A nurse is preparing to administer magnesium sulfate IV to a client who is experiencing preterm labor.Which of the following is the priority nursing assessment for this client?

Choice A rationaleWhile fetal heart rate (FHR) is a crucial assessment in preterm labor, especially when considering the effects of medications, it is not the immediate priority assessment before initiating magnesium sulfate. Magnesium sulfate primarily affects the mother's central nervous system and neuromuscular system.Choice B rationaleRespiratory rate is the priority nursing assessment before administering magnesium sulfate. Magnesium sulfate is a central nervous system depressant and can cause respiratory depression, a potentially life-threatening side effect. Establishing a baseline respiratory rate and ensuring it is within the normal range (12-20 breaths per minute for adults) is critical before administering the medication.Choice C rationaleTemperature is an important vital sign to monitor, but it is not the priority assessment before administering magnesium sulfate. Magnesium sulfate does not typically have a direct impact on body temperature. Other assessments related to the medication's effects take precedence. Normal adult temperature range is typically 97.8°F to 99.1°F (36.5°C to 37.3°C).Choice D rationaleBowel sounds are an assessment related to gastrointestinal function and are not the priority assessment before administering magnesium sulfate. While magnesium sulfate can have some effects on smooth muscle, including the intestines, the immediate risk of respiratory depression necessitates prioritizing respiratory assessment. Normal bowel sounds are typically described as normoactive, with clicks and gurgles occurring irregularly.