Similar Conditions
There are other disorders that are similar to hepatopulmonary syndrome in individuals with liver disease. One such condition is portopulmonary hypertension, which also affects the pulmonary vasculature. Like hepatopulmonary syndrome, it involves the blood vessels that supply the lungs. However, there is a fundamental difference between the two. While hepatopulmonary syndrome causes vasodilation, which is the widening of these blood vessels, portopulmonary hypertension leads to vasoconstriction, which is the narrowing of these blood vessels.
Diagnosing Hepatopulmonary Syndrome
Identifying Hepatopulmonary Syndrome can be a challenging task for doctors due to its symptoms overlapping with those of liver disease. Dyspnea, or shortness of breath, is a prevalent indication of liver disease, which often leads to a delayed diagnosis of hepatopulmonary syndrome. However, pulmonary function tests can typically detect the signs of the syndrome. It is important to note that these findings may align with the symptoms of normal liver cirrhosis.
Additional tests, such as echocardiograms, can be conducted to determine whether the blood vessels surrounding the lungs are dilated. However, the most effective method for identifying the full extent of hepatopulmonary syndrome’s effects is a macroaggregated albumin lung perfusion scan. This highly efficient scan involves the use of a small number of radioactive particles and a specialized camera to track the movement of these particles throughout the body.