JDMS Article - SDMS CME Credit

Article: Introducing a New Predictor of Chorionicity in the Second and Third Trimesters: The “Cleft Sign”

Authors: Leila Bayani, MD, Seyedeh Nooshin Miratashi Yazdi, MD, MPH, and Fateme Parooie, MD

Category: OB/GYN [OB]

Credit: 0.75 SDMS CME Credit

Objectives: After studying the article titled “Introducing a New Predictor of Chorionicity in the Second and Third Trimesters: The “Cleft Sign,” you will be able to:

1. Differentiate between T-sign and lambda sign

2. Define “cleft sign”

3. Describe the usefulness of using the “cleft sign” in second and third trimester of pregnancy to determine chorionicity

1. What is the ideal time frame in pregnancy to determine chorionicity?

2. 11+0 and 13+6 weeks of gestation

3. 14+0 and 19+6 weeks of gestation

4. 20+0 and 25+6 weeks of gestation

What was the accuracy rate of chorionicity using T-sign and lambda sign in the study by Dias et al?

89.8%

97.4%

99.8%

100%

What percentage of monochorionic (MC) twin pregnancies has two placental masses on sonography?

3%

10%

15%

25%

According to Figure 1, how many pregnancies demonstrated the “cleft sign?”

3

8

15

24

A hypoechoic linear cleft in continuity of intertwine membranes at the attachment site to the chorionic plate is termed?

T-sign

Lambda sign

“Cleft sign”

Twin peak sign

According to Table1, what was the mean gestational age?

4.1

8.3

26.4

27.9

According to the study by Blumenfeld et al., the odds of incorrect chorionicity detection rate rose by what percentage for each week of increase in the gestational age?

5%

10%

15%

20%