A nurse is reviewing the medical record of a client who has preeclampsia prior to administering labetalol.
For which of the following findings should the nurse withhold the medication?
Uric acid 7.5 mg/dL (2.7 to 7.3 mg/dL).
Heart rate 54/min.
FHR 112/min.
BUN 23 mg/dL (10 to 20 mg/dL).
The Correct Answer is B
Choice A rationale
Uric acid levels in preeclampsia can be elevated due to decreased renal clearance and increased production, often exceeding the normal range of 2.7 to 7.3 mg/dL. A value of 7.5 mg/dL is slightly elevated, which is a common finding in preeclampsia and does not typically contraindicate the administration of labetalol, an antihypertensive medication. It reflects disease progression but does not pose an immediate risk regarding medication administration.
Choice B rationale
Labetalol is a beta-blocker that reduces heart rate and blood pressure. A heart rate of 54/min is below the normal adult resting heart rate range (typically 60-100 beats/min) and indicates bradycardia. Administering labetalol to a client with pre-existing bradycardia could further depress the heart rate, potentially leading to symptomatic bradycardia, decreased cardiac output, and inadequate tissue perfusion, thus requiring the nurse to withhold the medication.
Choice C rationale
A fetal heart rate (FHR) of 112/min is within the normal range for a fetus (typically 110-160 beats/min). While labetalol can rarely cause fetal bradycardia, a baseline FHR of 112/min does not contraindicate its administration. The primary concern with labetalol in preeclampsia is the maternal hemodynamic response, and this FHR value does not indicate an immediate fetal distress that would preclude the medication.
Choice D rationale
A BUN level of 23 mg/dL is slightly elevated above the normal range of 10 to 20 mg/dL, often seen in preeclampsia due to impaired renal function. While this indicates renal involvement, it does not contraindicate the administration of labetalol. Labetalol is primarily metabolized by the liver, and while caution is advised in renal impairment, this BUN level alone does not warrant withholding the medication.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale
In the scenario of ruptured membranes with a breech presentation, there is an elevated risk of umbilical cord prolapse due to the disproportionate fit of the presenting part in the maternal pelvis. Checking fetal heart tones immediately allows for rapid detection of cord compression, which manifests as abrupt decelerations, indicating fetal distress and necessitating urgent intervention.
Choice B rationale
While a cesarean birth is often indicated for breech presentations, especially with ruptured membranes, it is not the immediate first action. The priority is to assess fetal well-being, specifically ruling out umbilical cord prolapse, as this is an acute emergency that requires immediate intervention to prevent fetal hypoxia and mortality, prior to surgical preparation.
Choice C rationale
Assessing the color, amount, and odor of the amniotic fluid provides information about potential infection or meconium presence, which are important data points. However, the immediate life-threatening complication with ruptured membranes and breech presentation is umbilical cord prolapse, making fetal heart tone assessment a more urgent priority.
Choice D rationale
Performing a Nitrazine test confirms the rupture of membranes, but the client has already reported "my water just broke.”. While a confirmatory test, it is not the immediate priority. The critical concern is the potential for umbilical cord prolapse, which directly impacts fetal oxygenation and requires immediate assessment via fetal heart tones.
Correct Answer is C
Explanation
Choice A rationale
Cooling the newborn's heel causes vasoconstriction, which reduces blood flow to the area. This would make it more difficult to obtain an adequate blood sample and could lead to repeated punctures, increasing the risk of discomfort and tissue damage for the newborn. Optimal blood flow is crucial for a successful heel stick.
Choice B rationale
Puncturing the center of the newborn's heel risks damaging the calcaneus bone, which can lead to osteomyelitis, an infection of the bone. The proper technique involves puncturing the lateral aspects of the heel to avoid bone injury and ensure patient safety.
Choice C rationale
Cleansing the puncture site with an alcohol gauze pad prior to the procedure is essential for asepsis. Alcohol acts as an antiseptic by denaturing proteins and dissolving lipids in bacterial cell membranes, effectively reducing the microbial load on the skin surface and minimizing the risk of introducing pathogens into the bloodstream during the puncture.
Choice D rationale
Administering vitamin K is typically done shortly after birth to prevent hemorrhagic disease of the newborn, as newborns have immature livers and insufficient gut flora for vitamin K synthesis. It is not routinely administered 30 minutes prior to every blood draw and is unrelated to the immediate procedure of obtaining a heel stick sample.
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