AMBULATORY SURGERY TRENDS IN PEDIATRIC ANTERIOR CRUCIATE LIGAMENT RECONSTRUCTION: WHERE’S IT HAPPENING AND HOW MUCH CAN WE SAVE?

BACKGROUND: Benefits of ambulatory surgery include more efficient operations, lower cost, and patient preference. The national frequency of anterior cruciate ligament (ACL) reconstruction in children has increased three-fold compared other pediatric orthopaedic procedures, a trend that is likely attributable to an increased rate of ACL tears associated with year-round training and competition in young athletes. HYPOTHESIS/PURPOSE: The goal of this study was to utilize the Pediatric Health Information System (PHIS) to analyze the national trends towards ambulatory surgery for ACL reconstruction procedures and quantify the cost savings associated with the trend. METHODS: The PHIS database was queried using Common Procedural Terminology (CPT) and International Classification of Disease (ICD-9 and 10) codes for ACL reconstruction from 2009-2017. Patient information including gender, age at surgery, region (Northeast, South, Midwest, West) and hospital cost data for each procedure was collected. Cases were classified as ambulatory or non-ambulatory (inpatient or observation). Annual rates of ambulatory surgery were calculated for each procedure regionally for hospitals with cases included in each year of the query. The Consumer Price Index (CPI) was used to adjust procedural costs for inflation. Ambulatory and non-ambulatory costs were analyzed with the Wilcoxon Signed-Rank test. Trends in rates of ambulatory surgery were compared using joinpoint regression and annual percent change (APC). RESULTS: A total of 21,582 cases of ACL Reconstruction were identified from 33 different children’s hospitals from 2009-2017. More than half (50.3%) of the patients were female, and the average age at surgery was 15.4 years (± 2.1 years). The overall rate of ambulatory pediatric ACL reconstructions across the United States increased by 14.7% (APC 1.6%, 95% C.I. 0.8-2.4, p<0.01) from 2009 to 2017. Overall, this trend was most significant in the West (APC 2.0%, 95% C.I. 1.2-2.7, p<0.01), however in more recent years (2012-2017), there has been a similar significant increase in ambulatory pediatric ACL reconstruction in the South (APC 3.0%, 95% C.I. 1.7-4.3, p<0.01). The mean difference in median procedural cost between ambulatory and non-ambulatory ACL reconstructions was $3,145 ($13,866 vs. $10,721, p<0.01). This corresponds to national annual savings of 4.1% associated with the shift towards ambulatory surgery. CONCLUSIONS: From 2009-2017, there was a national trend towards performing pediatric ACL reconstruction in the ambulatory setting, which was accompanied by an annual 4.1% procedural cost savings. The feasibility of ambulatory surgery for other common pediatric orthopaedic surgeries should be explored in order to reduce healthcare costs.