симптом Щёткина-Блюмберга(Blumberg's sign, also referred to as rebound tenderness, is a clinical sign that is elicited during physical examination of a patient's abdomen by a doctor or other health care provider. It is indicative of peritonitis. It refers to pain upon removal of pressure rather than application of pressure to the abdomen. wikipedia.org)
симптом Щёткина-Блюмберга(An indication of peritonitis in which pain is felt upon sudden release of steadily applied pressure on a suspected area of the abdomen.)