A catheter is introduced through the incision into the abdomen. Saline is infused into the abdomen through the catheter, and then removed. If blood is present in the saline after removal, it is highly probable that there is a serious intra-abmoninal injury.
Review Date 1/29/2017
Updated by: Michael M. Phillips, MD, Clinical Professor of Medicine, The George Washington University School of Medicine, Washington, DC. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.