Clinical Expert Series
Abnormal Placentation: Placenta Previa, Vasa Previa, and Placenta Accreta
Robert M. Silver, MD
Obstet Gynecol 2015;126(3)
Continuing Medical Education credit is provided through joint sponsorship with
The American College of Obstetricians and Gynecologists.
ACCME Accreditation
The American College of Obstetricians and Gynecologists (the College) is accredited by the Accreditation Council for
Continuing Medical Education (ACCME) to provide continuing medical education for physicians.
AMA PRA Category 1 Credit(s)™
The American College of Obstetricians and Gynecologists designates this enduring material for a maximum of 2 AMA PRA
Category 1 Credits.™ Physicians should claim only the credit commensurate with the extent of their participation in the activity.
College Cognate Credit(s)
The American College of Obstetricians and Gynecologists designates this enduring material for a maximum of 2 Category 1
College Cognate Credits. The College has a reciprocity agreement with the AMA that allows AMA PRA Category 1 Credits™ to
be equivalent to College Cognate Credits.
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Current guidelines state that continuing medical education (CME) providers must ensure that CME activities are free from the
control of any commercial interest. All authors, reviewers, and contributors have disclosed to the College all relevant financial
relationships with any commercial interests. The authors, reviewers, and contributors declare that neither they nor any
business associate nor any member of their immediate families has financial interest or other relationships with any
manufacturer of products or any providers of services discussed in this program. Any conflicts have been resolved through
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Submission
Before submitting this form, please print a completed copy as confirmation of your program participation.
College Fellows: To obtain credits, complete and return this form by e-mail (obgyn@greenjournal.org) or fax (202-4790830). Your score, and a copy of the answer key, will be e-mailed to you after receipt of a completed quiz. Credit will be
recorded for those participants answering 80–100% of questions correctly. College Fellows may check their transcripts
online at http://www.acog.org, and any questions related to transcripts may be directed to educationcme@acog.org. For other
queries, please contact the Obstetrics & Gynecology Editorial Office, 202-314-2317 (phone) or obgyn@greenjournal.org (email).
Non–College Fellows: To obtain credits, submit the printout of the completed quiz to your accrediting institution. The printout
of the completed quiz is documentation for your continuing medical education credits.
Continuing medical education credit for “Abnormal Placentation: Placenta Previa, Vasa Previa, and Placenta Accreta” will
be available through September 2018.
1. A placenta that is near, but not overlying the cervical os, should be classified as a:
Internal placenta previa
Low-lying placenta
Low-segment placenta
Marginal placenta previa
Partial placenta previa
CME Quiz for the Clinical Expert Series
Obstet Gynecol 2015;126(3)
Credit available through September 2018
Page 1 of 3
2. The greatest source of morbidity for pregnancies with a placenta previa is related to:
Bleeding
Coagulopathy
Prematurity
Septicemia
Surgical complications
3. The most appropriate next step in the management of a patient with a suspected placenta previa found
on transabdominal ultrasonography is:
Computed tomography (CT)
Magnetic resonance imaging (MRI)
Repeat transabdominal ultrasonography in 4 weeks
Translabial ultrasonography
Transvaginal ultrasonography
4. A succenturiate placental lobe is associated with an increased risk of:
Placenta accreta
Placenta increta
Placenta percreta
Placenta previa
Vasa previa
5. The greatest cause of fetal mortality associated with vasa previa is
Exsanguination
Fetal growth restriction
Maternal hypovolemia
Prematurity
Vascular compression
6. The modality that provides the best diagnostic accuracy for vasa previa is:
Computed tomography (CT)
Magnetic resonance imaging (MRI)
Power Doppler
Three-dimensional ultrasonography
Transvaginal ultrasonography
CME Quiz for the Clinical Expert Series
Obstet Gynecol 2015;126(3)
Credit available through September 2018
Page 2 of 3
7. The greatest risk factor for placenta accreta is:
Advanced maternal age
Myomectomy
Pelvic radiation
Prior cesarean deliveries
Uterine curettage
8. Maternal complications of placenta accreta are primarily due to:
Adult respiratory distress syndrome
Anesthetic complications
Disseminated intravascular coagulation (DIC)
Hemorrhage
Thromboembolism
9. The most important modifier of clinical outcome in patients with placenta accreta is:
Autologous blood replacement
Pelvic vessel embolization
Placement of ureteral stents
Prenatal diagnosis
Subspecialist referral
10. For a planned cesarean hysterectomy in a patient with a placenta accreta, the most typical surgical
incision is:
Cherney
Maylard
Paramedian
Pfannenstiel
Vertical midline
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CME Quiz for the Clinical Expert Series
Obstet Gynecol 2015;126(3)
Credit available through September 2018
Page 3 of 3