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 B
Explanation
Choice A reason: Intranasal spray is not a correct option, as urofollitropin is not available in this form. Intranasal spray is a method of delivering some medications through the nose, where they can be absorbed by the mucous membranes. However, urofollitropin is a protein hormone that would be degraded by the enzymes in the nasal cavity and would not reach the bloodstream effectively.
Choice B reason: Intramuscular injection is the correct option, as urofollitropin is available in this form. Intramuscular injection is a method of delivering medications into the muscle tissue, where they can be absorbed by the blood vessels. Urofollitropin is a protein hormone that needs to be injected into the body to bypass the digestive system and avoid being broken down by the stomach acids and enzymes. Urofollitropin is usually injected into the thigh or buttock muscles once a day for several days, depending on the dosage and the response².
Choice C reason: Vaginal suppository is not a correct option, as urofollitropin is not available in this form. Vaginal suppository is a method of delivering medications into the vagina, where they can be absorbed by the vaginal walls or act locally. Urofollitropin is a protein hormone that would not be absorbed well by the vaginal mucosa and would not reach the ovaries, where it is supposed to stimulate the development of the follicles (eggs).
Choice D reason: Tablet is not a correct option, as urofollitropin is not available in this form. Tablet is a method of delivering medications orally, where they can be swallowed and absorbed by the gastrointestinal tract. Urofollitropin is a protein hormone that would be destroyed by the stomach acids and enzymes and would not reach the bloodstream or the ovaries.
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