Measurement of the levator hiatus

Translabial three-dimensional sonogram showing the technique for identifying and measuring the levator hiatus. The shortest anterior-posterior distance between the symphysis pubis and the pubovisceral muscle in the mid-sagittal view is identified. The oblique axial image in this plane is used for the hiatal measurement. Video courtesy of Dr. Ka Lai Shek. See the related article by Shek et al (2009;113:1272-8).