SONO 121 The Placenta (Answered)
Updated Fall 2024/2025.
what is the decidua basalis
reaction that occurs between blastocyst and myometrium
Decidua capsularis
reaction occuring over blastocyst closest to endo cavity
decidua vera
endo cavity not affected by pregnancy
know the diagram
forms the fetal part of the placenta containing the villi
chorion fondosum
nonvillious part of chorion around gestational sac
chorion laeve
fetal surface of the placenta
chorionic plate
maternal surface of the placenta
basal plate
functional endocrine units of the placenta
chorionic villi
battledore placenta
marginal insertion, 2cm from placenta edge
velamentous placenta
cord inserts into the membrane before entering placenta, when covering OS it is called vasa previa
implantation of placenta within the lower uterine segment
, placenta previa
the umbilical cord forms during the ____ week of gestation and is surrounded by mucoid connective
tissue called____
5 weeks
whartons jelly
insertion into the ventral abd wall is important because scrutiny of the area can reveal defects such as
omphalocele
gastroschisis
limb body wall complex
normal umbilical has ____ vein and ____ artery
1 vein
2 arteries
when does the UB form and sono appearance
early as eight weeks
homogenous, mid level gray, smooth borders
thickness varies with gestational age, but is usually ___ cm in fetuses less than 23 weeks
2-3 cm
the placenta should not be greater than
4cm in thickness
cystic structures are ___ and are observed coursing behind ___ and ___ layers
vessels
coursing behind chorionic plate and between amnion and chorion layers
placenta lake
sonolucencies
normal finding
may change shape
blood flow usually not seen
shows slow swirling flow
how do we evaluate placental location
-long side to side
-trv from inferior-superior
check cord insertion
inferior edge to evaluate relationship to cervical os
when evaluting the placenta, what should we have our patient do
Updated Fall 2024/2025.
what is the decidua basalis
reaction that occurs between blastocyst and myometrium
Decidua capsularis
reaction occuring over blastocyst closest to endo cavity
decidua vera
endo cavity not affected by pregnancy
know the diagram
forms the fetal part of the placenta containing the villi
chorion fondosum
nonvillious part of chorion around gestational sac
chorion laeve
fetal surface of the placenta
chorionic plate
maternal surface of the placenta
basal plate
functional endocrine units of the placenta
chorionic villi
battledore placenta
marginal insertion, 2cm from placenta edge
velamentous placenta
cord inserts into the membrane before entering placenta, when covering OS it is called vasa previa
implantation of placenta within the lower uterine segment
, placenta previa
the umbilical cord forms during the ____ week of gestation and is surrounded by mucoid connective
tissue called____
5 weeks
whartons jelly
insertion into the ventral abd wall is important because scrutiny of the area can reveal defects such as
omphalocele
gastroschisis
limb body wall complex
normal umbilical has ____ vein and ____ artery
1 vein
2 arteries
when does the UB form and sono appearance
early as eight weeks
homogenous, mid level gray, smooth borders
thickness varies with gestational age, but is usually ___ cm in fetuses less than 23 weeks
2-3 cm
the placenta should not be greater than
4cm in thickness
cystic structures are ___ and are observed coursing behind ___ and ___ layers
vessels
coursing behind chorionic plate and between amnion and chorion layers
placenta lake
sonolucencies
normal finding
may change shape
blood flow usually not seen
shows slow swirling flow
how do we evaluate placental location
-long side to side
-trv from inferior-superior
check cord insertion
inferior edge to evaluate relationship to cervical os
when evaluting the placenta, what should we have our patient do
