Sputum trait

Normal human sputum is foamy or mucous. In the case of respiratory disease, the sputum may be mucoid, serous, purulent, mucopurulent or bloody and other traits, which is helpful for clinical diagnosis.

Basic Information

Specialist classification: Respiratory examination classification: sputum examination

Applicable gender: whether men and women apply fasting: fasting

Tips: If necessary, add carbolic acid to the specimen bottle. Normal value

Slightly sticky.

Clinical significance

1, mucinability

The early stage of bronchitis, bronchial asthma, and lobar pneumonia.

2, serous (foaming)

1 pink foam-like pulmonary edema, pulmonary congestion.

2 white foam-like bronchial asthma, chronic bronchitis.

3, purulent

Bronchiectasis, lung abscess, lung gangrene, tuberculosis cavity, bronchopleural fistula, tuberculosis complicated by infection.

4, bloody

Tuberculosis, paragonimiasis, bronchitis, bronchiectasis, pneumonia, lung abscess, lung tumor, lung trauma, rheumatic heart disease, mitral stenosis with pulmonary congestion, pulmonary edema, pulmonary hypertension, pulmonary infarction, pulmonary hemorrhage type Leptospira Disease, lobar pneumonia, epidemic hemorrhagic fever complicated by pulmonary edema, leukemia, acute respiratory distress syndrome.

5, layering

The upper layer of the sputum is mucus, the middle layer is a slurry, and the lower layer is a pus. It is more common in bronchiectasis, lung abscess, lung gangrene, and tuberculosis.

6, milky white paste

May be Candida albicans infection.


1. When the sputum is checked, it is very important for the patient to take a qualified sputum specimen. That is, first sip a few times with water, and then cough up the sputum deep in the trachea. Generally, it is advisable to use the first to second mouths after deep cough in the morning.

2. If you take the sputum specimen within 24 hours, avoid mixing saliva, nasopharyngeal secretions, food, mouthwash and so on. If necessary, add carbolic acid to the specimen bottle for preservation.

Inspection process

Immediately after the collection of the sputum specimen, the test is carried out to test the homology test.

Not suitable for the crowd

Inappropriate people: Generally there are no people who are not suitable.

Adverse reactions and risks

No adverse reactions.