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Physiologic recorders designed to store information of the breathing sounds produced during respiration, including lung (e.g., bronchi) sounds, cough, and wheezing in ambulatory patients and/or during sleep. These recorders typically consist of dedicated sound sensors, a processing unit, and an electronic digital recorder that can store the data for at least 24 hours. The data can be retrieved and assessed both in numerical and graphic format using computer algorithm software. This is dedicated software that is supplied with the recorder or available from the manufacturer. Breathing sounds physiologic recorders are intended for continuous assessment of patients suffering from wheezing, cough, shortness of breath, or nocturnal asthma; they may be used for continuous acoustic measurements of respiratory function for any other reason.
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