The examination of mobile turbid tones during physical examination is a test to determine the presence of peritoneal fluid in patients. If the patient has fluid in the peritoneal cavity and it reaches a certain amount, the possibility of the patient having fluid in the peritoneal cavity can be determined by the mobile turbid sound examination. At this time, the patient should be advised to further investigate the ultrasound of the abdominal cavity, that is, abdominal ultrasound, to see if the patient has a peritoneal fluid. If necessary, a right lower abdominal puncture can be done to see if fluid can be extracted and to understand the nature of the fluid. If the patient is judged to have peritoneal fluid, it is important to further investigate the cause of the peritoneal fluid and to see if the patient has signs of peritoneal irritation. If the patient has signs of peritoneal irritation that have spread to the mural peritoneum, the patient appears to have a platysmal abdomen. In this case, the patient is considered to have a perforated gastrointestinal tract or a bile leak due to liver rupture or trauma, which may cause chemical peritonitis. In such cases, a diagnostic puncture of the right lower abdomen is usually required. If noncoagulated blood is obtained, the patient is considered to have a ruptured spleen, liver, mesenteric vessels, etc., and requires an emergency caesarean section. If the patient has a simple peritoneal fluid collection with high volume, peritoneal puncture and drainage can be actively considered, and routine and biochemical tests of ascites can be done.