Control of neonatal oxygen supply with artifact detection
First Claim
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1. A system for controlling oxygen supply for a subject having an airway, the system comprising:
- a pressure generator configured to generate a pressurized flow of breathable gas for delivery to the airway of the subject, wherein the pressurized flow of breathable gas is delivered through a subject interface appliance;
a plurality of physiological sensors configured to generate output signals conveying physiological information related to one or more physiological parameters of the subject;
one or more position sensors configured to generate output signals conveying position information related to one or more of the physiological sensors with respect to the subject, the subject interface appliance, and/or to other ones of the physiological sensors, wherein the one or more position sensors are not coupled to the subject and output video data;
one or more processors configured to execute computer program modules, the computer program modules comprising;
a parameter determination module configured to determine a level of arterial oxygen saturation of the subject based on the output signals generated by the physiological sensors;
an artifact module configured to detect displacement of the physiological sensors that could result in artifacts in determinations of the level of arterial oxygen saturation by the parameter determination module, wherein the artifact module is configured to detect such displacement based on the output signals generated by the one or more position sensors, wherein detecting displacement comprises detecting individual sensors of the plurality of physiological sensors in the video data, determining distances between the plurality of physiological sensors, and comparing those determinations with historical averages for the distances between the plurality of physiological sensors; and
an oxygen control module configured to adjust one or more of the pressurized flow of breathable gas and/or a fraction of oxygen in the pressurized flow of breathable gas based on the determined level of arterial oxygen saturation and detections of displacement by the artifact module.
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Abstract
A system and method to control oxygen supply uses determinations whether physiological sensors and/or a subject interface appliance have been displaced in relation to a subject and/or there has been movement of the subject itself. Artifacts that may reduce the accuracy of measurements of physiological parameters, in particular related to a level of arterial oxygen saturation, may be detected through determinations pertaining to sensor displacement, displacement of the subject interface appliance and/or movement of the subject.
17 Citations
24 Claims
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1. A system for controlling oxygen supply for a subject having an airway, the system comprising:
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a pressure generator configured to generate a pressurized flow of breathable gas for delivery to the airway of the subject, wherein the pressurized flow of breathable gas is delivered through a subject interface appliance; a plurality of physiological sensors configured to generate output signals conveying physiological information related to one or more physiological parameters of the subject; one or more position sensors configured to generate output signals conveying position information related to one or more of the physiological sensors with respect to the subject, the subject interface appliance, and/or to other ones of the physiological sensors, wherein the one or more position sensors are not coupled to the subject and output video data; one or more processors configured to execute computer program modules, the computer program modules comprising; a parameter determination module configured to determine a level of arterial oxygen saturation of the subject based on the output signals generated by the physiological sensors; an artifact module configured to detect displacement of the physiological sensors that could result in artifacts in determinations of the level of arterial oxygen saturation by the parameter determination module, wherein the artifact module is configured to detect such displacement based on the output signals generated by the one or more position sensors, wherein detecting displacement comprises detecting individual sensors of the plurality of physiological sensors in the video data, determining distances between the plurality of physiological sensors, and comparing those determinations with historical averages for the distances between the plurality of physiological sensors; and an oxygen control module configured to adjust one or more of the pressurized flow of breathable gas and/or a fraction of oxygen in the pressurized flow of breathable gas based on the determined level of arterial oxygen saturation and detections of displacement by the artifact module. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of controlling oxygen supply for a subject, the subject having an airway, the method using a system that includes a pressure generator, a plurality of physiological sensors, and one or more position sensors, the method comprising:
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generating, by the pressure generator, a pressurized flow of breathable gas for delivery to the airway of the subject through a subject interface appliance; generating, by the plurality of physiological sensors, output signals conveying physiological information related to one or more physiological parameters of the subject; generating, by the one or more position sensors, output signals conveying position information related to one or more of the physiological sensors with respect to the subject, the subject interface appliance, and/or to other ones of the physiological sensors, wherein the one or more position sensors are not coupled to the subject and output video data; determining a level of arterial oxygen saturation of the subject based on the output signals generated by the physiological sensors; detecting displacement of the physiological sensors, subject interface appliance, and/or detect movement of the subject that could result in artifacts in determinations of the level of arterial oxygen supply, wherein the detections are based on the output signals generated by the one or more position sensors, wherein detecting displacement comprises detecting individual sensors of the plurality of physiological sensors in the video data, determining distances between the plurality of physiological sensors, and comparing those determinations with historical averages for distances between the plurality of physiological sensors; and adjusting one or more of the pressurized flow of breathable gas and/or a fraction of oxygen in the pressurized flow of breathable gas based on the determined level of arterial oxygen saturation and the detections of displacement. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A system configured to control oxygen supply for a subject having an airway, the system comprising:
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means for generating a pressurized flow of breathable gas for delivery to the airway of the subject through a subject interface appliance; first means for generating output signals conveying physiological information related to one or more physiological parameters of the subject; second means for generating output signals conveying position information related to one or more of the first means with respect to the subject, the subject interface appliance, and/or the first means, wherein the second means for generating output signals conveying position information are not coupled to the subject and output video data; first means for determining a level of arterial oxygen saturation of the subject based on the output signals generated by the first means for generating; second means for detecting whether the first means for generating has been displaced in a way that could result in artifacts in determinations by the first means, wherein operation of the second means for detecting is based on the output signals generated by the second means for generating, wherein detecting displacement comprises detecting individual means of the first means for generating output signals conveying physiological information in individual frames of video data obtained from the second means for generating output signals conveying position information, determining the distances between the first means for generating output signals conveying physiological information, and comparing those determinations with historical averages for the distances between the first means for generating output signals conveying physiological information; and means for adjusting one or more of the pressurized flow of breathable gas and/or a fraction of oxygen in the pressurized flow of breathable gas based on determinations by the first means for determining and detections by the second means for detecting. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification