Abdominal mobile turbidity percussion, mainly to clarify the presence or absence of abdominal fluid. Standing on the right side of the patient during the examination, the patient needs to take the supine position, with both lower limbs flexed, in the navel as the starting point to the left side of the percussion, and gradually percussion to the relative turbidity, let the patient to take the right side of the lying position, if the percussion again found the drum, basically considered to be a positive mobility turbid tone. You can also continue to percussion in the right lateral position, until the right side of the relative turbidity boundary becomes turbid, ask the patient to take the left side of the lying position, if the position of the percussion at this time into the drum sound, it is even more indicative of mobile turbidity positive. In view of the positive results on both sides of the percussion, it is basically considered that the mobile turbidities are positive.