Evaluation of Splenic Injury by Computed Tomography and its Impact on Treatment

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Abstract
We reviewed 37 consecutive, hemodynamically stable patients (16 adults, 21 children) who had splenic injuries diagnosed by computed tomography (CT) scan to compare the CT evaluation with operative assessment of injury and eventual treatment. Computed tomographic scans and operative findings were graded by a splenic injury scoring system. Two patients were classified as having grade 1, 21 as grade 2, 11 as grade 3, and 3 as grade 4 splenic injuries. Computed tomography underestimated the degree of injury in 9 of 17 (53%) operated patients (mean CT score, 2.6; mean operative score, 3.3; p less than 0.01). Six of sixteen adults and 19 of 21 children were intentionally treated by observation. There were 5 treatments failures (20%), 3 due to bleeding and 1 each due to pancreatic injury and splenic abscess. The failure rate of observation was lower in children (16%) than in adults (33%), even though children had a higher Splenic Injury Score (2.4 versus 1.8). Patients who underwent an operation received twice as much blood as the observed group. There was no significant difference in Injury Severity Score or total fluid requirements between operated and observed patients. Operations increased in frequency in both adults and children as the injury score increased. This experience suggests that CT scan accurately determines the presence of splenic injury but commonly underestimates its severity. While children with grades 1 through 3 injuries are likely to be treated successfully with observation, adults who have more minor splenic injuries often fail observation and may be treated better by prompt operation.

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