Test 1 Flashcards
The biparietal diameter can be measured after what week?
11 weeks
What anatomic feature is considered a landmark for the appropriate view to measure the abdominal circumference?
Left portal vein
What is the most accurate method to determine gestational age?
Crown-rump length measured at 8 weeks
Fetal lie refers to:
Long axis of the spine compared to long axis of moms spine
The term brachycephaly refers to
A round head
What is the echogenic, linear, midline structure routinely seen on sonograms of the cranial vault of a fetus?
Falx cerebri
What portion of the spine is imaged if the fetal kidneys are seen?
Lumbar
When does the volume of amniotic fluid peak?
33 Weeks
What measuring technique should be used when obtaining a biparietal diameter?
Outer edge to inner edge
Which group of measurements will calculate the estimated fetal weight?
BPD, HC, AC, FL
What is a major limitation to endovaginal sonography?
Smaller field of view
What does the OFD help you determine?
Cephalic index
What is producing human chorionic gonadotropin in the first trimester?
Trophoblastic cells
The yolk sac may be identified with ultrasound as early as:
5.5 Weeks
How often should hCG levels double during early pregnancy?
48 hrs
Ectopic pregnancies usually occur in which portion of the fallopian tube?
ampullary
Nuchal translucency screening is done during which gestational timeframe?
11-13 weeks
Where is the secondary yolk sac located?
Chorionic cavity
Fusion of the amnion and chorion is expected to occur around which gestational week?
14
You are scanning a retroflexed uterus transvaginally and you are at mid. Which direction do you angle the probe to find the cervix?
Ventral on the patient
True/False
When prepping your transvaginal probe for an exam you need to make sure that gel is inside the sheath as well as outside the sheath
True
True/False
Your next patient has a quantitative hCG of 475 mlU/ml. At this level you will see a gestational sac ad yolk sac.
False
True/False
To determine a persons delivery date one can use Naegals Rule. It is LMP+7 days, then subtract 4 months to find the delivery date.
False
Dolichocephaly
Refers to an elongated oval shaped head (stretched out)
What is head shape determined by?
Cephalic index formula
What is head shape determined by?
Cephalic index formula
The abdominal circumference can be measured after which week?
14
The femur length can be measured after which week?
13
Three landmarks that must be seen in thalamus view:
Cavum septum
Thalami
Fall cerebri
If you are scanning for thalamic view and see the orbits, eyes, or cerebellum, you’re too (blank)
Too low
If you are scanning for thalamic view and see the orbits, eyes, or cerebellum, you’re too (blank)
Too low
If you’re scanning for thalamic view and see the level of lateral ventricles or ventricular atrium, you’re too (blank)
Too high
Two reasons falciform Cerebri should be imaged horizontally
Easier to measure
The falx being a linear structure means that it’s better for it to be hit by the beam perpendicularly
