Đau dội (Rebound tenderness)

Mô tả: The clinician presses down deep on the abdomen and then quickly removes the hand (i.e. the pressure). The patient feels sudden pain on the release of pressure rather than the preceding palpation.

Nguyên nhân: • Any cause of peritonitis

Cơ chế: When the abdomen is pushed down and then quickly released, the peritoneum rebounds back and, if inflamed, the rebound movement will activate pain sensory fibres.

Ý nghĩa lâm sàng: Originally said to be one of the cardinal signs of peritonitis; however, recent evidence has found little value as a sign. Studies have shown a wide variation in sensitivity (40–95%) and specificity (20–89%) and PLR 2.0.13