• K W Herbst, H Thaker, G M Lockwood, J I Hagadorn, S Masoud, and P Kokorowski.
• Division of Urology and Nephrology, Department of Research, Connecticut Children's Medical Center, Hartford, CT, USA. Electronic address: kherbst@connecticutchildrens.org.
• J Pediatr Urol. 2018 Apr 1; 14 (2): 158.e1-158.e7.

Introduction/BackgroundMetachronous contralateral inguinal hernias (MCH) occur in approximately 10% of pediatric patients following unilateral inguinal hernia repairs (UIHR). Laparoscopic evaluation of the contralateral internal ring is a method of identifying high-risk individuals for prophylactic contralateral exploration and repair.ObjectiveThe objective of this study was to assess variation in utilization of diagnostic laparoscopy, and report costs associated with the evaluation of a contralateral patent processus vaginalis during hernia repair in pediatric hospitals.Study DesignThe Pediatric Health Information System database was searched to identify outpatient surgical encounters for pediatric patients with a diagnosis of inguinal hernia during a 1-year period (2014). Records were identified that contained diagnostic codes for unilateral or bilateral inguinal hernia in combination with a procedure code for open hernia repair with or without diagnostic laparoscopy.ResultsAfter exclusions there were 3952 hernia repairs performed at 30 hospitals; median age was 4 years (IQR 1-7), 78.8% were male, and 64.9% Caucasian. Three-quarters (76.7%) had UIHR, 8.6% had unilateral repairs with laparoscopy (UIHRL), 12.2% had bilateral inguinal hernia repairs (BIHR), and 2.4% had bilateral repairs with laparoscopy (BIHRL). Where laparoscopy was used, 78% resulted in a unilateral repair and 22% in a bilateral procedure. The percent of patients undergoing laparoscopy varied from 0 to 57% among hospitals, and 0-100% among surgeons. Pediatric surgeons were more than three times more likely to perform a diagnostic laparoscopy compared with pediatric urologists. Median adjusted costs were $2298 (IQR 1659-2955) for UIHR, $2713 (IQR 1873-3409) for UIHRL, $2752 (IQR 2230-3411) for BIHR, and $2783 (IQR 2233-3453) for BIHRL. Median costs varied over two-fold among hospitals ($1310-4434), and over four-fold among surgeons ($948-5040).DiscussionData suggested that <10% of patients with clinically unilateral inguinal hernias developed MCH. A negative diagnostic laparoscopy ensured that 0.9-1.31% developed MCH. However, up to 30% of patients underwent contralateral exploration/repair when diagnostic laparoscopy was used. The current study found increased costs associated with the use of laparoscopy, with considerable variation in costs among surgeons and hospitals. These data elucidate competing financial and clinical consequences associated with the use of diagnostic laparoscopy with clinically unilateral hernias.ConclusionsVariation existed in the use of laparoscopy during inguinal hernia repairs and associated costs within the current sample from children's hospitals in the United States. The additional costs of laparoscopic evaluation must be considered against the clinical utility and therapeutic consequences of identifying individuals with a higher risk of metachronous contralateral inguinal hernia.Copyright © 2017 Journal of Pediatric Urology Company. Published by Elsevier Ltd. All rights reserved.

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