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2018 ; 8
(2
): e74-e78
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Complete Placenta Previa: Ultrasound Biometry and Surgical Outcomes
#MMPMID29686936
AJP Rep
2018[Apr]; 8
(2
): e74-e78
PMID29686936
show ga
Objective ?To evaluate the relationship between surgical outcomes and ultrasound
measurement of placental extension beyond the cervical os in women with placenta
previa. Study Design ?This is a retrospective cohort study of singleton
pregnancies with placenta previa undergoing third-trimester ultrasound and
delivering at our institution from 2002 through 2011. For study purposes, an
investigator measured placental extension, defined as the placental distance from
the internal os across the placenta continuing out to the lowest placental edge.
If morbidly adherent placentation was suspected, women were excluded. Receiver
operating characteristic (ROC) curves were developed for pertinent surgical
outcomes, and multivariate analysis was performed to determine the placental
extension with the best predictive discriminatory zone. Results ?In total, 157
women had placenta previa, ultrasound, and delivery data: 86 (55%) had a
placental extension of <40?mm, and 71 (45%) had a placental extension of ?40 mm.
Women with placental extension of ?40?mm had increased surgical time, blood
loss?>?2,000 mL, blood transfusion, and rate of peripartum hysterectomy. After
multivariate analysis, only peripartum hysterectomy and surgical time?>?90
minutes remained significant, p ? 0.05 and p ? 0.01, respectively. Conclusion ?In
women with placenta previa, the placental extension ultrasound measurement of
?40?mm is a predictor of adverse surgical outcomes.