POCUS for pediatric appendicitis in the pediatric emergency department: An 8-year retrospective review.

Background: In many centers, pediatric radiology-performed ultrasound and/or POCUS fellowship training are not readily available.

Objective: To present our experience using point of care ultrasound (POCUS) in a pediatric emergency medicine training program without POCUS fellowship-trained staff, and to demonstrate that POCUS of the appendix is feasible outside the context for POCUS fellowship training.

Methods: We identified children diagnosed with appendicitis or periappendiceal abscess from June 2016 to June 2024. Variables reviewed include details of PED visit such as presenting symptoms, laboratory and imaging results, and PED treatment, as well as surgical report and pathology result. We evaluated the frequency and performance characteristics of POCUS over the study period.

Results: 999 children were diagnosed with appendicitis. POCUS was performed in 360 of 845 cases (43%) of histology-confirmed appendicitis and in 19 of 69 cases (28%) in which histology was negative for appendicitis. Both the number of POCUS examinations for appendicitis and the percentage of examinations correctly identifying appendicitis steadily increased over the study period. Accuracy was highest in the 5-10-year age range and lowest for females from 10 to 15 years. In 96% of cases with a pathology result of appendicitis and a positive POCUS examination, POCUS correctly identified appendicitis. However, only 6 of 19 POCUS examinations in children without appendicitis on histology found no appendicitis. Performance of POCUS for appendicitis was significantly associated with increased opioid administration and a 20-min mean decrease in length of pediatric emergency department stay.

Conclusions: POCUS for appendicitis within the context of PEM fellowship training is feasible and associated with decreased length of stay.