Methods for detection of respiratory effort and sleep apnea monitoring devices
First Claim
1. A sleep apnea monitoring device comprising:
- a housing shaped to fit the contours of a patient'"'"'s face;
one or more photosensors positioned on a nasal area of the patient and coupled to the housing, the one or more photosensors configured to generate output signals related to peripheral photoplethysmography data of the patient;
one or more air-flow sensors positioned near or inside one or more nostrils of the patient and coupled to the housing, the one or more air-flow sensors configured to generate output signals conveying airflow information related to an airflow of the patient;
a memory disposed in the housing and configured to store physiological information related to the peripheral photoplethysmography data and store the airflow information; and
one or more processors disposed in the housing and configured to;
receive, from the one or more photosensors, the peripheral photoplethysmography data;
receive, from the one or more air-flow sensors, the airflow information;
identify an apneic event based on the airflow information being indicative of an absence of airflow;
obtain, via filtering of the peripheral photoplethysmography data, a DC component of the peripheral photoplethysmography data;
determine, based on the peripheral photoplethysmography data, a change in vascular tone from a time prior to the apneic event to a time during the apneic event;
determine whether the DC component indicates respiratory effort from the patient; and
responsive to the DC component indicating no respiratory effort from the patient, determine a diagnosis of the apneic event based on an adjusted component, the adjusted component being based on the DC component and the change in vascular tone.
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0 Petitions
Accused Products
Abstract
A sleep apnea diagnostic system includes a housing that is configured to be attached to near the nose of a patient'"'"'s face to sense physiological information of a patient. The housing includes sensors to sense the physiological information. The physiological information may be, for example, air flow through the nose or the mouth or both. The physiological information further may be, for example, blood volume. The sleep apnea diagnostic system includes at least one processor in the housing or external to the housing or both to analyze the physiological information to determine whether the patient has experienced irregular or abnormal respiratory activity and to detect respiratory effort. The analysis may be real time or delayed.
34 Citations
18 Claims
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1. A sleep apnea monitoring device comprising:
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a housing shaped to fit the contours of a patient'"'"'s face; one or more photosensors positioned on a nasal area of the patient and coupled to the housing, the one or more photosensors configured to generate output signals related to peripheral photoplethysmography data of the patient; one or more air-flow sensors positioned near or inside one or more nostrils of the patient and coupled to the housing, the one or more air-flow sensors configured to generate output signals conveying airflow information related to an airflow of the patient; a memory disposed in the housing and configured to store physiological information related to the peripheral photoplethysmography data and store the airflow information; and one or more processors disposed in the housing and configured to; receive, from the one or more photosensors, the peripheral photoplethysmography data; receive, from the one or more air-flow sensors, the airflow information; identify an apneic event based on the airflow information being indicative of an absence of airflow; obtain, via filtering of the peripheral photoplethysmography data, a DC component of the peripheral photoplethysmography data; determine, based on the peripheral photoplethysmography data, a change in vascular tone from a time prior to the apneic event to a time during the apneic event; determine whether the DC component indicates respiratory effort from the patient; and responsive to the DC component indicating no respiratory effort from the patient, determine a diagnosis of the apneic event based on an adjusted component, the adjusted component being based on the DC component and the change in vascular tone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for generating apneic event diagnosis based on specifically-positioned sensors, the method comprising:
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affixing a housing on an individual'"'"'s skin; receiving, with one or more processors, from one or more first sensors, output signals related to peripheral photoplethysmography data of the individual, the one or more first sensors being positioned on a nasal area of the individual and coupled to the housing; receiving, with the one or more processors, from one or more second sensors, output signals conveying airflow information related to an airflow of the individual, the one or more second sensors being positioned near or inside one or more nostrils of the individual and coupled to the housing; identifying, with the one or more processors, an apneic event based on the airflow information being indicative of an absence of airflow; obtaining, via filtering of the peripheral photoplethysmography data, a DC component of the peripheral photoplethysmography data; determining, with the one or more processors, based on the peripheral photoplethysmography data, a change in vascular tone from a time prior to the apneic event to a time during the apneic event; determining, with the one or more processors, whether the DC component indicates respiratory effort from the patient; and responsive to the DC component indicating no respiratory effort from the patient, determining, with the one or more processors, a diagnosis of the apneic event based on an adjusted component, the adjusted component being based on the DC component and the change in vascular tone. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A system for generating apneic event diagnosis based on specifically-positioned sensors, the system comprising:
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one or more first sensors positioned on a nasal area of an individual, the one or more first sensors configured to generate output signals related to peripheral photoplethysmography data of the individual; one or more second sensors positioned near or inside one or more nostrils of the individual, the one or more second sensors configured to generate output signals conveying airflow information related to an airflow of the individual; and one or more processors configured by machine-readable instructions to; receive, from the one or more first sensors, the peripheral photoplethysmography data; receive, from the one or more second sensors, the airflow information; identify an apneic event based on the airflow information being indicative of an absence of airflow; obtain a DC component of the peripheral photoplethysmography data; determine, based on the peripheral photoplethysmography data, a change in vascular tone from a time prior to the apneic event to a time during the apneic event; determine whether the DC component indicates respiratory effort from the patient; and responsive to the DC component indicating no respiratory effort from the patient, determine a diagnosis of the apneic event based on an adjusted component, the adjusted component being the DC component and the change in vascular tone. - View Dependent Claims (18)
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Specification