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COMPARISON OF FEMALE URETHRAL ANATOMY IN PATIENTS STRESS URINARY INCONTINENCE WITH CONTROL GROUP ON DYNAMIC PELVIC FLOOR MRI (DP-MRI)
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Abstract
Purpose: Comparison of female urethral anatomy in patients with stress urinary incontinence (SUI) with control group on pelvic floor MR imaging. Material and method: This prospective study was carried out on 43 female patients, including 22 patients with SUI (disease group) and 21 patients without SUI (control group), all underwent the pelvic floor MRI. The length, volume, transverse/ anteroposterior diameter, and the outer/ inner layer thickness of the urethra were measured on T2W pulse sequences. These parameters between two groups were compared to evaluate which anatomical structures affecting on SUI then calculate the AUC of these parameters for the diagnosis of SUI. Results: The mean age of the patients was 57.3±13.8 y.o (disease group: 53.9±12.6, control group: 60.8±14.4), the mean number of childbirths was 2.2±0.65, the vaginal delivery accounted for 73% in each group. There was no statistically significant difference (p>0.05) between the two groups in terms of length, transverse diameter, outer layer thickness of the urethra. In contrast, there was a statistically significant difference between the 2 groups in the volume (p=0.014), anteroposterior diameter (p=0.01), inner layer thickness of the urethra (p=0.04). The AUC of the volume, the anteroposterior diameter, the inner layer thickness of the urethra was 0.71, 0.70 and 0.69, respectively. Conclusion: Our study showed that the volume, the anteroposterior diameter, the inner layer thickness of the urethra was the anatomical structure affecting on SUI, although with the moderate sensibility and specificity for the SUI diagnosis.
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Keywords
Dynamic pelvic floor MRI, Stress urinary incontinence, Posterior urethra-vesical angle.
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