Dry rales

Introduction Dry sputum refers to stenosis or incomplete obstruction of the trachea, bronchi or bronchioles, and turbulence occurs when air is inhaled or exhaled. Its pathological basis is inflammation-induced mucosal congestion and edema, increased secretion, bronchial smooth muscle spasm; intracavitary foreign body, tumor obstruction and enlarged lymphatic or mediastinal compression airway. The dry voice is a breathing add-on that lasts longer and has a higher pitch and a pitch rate of about 300-500 Hz. It lasts for a long time, can be heard when inhaling and exhaling, but it is obvious when exhaling. The intensity and nature of the dry sound are easy to change, the parts are easy to change, and the number can be significantly increased or decreased in an instant.

Cause

Cause:

Often caused by anger and anger, depression, emotional fire, lungs, or liver, heat, lungs, or chronic disease, lung disease, lungs, local dryness, only local lesions such as pneumonia, Tuberculosis or bronchiectasis, etc., both sides of the lungs dry voice, more common in heart failure caused by pulmonary blood stasis and bronchial pneumonia, such as the two lungs full of dry voice, it is more common in acute pulmonary edema or severe bronchial pneumonia. Caused by liver gas and other crimes.

an examination

Related inspection

Chest CT examination of Mycoplasma pneumoniae cold agglutination test

Clinical manifestations:

1, high adjustment, music, long duration, inhalation, exhalation can be heard, but with exhalation is obvious, voice accent, nature, location is variable, the number can be significantly increased or decreased in an instant. The dry sound that occurs in the atmosphere, sometimes can be heard without a stethoscope, which means wheezing.

2, classification

(1) High-pitched dry sound: also known as whistle sound, heightening, pitch frequency >500Hz, short "Zhi-Zhi" sound or music, sound quality rises when forced exhalation, occurs in smaller bronchi or thin Bronchial, also known as wheezing.

(2) Low-key dry voice: also known as rhythm (rhonchus rale), down, gene frequency <200Hz, snoring or snoring, mostly in the trachea or main bronchus.

3. Distribution parts

Bilateral diffuse dry snoring, found in bronchial asthma, chronic bronchial asthma and cardiogenic asthma, local dry sputum, found in endobronchial tuberculosis, tumor, caused by local bronchial stenosis.

Differential diagnosis

The dry voice should be distinguished from the wet voice:

Wet voice: The sound produced by the rupture of a bubble through the secretions in the respiratory tract during inhalation. Auscultation features inhalation, exhalation can be heard, continue and short-lived, more obvious when inhaling or inhaling. The part is relatively constant, the nature is not easy to change, and the medium and small blisters can exist at the same time, and can be alleviated or disappeared after coughing.

Characteristics of dry voice hearing: The nature of the part is easy to adapt, the duration is long and the pitch is high, and it has the nature of music, and it is obvious when exhaling.

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