Unnecessary use of radiology studies in the diagnosis of inguinal hernias: a retrospective cohort study
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and Other Interventional Techniques
Unnecessary use of radiology studies in the diagnosis of inguinal hernias: a retrospective cohort study Natalie Liu1 · Tyler M. Prout2 · Yiwei Xu1 · Jeremy Smith3 · Luke M. Funk1,4 · Jacob A. Greenberg1 · Amber L. Shada1 · Anne O. Lidor1 Received: 26 May 2020 / Accepted: 25 August 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Background The diagnosis of inguinal hernias is predominantly based on physical exam, although imaging may be used in select cases. The objective of this study was to determine the frequency of unnecessary imaging used in the diagnosis of inguinal hernias. Methods Patients who underwent elective inguinal hernia repair at a large academic health system in the U.S. from 2010 to 2017 were included. Within this cohort, we identified patients who received imaging 6 months prior to surgery. Through chart review of physical exam findings and imaging indications, we categorized patients into four imaging categories: unrelated, necessary, unnecessary, and borderline. Multivariable logistic regression analysis was used to identify factors associated with receipt of unnecessary imaging. Results Of 2162 patients who underwent inguinal hernia surgery, 249 patients had related imaging studies 6 months prior to surgery. 47.0% of patients received unnecessary imaging. 66.9% and 33.1% of unnecessary studies were ultrasounds and CT scans, respectively. 24.5% of patients had necessary studies, while 28.5% had studies with borderline indications. On multivariable analysis, having a BMI between 25.0 and 29.9 kg/m2 was associated with receipt of unnecessary studies. Primary care providers and ED physicians were more likely to order unnecessary imaging. Conclusions Nearly 50% of all patients who receive any related imaging prior to surgery had potentially unnecessary diagnostic radiology studies. This not only exposes patients to avoidable risks, but also places a significant economic burden on patients and our already-strained health system. Keywords Hernia · inguinal · Radiology · General surgery · Outcome assessment · Health services research Presented as an oral presentation at the Wisconsin Surgical Society 2018 Conference on November 2, 2018, in Kohler, WI, and as an oral presentation at the Academic Surgical Congress 2019 Conference on February 7, 2019, in Houston, TX. Electronic supplementary material The online version of this article (https://doi.org/10.1007/s00464-020-07947-0) contains supplementary material, which is available to authorized users. * Anne O. Lidor [email protected] 1
Division of Minimally Invasive, Foregut, and Bariatric Surgery, Department of Surgery, University of Wisconsin School of Medicine and Public Health, 600 Highland Ave, Madison, WI 53792‑7375, USA
2
Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
3
Department of Internal Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
4
William S.
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