Visualization of Polypropylene and Polyvinylidene Fluoride Slings in Perineal Ultrasound and Correlation with Clinical Outcome
Figure 2
Measuring the sling position using a virtual coordinate system in perineal ultrasound, including symphysis (S), its central line equaling the -axis (X), the -axis, bladder (B), urethra (U), and the sling (brown coloured bar). (a) illustrates the movement of the lower urinary tract from resting state (red, coordinates ) to the position during straining (blue, ). The sling moves caudally along the green arrow (distance ). (b) presents the movement in the opposite direction (cranial) from resting state (red, position ) to the position during pelvic floor contraction (grey, position ). (c) is a picture taken from perineal ultrasound, applying the coordinate system. is the distance from the sling to the anterior wall of the urethra (which equals the -axis).
