Comparison of Changes in Urodynamic Testing After 5 Years of Deformity Correction Surgery in Patients With Idiopathic and Congenital Scoliosis Referred to the Neurosurgery Clinic of Sina Hospital, Tehran From September 2016 to September 2018; [مقایسه تغییرات تست یورودینامیک پس از گذشت پنج سال از عمل جراحی اصلاح دفورمیتی در بیماران اسکولیوز ایدیوپاتیک و مادرزادی مراجعه کننده به درمانگاه جراحی اعصاب بیمارستان سینا تهران]



Yarandi K K ; Fakhrabadi M P ; Anbaei S ; Dabbagh S ; Mollaghasem M M
Source: Tehran University Medical Journal Published:2025

Abstract

Background: Congenital scoliosis (CSC) and Idiopathic scoliosis (ISC) are complex spinal disorders that may involve neurological components affecting bladder function. Surgery remains the primary treatment for significant deformity, and in selected cases, correction of an associated tethered cord is also required. Given the potential interaction between spinal pathology and lower urinary tract function, this study examined changes in urodynamic findings before and after treatment in patients with CSC and ISC. Methods: This retrospective cross-sectional study included patients with scoliosis who were presented to the Neurosurgery Clinic at Sina Hospital between September 2016 and September 2018. Preoperative and postoperative urodynamic study (UDS) results were reviewed, and statistical analyses were performed using SPSS version 24. Results: Thirty-one patients were analyzed, consisting of 10 males (32.2%) and 21 females (67.7%), with a mean age of 14.18 years (median: 13 years). Among the 12 patients with CSC, 10 (83.3%) showed abnormal UDS prior to surgery. In contrast, 13 of 19 patients with ISC (68.4%) demonstrated normal baseline UDS. Following treatment, normalization occurred in 10 CSC patients (83.3%) and in 14 ISC patients (73.7%) (P=0.008). Before surgery, 15 of the 23 patients without a tethered cord (65.2%) had normal UDS, whereas all 8 patients with a tethered cord exhibited abnormal findings. Of the 12 patients with abnormal preoperative UDS, 3 (25%) showed no postoperative change, while 12 patients demonstrated normalization and 4 continued to show abnormal results (McNemar test, P=0.039). Improvement was also observed in 7 of the 8 patients (87.5%) with a tethered cord (P=0.57). Conclusion: Scoliosis surgery, particularly when combined with tethered cord release, was associated with meaningful improvement in urodynamic function. Urodynamic abnormalities were more common among CSC patients before intervention, and the presence of a tethered cord contributed to greater urinary dysfunction across both scoliosis types. These findings highlight the importance of thorough preoperative urodynamic assessment to guide management and anticipate postoperative outcomes. Copyright © 2025 Karimi Yarandi et al. Published by Tehran University of Medical Sciences. This work is licensed under a Creative Commons Attribution-Non-Commercial 4.0 International license (https://creativecommons.org/licenses/by-nc/4.0/). Non-commercial uses of the work are permitted, provided the original work is properly cited.