A nurse is teaching a client who is at 18 weeks of gestation and is to undergo an amniocentesis. The nurse should explain that the purpose of this test is to identify which of the following? (Select all that apply.)
"Gender of the fetus"
"Anomalies in fetal chromosomes"
"Rh incompatibility"
"Cephalopelvic disproportion"
"Neural tube defects"
Correct Answer : B,E
Choice A: Amniocentesis is not primarily performed to determine the gender of the fetus. The main indication for this procedure is to detect genetic abnormalities or chromosomal disorders.
Choice B: The primary purpose of an amniocentesis is to detect chromosomal abnormalities such as Down syndrome (trisomy 21), trisomy 18, and trisomy 13, among others.
Choice C: Rh incompatibility is assessed through blood tests, not amniocentesis. It involves determining the Rh factor of the mother's blood and monitoring for potential Rh sensitization.
Choice D: Cephalopelvic disproportion refers to a situation where the baby's head is too large or the mother's pelvis is too small to allow for a vaginal delivery. It is not related to amniocentesis.
Choice E: While detecting neural tube defects can be done through amniocentesis, it is not the primary indication for the procedure. Neural tube defects can also be screened for through blood tests and ultrasound examinations. Amniocentesis is more commonly used for chromosomal analysis.
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Related Questions
Correct Answer is A
Explanation
A: Quickening, which refers to the sensation of the baby moving in the womb, is considered a presumptive sign of pregnancy. It is called "presumptive" because it is subjective and can be attributed to other causes, such as gas or gastrointestinal movements.
B: Positive signs of pregnancy are those that are attributed only to the presence of a fetus, such as fetal heartbeat or visualization on ultrasound. Feeling the baby move (quickening) is not specific enough to confirm pregnancy on its own.
C: Probable signs of pregnancy are more objective and can be detected by a healthcare provider, such as a positive pregnancy test or ballottement (rebounding of the fetus against the examiner's fingers). Feeling the baby move is not a probable sign as it is subjective and can be attributed to other factors.
D: "Potential sign of pregnancy" is not a recognized classification in pregnancy signs.
Correct Answer is B
Explanation
Choice A: An ultrasound can indeed determine the number of fetuses if a client is carrying multiples, but this is not the primary reason for performing an ultrasound before amniocentesis.
Choice B: An ultrasound is typically done before an amniocentesis to visualize the location of the placenta and fetus. This information is important to ensure that the amniocentesis needle is safely inserted away from the placenta and the fetus.
Choice C: The primary purpose of an amniocentesis is to obtain a sample of amniotic fluid to screen for genetic conditions, not specifically for spina bifida.
Choice D: Fetal age can be estimated through an ultrasound, but this is not the primary reason for performing an ultrasound before an amniocentesis. The main goal of the procedure is to obtain a sample of amniotic fluid for genetic testing.
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