Fetal Positions Flashcards
what structures do we describe w/ regards to fetal position?
Use terms: Breech, Transverse, Vertex
Correlate to maternal abdomen: Stomach, spine as applicable (Maternal right and Maternal left)
Placenta location
descirbe this image (31 week fetus)
spine shows this is transverse on mom. liver is to maternal rt, spine anterior, stomach posterior/maternal lt
ant/post/rrt/lt. placenta posterior at fundus
18 weeks
placenta posterior
external os hyperechoic line
bladder
18 weeks
liver anterior, spine rt, stomach posterior, aorta and ivc seen posterior on mom
what plane was this image taken on mom? how can you tell?
long. cervix, vagina. seen . baby vertex
where is the bladder always located on mom in long?
how is the first midline image taken on mom?
inferior
in long
3rd tri
long (ant, post, sup, inf) bladder straighten and pushes bowel out of the way.
3rd tri
trans (ant, post, rt, lt)myometrium post, placenta ant (thicker. pooling blood oblique right, stomach posterior)
3rd tri
long (ant post, sup, inf)
placenta fills up most of inferior side w/ umbilical cord into placenta around midline.
3rd tri
trans (ant post rt lt)
venous pools of blood midline, placenta fills the left half (maternal side to the lt, babe side of placenta to the rt of the venous pools. vessels to the lt of the placenta
16 weeks
long
bladder (inf) baby superior, cervix, internal os (usually hyerechoic stripe) vabgina
16 weeks
long on mom. baby breech. mom’s bladder inf. rump facing inf, knee post
what position should this fetus be in in long or trans.
if in long baby stomach superior, spine anter = breech
if trans spine = ant, stomach = rt = vertex
what position would this fetus be in long/trans?
in long spine = post, stomach = inf = trans, head to mom’s rt
in trans – spine post, stomach lt = breech face ant
what positoin should this fetus be in long/trans?
in long - stomach inf spine ant baby trans w/ head to maternal rt and face post
in trans - spine ant stomach lt baby vertex head inf
what position should this fetus be in long/trans?
in long spine inf, stomach ant = trans head to maternal lt face supe
in trans - spine lt, stomach ant breech head supe face to moms right
what position should this fetus be in trans/long?
in long - spine supe, stomach ant baby trans head to mar rt
in trans - spine rt, stomach ant baby vertex hrad inf face to mat left
How was the transducer/beam going
through the fetal head to get this
image?
The ultrasound beam/transducer was placed longitudinal to the midline of the fetal face to produce the profile view
Where are the anterior & posterior
portions of this fetal head?
The thalami (t) point towards the posterior portion of the fetal head • The (v) is pointing to the anterior portion of the lateral ventricles • Cavum septum pellucidum (c) must be seen at the level of BPD to rule out anomalies and it is always anterior
To produce this image how was the transducer/beam in relation to the fetal face?
coronal to the face
Draw an imaginary line on this picture of the baby head that represents the ultrasound beam in relation to the fetal face that created this image
Beam is at an angle cutting through the face to be able to get the mouth (not chin), cheeks, a very little of the eyelid and the forehead
1st Draw an imaginary line on this picture of the baby head where the ultrasound beam would be in relation to the fetal head to create this image
• 2nd Hold the transducer appropriately over the head
• The transducer/beam is going through the fetal head axial or transverse
- 1st Draw an imaginary line on this picture of the baby head where the ultrasound beam would be in relation to the fetal head to create this image
- 2nd Hold the transducer angle where the ultrasound beam is going through the fetal head to get this image of orbits
The ultrasound beam is going through the fetal orbits in a transverse/axial cross-section, the face is anterior
Draw an imaginary line on this picture where the ultrasound beam is going to create this image
The beam is going through the nose,
nasal septum, lips and chin
Why is there an anechoic space between the upper and lower lips as well as in the nostrils?
The fetus has its’ mouth open and the amniotic fluid is in the mouth, amniotic fluid is in the nostrils as well and that is what makes the nasal septum easier to visualize
- What is being documented between the white arrows?
- What does the letter ‘m’ document?
The cerebellum is between the arrows and the cisterna magna is the ‘m’
Draw an imaginary line on this picture of the baby head where the ultrasound beam would be in relation to the fetal head to create this image
Not only are they documenting the posterior portion of the fetal brain but they have the body of the lateral ventricles (with choroid plexus) as well as the thalami
Draw an imaginary line on this picture of the baby head where the ultrasound beam would be in relation to the fetal head to create this image
The beam is going through the top/anterior portion of the fetal brain as well as the orbital sockets
The beam is symmetrical through the head as well
Draw an imaginary line on this picture of the baby head where the ultrasound beam would be in relation to the fetal head to create this image
This image is of the both lateral ventricles and is attained in a transverse/axial manner toward the top of the fetal head
Based on these 2 images which is the right
and left sides of the fetus?
Because the fetus is vertex and semi-prone
the sides of the fetus are
1st Place the transducer on the mannequin where the sonographer is holding the transducer to get this image
2nd Hold the transducer so the beam matches the scan plane used to get this image. Really look at the image & identify the portion of the uterus imaged.
Sonographer’s label to the uterus to document the location of the placenta
We know it is midline because of the label
Because we can see the rounded fundal portion of the uterus we know it is the superior portion of the uterus
How is the fetus positioned in this ultrasound image if it
is a long midline image? – Be specific & don’t go on yet, place the baby on the mannequin’s belly in the correct fetal position
Next, hold the transducer over the mannequin & baby the way the sonographer positioned the beam over the baby
The fetal position is vertex & prone
The transducer is longitudinal to the fetus getting spine and the head
Based on these 2 images place the baby on the mannequin the way this fetus is positioned in the uterus
It is vertex, laying on its’ left side with the
spine to maternal left
1st Place the baby on the mannequin according to the
fetal lie of this image (same case)
2nd Place the transducer on the mannequin where the sonographer is holding the transducer to get this image
3rd Hold the transducer so the beam matches the scan
plane used to get this image
The transducer is transverse to the fetus as well as transverse to mom
The transducer position would be more to the
maternal left and the fetus would be on its’ side with it’s spine on the left
Where is the placenta on this image/case?
The placenta is posterior with the edge
going to the left of the uterus on this image
1st Place the transducer on the mannequin
where the sonographer is holding the transducer to get this image
2nd Hold the transducer so the beam matches
the scan plane used to get this image
The sonographer is on the lower left quadrant of the
maternal abdomen with the transducer held longitudinal because they are getting an amniotic fluid volume or AFI & have it labeled ‘LL’ for left lower (quadrant) or LLQ
Where is the placenta on this image?
This is a very nice image of a posterior placenta
Note the fetal parts do not greatly shadow or cover the placenta – There is some shadowing
1st Place the transducer on the mannequin where the
sonographer is holding the transducer to get this image
2nd Hold the transducer so the beam matches the
scan plane used to get this image
The transducer is held transverse and
midline to get the placenta
Where are mom’s aorta and IVC on this
image? Can you identify them?
