Detection of chronic obstructive pulmonary disease exacerbations from breathing patterns
First Claim
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1. A system comprising:
- a first implantable medical device including;
a sensing circuit configured to generate a sensed physiological signal representative of respiration of a subject when operatively coupled to electrodes configured to contact the subject;
a communication circuit configured to communicate information with a separate device; and
a first processor including an end expiratory volume (EEV) module configured to determine a measure representative of EEV of the subject using the sensed physiological signal; and
a second medical device including;
a communication circuit configured to communicate information with the first medical device; and
a second processor including a lung hyperinflation detection module configured to generate an indication of lung hyperinflation of the subject according to the measure of EEV and provide the indication to a user.
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Abstract
An apparatus may include a sensing circuit and a processor. The sensing circuit is configured to generate a sensed physiological signal, wherein the physiological signal includes respiration information of a subject. The processor includes an end expiratory volume (EEV) module configured to determine a value of EEV of the subject using the sensed physiological signal, and a lung hyperinflation detection module configured to generate an indication of lung hyperinflation of the subject according to the value of EEV and provide the indication to at least one of a user or process.
27 Citations
16 Claims
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1. A system comprising:
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a first implantable medical device including; a sensing circuit configured to generate a sensed physiological signal representative of respiration of a subject when operatively coupled to electrodes configured to contact the subject; a communication circuit configured to communicate information with a separate device; and a first processor including an end expiratory volume (EEV) module configured to determine a measure representative of EEV of the subject using the sensed physiological signal; and a second medical device including; a communication circuit configured to communicate information with the first medical device; and a second processor including a lung hyperinflation detection module configured to generate an indication of lung hyperinflation of the subject according to the measure of EEV and provide the indication to a user. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of operating an implantable medical device, the method comprising:
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sensing a physiological signal that includes respiration information of a subject using a sensing circuit of the implantable medical device, wherein the sensing circuit produces the physiological signal when operatively coupled to electrodes configured to contact the subject; determining a value of end expiratory volume (EEV) of the subject using the sensed physiological signal; and generating, with the implantable medical device, an indication of lung hyperinflation of the subject according to the value of EEV and providing the indication to a user. - View Dependent Claims (9)
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10. An apparatus comprising:
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a first physiological sensing circuit configured to generate a first sensed physiological signal, wherein the first sensed physiological signal includes respiration information of a subject; a processor including; an end expiratory volume (EEV) module configured to determine a value of EEV of the subject using the first sensed physiological signal; and a lung hyperinflation detection module configured to generate an indication of lung hyperinflation of the subject according to the value of EEV and provide the indication to a user; and a second physiological sensing circuit configured to generate a second sensed physiological signal representative of respiration that is separate from the first sensed physiological signal and a physical activity sensing circuit wherein the EEV module is configured to change from determining EEV using the first sensed physiological signal to determining EEV using the second sensed physiological signal when sensed physical activity of the subject exceeds a specified physical activity threshold. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification