This is a high-pitched sound, almost like a long squeak, that can occur as you inhale or exhale. This is a low-pitched sound that resembles snoring. Some doctors also use other listening tools, such as computerized lung sound analysis. This is a fine, high-pitched crackling or rattling sound that can occur when you inhale. In this article, learn about abnormal breath sounds, including wheezing, crackling, rhonchi, and stridor. ![]() It may be heard in asthma, emphysema and chronic bronchitis. It is commonly heard in the lungs during expiration. Newer techniques include phonopulmonographic electronic sound recordings, acoustic scanning spectrometers, radioactive isotope ventilation scanners, and psychometric acoustic analyses. Types of abnormal breath sounds include: Rales. Alternately, what we often refer to as rhonchi is the sonorous wheeze, which refers to a deep, low-pitched rumbling or coarse sound, as air moves through tracheal/bronchial passages in the presence of mucus or respiratory secretions. ![]() Modern scientific inquiry is starting to clarify causes of the lung sounds heard by physicians for centuries. Irregular breath sounds are usually indicators of health issues in the lungs or airways. The expiratory wheezes of asthma, the bibasilar rĂ¢les of early atelectasis, congestive heart failure, interstitial lung disease, the stridor of upper airway obstruction, or the absent breath sounds below a displaced endotracheal tube usually do not show in a roentgenogram or a blood test but are best diagnosed and followed up sequentially by careful physical examinations, including auscultation via the stethoscope. AUSCULTATION and percussion of the chest are still extremely valuable diagnostic tools in the hands of the skilled clinician, despite widespread reliance on chest roentgenograms and blood tests and the resulting atrophy of basic physical diagnosis techniques.
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