Diagnosis, monitoring, and treatment of respiratory disorders

A system comprising:

• a flow rate sensor configured to generate signals representing a respiratory flow rate of a patient;
• and
• a computing device including one or more processors, the computing device configured to:
• extract inspiratory portions of breaths of a patient from the generated respiratory flow rate signals,
• extract shape information from the inspiratory portions,
• calculate difference-based local binary pattern (DLBP) feature vectors representative of the inspiratory portions, wherein the calculating comprises:
• comparing each of a plurality of samples of the inspiratory portions with adjacent samples to determine differences between the samples, and
• assigning a DLBP code to each of the samples of the inspiratory portions based on the differences,
• apply labels to the inspiratory portions based on the DLBP feature vectors, wherein the labels indicate whether the inspiratory portions are flow limited,
• compute a metric indicating a degree of inspiratory flow limitation of the patient based on the labels applied to the inspiratory portions, and
• adjust a treatment pressure of a respiratory pressure therapy being delivered to the patient by a respiratory pressure therapy device based on the labels applied to the inspiratory portions.

A method comprising:

• extracting inspiratory portions of breaths of a patient from respiratory flow rate signal of the patient signals generated by a flow rate sensor;
• extract shape information from the inspiratory portions;
• calculating difference-based local binary pattern (DLBP) feature vectors representative of the inspiratory portions, wherein the calculating comprises:
• comparing each of a plurality of samples of the inspiratory portions with adjacent samples to determine differences between the samples, and
• assigning a DLBP code to each of the samples of the inspiratory portions based on the differences,
• apply labels to the inspiratory portions based on the DLBP feature vectors, wherein the labels indicate whether the inspiratory portions are flow limited, and
• controlling adjustment of a treatment pressure of respiratory pressure therapy being delivered to the patient by a respiratory pressure therapy device based on the labels applied to the inspiratory portions.

A system comprising:

• a respiratory pressure therapy device configured to deliver respiratory pressure therapy to a patient via a patient interface over an air circuit, the patient interface configured to sealingly engage an entrance to an airway of the patient, the air circuit in communication with the patient interface, the respiratory pressure therapy device comprising:
• a pressure generator configured to generate a supply of air at positive pressure to the air circuit;
• a flow rate sensor configured to generate signals representing a respiratory flow rate of the patient;
• and
• a controller configured to:
• extract inspiratory portions of a breaths of the patient from the generated respiratory flow rate signals,
• extract shape information from the inspiratory portions,
• calculate difference-based local binary pattern (DLBP) feature vectors representative of the inspiratory portions, wherein the calculating comprises:
• comparing each of a plurality of samples of the inspiratory portions with adjacent samples to determine differences between the samples, and
• assigning a DLBP code to each of the samples of the inspiratory portions based on the differences,
• apply labels to the inspiratory portions based on the DLBP feature vectors, wherein the labels indicate whether the inspiratory portions are flow limited, and
• control the pressure generator to adjust a treatment pressure of the respiratory pressure therapy based on the labels applied to the inspiratory portions.