abdominal ballottement

ab·dom·i·nal bal·lotte·ment

palpation of the abdomen to detect excessive amounts of fluid (ascites) by causing organs to bob up and down in the fluid milieu.
References in periodicals archive ?
A technique called "abdominal ballottement" can be used where the abdomen is compressed and, if there is free fluid in the abdomen, the organs swing through the abdomen and can be felt by a hand placed on the opposite side of the abdomen.