Predicting Incomplete Uterine Rupture With Vaginal Sonography During the Late Second Trimester in Women With Prior Cesarean

Effective anatomical and functional status of the lower uterine segment at term: estimating the risk of uterine dehiscence by ultrasound

“…All of these studies indicate that a thickness less than 2.3-2.5 mm for the entire LUS is associated with uterine scar defects (18). Gotoh et al recorded intrapartum incomplete uterine rupture in 17 of 23 women (74%) with a LUS thickness of less than 2.0 mm (27).…”

2D versus 3D transabdominal sonography for the measurement of lower uterine segment thickness in women with previous cesarean delivery

“…Various techniques have been used to measure the LUS, including transabdominal (TA) and transvaginal approaches. In some studies [5,9,10], the entire full LUS thickness was measured, whereas only the inner myometrial layer was included in the measurement in other studies [6,11,12]. However, almost all studies reported up-to-date use of 2D sonography in measuring the LUS.…”

Uterine Rupture as a Source of Obstetrical Hemorrhage

“…80 The thickness in the late third trimester is reduced in those women with a prior CD as compared with those without. 80 Patients and physicians perhaps feel more comfortable allowing TOLAC with a thicker lower uterine segment (eg, Z3.5 mm).…”

“…[78][79][80][81][82] This thickness is typically defined as the shortest distance between 2 interfaces: the bladder wall/myometrium and myometrium/chorioamnion, using a combination of transabdominal and transvaginal sonography. These prospective studies are summarized in Table 5.…”