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EXAM 2 STUDY PREP
Obstetrics
| Question | Answer |
|---|---|
| Which plane should the measurements of the fetal orbits be obtained? | In a plane sligthly caudal to the BPD |
| What is the term used in describing the shape of the cranium where the frontal bones collapse forward? | Lemon Sign |
| All long bones should be measured if the difference between the femur length and all other biometric parameters is? | 2 weeks or greater |
| Which alternative fetal measurement can best predict gestation age? | Binocular Distance |
| The abdominal circumference (AC) is the? | Measurement at the level of the stomach, left portal vein, and left umbilical vein |
| The condition in which the orbits are spaced far apart is known as? | Hypertelorism |
| What are the landmarks used in determining the correct placement of calipers in obtaining the biparietal diameter? | Thalamus and cavum septum pellucidum |
| Where on the parietal bones should the calipers be placed in measuring the cranium for obtaining a BPD? | Outer edge to inner edge |
| Which fetal measurement is about as accurate as the biparietal diameter in determining gestational age? | Femur length |
| An abnormality in the number of chromosomes is called? | Aneuploidy |
| Which of the following is a common reason amniocentesis is performed? | Advanced maternal age |
| What is a common reason for elevation in maternal serum AFP (MSAFP)? | Incorrect dates |
| An early noninvasive means of assessing the risk of aneuploidy is? | Nuchal translucency |
| A large cystic hygroma, hydrops, and coarctation of the aorta may be seen in a fetus with? | Turner Syndrome |
| Which is the greatest advantage of chorion villus sampling (CVS) versus other methods to assess fetal karyotype? | Can be performed earlier in pregnancy |
| Which test can produce karyotype results within 2 to 3 days? | Cordocentesis |
| Amniotic fluid AFP ? with fetal age. | Decreases |
| The sonographic findings of cranial anomalies, choroid plexus cysts, facial anomalies, and rocker bottom feet may be found in? | Trisomy 18 |
| Which of the following does the quadruple screen not assess? | Fetal Lung Maturity |
| The acronym TORCH stands for which of the following? | Toxoplasmosis, Other transplacental Infections, Rubella, Cytomegalovirus, Herpesvirus |
| One of the most common, possibly the most common, aneuploid condition is? | Trisomy 21 |
| Trisomy 18 is also known as? | Edward's Syndrome |
| What is the normal measurement for a nuchal translucency? | <3mm |
| What is also a measurement that relates to the back of the neck that has a measurement of <5mm? | Nuchal Fold |
| What is a cystic hygroma? | Lymphatic fluid that is often associated with turner syndrome |
| Are there measurements for the cerebellum? | No, the cerebellum grows with the baby |
| What's the measurement for the cisterna magna? | <10mm |
| True or False: Higher than normal or lower than normal MSAFP levels can indicate potential fetal anomalies. | True |
| What is the main cause of asymmetric IUGR? | Placental Insufficiency |
| What are some causes for placental insufficiency? | Diabetes and hypertension |
| What is asymmetric IUGR | head/brain sparing. head is measuring up to date but abdominal measurements are very SGA |
| What is symmetric IUGR typically caused by? | Some first trimester insults, chromosomal anomalies, and exposure to certain infection in 1st trimester, TORCH |
| Is asymmetric or symmetric IUGR more common? | assymetric IUGR |
| What condition do we see an impact in RH isoimmunization? | Hydrops |
| How many parameters are evaluated during a biophysical profile? | 5 |
| How are the biophysical profiles scored? | 0 or 2 (no 1) MAX: 10 points |
| What are the biophysical parameters? | Fetal breathing movements, fetal tone, gross body movements, NST, and AFI |
| Fetus should score at least a what in a biophysical profile? | at least 6 or above |
| What is the primary fuel for fetal growth in utero? | Glucose |
| Preterm labor is the onset of labor between how many weeks of gestation? | 37 |
| What medication is administered to prevent RH isoimmunization? | RhoGAM |
| Is the first pregnancy affected by RH isoimmunization? | No |
| Amniotic fluid AFP levels should ? With fetal age. | Decrease |
| Maternal fluid AFP levels should ? With fetal age. | Increase |
| Which of the following is a common sonographic finding with Trisomy 18? | Micognathia |
| What’s a common finding with trisomy 13? | Holoprosencephaly |
| What is the karyotype for a fetus with Turners Syndrome? | 45, XO |
| Hypertensive pregnancies are associated with ? Placentas. | Small |
| What can cause the placenta to be large? | Diabetes |
| The most frequent causes of nonimmune hydrops are ? Lesions. | Cardiac |
| NIPT is combined with ? For additional accuracy for fetal aneuploidy. | Nuchal translucency |
| What kind of flow do we want to see in the umbilical artery? | Constant forward flow |