The impact of early sonographic evaluation on hospital admissions of children with suspected acute appendicitis

Early ultrasound (US) evaluation of children with abdominal pain and suspected acute appendicitis (AA) is an important diagnostic tool. Since 2007, US has become part of routine emergency room (ER) work-up performed for suspected pediatric AA in our hospital. We retrospectively compared hospital admissions from 2007 to 2008 with those from 2005 to 2006, when most ultrasounds were done after admission to Pediatric Surgery for observation. During the study (2005-2008), 6,511 children came to the ER with acute abdominal pain. Although pediatric ER sonography increased from 28.1% (865/3,079) in 2005-2006 to 51.7% (1,775/3,432) in 2007-2008 (p < 0.0001), hospitalizations decreased from 33 to 30.1% (p = 0.011). Concurrently, ER US for AA increased from 20.8% (639/2,440) to 38.9% (1,336/2,096) (p < 0.0001), admissions for suspected AA decreased from 51.8% (331/639) to 42% (561/1,336) (p < 0.0001). Sonography led to a significant decline in admissions and better selection of patients who required surgery for AA. Recurrent ER referrals for the same complaint within 2 weeks was very low (2.9%) with no difference between the two study periods (p = 1); none had AA. These findings encourage us to continue early US in children with suspected AA. This effective tool decreases unnecessary hospital stays, investigative procedures, and surgery, while reducing costs.