Apparatus and method for detecting lung sounds using an implanted device
First Claim
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1. A system, comprising:
- an implantable housing;
a sensor adapted for ambulatory operation in a patient and adapted to be positioned adjacent to a pulmonary system of the patient, the sensor adapted to output signals indicative of lung sounds;
filtering circuitry provided at the housing and adapted to filter the sensor output signals by removing signal content unrelated to adventitious lung sounds;
detection circuitry provided at the housing and adapted to receive filtered sensor output signals from the filtering circuitry, the detection circuitry further adapted to detect presence of adventitious lung sounds based on a comparison between the filtered sensor output signals and criteria indicative of adventitious lung sounds;
a memory provided at the housing and configured to store at least data indicative of adventitious lung sounds detected by the detection circuitry; and
a processor provided at the housing and coupled to the detection circuitry and the memory, the processor configured to organize the adventitious lung sounds data as log entries in the memory.
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Abstract
Adventitious lung sounds indicative of lung congestion are detected using an implantable sensor. The sensor is adapted to be positioned adjacent to a pulmonary system and to output signals indicative of lung sounds in response to pulmonary system activity. A controller receives the signals and processes the signals to detect the presence of adventitious lung sounds. A respiratory cycle sensor operating in conjunction with the lung-sound sensor enables classification of an adventitious lung sound according to its time occurrence within the respiratory cycle. Posture sensing in conjunction with lung-sound sensing provides valuable additional information as to the severity of the lung congestion.
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Citations
20 Claims
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1. A system, comprising:
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an implantable housing; a sensor adapted for ambulatory operation in a patient and adapted to be positioned adjacent to a pulmonary system of the patient, the sensor adapted to output signals indicative of lung sounds; filtering circuitry provided at the housing and adapted to filter the sensor output signals by removing signal content unrelated to adventitious lung sounds; detection circuitry provided at the housing and adapted to receive filtered sensor output signals from the filtering circuitry, the detection circuitry further adapted to detect presence of adventitious lung sounds based on a comparison between the filtered sensor output signals and criteria indicative of adventitious lung sounds; a memory provided at the housing and configured to store at least data indicative of adventitious lung sounds detected by the detection circuitry; and a processor provided at the housing and coupled to the detection circuitry and the memory, the processor configured to organize the adventitious lung sounds data as log entries in the memory. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system, comprising:
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an implantable housing; a sensor adapted for ambulatory operation in a patient and adapted to be positioned adjacent to a pulmonary system of the patient, the sensor adapted to output signals indicative of lung sounds; detection circuitry provided at the housing and adapted to detect presence of adventitious lung sounds; a memory provided at the housing and configured to store at least data indicative of adventitious lung sounds detected by the detection circuitry; and a processor provided at the housing and coupled to the detection circuitry and the memory, the processor configured to organize the adventitious lung sounds data as log entries in the memory. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A method, comprising:
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implantably sensing lung sounds for an ambulatory patient and producing output signals indicative of sensed lung sounds; implantably detecting adventitious lung sounds using the output signals; storing at least data indicative of detected adventitious lung sounds in an implantable memory; and implantably organizing the adventitious lung sounds data as log entries in the memory. - View Dependent Claims (20)
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Specification