Management of blunt injury to the spleen in adults has been applied with increasing frequency. The purpose of this multi-institutional study was to determine which factors predict successful observation of blunt splenic injury in adults. The spleen is the most frequently injured organ following blunt abdominal trauma.Prompt recognition and appropriate scoring of splenic injury is vital for preventing the potentially disastrous complication of hemorrhage and hypovolemic shock. However, due to the well-recognized risks for post-splenectomy sepsis,routine splenectomy for injury has given way to the practice of splenic salvage, utilizing techniques of splenorrhaphy (repair of splenic laceration or rupture with sutures), nonoperative management of solid organ injury, and angiography with embolization, either singularly or in combination. We used the American Assoication for the surgery of trauma Classification for splenic injury.