterized by a time-varying envelope, with a frequency of the envelope representing a respiratory rate. 9. The system of claim 8, wherein the motion signal comprises a second series of pulses, with each pulse in the second series representing a respiratory event. 10. The system of claim 9, wherein determining an initial respiratory rate estimate using the first signal comprises determining the frequency of the time-varying envelope, and wherein processing the filtered motion waveform to determine the respiratory rate of the patient comprises counting each pulse in the second series of pulses. 11. The system of claim 1, wherein the first sensor is a PPG sensor. 12. The system of claim 11, wherein the PPG signal comprises a first series of pulses with amplitudes characterized by a time-varying envelope, with a frequency of the envelope representing a respiratory rate. 13. The system of claim 12, wherein the motion signal comprises a second series of pulses, with each pulse in the second series representing a respiratory event. 14. The system of claim 13, wherein determining an initial respiratory rate estimate using the first signal comprises determining the frequency of the time-varying envelope, and wherein processing the filtered motion waveform to determine the respiratory rate of the patient comprises counting each pulse in the second series of pulses.
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