Related Experiment Video
Updated: Feb 8, 2026

Anogenital Distance and Perineal Measurements of the Pelvic Organ Prolapse POP Quantification System
Published on: September 20, 2018
Urethral mobility and Point Aa of the Pelvic Organ Prolapse Quantification (POP-Q) system before and after
Ho Seok Chung1, Sun-Ouck Kim1, Dongdeuk Kwon1
1Department of Urology, Chonnam National University Medical School, Gwangju, South Korea.
Objective:
The aim of the present study was to verify the usefulness of Point Aa as a substitute marker of the Q-tip angle and urethral mobility before and after midurethral sling operation for the treatment of stress urinary incontinence (SUI) in women.
Methods:
In this study, 118 women presenting with SUI who underwent the tension-free vaginal tape obturator (TVTO) procedure were prospectively examined and followed-up for ≥6 months after operation. Spearman's correlation coefficient was used to assess the degree of correlation between Point Aa of the Pelvic Organ Prolapse Quantification system and Q-tip angles before and after midurethral sling surgery.
Results:
There were significant postoperative changes in Point Aa (from -0.4 ± 1.9 to -2.7 ± 0.6; P = .001) and Q-tip angle (from 58.7 ± 19.4 to 15.4 ± 17.5 degrees; P =.001) compared with preoperative values. A fair correlation between Point Aa position and straining Q-tip angle was found before (r = 0.45, P = .05) and after (r = 0.49, P = .04) the procedure, with no significant difference in values before and after the procedure (P = .62).
Conclusions:
The results of the present study show fair correlation between the Point Aa position and straining Q-tip angle before and after midurethral sling surgery. Point Aa could be used as an indicator of urethral mobility after the TVTO procedure in women with SUI.
Related Concept Videos
Mitral Valve Prolapse I: Introduction
Muscles of the Pelvic Floor and Perineum
Perineal Layer
The perineum is a diamond-shaped area below the pelvic diaphragm, divided into an anterior urogenital triangle that contains the external genitals and a posterior anal triangle housing the anus. The urogenital...
Mitral Valve Prolapse II: Assessment and Management
Operational Amplifiers
Real Number Operations
Mitral Valve Prolapse III: Nursing Management

