OB ANESTHESIA EXAM 2025
QUESTIONS AND ANSWERS
What is another name for aortocaval compression - ....ANSWER ...-Supine
hypotension syndrome
when does aortocaval compression occur - ....ANSWER ...-Early pregnancy- as
early as 13 weeks
What happens in aortocaval compression - ....ANSWER ...-Uterus obstructs
venous return (IVC)
Aorta can also be compressed
What hemodynamic changes will you see in aortocaval compression
_SV
_CO
_BP
_HR
How will the body try to compensate? - ....ANSWER ...-Decreased SV
Decreased CO
....FOR STUDY PURPOSES...©️2025 ALL RIGHTS RESERVED... 1
,Decreased BP
Increased HR
Compensate by VC is lower extremities
What happens to UBF and fetal oxygenation in aortocaval compression? -
....ANSWER ...-Reduced
Aortocaval compression can be severe enough to cause what - ....ANSWER ...-Loss
of consciousness
How long until you see s/s aortocaval compression - ....ANSWER ...-May happen
quickly or up to 10 minutes
In aortocaval compression BP could be normal in _ but flow to _ and altered -
....ANSWER ...-Arms
Legs
With aortocaval compression, the __ the uterus, the __occlusion can be seen -
....ANSWER ...-Larger
More
Rx for aortocaval compression: Never allow mom to lie _ - ....ANSWER ...-On her
back
Where should you place bump on mom. What does this cause - ....ANSWER ...-
Under right hip
LUD
....FOR STUDY PURPOSES...©️2025 ALL RIGHTS RESERVED... 2
, What can you do if LUD not helpful - ....ANSWER ...-Turn to right
Speed of stages of labor depends on what 4 things - ....ANSWER ...-Parity
Fetal presentation
Maternal pelvis
Contraction pattern
1st stage of labor has how many stages - ....ANSWER ...-2-latent & active
1st stage of labor begins with what? Ends with what? - ....ANSWER ...-Begins with
onset of contractions and ends with full cervical dilation (10cm)
Cervix softens- little dilation occurs (2-3cm) - ....ANSWER ...-Latent phase
(beginning of 1st stage)
Dilation occurs - ....ANSWER ...-Active phase (end of 1st stage)
Afferent phase: __ supply of uterus via _ fibers - ....ANSWER ...-Afferent
C
Afferent nerve supply of uterus via _ fibers level __ to __ - ....ANSWER ...-C
T10 to L1
2nd stage of labor begins with what? Ends with what? - ....ANSWER ...-Begins
with full dilation and ends with delivery of infant
In this stage there is cervical dilation & fetal head descending —> compression &
stretching of pelvic muscles and ligaments - ....ANSWER ...-2nd stage of labor
....FOR STUDY PURPOSES...©️2025 ALL RIGHTS RESERVED... 3
QUESTIONS AND ANSWERS
What is another name for aortocaval compression - ....ANSWER ...-Supine
hypotension syndrome
when does aortocaval compression occur - ....ANSWER ...-Early pregnancy- as
early as 13 weeks
What happens in aortocaval compression - ....ANSWER ...-Uterus obstructs
venous return (IVC)
Aorta can also be compressed
What hemodynamic changes will you see in aortocaval compression
_SV
_CO
_BP
_HR
How will the body try to compensate? - ....ANSWER ...-Decreased SV
Decreased CO
....FOR STUDY PURPOSES...©️2025 ALL RIGHTS RESERVED... 1
,Decreased BP
Increased HR
Compensate by VC is lower extremities
What happens to UBF and fetal oxygenation in aortocaval compression? -
....ANSWER ...-Reduced
Aortocaval compression can be severe enough to cause what - ....ANSWER ...-Loss
of consciousness
How long until you see s/s aortocaval compression - ....ANSWER ...-May happen
quickly or up to 10 minutes
In aortocaval compression BP could be normal in _ but flow to _ and altered -
....ANSWER ...-Arms
Legs
With aortocaval compression, the __ the uterus, the __occlusion can be seen -
....ANSWER ...-Larger
More
Rx for aortocaval compression: Never allow mom to lie _ - ....ANSWER ...-On her
back
Where should you place bump on mom. What does this cause - ....ANSWER ...-
Under right hip
LUD
....FOR STUDY PURPOSES...©️2025 ALL RIGHTS RESERVED... 2
, What can you do if LUD not helpful - ....ANSWER ...-Turn to right
Speed of stages of labor depends on what 4 things - ....ANSWER ...-Parity
Fetal presentation
Maternal pelvis
Contraction pattern
1st stage of labor has how many stages - ....ANSWER ...-2-latent & active
1st stage of labor begins with what? Ends with what? - ....ANSWER ...-Begins with
onset of contractions and ends with full cervical dilation (10cm)
Cervix softens- little dilation occurs (2-3cm) - ....ANSWER ...-Latent phase
(beginning of 1st stage)
Dilation occurs - ....ANSWER ...-Active phase (end of 1st stage)
Afferent phase: __ supply of uterus via _ fibers - ....ANSWER ...-Afferent
C
Afferent nerve supply of uterus via _ fibers level __ to __ - ....ANSWER ...-C
T10 to L1
2nd stage of labor begins with what? Ends with what? - ....ANSWER ...-Begins
with full dilation and ends with delivery of infant
In this stage there is cervical dilation & fetal head descending —> compression &
stretching of pelvic muscles and ligaments - ....ANSWER ...-2nd stage of labor
....FOR STUDY PURPOSES...©️2025 ALL RIGHTS RESERVED... 3
