NONOPERATIVE MANAGEMENT OF SPLENIC TRAUMA 1367 Table 1 . Splenic injury Grading Based on CT Scan at Time

l Numerous studies have demonstrated success with nonoperative management of splenic injuries in pediatric patients. However, the resolution of the splenic injury has not been previously evaluated. The records of 50 pediatric patients with splenic injuries from blunt trauma treated nonoperatively between 1964 to 1992 were reviewed retrospectively. Abdominal computed tomography (CT) was performed at the time of injury and 6 weeks postinjury in 25 patients. These scans were reviewed and categorized by a modification of a previously reported grading system for parenchymal injury. All patients had healing of the splenic injuries, with complete resolution of the healing process observed at 6 weeks postinjury in 44%. Even those with shattered spleens (n = 6) had consistent improvement in splenic architecture, with resolution of fractures and/or contusions and return of splenic perfusion. Ten (77%) of 13 grade 1 and 2 injuries were completely resolved by the g-week follow-up examination, whereas only one (6%) of 12 grade 3 to 5 injuries showed radiological resolution of splenic injuries. None of the 25 follow-up CTscans affected clinical decision-making or led to a deviation from the established protocol, which included a 3-month period of reduced activity. All 50 patients did well, without evidence of morbidity, mortality, or complications after return to full activity 3 months postinjury. These CT scan results and clinical data show (1) radiological resolution of splenic injury, with return toward a normal appearance by 6 weeks postinjury, (2) uniform success of nonoperative management of splenic injury in children, (3) that follow-up CT scans may be used to indicate earlier return to full activity in most cases of grade 1 and 2 splenic injuries, but otherwise they do not appear to contribute to the clinical management of the child after nonoperative treatment of splenic trauma. Copyright o 1994 by W. B. Saunders Company