cough
The early cough of pneumoconiosis patients is not obvious, but with the development of the disease course, patients are often complicated with chronic bronchitis, and late patients are often complicated with lung infection, which can obviously aggravate cough. Cough is related to season, climate, etc.
spit
Expectoration is mainly caused by the continuous removal of dust by the respiratory system. Generally, the amount of expectoration is not much, mostly gray and thin sputum. If complicated with pulmonary infection and chronic bronchitis, the amount of sputum is obviously increased, and the sputum is yellow, sticky or massive. It's usually hard to cough up.
chest pain
Pneumoconiosis patients often feel chest pain, and chest pain has no correlation or parallel relationship with the clinical manifestations of pneumoconiosis. Different parts, and often change, are mostly limited. Generally, it is dull pain, but also swelling pain, needle prick pain and so on.
Dyspnea; Respiratory distress; dyspnea; respiratory distress; breathing difficulties
With the aggravation of pulmonary fibrosis, the effective breathing area decreases, the ventilation/blood flow ratio is unbalanced, and the dyspnea becomes more and more serious. Pneumoconiosis with Complications of the Lung
Occurrence can obviously aggravate the degree and development speed of dyspnea.
haemoptysis
Rare, but long-term chronic inflammation of respiratory tract can cause mucosal vascular injury, with a small amount of bloodshot sputum; It may also increase blood volume due to the dissolution and rupture of large fibrotic lesions and the damage to blood vessels.
Prevention and control
1. Process reform and production equipment innovation are the main ways to eliminate dust hazards.
2. Wet operation: timely wet grinding of refractories, wet drilling in mines, underground transportation and water spraying.
3. Sealed ventilation and dust removal: For places where wet operation cannot be carried out, sealed ventilation and dust removal should be adopted to prevent dust from flying.
4. Health examination of workers exposed to dust: including pre-job and regular health examination, and dust removal inspection should also be done when leaving dust. 5. Personal protection: Wear dust-proof protective gear, such as dust-proof helmet, air supply helmet and air supply mask.