Ascitic fluid examination might reveal infection symptoms and the underlying etiology of a condition. The buildup of ascitic fluid in the peritoneal cavity is known as ascites. Ascites can be brought on by a variety of illnesses, but the most frequent one is portal hypertension, which is typically brought on by liver cirrhosis. The abdomen may become highly swollen and rigid from excessive fluid buildup, making the patient feel out of breath (due to diaphragmatic splinting). A needle and syringe are often used to collect a fluid sample.