OB Anesthesia Practice UPDATED ACTUAL Exam Questions and CORRECT Answers

OB Anesthesia Practice UPDATED
ACTUAL Exam Questions and CORRECT
Answers
___ interacts with the trophoblast:
A. Decidua basalis
B. Decidua capsularis

C. Decidua parietalis - CORRECT ANSWER - A. Decidua basalis


___ encapsulates the embryo on the luminal side:
A. Decidua basalis
B. Decidua capsularis

C. Decidua parietalis - CORRECT ANSWER - B. Decidua capsularis


___ surrounds the uterus:
A. Decidua basalis
B. Decidua capsularis

C. Decidua parietalis - CORRECT ANSWER - C. Decidua parietalis


Maternal blood flow to the placenta originates from which artery? - CORRECT
ANSWER - Internal Iliac Artery



How much blood flow reaches the placenta at term? - CORRECT ANSWER - 700-900
mL/min.


Place the following in order for maternal-fetal circulation.


Internal iliac artery

,Right atrium
IVC
Umbilical artery
Left atrium
Left ventricle
Patent foramen ovale
Right ventricle
Ductus arteriosus
Ductus venosus
Pulmonary artery
Aorta

Placenta - CORRECT ANSWER - 1. Internal iliac artery
2. Umbilical artery
3. Placenta
4. Ductus venosus
5. IVC
6. Right atrium
7. PFO --> Left atrium --> Left ventricle
8. Right ventricle --> Pulmonary artery --> Ductus arteriosus
9. Aorta


The structure that diverts oxygenated blood from the right atrium to the left atrium:
A.
Foramen ovale
B.
Ductus arteriosus
C.
Ductus venous

,D.

Pulmonary trunk - CORRECT ANSWER - A.
Foramen ovale


The foramen ovale is a small opening between the right and left atria of the fetal heart. During
fetal development, it allows oxygenated blood to bypass the non-functioning lungs and flow
directly from the right atrium to the left atrium. This is important because the lungs are not yet
fully developed and cannot efficiently oxygenate blood. After birth, the foramen ovale typically
closes as a flap of tissue seals the opening, redirecting blood flow to the lungs for oxygenation.


The structure that diverts oxygenated blood from the pulmonary trunk to the fetal aorta:
A.
Foramen ovale
B.
Ductus ateriosus
C.
Ductus venous
D.

Pulmonary trunk - CORRECT ANSWER - B.
Ductus ateriosus


The correct answer is ductus ateriosus. During fetal development, the ductus ateriosus is a blood
vessel that connects the pulmonary trunk to the aorta, bypassing the lungs. This allows
oxygenated blood to be directed away from the non-functioning fetal lungs and towards the rest
of the body. After birth, the ductus ateriosus normally closes, redirecting blood flow to the lungs
for oxygenation.


Following circulation, deoxygenated fetal blood returns to the placenta via the:
A.
Umbilical arteries
B.

, Umbilical veins
C.
Spinal arteries
D.

Uterine veins - CORRECT ANSWER - A.
Umbilical arteries


The umbilical arteries carry deoxygenated blood from the fetus to the placenta. This blood is rich
in waste products and carbon dioxide, which need to be removed. The placenta acts as a filter,
allowing the exchange of nutrients, oxygen, and waste products between the mother and the
fetus. Once the blood is oxygenated and waste products are removed in the placenta, it returns to
the fetus through the umbilical veins.


Widening of the cervix is (dilation/effacement) - CORRECT ANSWER - Dilation


Shortening and thinning of the cervical canal is considered (dilation/effacement). - CORRECT
ANSWER - Effacement


What information should you ascertain on a patient whom is pregnant who presents for delivery?
- CORRECT ANSWER - Any prenatal care?
Pertinent past medical history


Gestational age
Parity
Presentation
Last oral intake
Membrane status
Cervical dilation
Effacement
Station