System for determining confidence in respiratory rate measurements
First Claim
1. A method of analyzing respiratory rate monitoring parameters to determine confidence in a measured respiratory rate, the method comprising:
- obtaining, with a processor, a first respiratory rate measurement from a patient from an acoustic respiratory signal;
obtaining, with the processor, a second respiratory rate measurement from the patient from at least one non-acoustic physiological signal;
calculating, with the processor, a confidence associated with the first respiratory rate measurement based at least on a comparison between the first and second respiratory rate measurements and reflecting a degree to which the first and second respiratory rate measurements correspond to each other, wherein said calculating comprises calculating a relatively higher confidence when the first and second respiratory rate measurements have a relatively higher degree of correspondence to each other and a relatively lower confidence when the first and second respiratory rate measurements have a relatively lower degree of correspondence to each other; and
displaying, with a display, safety zones together with a visual confidence indicator responsive to the confidence, the visual confidence indicator comprising a probability distribution having a peak corresponding to at least one of the first and second respiratory rate measurements and a distribution dispersion depending at least on the confidence,wherein a visual position of the visual confidence indicator with respect to the safety zones reflects a degree of safety risk to the patient.
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Abstract
This disclosure describes, among other features, systems and methods for using multiple physiological parameter inputs to determine multiparameter confidence in respiratory rate measurements. For example, a patient monitoring system can programmatically determine multiparameter confidence in respiratory rate measurements obtained from an acoustic sensor based at least partly on inputs obtained from other non-acoustic sensors or monitors. The patient monitoring system can output a multiparameter confidence indication reflective of the programmatically-determined multiparameter confidence. The multiparameter confidence indication can assist a clinician in determining whether or how to treat a patient based on the patient'"'"'s respiratory rate.
963 Citations
32 Claims
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1. A method of analyzing respiratory rate monitoring parameters to determine confidence in a measured respiratory rate, the method comprising:
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obtaining, with a processor, a first respiratory rate measurement from a patient from an acoustic respiratory signal; obtaining, with the processor, a second respiratory rate measurement from the patient from at least one non-acoustic physiological signal; calculating, with the processor, a confidence associated with the first respiratory rate measurement based at least on a comparison between the first and second respiratory rate measurements and reflecting a degree to which the first and second respiratory rate measurements correspond to each other, wherein said calculating comprises calculating a relatively higher confidence when the first and second respiratory rate measurements have a relatively higher degree of correspondence to each other and a relatively lower confidence when the first and second respiratory rate measurements have a relatively lower degree of correspondence to each other; and displaying, with a display, safety zones together with a visual confidence indicator responsive to the confidence, the visual confidence indicator comprising a probability distribution having a peak corresponding to at least one of the first and second respiratory rate measurements and a distribution dispersion depending at least on the confidence, wherein a visual position of the visual confidence indicator with respect to the safety zones reflects a degree of safety risk to the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A system for determining multiparameter confidence in a respiratory rate measurement from a medical patient, the system comprising:
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an optical sensor comprising; a light emitter configured to impinge light on body tissue of a living patient, the body tissue comprising pulsating blood, and a detector responsive to the light after attenuation by the body tissue, wherein the detector is configured to generate a photoplethysmographic signal indicative of a physiological characteristic of the living patient; an ECG sensor configured to obtain an electrical signal from the living patient; an acoustic sensor, the acoustic sensor configured to obtain an acoustic respiratory signal from the living patient; and a processor configured to; derive a first respiratory rate measurement from the acoustic respiratory signal, derive a second respiratory rate measurement from one or both of the photoplethysmographic signal and the electrical signal, use the second respiratory rate measurement to calculate a confidence associated with the first respiratory rate measurement, the confidence indicating a degree to which the first respiratory rate measurement accurately reflects a respiratory rate of the living patient, and output instructions for displaying safety zones together with a confidence indicator responsive to the confidence to a display, the confidence indicator comprising a probability distribution having a peak corresponding to at least one of the first and second respiratory rate measurements and a distribution dispersion depending at least on the confidence, wherein a visual position on the display of the confidence indicator with respect to the safety zones reflects a degree of safety risk to the living patient. - View Dependent Claims (17, 18, 19, 20)
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21. A system for determining confidence in a respiratory rate measurement from a medical patient, the system comprising:
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a first physiological sensor configured to obtain a physiological signal from a living patient, the first physiological sensor comprising at least one of the following;
an ECG sensor, a bioimpedance sensor, a capnography sensor, and an optical sensor;an acoustic sensor configured to obtain an acoustic respiratory signal from the living patient; and a processor configured to; obtain a first respiratory rate measurement from the physiological signal, obtain a second respiratory rate measurement from the acoustic respiratory signal, and calculate a confidence associated with the first respiratory rate measurement based at least on a comparison between the first and second respiratory rate measurements and reflecting a degree to which the first and second respiratory rate measurements correspond to each other; and a display configured to output a safety spectrum together with a confidence indicator responsive to the confidence, the confidence indicator comprising a probability distribution having a peak corresponding to at least one of the first and second respiratory rate measurements and a distribution dispersion depending at least on the confidence; wherein a visual position on the display of the confidence indicator with respect to the safety spectrum reflects a degree of safety risk to the living patient. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A method of analyzing respiratory rate monitoring parameters to determine confidence in a measured respiratory rate, the method comprising:
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obtaining, with a processor, a first rate respiratory measurement from a first physiological device, the first physiological device comprising an acoustic sensor; obtaining, with the processor, a second rate respiratory measurement from a second physiological device; determining, with the processor, a multiparameter confidence measure associated with the first respiratory measurement based at least on a comparison between the first and second respiratory rate measurements and reflecting a degree to which the first and second respiratory rate measurements correspond to each other, wherein said determining comprises determining a relatively higher multiparameter confidence measure when the first and second respiratory rate measurements have a relatively higher degree of correspondence to each other and a relatively lower multiparameter confidence measure when the first and second respiratory rate measurements have a relatively lower degree of correspondence to each other; and displaying, with a display, a safety spectrum together with a visual confidence indicator reflecting the multiparameter confidence measure, the visual confidence indicator comprising a probability distribution having a peak corresponding to at least one of the first and second respiratory rate measurements and a distribution dispersion depending at least on the multiparameter confidence measure, wherein a visual position of the visual confidence indicator with respect to the safety spectrum reflects a degree of safety risk to a patient.
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Specification