Figure 4 —

(A) The small 21-gauge introducer needle is connected through a connection tube to a syringe filled with nonionic contrast. (B) Fluoroscopic image after injection of 5 mL nonionic contrast into the peritoneal cavity. Free spread of the contrast material outlines the outer surface of the bowel loops and confirms successful entry into the peritoneal cavity. (C) Fluoroscopic image after injection of 5 mL nonionic contrast demonstrates contrast outlining the colonic haustra, indicating inadvertent colonic puncture.