Pattern recognition system for quantifying the likelihood of the contribution of multiple possible forms of chronic disease to patient reported dyspnea
First Claim
1. A system for characterizing contributions of physiological conditions to dyspnea in a patient, the system comprising:
- a flow sensor configured to sense a respiratory flow of the patient;
an analyzer configured to determine a composition of at least a portion of the respiratory flow of the patient;
a computing device configured to;
receive heart rate data and gas exchange measurements, wherein the gas exchange measurements are based on breath-by-breath data captured by the flow sensor and the analyzer during a gas exchange test that includes at least a rest phase and an exercise phase;
repeatedly evaluate one or more of a respiratory exchange rate based on the received gas exchange measurements and a heart rate based on the received heart rate data on a breath-by-breath basis to determine when a predetermined target metric corresponding to exertion level is reached;
determine a plurality of contribution values that are each associated with a different physiological condition, wherein the plurality of contribution values are numeric values based on the gas exchange measurements captured on the breath-by-breath basis during the rest phase and the exercise phase and each of the plurality of contribution values corresponds to a likelihood that the associated physiological condition contributes to dyspnea in the patient; and
output the plurality of contribution values.
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Accused Products
Abstract
Systems and methods for quantifying the likelihood of the contribution of multiple possible forms of chronic disease to patient reported dyspnea can include the testing protocol having a flow/volume loop, performed at rest, flowed by the measurement of cardiopulmonary exercise gas exchange variables during rest, exercise and recovery as unique data sets. The data sets are analyzed using feature extraction steps to produce a pictorial image consisting of disease silos displaying the likelihood of the contribution of various chronic diseases to patient reported dyspnea. In some embodiments, the silos are split into subclass silos. In some embodiments, multiple chronic disease indexes are used to differentiate between sub-types of a particular chronic disease (e.g., differentiating WHO 1 PH from WHO 2 or WHO 3 PH). Test results are plotted serially to asses to provide feedback to the physician on the efficacy of therapy provided to the patient.
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Citations
16 Claims
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1. A system for characterizing contributions of physiological conditions to dyspnea in a patient, the system comprising:
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a flow sensor configured to sense a respiratory flow of the patient; an analyzer configured to determine a composition of at least a portion of the respiratory flow of the patient; a computing device configured to; receive heart rate data and gas exchange measurements, wherein the gas exchange measurements are based on breath-by-breath data captured by the flow sensor and the analyzer during a gas exchange test that includes at least a rest phase and an exercise phase; repeatedly evaluate one or more of a respiratory exchange rate based on the received gas exchange measurements and a heart rate based on the received heart rate data on a breath-by-breath basis to determine when a predetermined target metric corresponding to exertion level is reached; determine a plurality of contribution values that are each associated with a different physiological condition, wherein the plurality of contribution values are numeric values based on the gas exchange measurements captured on the breath-by-breath basis during the rest phase and the exercise phase and each of the plurality of contribution values corresponds to a likelihood that the associated physiological condition contributes to dyspnea in the patient; and output the plurality of contribution values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification