Bronchoalveolar sounds

Introduction Bronchoalveolar breath sounds are mixed breath sounds that combine the characteristics of bronchial breath sounds and alveolar breath sounds. The nature of its breath sounds is similar to normal alveolar breath sounds, but the pitch is higher and louder. The nature of the breath sound is similar to that of the bronchial breath sound, but the intensity is slightly weaker, the tone is slightly lower, the tube-like nature is less and the expiratory phase is shorter, and there is a very short gap between inhalation and exhalation. The inspiratory phase of bronchoalveolar breath sounds is approximately the same as the expiratory phase. Normal people in the first to second intercostal space on both sides of the sternum, the third to fourth thoracic level in the interscapular region and the anterior and posterior apical audible and bronchoalveolar breath sounds.

Cause

Mechanism: The atmospheric tube is close to the part of the body surface covered by the lung tissue, and different proportions of alveolar breath sounds are combined with tubular breath sounds.

Bronchoalveolar breath sounds are mixed breath sounds that combine the characteristics of bronchial breath sounds and alveolar breath sounds. The nature of the inspiratory sound is similar to normal alveolar breath sounds, but the pitch is higher and louder. The nature of the breath sound is similar to that of the bronchial breath sound, but the intensity is slightly weaker, the tone is slightly lower, the tube-like nature is less and the expiratory phase is shorter, and there is a very short gap between inhalation and exhalation. The inspiratory phase of bronchoalveolar breath sounds is approximately the same as the expiratory phase. Normal people in the first to second intercostal space on both sides of the sternum, the third to fourth thoracic level in the interscapular region and the anterior and posterior apical audible and bronchoalveolar breath sounds. When other parts can hear the bronchoalveolar breath sounds, it is an abnormal situation, suggesting that there is a lesion.

an examination

Related inspection

Lung and pleural percussion test

an examination:

Normal people in the first to second intercostal space on both sides of the sternum, the third to fourth thoracic level in the interscapular region and the anterior and posterior apical audible and bronchoalveolar breath sounds. The nature of its breath sounds is similar to normal alveolar breath sounds, but the pitch is higher and louder. The nature of the breath sound is similar to that of the bronchial breath sound, but the intensity is slightly weaker, the tone is slightly lower, the tube-like nature is less and the expiratory phase is shorter, and there is a very short gap between inhalation and exhalation.

Differential diagnosis

Abnormal bronchoalveolar sounds often suggest the following diseases:

1, lung tissue consolidation, such as the consolidation of large leaf pneumonia, tuberculous caseous pneumonia, pulmonary infarction, lung cancer and so on.

2. The lung tissue is under pressure, such as pleural effusion or tumor.

3. There is a large cavity in the lung that resonates with the bronchus.

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