Kazufumi Haino1,2, Keisuke Ishii3, Masako Kanda3, Asako Kanai3, Shusaku Hayashi3, Nobuaki Mitsuda3. 1. Department of Maternal Fetal Medicine, Osaka Medical Center and Research Institute for Maternal and Child Health, Izumi, Japan. haino730@med.niigata-u.ac.jp. 2. Department of Obstetrics and Gynecology, Niigata University Medical and Dental Hospital, 1-757 Asahimachi-dori, Chuo-ku, Niigata, 951-8510, Japan. haino730@med.niigata-u.ac.jp. 3. Department of Maternal Fetal Medicine, Osaka Medical Center and Research Institute for Maternal and Child Health, Izumi, Japan.
Abstract
AIM: This study aimed to investigate the impact of placental migration on the definitive prepartum diagnosis of patients with placenta previa (PP) and low-lying placenta (LLP) after late preterm. METHODS: This was a retrospective cohort study of singleton pregnancies with PP and LLP diagnosed at 30-33 weeks of gestation. We assessed the rate of changes in transvaginal ultrasonographic measurements of placental position during the period from 34 to 38 weeks of gestation. RESULTS: A total of 127 cases (82 of PP, 45 of LLP) were included. The PP group comprised 34 cases with complete PP and 48 with partial and marginal PP. The diagnosis of complete PP was changed to partial or marginal PP in two (5.9%) cases. Concerning cases with partial and marginal PP, 14 (29.2%) were eventually revised to LLP and four (8.3%) ultimately normalized. Among the patients with LLP, placental position was normalized in 23 (51.1%). Overall, a revision in diagnosis after late preterm was required in 48 cases (37.8%). Among the 93 patients who did not have complete PP, 46 (49.5%) needed revisions of their placental diagnosis. CONCLUSIONS: Repeated evaluations of placental position by ultrasonography after late preterm could be of significant value in selecting the most appropriate mode of delivery.
AIM: This study aimed to investigate the impact of placental migration on the definitive prepartum diagnosis of patients with placenta previa (PP) and low-lying placenta (LLP) after late preterm. METHODS: This was a retrospective cohort study of singleton pregnancies with PP and LLP diagnosed at 30-33 weeks of gestation. We assessed the rate of changes in transvaginal ultrasonographic measurements of placental position during the period from 34 to 38 weeks of gestation. RESULTS: A total of 127 cases (82 of PP, 45 of LLP) were included. The PP group comprised 34 cases with complete PP and 48 with partial and marginal PP. The diagnosis of complete PP was changed to partial or marginal PP in two (5.9%) cases. Concerning cases with partial and marginal PP, 14 (29.2%) were eventually revised to LLP and four (8.3%) ultimately normalized. Among the patients with LLP, placental position was normalized in 23 (51.1%). Overall, a revision in diagnosis after late preterm was required in 48 cases (37.8%). Among the 93 patients who did not have complete PP, 46 (49.5%) needed revisions of their placental diagnosis. CONCLUSIONS: Repeated evaluations of placental position by ultrasonography after late preterm could be of significant value in selecting the most appropriate mode of delivery.
Entities:
Keywords:
Late preterm; Low-lying placenta; Migration; Placenta previa; Transvaginal ultrasonography
Authors: F D'Antonio; C Iacovella; J Palacios-Jaraquemada; C H Bruno; L Manzoli; A Bhide Journal: Ultrasound Obstet Gynecol Date: 2014-06-02 Impact factor: 7.299