Pop Quiz #5 Flashcards
A femur length measurement is 2 wks less than dates in the 3rd trimester. What other steps might a sonographer take to determine of this is a significant finding?
- Measure other long bones to rule out skeletal dysplasias
- Assess the FL/BPD ratio
- Confirm the measurement w/ a linear array transducer
- All of the above
All of the above
The fetal lungs appear homogenous and slightly more echogenic than the liver
True
False
True
The posterior fossa is imaged to include all of the following except: Cerebral peduncles Cisterna magna Cavum septum pellucidum Cerebellar hemispheres
Cavum septum pellucidum
All of the following are indications for genetic testing in pregnancy except:
- Elevated MS-AFP
- Hx of prior pregnancy w/ chromosomal anomally
- AMA
- Decreased MS-AFP
- None of the above
None of the above
All of the following statements about the fetal spine are true exept:
- The spine should be imaged in the sagittal plane only
- The neural tube develops through the process of nerualation, closing the caudal and cephalic ends last
- It’s important to image the soft tissue of the dorsal spine, as well as the bony formation
- Widening of the proximal cervical spine and tapering of the distal sacral spine are normal sonographic features in the fetus
The spine should be imaged in the sagittal plane only
What neck mass is lymphatic in origin? Cystic hygroma Nuchal thickening Thyroglossal duct cyst Epignathus
Cystic hygroma
If placental tissue encroaches the internal os, it's called: Placenta previa Placenta increta Marginal placenta previa Placental abruption
Marginal placenta previa
The chorionic membrane is derived from what component of the conceptus? Decidua capsularis Trophoblast Chorionic villi Decidua basalis
Trophoblast
The sonographer measures an AFI of 24 cm at 25 wks gestation. This may be associated w/ all of the following except: Esophageal atresia Spina bifida Preeclampsia Twin-twin transfusion syndrome Thanatophoric dysplasia
Preeclampsia
Which of the following isn’t a clinical symptom of placental abruption?
- Painful, spastic uterus
- Hypoechoic retroplacental mass
- Vaginal bleeding
- Signs of shock
Hypoechoic retroplacental mass
The fetal urinary bladder not observed at the beginning of the obstetrical sonogram. The sonographer should:
- Consider a diagnosis of bilateral renal agenesis
- Search carefully for associated cardiac anomalies
- Continue w/ the rest of the exam, and re-check for bladder filling after 20-30 minutes
- Try a higher frequency transducer for better image resolution
Continue w/ the rest of the exam, and re-check for bladder filling after 20-30 minutes
All of the following are causes of large for dates except:
- erroneous menstrual hx
- intrauterine growth retardation
- multiple gestations
- molar pregnancy
- polyhydramnios
intrauterine growth retardation
Cyclopia refers to:
- A soft tissue protrusion from the forehead
- Extra digits
- A skull deformity w/ a prominent forehead
- A single bony orbit
A single bony orbit
Sonolucent areas are seen sonographically at the placental-myometrial interface. This finding most likely represents:
- Normal myometrial vessels
- Submembranous bleeding
- Retroplacental hematoma
- Areas of placental infarct
Normal myometrial vessels
The ductus arteriosus allows passage of blood from the pulmonary artery to the: Lt atrium Pulmonary vein Aortic arch Superior vena cava
Aortic arch
Placement of the ellipse for a HC measurement should not include which of the following?
- Anterior and posterior areas of echo drop-out due to refractive shadowing
- cranial echoes
- Scalp echoes
- edematous skin thickening
- more than one of the above
more than one of the above
Which structure in the fetal retroperitoneum might be confused for a normal kidney? Spleen Psoas muscle Descending colon Adrenal gland Undescended testis
Adrenal gland
Which of the following is the least accurate sonographic measurement for determining gestational age? BPD HC AC CRL FL
AC
A fetus is suspected to have IUGR at 26 weeks. Which measurement is prudent for determining gestational age in this case? Clavicular length Transcerebellar diameter Fool length AC
Transcerebellar diameter
Which of the following statements regarding diaphragmatic hernias isn’t true?
- Most diaphragmatic hernias occur on the right side
- A differential diagnosis for a fluid-filled mass in the lung is CCAM type I
- Severe diaphragmatic hernias include bowel and even liver
- There is associated polyhydramnios w/ a diaphragmatic hernia
Most diaphragmatic hernias occur on the right side
Which of the following isn't part of the fetal anatomy that should be seen when obtaining an image for an AC measurement? Fluid filled stomach Portal vein Rt adrenal gland Umbilical cord insertion
Umbilical cord insertion
The apex of the heart is oriented toward the rt anterior chest wall.
True
False
False
In which of the following situations might the BPD be inaccurate for dating?
- Late in the 3rd trimester
- When the fetal head is low in the maternal pelvis and difficult to see
- When the cephalic index is 69%
- All of the above
All of the above
Asymmetrical growth restriction, also known as “head-sparing” IUGR, is:
- Seen in the late 2nd and 3rd trimester
- Less common than symmetrical IUGR
- Characterized by a disproportionately small BPD
- Likely to have a normal HC/AC ratio
Seen in the late 2nd and 3rd trimester
The biophysical profile scoring includes all of the following except: Umbilical artery Doppler Fetal breathing Fetal tone Amniotic fluid assessment
Umbilical artery Doppler
