Female III (Obstetric) Flashcards
1
Q
is US sufficient to assess pregnancy
A
NO
2
Q
ok .. what about trasvaginal sonography is it sufficient to rule out ectopic pregnancy
A
again, NO
3
Q
what is the Sonographic Signs of Pregnancy
A
- Decidual thickening
- Peri-sac flow
- Intra-decidual sac sign
- Double decidual sign
- Yolk sac sign
- Double bleb sign
4
Q
what is Pseudo Sac Sign
A
- Small central fluid collection in endometrial cavity (common in ectopic pregnancy).
- Echogenic borders differentiate from intrauterine fluid collection.
- Eccentric location suggests intrauterine pregnancy (IU) over ectopic pregnancy.
5
Q
Double Decidual Sac Sign
A
- Intrauterine fluid collection surrounded by two concentric echogenic rings.
6
Q
First Identifiable Structure in Gestational Sac
A
Yolk sac
7
Q
Important Numbers about Yolk Sac
A
- Visible at 5–5.5 weeks.
- Diameter not > 6mm.
- One yolk sac give 1–2 embryos.
8
Q
when the Embryonic Pole is seen
A
Seen at 5–6 weeks.
9
Q
Ring Sign
A
Yolk sac + embryonic pole.
10
Q
Double Bleb Sign
A
Amnion adjacent to yolk sac.
11
Q
when the Cardiac Activity is seen
A
Seen at 6–7 weeks.
or when the CRL (5-7 mm)
CRL = crown-rump length
12
Q
Diagnosis of Embryonic Demise
A
- Absent cardiac activity with CRL > 5–7mm.
- Absent cardiac activity at gestational age > 7 weeks.
- Absent cardiac activity with embryo seen by TAS.
- Anembryonic pregnancy.
13
Q
triad of Molar Pregnancy
A
- High beta-hCG.
- Snowstorm appearance.
- Theca lutein cysts.
14
Q
Radiological Description of Molar Pregnancy
A
Echogenic mass with multiple cystic spaces.
15
Q
Landmarks for Biparietal Diameter & Head Circumference
A
- two Thalami
- Cavum septum pellucidum
- Falx
- two lateral ventricles
