Assessment of infrapubic arc angle using 3D perineal ultrasound and relation to obstetric parameters

Purpose: Perineal ultrasound has become a fundamental diagnostic tool in urogynecology in recent years. The investigated objects are mostly soft-tissue structures like urethra, bladder, uterus and anal canal. Due to recent advances in 3D ultrasound technology new planes have become accessible for assessment. Using 3D ultrasound in the C-plane we measured the angle between the two inferior rami of the pubic bone and the width of the interpubic gap. The angle of the infrapubic arc possibly enables us to presume the shape of the female pelvis and the possible impact on vaginal birth mechanism. Patients and methods:…