A pericardial effusion less than 2mm thick is normal. However, if the pericardial effusion in the fetus is 2mm or denser, it may be related to structural heart abnormalities or congenital diseases.

Normally, the pleural cavity always contains about 20 ml of clear or pale yellow physiological fluid. When there is an excessive amount of fluid, it is called a pleural effusion. Of the causes of this condition, red or bloody pleural fluid is often associated with trauma. Less common causes of red pleural effusion are tuberculosis, aortic dissection, ruptured aortic aneurysm, and malignancy.

Pulmonary edema, also known as lung congestion, is a condition where the lungs are filled with fluid, leading to pleural effusion and lung obstruction. When suffering from pulmonary edema, the body lacks oxygen, and you begin to experience difficulty breathing. The following article will clarify the causes of pulmonary edema and effective intervention solutions.