Systems, methods, and/or apparatuses for non-invasive monitoring of respiratory parameters in sleep disordered breathing

A method for monitoring cardiorespiratory data associated with sleep disordered breathing, said method comprising:

• deriving a pulse oximeter signal from a patient;
• processing the pulse oximeter signal to generate a patient effort signal indicative of respiratory rate;
• measuring and/or monitoring the patient's autonomic improvement in response to therapy;
• extracting patient-ventilator asynchrony from the patient effort signal;
• and
• generating an index based on the patient effort signal and the patient's autonomic improvement in response to therapy.

A respiratory effort monitoring apparatus, comprising:

• a controllable flow generator operable to generate a supply of pressurized breathable gas to be provided to a patient for treatment;
• a pulse oximeter configured to determine a measure of patient effort during a treatment period and provide a patient effort signal for input to control operation of the flow generator;
• and
• a controller to extract patient-ventilator asynchrony from the patient effort signal, and to measure and/or monitor the patient's autonomic improvement in response to therapy,
• wherein an index is generated based on the patient effort signal and the patient's autonomic improvement in response to therapy.