Normal breathing sound (alveoli) sounds louder and longer during inspiration than on expiration, and there is no space between the inspiratory sound and the exhalation sound. The intensity of breath sounds is related to the total volume of air at the mouth and the air flow at the stethoscope ( regional airflow). In the past, it was thought that breathing sounds came from the alveoli, so it was called alveolar sound ( vesicular sounds). Breathing sounds are produced by the propagation of air turbulence in the large, filtered airways through the normal lungs to the chest wall. Breathing sounds are produced by the airways rather than the alveoli. Normal breathing sounds Normal breathing sounds are heard with a stethoscope in most parts of the chest. If it interrupts (interrupted): called crackles (Koala doesn’t know how to translate).If this sound is continuous (continuous): called wheezes (translated into Vietnamese as stork).Added (adventitious) sounds (rough translation: Sub-tones): are audible sounds that are not breathing sounds, divided into 2 types:.Breath sounds(Translation: Breathing sound).The English symptom book authors describe the sounds heard on lung examination using the following terms: Terminology currently used in English symptom books Previous views that the upper sounds (rales) originate from fluid in the airways were disproved. , allowing pressure upstream and downstream to equalise). Today, it is generally agreed that crackles are small explosions that occur when the closed airways open suddenly, balancing the upstream and downstream pressures (miniature exploations which occur when previously closed airways open suddenly). The term “rales” was used until 1974 when it was proposed to be abolished and replaced by the term “inspiratory crackles” because the term “rales” has an inaccurate and misleading basis. The reason why English books don’t use the term “rales” If the timbre is low then they are called sonorous rales (don’t know what the Vietnamese book I translate is!).If they have a high timbre, they are called ram music (musical rales, but Vietnamese medical books often call it rattle).They have the same value as medium-grain moist rancid.ĭry Ran (explosive crackles) are caused by movement of thick secretions or vibrations of swollen and inflamed membranes. They sound like hairs between your fingers. Moist fine, crackling or subcrepitant rales is thought to originate from fluid in the alveoli.They sound like clicks or small bubbles and are present in bronchitis, pneumothorax, pulmonary infarction, pulmonary cavernous, and tuberculosis. Moist medium or crepitant rales occurs due to relatively liquid movement in the bronchi and bronchioles.moist coarse rales, or rhonchi or gurgling rales common in people who are dying or are too weak to expel phlegm from the airways.Iran moisture are further divided into the following categories:
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