Ob Placenta And Umbilical Cord
- 1.Fetal portion of the placenta is formed from
- A.
Chorion frondosum
- B.
Decidua basalis
- C.
Decidua vera
- D.
Yolk sac
- 2.Placenta weighs ____ grams at term.
- A.
500
- B.
600
- C.
800
- D.
950
- 3.What covers the placental surface?
- A.
Decidua capsularis
- B.
Amniotic membrane
- C.
Chorionic villi
- D.
Glisson's capsule
- 4.Check all that are true about placenta
- A.
Maternal and fetal blood mix in the placenta
- B.
Site of exchange of gas and nutrients between mom and fetus
- C.
Fetal portion is 1/5 of total placental weight
- D.
Can overcompensate for inadequacies
- E.
Maternal portion formed from decidua basalis
- F.
Produces hormones to maintain pregnancy
- G.
Composed of fibrous connective tissue
- H.
Highly vascular structure
- 5.Maternal and fetal portions of placenta are equal.
- A.
True
- B.
False
- 6.Placental migration
- A.
Movement of placenta in relation to internal os of cervix
- B.
As uterus grows, the placenta changes positions
- C.
Apparent change in position of placenta
- D.
Placenta covering the cervix
- E.
All of the above
- 7.Cystic areas visualized in placenta may indicate
- A.
Large fetal vessels
- B.
Fibrin deposits
- C.
Placental lakes
- D.
All of the above
- 8.What is the thickness of placenta after the 6th month?
- A.
~12mm
- B.
~15mm
- C.
~16mm
- D.
~18mm
- E.
~21mm
- 9.Based on these findings, what grade would you give the placenta?Indentations in chorionic plate with calcium deposits dispersed throughout placental tissue. Regular basal plate.
- A.
Grade 0
- B.
Grade 1
- C.
Grade 2
- D.
Grade 3
- 10.Grade 2 of the placenta is approximately how many weeks?
- A.
34
- B.
36
- C.
38
- D.
28
- 11.Grade 3 placenta
- A.
Linear densities extend to basal plate
- B.
Linear densities extend from chorionic plate but not reaching basal plate
- C.
Smooth without echogenic densities
- D.
Homogeneous placental tissue
- 12.
What is the hypoechoic area beneath chorionic plate?- A.
Venous lake
- B.
Fibrin deposit
- C.
Placenta previa
- D.
Large fetal vessels
- E.
Hematoma
- F.
Either B or E
- G.
Either A or B
- 13.How do you distinguish a fibrin deposit from a placenatl lake?
- A.
Placental lake will be hypoechoic
- B.
Impossible to distinguish
- C.
Placental lake will have slow blood flow
- D.
Fibrin deposit will be hyperechoic
- 14.Placenta Previa
- A.
Associated with placentomegaly
- B.
Best seen with an overfilled bladder
- C.
Placenta implants over or near internal os of cervix
- D.
All of the above
- 15.Risk factors for placenta previa
- A.
Multiparity
- B.
Advanced maternal age
- C.
Prior cesarean sections
- D.
All of the above
- E.
A and C
- 16.What is not a risk factor of placenta previa?
- A.
Premature delivery
- B.
Life-threatening maternal hemorrhage
- C.
Increased risk of placenta accreta
- D.
Increased risk of intraplacental lesions
- 17.What is the most common cause of painless 2nd and 3d timester bleeding?
- A.
Placenta previa
- B.
Placenta accreta
- C.
Succenturiate placenta
- D.
Circumvallate placeta
- 18.
Newly formed vessels between placenta and bladder wall indicate
- A.
Placenta accreta
- B.
Complete placenta previa
- C.
Placenta percreta
- D.
Venous lakes
- E.
Succenturiate placenta
- F.
Partial placenta previa
- 19.Attachment of placental membranes more towards the center (fetal portion) rather than to the placental margin
- A.
Circumvallate placenta
- B.
Placenta previa
- C.
Placenta accreta
- D.
Succenturiate placenta
- 20.Infarcts and necrosis are complications of what abnormality?
- A.
Placenta previa
- B.
Succenturiate placenta
- C.
Circumvallate placenta
- D.
Placenta accreta
- 21.External abruptio placenta may not always be seen on ultrasound.
- A.
True
- B.
False
- 22.A woman with painful vaginal bleeding comes in for an ultrasound. She is experiencing spasms in her uterus. On the ultrasound you visualize elevation of placenta from uterine wall. What is your diagnosis?
- A.
Concealed abruptio placenta
- B.
External abruptio placenta
- C.
Partial or complete placenta previa
- D.
Subchorionic hemorrhage
- E.
Placenta percreta
- 23.Umbilical vein carries
- A.
Oxygenated blood from placenta to fetus
- B.
Deoxygenated blood from fetus to placenta
- C.
Deoxygenated blood from placenta to fetus
- D.
Oxygenated blood from fetus to placenta
- 24.Umbilical arteries carry
- A.
Oxygenated blood
- B.
Deoxygenated blood
- C.
Both
- 25.Check all that apply to umbilical cord
- A.
Averate length 55 cm
- B.
Transports blood between fetus and fetal portion of placenta
- C.
2 arteries, 1 vein
- D.
Forms during first 2 weeks of gestation
- E.
Outer portion of cord is surrounded by Wharton's jelly
- F.
2 veins, 1 artery
- G.
Amnion covers umbilical cord
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