Mp40-18 Validating the Mimic Score as a Predictor of Successful Spontaneous Stone Passage in Patients Managed Conservatively for Ureteric Colic

You have accessJournal of UrologyStone Disease: Epidemiology & Evaluation I (MP40)1 May 2024MP40-18 VALIDATING THE MIMIC SCORE AS A PREDICTOR OF SUCCESSFUL SPONTANEOUS STONE PASSAGE IN PATIENTS MANAGED CONSERVATIVELY FOR URETERIC COLIC Thomas Milton, Peter Zhang, Jonathan Chieng, Justin Chow, Joseph Hewitt, Luke Stroman, and Denby Steele Thomas MiltonThomas Milton , Peter ZhangPeter Zhang , Jonathan ChiengJonathan Chieng , Justin ChowJustin Chow , Joseph HewittJoseph Hewitt , Luke StromanLuke Stroman , and Denby SteeleDenby Steele View All Author Informationhttps://doi.org/10.1097/01.JU.0001008788.18007.3f.18AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail Abstract INTRODUCTION AND OBJECTIVE: The MIMIC calculator is used to determine the probability of spontaneous stone passage (SSP) in acute ureteric colic. It was created by the British Urology Researchers in Surgical Training following the MIMIC study in 2019 using the results from a multicentre, retrospective cohort study that looked at the outcomes of 4170 patients. The objective of this study is to validate the MIMIC calculator as a predictor of SSP at a large tertiary hospital in Australia. METHODS: We conducted a retrospective cross-sectional study of consecutive patients presenting to our ED with acute ureteric colic between January 1st, 2021 and December 31st, 2022. The primary outcome was SSP, which was determined by the absence of need for further intervention. The factors associated with SSP as per the MIMIC calculator for each patient were recorded including gender, hydroureter, hydronephrosis, medical-expulsion therapy (MET), NSAID use, stone size, stone position, neutrophil count and white cell count. A MIMIC score was calculated. Jamovi was used to calculate student's t tests and chi squared tests as appropriate to test for association between factors. RESULTS: There were 399 patients included. The median age was 49 (IQR 37-60). There were 79% males. 52% of stones were left-sided. 33% of people were prescribed MET. The median stone size was 4mm (IQR 3-5). 72% of stones were distal, 8% middle and 20% proximal. 88% of stones passed spontaneously. The median MIMIC score was 84% (IQR 63%-88%). The stone position (p<0.001) and MIMIC score (p<0.001) were significantly associated with SSP. Patients who had successful SSP had a median MIMIC score of 85% and those that failed conservative management had a median MIMIC score of 64%. As shown in Figure 1, stone size was significantly associated with SSP (p<0.001). The mean stone size which failed SSP was 4.8mm compared to 3.8mm for successful SSP. Other factors were not significantly associated with SSP. Patients with larger stones were more likely to be provided MET (3.7mm vs. 4.6mm, p<0.001). CONCLUSIONS: As expected, the stone size and position were good predictors of SSP. The MIMIC score is a valid tool in determining the likelihood of SSP at our institution. Download PPT Source of Funding: None © 2024 by American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetails Volume 211Issue 5SMay 2024Page: e671 Advertisement Copyright & Permissions© 2024 by American Urological Association Education and Research, Inc.Metrics Author Information Thomas Milton More articles by this author Peter Zhang More articles by this author Jonathan Chieng More articles by this author Justin Chow More articles by this author Joseph Hewitt More articles by this author Luke Stroman More articles by this author Denby Steele More articles by this author Expand All Advertisement PDF downloadLoading ...