2nd & 3rd Tri Fetal Position & Gen Scanning Techniques Flashcards
What do you use for reference to determine the position of the fetus?
maternal side
Longitudinal
transverse
Oblique

vertex
breech
Vertex – Head position toward cervix or inferior
Breech – Head position toward fundus or superior
what cross section is taken?
where is the babies spine?

long fetal lie w/ cephalic (vertex) presentation.
tranverse cross section of baby.

what is this postion?

long fetal lie w/ breech position
tranverse cross section of both

what position is this?

transverse fetal lie w/ head on maternal left
fetal transverse cross-section

what position is this?

trans fetal lie w/ head on maternal rt
fetal trans cross section

what position? how can you tell?

vertex. the bladder is sitting anterior to babies head. you can see hypechoic vagina, cervical bend adn endo cervical canal. they hyperechoic circle in the uterus is babies calvarian (head).

what position is this?

vertex
1st pic (top ant bottom post) you can see the anechoic stomach, the hearts on the left – putting baby spine to maternal lt and heart to maternal posterior.

what position is this?

breech.
front pic. notice vagina, internal cervix, anecoic amniotic fluid.
below. long midline. bladder as landmark. rump and spine anterior

position?

breech
(long) front - ant post, sup, inf. spine ant.
below - trans - ant, post, rt, lt. spine ant, uterus ant. placenta post. baby head post/rt

position?

transverse
front - trans on baby. bladder ant/lt of mom. belly of baby and placenta rt/post. cervix of mom posterior.
below (trans on baby -ant/post supe/inf). mom’s aorta and ivc posterior, placenta posterior

paptient prep for 2nd/3rd tri
Bladder only needs to be filled enough to visualize cervix well
Usually only do TA, still can TV if necessary
what do you need to determine when scanning?
scan through before taking pictures
Fetal number
Fetal position – Heart beat? Fetal head
Placental position
Fetal survey & size – Done following the above
required documentation / protocol
Uterus
Adnexa
Fetal Position
Placenta
Amniotic Fluid
Fetal Survey & Size
braxton hicks
contractions in which uterus thicker in that area. common. changes coutour of uterus for 30-45 minutes
what do you need to check for in the uterus?
check for masses
subchorionic bleeds (if placenta not adhered)
cervical length (over distended bladder can falsely lengthen)
bulging membranes (internal or external os fills with fluid)
when shoudl the corpus luteum regress and disappear?
by 16-18 weeks
below - adnexa

when should be able to get a good view of the placenta?
what else should you check at this time?
20 weeks
position, masses, bleeds, grade

placenta location and position

importance of scan plane documentation

where is this placenta located?

posterior

where is the placenta?

anterior
where is this placenta located?

lateral
what is this diagram showing?

placental grading
What are some good fetal imaging tips?
Watch focal zones
Watch depth
Use a linear transducer
Have a routine, avoid skipping around on every exam
Not used for routine scanning but, when information needed out weighs the risk






