Rales are believed to be caused by the opening of closed air spaces.

They can sound like salt dropped onto a hot pan or like cellophane being crumpled. Bull World Health Organ. 2021 Feb 1 99(2):164–165. They occur when air is blocked or air flow becomes rough through the large airways. Rales are abnormal lung sounds characterized by discontinuous clicking or rattling sounds. Smoking and epidemics of respiratory infections. Sitas F, Harris-Roxas B, Bradshaw D, Lopez AD. National Heart, Blood, and Lung Institute. Chronic obstructive pulmonary disease: diagnosis and management. Inspiratory crackles-early and late-revisited: identifying COPD by crackle characteristics. Melbye H, Solis JCA, Jacome C, Pasterkamp H. Learn about the different types of normal and abnormal breath sounds that doctors listen for during auscultation. Respiratory sound classification for crackles, wheezes, and rhonchi in the clinical field using deep learning. This is a low-pitched sound that resembles snoring. Sarkar M, Madabhavi I, Niranjan N, Dogra M. crackles or rales were markedly increased toward the dependent lung whereas breath sound amplitude decreased. This is a fine, high-pitched crackling or rattling sound that can occur when you inhale. Wheezes, crackles, and rhonchi: simplifying description of lung sounds increases the agreement on their classification: a study of 12 physicians' classification of lung sounds from video recordings. Autoimmune diseases: Lupus and rheumatoid arthritis can both attack the lungs, causing the progressive scarring of lung tissues.When crackles are heard during auscultation, it can be associated with fluid or secretions in the lungs. Atelectasis: This is a condition that causes alveoli to collapse in certain areas of the lungs. Crackles (Rales) Crackles, also known as rales, are short, explosive, lung sounds that are commonly heard in the small or middle airways of the lungs.

Sarcoidosis: This is a rare condition that causes small patches of granular tissue, called granulomas, to form in the organs of the body, including the lungs.

Idiopathic pulmonary fibrosis (IPF): This is a condition in which lung tissues become thick and stiff for unknown reasons.

Pneumonia: The infection can also cause parenchymal inflammation (sometimes referred to as 'interstitial pneumonia').

Asbestosis: This is a condition that causes scarring of the lungs due to prolonged exposure to asbestos fibers in the air.

Pulmonary edema: This is the swelling of the lungs due to the overload of fluid in tissues (sometimes referred to as 'wet lung').

Interstitial lung disease (ILD): This is an umbrella term used for a large group of diseases that cause scarring (fibrosis) of the lungs.

Rales lung sound