Cough with blood is mostly caused by respiratory diseases, such as bronchodilatation, pneumonia, and lung tumors. Tests that need to be done include laboratory tests such as routine blood tests and imaging tests such as X-ray chest radiographs.
1. Laboratory examination
(1) Blood routine: to determine whether there is infection.
(2) Biochemical examination: to know the electrolytes in the patient’s body and the function of liver and kidney, which can check the electrolytes, liver function, kidney function and so on.
(3) Blood gas analysis: It can detect the oxygen and carbon dioxide content in the patient’s blood, which helps to clarify the cause of coughing with blood.
(4) Sputum smear test: it can initially determine the presence of tuberculosis or other diseases.
(5) Plasma D-dimer: helps to determine whether there is pulmonary embolism.
(6) Urine routine: can help to determine whether there is nephritis syndrome and other diseases.
2. Other examinations
(1) X-ray chest radiograph: helps to determine whether there is any abnormality in the lungs initially.
(2) Chest CT: It can show the fine structure of the chest and lungs.
(3) Bronchoscopy: Helps to clarify the diagnosis or stop bleeding treatment.
(4) Echocardiography: helps to detect the structure and function of the heart and clarify the cause of the disease.
Depending on the cause of coughing up blood, other tests may be needed, so you should go to the hospital in time when you have symptoms and choose the appropriate tests under the guidance of your doctor.