Scratch test

The scratch test is an auxiliary test method used to check whether the abdominal liver is normal. This test is mainly used to assist in demarcation when palpation of the lower hepatic margin is unclear. The patient took a supine position. The doctor held a stethoscope membrane-shaped body on the left side of the midline of the right clavicle. The right finger was in a zigzag shape from the bottom to the right midclavicular line. Gently scrape the right upper abdominal wall, or on the upper abdomen. Gently scrape the abdominal wall from a distance to the membrane body within a semi-circular equidistance range. When it does not reach the margin of the liver, only a distant and slight sound is heard. When scraped to the surface of the liver, the sound is significantly enhanced. And near ear. This is because the transmission of sound by substantial organs is better than that of cavity organs. This method is often used in patients with thick abdominal walls or unsatisfactory cooperation with palpation. Sometimes it is also used to identify whether the right upper abdominal mass is an enlarged liver. Once the lower margin of the liver is identified, it can be verified with palpation. This method can also be used to determine the gastric boundary.