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Effect of an Evaluation Algorithm on CT Utilization in Identifying Appendicitis in Children
Kendra L Sikes1, Rebecca J Hart2, Yana Feygin1
1From the Interdisciplinary Research Group.
Insights
An appendicitis evaluation algorithm did not significantly change computed tomography (CT) use or length of stay (LOS) in pediatric patients. However, the algorithm was associated with a significant increase in emergency department (ED) length of stay.
Area of Science:
- Pediatric Emergency Medicine
- Diagnostic Imaging
- Clinical Algorithm Implementation
Background:
- Acute appendicitis is a common surgical emergency in children.
- Computed tomography (CT) and ultrasound are frequently used for diagnosis, impacting patient care and resource utilization.
- Standardized evaluation algorithms aim to optimize diagnostic pathways.
Purpose of the Study:
- To evaluate the impact of an appendicitis evaluation algorithm on CT utilization and length of stay (LOS) in pediatric patients.
- To determine if the algorithm led to significant changes in diagnostic imaging rates and patient disposition times.
Main Methods:
- Retrospective chart review of pediatric patients (3-18 years) evaluated for appendicitis.
- Data collected for 6 months pre- and post-algorithm implementation, with a 3-month washout period.
- Analysis of CT and ultrasound utilization rates, and emergency department (ED) LOS using statistical tests (chi-squared, Mann-Whitney U).
Main Results:
- No significant change in CT utilization (25.7% to 24.8%) or ultrasound utilization (59.5% to 59.7%).
- A significant increase in total ED median LOS was observed (333.50 to 362.00 minutes; P = 0.011).
- Factors associated with CT use included fever, pain migration, and right lower quadrant tenderness.
Conclusions:
- The implemented appendicitis evaluation algorithm did not significantly reduce CT utilization or LOS.
- High rates of equivocal ultrasound findings may contribute to continued CT use and increased LOS.
- Further refinement of diagnostic strategies is needed to optimize care for pediatric appendicitis evaluations.
Objective:
Our objective was to determine if there was a significant change in computed tomography (CT) utilization or length of stay (LOS) among patients evaluated for acute appendicitis after implementation of an appendicitis evaluation algorithm.
Methods:
We conducted a retrospective chart review of patients aged 3-18 years in an urban, tertiary pediatric emergency department with acute abdominal pain, evaluated for appendicitis. Data were collected for 6 months preimplementation and postimplementation of the evaluation algorithm with a 3-month washout period between September 2018 and November 2019. Main outcomes were rate of CT utilization and LOS preimplementation and postimplementation and were analyzed using χ 2 test and Mann-Whitney U test, respectively. Descriptive analysis of demographics was performed, in addition to logistic regression to assess differences between the 2 study periods.
Results:
A total of 2872 charts were identified with a chief complaint inclusive of "abdominal pain." Of these, 1510 met age requirements but did not meet at least 1 inclusion criteria; 229 more were excluded upon chart review for a final study sample of 1133 patients. Of these, 648 (57.2%) were female, 747 (65.9%) were White, and 988 (87.2%) were non-Hispanic. The majority of patients (770, 68%) were discharged home from the emergency department without a diagnosis of acute appendicitis. Neither CT (25.7% to 24.8%; P = 0.794) nor ultrasound (59.5% to 59.7%; P = 1.000) utilization significantly changed postimplementation. Total ED median LOS increased significantly (333.50 to 362.00 minutes; P = 0.011). Significant factors associated with CT utilization included fever, migration of pain, and right lower quadrant tenderness. Significant factors associated with appendicitis diagnosis included right lower quadrant pain, nausea/vomiting, migration of pain, and peritoneal signs.
Conclusions:
Overall, the appendicitis evaluation algorithm did not significantly decrease CT utilization or LOS. Equivocal grade 2 or 3 ultrasound finding rates were high, likely leading to higher rates of CT utilization and increasing LOS.
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