Placenta Previa, Placenta Accreta, and Vasa Previa

  title={Placenta Previa, Placenta Accreta, and Vasa Previa},
  author={Yinka Oyelese and John C. Smulian},
  journal={Obstetrics \& Gynecology},
Placenta previa, placenta accreta, and vasa previa are important causes of bleeding in the second half of pregnancy and in labor. Risk factors for placenta previa include prior cesarean delivery, pregnancy termination, intrauterine surgery, smoking, multifetal gestation, increasing parity, and maternal age. The diagnostic modality of choice for placenta previa is transvaginal ultrasonography, and women with a complete placenta previa should be delivered by cesarean. Small studies suggest that… 

Placenta Previa and Placenta Accreta

Perhaps the most important fetal consequence is prematurity with its associated sequelae, such as respiratory distress syndrome, high perinatal mortality, and long-term neurodevelopmental handicap.

Management of massive hemorrhage in pregnant women with placenta previa

Intraoperative anesthetic management and other interventions to control bleeding in patients with previa expected to experience massive hemorrhage and require transfusion are presented.

Clinical case of delivery of a pregnant woman with Vasa previa on the background of Placenta previa/accreta

A clinical case of Vasa previa on the background of Placenta previa / accreta in women with a burdened somatic and obstetric history and with 4 previous surgeries on the pelvic organs is described.

Prevalence and Fetomaternal Outcome of Placenta Previa at Salmaniya Medical Complex, Bahrain

It is highlighted that although risk factors increase the likelihood of placenta previa, it is necessary to rule it out in women with no known risk factors.

The Role of Interventional Radiology in the Management of Abnormal Placentation

Advances in technique, operator experience, the use of closure devices and IR suites fit for obstetric delivery may improve the efficacy and safety of theUse of prophylactic IIOBCs with and without embolisation.

Radiological evaluation of placental invasion anomalies: single center data

Early diagnosis and adequate preoperative preparation are of great importance particularly in cases with placenta previa totalis who are thought to have an invasion, and patients should be referred to tertiary centers with high-quality blood bank unit, adult intensive care unit and neonatalintensive care unit, where a multidisciplinary approach can be offered.

Placental abruption and placenta praevia

Pregnant women with placenta praevia or placental abruption are at a greater risk of premature delivery, fetal hypoxia and sudden fetal death, especially due to the increased risk of postpartum bleeding.

Placental and cord insertion pathologies: screening, diagnosis, and management.

Risk factors, diagnosis pathophysiology, and management options for these conditions, thus enabling the CNM/CM to provide safe, effective care and management, are reviewed.

Caesarean section in cases of placenta praevia and accreta.




Placenta Previa/Accreta and Prior Cesarean Section

To assess the relationship between increasing numbers of previous cesarean sections and the subsequent development of placenta previa and placenta accreta, the records of all patients presenting to

Sonographic placental localization in the determination of the site of uterine incision for placenta previa.

Data from patients who wish to be sterilized and in whom the site of placental implantation is directly beneath the lower uterine segment, as well as extending to an area in which a traditional classic cesarean section would be made, a paramedian incisional technique is of value.

Vasa previa: an avoidable obstetric tragedy.

Transvaginal ultrasound in combination with color Doppler is the most effective tool in the antenatal diagnosis of vasa previa and should be utilized in patients at risk, specifically those with bilobed, succenturiate-lobes, and low-lying placentas, pregnancies resulting from in vitro fertilization, and multiple pregnancy.

Clinical risk factors for placenta previa-placenta accreta.

Association of vasa previa at delivery with a history of second-trimester placenta previa.

There is a highly significant association between vasa previa at delivery and a history of second-trimester placenta previa.

Maternal complications with placenta previa.

A population-based retrospective cohort study including all women delivered in the province of Nova Scotia, Canada from 1988 to 1995 was performed and maternal complications included hysterectomy, which included the presence of placenta accreta and previous cesarean delivery.

Clinical significance of placenta previa detected at early routine transvaginal scan.

  • P. RosatiL. Guariglia
  • Medicine
    Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine
  • 2000
Although a high percentage of false‐positive results occur owing to the low prevalence at delivery, this screening procedure can identify high‐risk patients who should be rescanned later in pregnancy.

Placenta Accreta and Methotrexate Therapy: Three Case Reports

In view of the rapid resolution of vascular invasion of the bladder, methotrexate may have an important role in the management of placenta percreta with bladder invasion.

Placenta accreta: prospective sonographic diagnosis in patients with placenta previa and prior cesarean section

  • H. FinbergJ. Williams
  • Medicine
    Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine
  • 1992
Positive sonographic results suggest presence of numerous intraplacental vascular lacunae appears to be an additional risk criterion for placenta accreta, separate from the other criteria listed above.