What should a nurse know about the contraction stress test (CST) when providing care for the antepartum woman?
It sometimes uses vibroacoustic stimulation.
It is considered negative if no late decelerations are observed with the contractions.
It is an invasive test; however, contractions are stimulated.
It is more effective than nonstress test (NST) if the membranes have already been ruptured.
It is more effective than nonstress test (NST) if the membranes have already been ruptured.
The Correct Answer is B
Choice A reason: Vibroacoustic stimulation is a technique that uses sound to stimulate the fetus and elicit a response. It is sometimes used in conjunction with the nonstress test (NST), not the CST. The NST measures the fetal heart rate (FHR) in response to fetal movement, while the CST measures the FHR in response to uterine contractions.
Choice B reason: A negative CST result means that the FHR does not show any late decelerations during at least three contractions in a 10-minute period. Late decelerations are decreases in the FHR that begin after the peak of a contraction and return to the baseline after the contraction ends. They indicate uteroplacental insufficiency, which means that the placenta is not delivering enough oxygen and nutrients to the fetus. A negative CST result is reassuring and suggests that the fetus is well-oxygenated and can tolerate labor².
Choice C reason: The CST is not an invasive test, as it does not involve inserting any instruments or devices into the uterus or the fetus. However, it does require stimulating contractions, either by giving the pregnant woman oxytocin (a hormone that causes uterine contractions) or by having her rub her nipples (which also releases oxytocin). The contractions can be uncomfortable and may trigger preterm labor in some cases.
Choice D reason: The CST is not more effective than the NST if the membranes have already been ruptured. In fact, the CST is contraindicated (not recommended) in women who have ruptured membranes, as it can increase the risk of infection and bleeding. The NST is a safer and simpler alternative to the CST, as it does not require stimulating contractions. However, the NST may not be as reliable as the CST in detecting fetal compromise.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A reason: Further testing will not be performed to determine the meaning of this score, as the biophysical profile score is a reliable indicator of fetal well-being. It is a combination of five parameters: fetal breathing movements, fetal movements, fetal tone, amniotic fluid volume, and fetal heart rate. Each parameter is scored as 0 (abnormal) or 2 (normal), and the total score ranges from 0 to 10.
Choice B reason: The test results are within normal limits, as a biophysical profile score of 8 or higher indicates a healthy fetus with a low risk of hypoxia or acidosis. It also suggests that the placenta is functioning adequately and the pregnancy can continue safely.
Choice C reason: An obstetric specialist will not evaluate the results of this profile and, within the next week, will inform you of your options regarding delivery, as the biophysical profile score is interpreted by the nurse or the health care provider who performed the test. It is not a diagnostic test that requires a consultation with a specialist.
Choice D reason: Immediate delivery by cesarean birth is not being considered, as the biophysical profile score of 8 does not indicate any fetal distress or complication that would warrant an urgent intervention. Cesarean birth may be indicated for other reasons, such as malpresentation, placenta previa, or failure to progress in labor.
Correct Answer is C
Explanation
Choice A reason: This is incorrect because a donor embryo is not used in IVF-ET. A donor embryo is an embryo that was created from another couple's gametes and donated to an infertile couple. IVF-ET uses the couple's own gametes to create an embryo.
Choice B reason: This is incorrect because it is dismissive and unprofessional. The nurse should respect the husband's curiosity and provide accurate and clear information about the procedure. The nurse should also address any concerns or questions that the couple may have.
Choice C reason: This is correct because it is a concise and accurate description of the IVF-ET procedure. The nurse explains the main steps and the purpose of the procedure in simple terms.
Choice D reason: This is incorrect because donor sperm is not used in IVF-ET. Donor sperm is sperm that was obtained from another man and donated to an infertile couple. IVF-ET uses the husband's own sperm to fertilize the wife's eggs.
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