Method and apparatus for continuous management of airway pressure for detection and/or prediction of respiratory failure
AssigneeNovaResp Technologies Inc.
InventorsHamed Hanafialamdari, Klaus Michael Schmidt
Life of this patent
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Abstract
Various embodiments are described herein for a controller for controlling the operation of a breathing assistance device that provides breathing assistance to a user. The controller comprises a processor that generates a respiratory index value that is determined during a current monitoring time period to detect a respiratory failure, or predict the respiratory failure when at least one PSG signal is measured. The respiratory index value is compared to a threshold to determine if the control signal needs to be updated to reduce or eliminate respiratory failure that the user is currently experiencing or to prevent a predicted respiratory failure from occurring.
Claims34
A controller for controlling the operation of a breathing assistance device that provides breathing assistance to a user, wherein the controller comprises:
- an input for receiving sensor data to measure at least one airflow parameter of the user's airflow and optionally one Polysomnography (PSG) data to measure at least one PSG parameter;
- and
- a processor that is electronically coupled to the input to receive the sensor data and optionally the PSG data, the processor being configured to perform the measurements and to generate a control signal for the breathing assistance device for a current monitoring time period by:
- generating a respiratory index value that is determined during the current monitoring time period to predict the respiratory failure for the user by:
- determining, when measuring the PSG data, a current weighted respiratory status value based on weighting a reactance and a resistance for the user's respiratory system determined from the measured airflow parameters for the current monitoring time period to generate a first index value;
- generating a second index value that is determined from at least one PSG signal for the current monitoring time period;
- and generating the respiratory index value from the first and second index values or determining the respiratory index value based on a relative power spectral density between a current time period and a baseline period for a physiological respiratory signal;
- updating the control signal when the comparison of the respiratory index value to a threshold value indicates that the respiratory failure is detected or is predicted to occur and otherwise maintaining the control signal at a previous setting;
- and
- sending the control signal to the breathing assistance device to adjust the operation of the breathing assistance device during use.
(canceled)
A controller for controlling the operation of a breathing assistance device that provides breathing assistance to a user, wherein the controller comprises:
- an input for receiving sensor data to measure at least one airflow parameter of the user's airflow;
- and
- a processor that is electronically coupled to the input to receive the sensor data, the processor being configured to control performance of the measurements and to generate a control signal for the breathing assistance device for a current monitoring time period by:
- generating a respiratory index value that is determined during the current monitoring time period to predict the respiratory failure for the user by:
- performing a Forced Oscillation Technique (FOT) on the user to determine at least one of a reactance, resistance and an impedance of the user's respiratory system;
- and
- generate the respiratory index value based on a relative power spectral density between a current time period and a baseline period for a physiological respiratory signal including at least one of the reactance, resistance and an impedance of the user's respiratory system;
- updating the control signal when the comparison of the respiratory index value to a threshold value indicates that the respiratory failure is detected or is predicted to occur and otherwise maintaining the control signal at a previous setting;
- and
- sending the control signal to the breathing assistance device to adjust the operation of the breathing assistance device during use.
(canceled)
-25. (canceled)
-30. (canceled)
A controller for controlling the operation of a breathing assistance device that provides breathing assistance to a user, wherein the controller comprises:
- an input for receiving sensor data to measure at least one airflow parameter of the user's airflow;
- and
- a processor that is electronically coupled to the input to receive the sensor data, the processor being configured to perform the measurements and to generate a control signal for the breathing assistance device for a current monitoring time period by:
- generating a respiratory index value that is determined during the current monitoring time period to detect a respiratory failure for the user by:
- determining a current weighted respiratory status value based on weighting a reactance and a resistance for the user's respiratory system determined from the measured airflow parameters for the current monitoring time period;
- and
- generating the respiratory index value based on a deviation of the current weighted respiratory status value from a baseline weighted respiratory status value;
- updating the control signal when the comparison of the respiratory index value to a threshold value indicates that the respiratory failure is detected to occur and otherwise maintaining the control signal at a previous setting;
- and
- sending the control signal to the breathing assistance device to adjust the operation of the breathing assistance device during use.
(canceled)
-61. (canceled)
Dependencies are inferred from the claim text.