Tubular breath sounds

Introduction Tube-like breath sounds, also known as abnormal bronchial breath sounds, refer to bronchial breath sounds heard in the normal alveolar breath sound distribution area.

Cause

There are many diseases that cause tubular breath sounds: 1. lung tissue consolidation, seen in the pneumonia consolidation phase; 2. large cavity in the lung, found in lung abscess or hollow tuberculosis; 3. compacted atelectasis, moderate When the pleural effusion is above, a weak and distant bronchial breath sound can be heard above the effusion zone.

an examination

Related inspection

Pulmonary function test lung biopsy lung imaging

When the normal breath sounds are not heard in the normal alveolar breath sounds and the bronchial breath sounds are heard, it can be judged that the patient has a tubeatic breath sound.

Differential diagnosis

Tube breath sounds may have different timbres due to different causes, locations, and lesions.

(1) consolidation of lung tissue: the solid lung tissue is well-transmitted, and the bronchial breath sound can be easily heard through the solid lungs to the body surface. The larger the range of consolidation, the closer it is to the body surface, the stronger its sound; the opposite is weaker. Common in the consolidation of large leaf pneumonia, pulmonary infarction, severe tuberculosis infiltration or caseous pneumonia.

(2) Large cavity in the lung: When the lung has a large cavity and communicates with the bronchus, and the surrounding lung tissue is dense, the bronchial breath sound can resonate in the cavity and pass through the dense lung tissue to the chest wall, which can be heard clearly. Tube breathing sound. Common in lung abscess, hollow tuberculosis. If the diameter of the cavity is not less than 5cm, and the inner wall is smooth and communicates with the larger bronchus, the air can vibrate and oscillate in the cavity, and the auscultation sounds like a small bottle-like low-pitched voice called a cavity bronchus. Breathing sound. When the inner wall is smooth and the shallow cavity is filled with gas. When the lung tissue around the cavity is dense, the tube produces a high-pitched breath sound with a loud metallic tone called metallic bronchial breath sound. Tube breath sounds are also seen in pneumothorax with pleural rupture and the pressure in the pleural cavity is quite high.

(3) Compressive atelectasis: the lungs are compressed during pleural effusion, due to local lung insufficiency, the formation of oppressive atelectasis, the compressed lungs contain less gas, the lung tissue is denser, which is conducive to the transmission of bronchial breath sounds Therefore, the tube breath sound is heard at the edge of the lung where the lung is pressed above the effusion zone, but the sound is weak and appears distant. Pulmonary effusion, a large amount of pericardial effusion will also hear tube breathing sounds in the lungs.

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