A nurse in a provider's office is caring for a client who is at 36 weeks of gestation and scheduled for an amniocentesis. The client asks why she is having an ultrasound prior to the procedure. Which of the following is an appropriate response by the nurse?
"This will determine if there is more than one fetus."
"It assists in identifying the location of the placenta and fetus."
"This is a screening tool for spina bifida."
"It is useful for estimating fetal age."
The Correct Answer is B
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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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A: Engagement of the presenting part occurs when the baby's head descends into the pelvis. While it is a sign of labor progression, it can also happen weeks before labor begins.
Choice B: Progressive changes in the effacement (thinning) and dilation (opening) of the cervix are the most reliable signs of true labor. As the cervix changes, it indicates that labor is actively occurring.
Choice C: Rupture of the membranes (water breaking) is another sign of labor, but it can happen before or during labor. It may not be the most reliable sign by itself.
Choice D: Regular and frequent contractions are essential for labor to progress, but an irregular pattern of contractions may still be associated with false labor or early labor.
Correct Answer is C
Explanation
The correct answer is: c. The cervix is 1 cm dilated.
Choice A reason:
The presenting part is 1 cm above the ischial spines. This statement would be documented as -1 station. Fetal station is measured in centimeters relative to the ischial spines, with negative numbers indicating the presenting part is above the spines.
Choice B reason:
The cervix is effaced 1 cm. Effacement is measured in percentages, not centimeters. It refers to the thinning of the cervix, which progresses from 0% (not effaced) to 100% (fully effaced).
Choice C reason:
The cervix is 1 cm dilated. This means the cervix has opened 1 cm, which is a common measurement during early labor. Cervical dilation ranges from 0 cm (closed) to 10 cm (fully dilated).
Choice D reason:
The presenting part is 1 cm below the ischial spines. This would be documented as +1 station. Positive numbers indicate the presenting part is below the ischial spines, moving towards delivery.
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