FIGURE 5. Relationship between the intra-abdominal pressure and the infused volume. Intra-abdominal pressure (approximately 40 mm Hg) was rapidly generated through the intraperitoneal infusion of isotonic saline and then maintained constant for 120 minutes in anesthetized and ventilated animals. Each point is the average of measurements from 7 animals and presented as a mean value; bars = SD.