OB test 2 quizzes

Please describe the landmarks that should be included for a BPD measurement. Please include how and where the calipers are placed.

-falx -paired thalamus -3rd ventricle -CSP - cavum septum pellucidum how and where - The measurements are places from the outside of the skull to the opposite inside of the skull. Skin is not included in the measurement. -measurement is a normal caliper straight line -can be taken from 11- 40 weeks but is most accurate at 17-16 weeks with a +/- 11 day difference or a +/- 3 weeks in the 3rd trimester. -BPD should be parallel to sound beam so fetus head would be perpendicular to should beam

A 20 week fetus has a right renal pelvis AP diameter of 12 mm, and the left renal pelvis measures 4 mm. This finding suggests:

unilateral renal obstruction

LV is abnormal past

10 mm

During what range must the fetal bladder be seen in a normal pregnancy?

12-13 weeks

Normal fetal heart rate is approximately:

120-160

when do cranial bones ossify

12th week

When is AC performed

14-40 weeks

When is nuchal fold measured?

15-21 weeks

What is the MSD when ultrasound should be able to see the embryo and heart beat?

16 mm

How many vessels should be present in a normal cord?

3

Which of the following cardiac views is the most superior view?

3 VV

at what position should the spine be for a measuring the AC of a fetus

3 or 9 o clock

what is an abnormal NF measurement

5-6

Which of the following 3 structures are visualized in a normal RVOT? (select 3)

ascending aorta pulmonary valve right ventricle

CM is filled with

CSF

Which of the following anatomic structures is NOT considered a component of the standard second trimester examination? fetal cord insertion stomach urinary bladder gallbladder kidneys

GB

kidney fluid is abnormal at

Greater than 5 mm before 20 weeksGreater than 8 mm between 20-30 weeksGreater than 10 mm after 30 weeks

What items in the list below are NOT used fordetermining fetal age?

NF, radius, LV

Which of the following 3 structures are found in the 3 vessel view? (select 3).

SVC ascending AO pulmonary artery

At what level should the fetal cord insertion be taken at?

above fetal bladder

In fetal circualation, where does the blood go after leaving the left ventricle?

ascending AO

what does a CI of 90 indicate

brachy cephaly

head long in BPD short in AP

brachycephaly

How is the fetus positioned if it is in a frank breech presentation?

buttocks first with both hips flexed and knees extended

Which fetal shunt directs blood from the right to the left atrium?

foramen ovale

Sonographic observation of the fetal head in the thalamic view will reveal which landmarks?

cavum septi pellucidi, thalami, and falx cerebri

Which portion of the spine shows a normal widening?

cervical

Which of the following is NOT a sonographic observation that can be made in the 4 chamber view of the fetal heart? cardiac axis chamber symmetry criss-crossing of outflow tracts septal continuity

criss-crossing of outflow tracts

which valve is lower

tricuspid

which arm bone is longer

ulna

Which vessel carries oxygen rich blood to the fetal liver?

umbilical vein

which is low CI

dolicho

head short in BPD long in AP

dolichocephaly

Which fetal shunt directs blood from the liver to the IVC?

ductus venosus

Which extremity is commonly measured to assist with determining fetal age and growth?

femur

fetal presentation

fetal part closest to cervix

what is an abnormal lateral ventricle measurement

greater than 10 mm

Which of the following is NOT one of four standard biometric measurements used in the calculation formula for estimated fetal weight? humeral length biparietal diameter femoral length head circumference abdominal circumference

humeral length

Which of the following best describes the sonographic appearance and location of the choroid plexus?

hyper echoic structure within the lateral ventricles

Which of the following 3 structures are visualized in a normal LVOT? (select 3) pulmonary valve superior vena cava interventricular septum descending aorta mitral valve left ventricle

interventricular septum mitral valve left ventricle

What organ is required to be visualized when measuring the abdominal circumference?

liver

When the fetal long axis is parallel to the maternal long axis, what fetal lie is present?

longitudinal

Which of the following three items are part of the sonographic protocol for nuchal transluceny measurements? (select 3)

measure inner to inner fetal profile magnified image 11-15 weeks

Which of the following 3 structures are visualized in a normal LVOT? (select 3)

mitral valve L ventricle interventricular septum

Which of the following is NOT a 2nd trimester sonographic observation when evaluating the fetal profile? nuchal fold thickness presence of a nasal bone presence of a chin shape of the forehead

nuchal fold thickness

describe footling breech position

one or both hips/ knees extended

choroid plexus function

produces CSF

Which of the following 3 structures are visualized in a normal RVOT? (select 3) pulmonary valve ascending aorta right ventricle descending aorta mitral valve

pulmonary valve ascending aorta right ventricle

What structure would provide a good landmark for the transverse thoracic spine?

ribs

Which structure should NOT be included in a HC mesurement?

skin

Which of the following structures should be routinely seen by 16 weeks?

stomach

landmarks for the AC

stomach liver GB where umbilical vein meets left portal vein, symmentrical ribs, spine in 3 or 9

Which scanning plane is used to evaluate for a cleft lip?

tangential

fetal lie refers to

the long axis of fetus compared to the long axis of the uterus

Which bone of the lower leg is normally larger?

tibia

which leg bone is longer

tibia

While scanning a 20 week gestation, with the transducer orientated transversely on the maternal uterus, it is noted that the fetal spine is displayed longitudinally. What is the fetal lie in this pregnancy?

transverse

Please indicate the significance of taking the sonographic image of the diaphgram. Why do we take it? What should be demonstrated in the image? Where in the fetal body should it be taken?

we take this image to prove there are no disruptions in the diaphagm which could indicate a hernia or if the disphragm looks displaced there could be a large mass in the thorax -this should be a coronal image so you know you are seeing the whole diaphragm compared to just a sagittal image that could miss a lot of information -this should be taken to include some thorax and some abdomenheart above diaphragm and stomach below; hypoechoic line separating the two cavities