For which of the following clients should a nurse implement seizure precautions on an antepartum unit?

Choice A reason: Mitral valve stenosis at 28 weeks increases cardiac workload, risking heart failure or arrhythmias due to increased blood volume in pregnancy. However, it does not directly cause seizures. Seizure risk is linked to neurological or hypertensive conditions, not cardiac valvular issues, which primarily affect hemodynamic stability and not seizure thresholds. Choice B reason: A positive Kleihauer-Betke test at 32 weeks indicates fetal-maternal hemorrhage, requiring Rho(D) immune globulin to prevent isoimmunization. It does not increase seizure risk, as it affects blood compatibility, not neurological stability. Seizures are unrelated to this hematological issue, which primarily impacts future pregnancies rather than maternal neurological function. Choice C reason: Cystic fibrosis at 30 weeks affects respiratory and pancreatic function, leading to infections or malabsorption, but not seizures. Seizure risk requires neurological or hypertensive triggers, not pulmonary or metabolic issues. The condition’s impact on maternal oxygenation does not directly alter seizure thresholds or neurological excitability in pregnancy. Choice D reason: Severe chronic hypertension at 36 weeks increases seizure risk due to preeclampsia or eclampsia, where elevated blood pressure disrupts cerebral autoregulation, causing neuronal irritability. Seizure precautions are critical, as hypertension-induced endothelial damage and cerebral edema can trigger convulsions, threatening maternal and fetal safety, necessitating magnesium sulfate prophylaxis.