Sonographic Findings of Pediatric Intussusception : Comparison between the Reduced and Non-reduced Group

To determine the negative predictive findings of ultrasonography in intussusception reduction, we compared the ultrasonographic findings in reduced and non-reduced groups in pediatric intussusception. A retrospective evaluation of the 35 non-reduced and 73 reduced cases of intussuception was performed. The diagnosis was made initially by ultrasonography and confirmed by barium enema using gastrografin between 1993 and 1995. Ultrasonographic findings included thickness of outer colonic wall of the intussusception, diameter of the target, number of the lymph nodes, associated ascites and relapsed time after onset of symptoms. The thickness of the outer wall of the intussuception were 4.0∼9.5 mm (mean : 6.08 ± 1.04) in reduced group and 5.3∼11.6 mm (mean : 7.55 ± 1.16) in non-reduced group (p < 0.05). The diameter of the target were 18.9∼33.7 mm(mean : 27.0 ± 3.39) in reduced group and 19.1∼33.7 mm (mean : 25.8 ± 3.93) in non-reduced group (p > 0.05). Lymph adenopathy was seen in 65 (89%) cases in reduced group and 31 (89%) cases in non-reduced group, and average number of lymph nodes were 1.46 and 1.58 respectively. Ascites was seen in 9 (12.3%) cases of reduced and 12(34.3%) in non-reduced group (p < 0.05). The onset of symptoms presented 24 hours or longer prior to the diagnosis was 17 (23.3%) in reduced group and 17 (48.6%) in non-reduced group (p < 0.05). 7.55 mm or greater outer wall of the intussusception and associated ascites seen in ultrasonography, and the onset of symptoms 24 hours or longer prior to study can be used in negative predictive findings in intussusception reduction