A nurse is teaching a client who is scheduled for an amniocentesis about the purpose of a lecithin/sphingomyelin ratio test.
Which of the following statements should the nurse make?
"This test will check your baby's lung maturity.”.
"This test will check your baby's blood type.”.
"This test will check your baby's liver development.”.
"This test will check your baby for genetic disorders.”.
The Correct Answer is A
Choice A rationale
The lecithin/sphingomyelin (L/S) ratio test is a crucial assessment of fetal lung maturity. Lecithin and sphingomyelin are phospholipids that are components of surfactant, a substance vital for reducing surface tension in the alveoli and preventing lung collapse at birth. A ratio of 2: or greater generally indicates adequate lung maturity.
Choice B rationale
The L/S ratio test does not assess the baby's blood type. Fetal blood typing is determined through other methods, such as cordocentesis or maternal blood tests for fetal DNA, if clinically indicated. The L/S ratio specifically evaluates the quantity and ratio of pulmonary surfactants.
Choice C rationale
This test does not check the baby's liver development. Fetal liver development is assessed through different parameters, such as ultrasound visualization of liver size, blood flow characteristics, and specific liver enzyme levels if a concern exists. The L/S ratio is solely focused on pulmonary maturity.
Choice D rationale
The L/S ratio test is not used to check for genetic disorders. Genetic disorders are identified through chromosomal analysis, DNA sequencing, or biochemical tests performed on amniotic fluid cells obtained during amniocentesis, or through chorionic villus sampling. The L/S ratio is a physiological marker of lung readiness.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale
Immediately bathing a newborn with herpes simplex virus is generally discouraged. While it might seem intuitive for infection control, vigorous bathing could theoretically disrupt skin integrity and potentially spread the virus to other areas of the body or mucous membranes, exacerbating the infection.
Choice B rationale
Initiating contact precautions is essential for a newborn with herpes simplex virus. This highly contagious viral infection requires strict measures to prevent transmission to other vulnerable neonates and healthcare providers. Contact precautions involve gown and glove use, limiting direct contact with the newborn or contaminated surfaces.
Choice C rationale
Administering ampicillin IV is not the appropriate treatment for herpes simplex virus. Ampicillin is an antibiotic effective against bacterial infections, not viral infections like herpes simplex. Antiviral medications, such as acyclovir, are the specific treatment for neonatal herpes simplex virus to inhibit viral replication.
Choice D rationale
Withholding breastfeeding is not typically indicated for a newborn with in utero transmitted herpes simplex virus unless the mother has active lesions on her breasts. The primary concern is direct skin-to-skin transmission if lesions are present. Breast milk itself provides beneficial antibodies and is not a route of transmission for in utero infection.
Correct Answer is A
Explanation
Choice A rationale
The primary goal of epidural analgesia is to provide effective pain relief while allowing the client to maintain some sensation, particularly pressure, which indicates the epidural is blocking nociceptive pain signals effectively without completely eliminating proprioceptive awareness. This selective blockade allows the client to feel contractions, facilitating pushing efforts, while minimizing pain perception by blocking transmission of pain impulses via spinal nerves.
Choice B rationale
Bladder distention is a common side effect of epidural analgesia, resulting from the blockade of parasympathetic nerve fibers innervating the bladder, which can impair the micturition reflex. While it indicates the epidural's systemic effect, it is an adverse effect requiring intervention, such as catheterization, rather than a direct indicator of effective pain management.
Choice C rationale
A decrease in systolic blood pressure by 20 mm Hg, or more, is a common adverse effect of epidural analgesia, caused by sympathetic blockade, leading to vasodilation and subsequent peripheral pooling of blood. While it demonstrates the systemic absorption and action of the anesthetic, it signifies a complication requiring management, not an indicator of effective pain relief for labor.
Choice D rationale
Inability to move legs or feet suggests a dense motor blockade, which can occur with epidural analgesia but is not the desired outcome for labor. While a degree of motor weakness may be present, complete motor paralysis can hinder effective pushing during the second stage of labor and is usually avoided to allow for maternal participation in the birth process.
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