Figure 3. Image of the plastic ruler and demonstration of how to measure the distance from the anterior abdominal wall to intraperitoneal structures during anterior abdominal wall elevation while patient lies in the supine position. The plastic ruler is advanced through the umbilicus into the abdominal cavity and held at a 90-degree angle with its tip touching the closest visceral organ, under camera observation through the assistant trocar. The distance between the parietal peritoneum on the anterior abdominal wall and visceral organs are measured in centimeters.