A client has received MSAFP test result.
The client is requesting additional testing to determine whether the fetus has a chromosomal abnormality.
Which of the following antenatal tests would the nurse anticipate the provider will order?
Amniocentesis.
Nonstress Test.
Biophysical Profile.
Chorionic Villus Sampling.
The Correct Answer is A
Choice A rationale
Amniocentesis is a diagnostic test that involves extracting a small amount of amniotic fluid from the uterus to test for chromosomal abnormalities and genetic disorders. It is typically performed between 15 and 20 weeks of pregnancy. The fluid contains fetal cells and various chemicals produced by the baby, which can be analyzed to detect conditions such as Down syndrome, trisomy 18, and neural tube defects. This test is highly accurate and is often recommended when screening tests like the MSAFP indicate a potential issue.
Choice B rationale
A Nonstress Test (NST) is a non-invasive test that measures the fetal heart rate in response to its movements. It is used to assess fetal well-being, particularly in the third trimester, but it does not provide information about chromosomal abnormalities. The NST is typically used to monitor high-risk pregnancies and to ensure that the fetus is receiving enough oxygen.
Choice C rationale
A Biophysical Profile (BPP) combines an ultrasound with a Nonstress Test to evaluate the fetus’s health. It assesses fetal breathing movements, body movements, muscle tone, amniotic fluid volume, and heart rate reactivity. While it provides a comprehensive assessment of fetal well-being, it does not specifically diagnose chromosomal abnormalities. The BPP is often used in the third trimester to monitor high-risk pregnancies.
Choice D rationale
Chorionic Villus Sampling (CVS) is another diagnostic test that can detect chromosomal abnormalities and genetic disorders. It involves taking a small sample of placental tissue (chorionic villi) for analysis. CVS is typically performed between 10 and 13 weeks of pregnancy, earlier than amniocentesis. While it provides similar diagnostic information, it is not the test of choice following an abnormal MSAFP result, which is usually conducted later in pregnancy.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice B rationale
Regular uterine contractions that cause cervical change are a definitive sign of true labor. True labor is characterized by contractions that become progressively stronger, more frequent, and more regular, leading to cervical dilation and effacement. This process indicates that the body is preparing for childbirth.
Choice A rationale
Uterine contractions that cause variable decelerations are not specific to true labor. Variable decelerations are typically associated with umbilical cord compression and can occur during both true and false labor.
Choice C rationale
The station of the presenting part refers to the position of the fetus in relation to the ischial spines of the pelvis. While it is an important aspect of labor progression, it is not a definitive sign of true labor.
Choice D rationale
Rupture of the membranes, or the breaking of the water, can occur before true labor begins. While it often indicates that labor is imminent, it is not a definitive sign of true labor on its own.
Correct Answer is A
Explanation
Choice A rationale
Monitoring the fetal heart rate is the next appropriate action. The fetal heart rate provides crucial information about the fetus’s well-being and can help identify any potential issues that may need further intervention.
Choice B rationale
Monitoring uterine contractions is important, but in this scenario, the client’s vital signs are stable, and there is no indication of labor. Therefore, monitoring the fetal heart rate takes precedence.
Choice C rationale
Amniotic fluid levels are important to monitor, but they are typically assessed through ultrasound rather than immediate bedside monitoring. The fetal heart rate provides more immediate information about the fetus’s condition.
Choice D rationale
Cervical dilation is relevant during labor, but there is no indication that the client is in labor based on the provided vital signs. Monitoring the fetal heart rate is more pertinent in this situation.
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