A prescription reads phenytoin 0.2 g orally twice daily. The medication label states that each capsule is 100 mg. The nurse prepares how many capsule(s) to administer 1 dose?

Choice A reason: Continuing suctioning during decreased oxygen saturation and bradycardia worsens hypoxia, as suctioning removes oxygen from the airway. Administering 50% oxygen is insufficient to rapidly correct severe desaturation, making this action inappropriate compared to stopping suctioning and providing 100% oxygen.

Choice B reason: Discontinuing suctioning prevents further oxygen depletion, as suctioning removes air from the airway, exacerbating hypoxia. Administering 100% oxygen rapidly restores oxygen saturation, addressing bradycardia caused by hypoxemia. This aligns with critical care protocols, making it the best action.

Choice C reason: Preparing for resuscitation is premature unless the patient is unresponsive or in cardiac arrest. Decreased oxygen saturation and bradycardia can often be reversed by stopping suctioning and providing oxygen, making this action less immediate than addressing hypoxia directly.

Choice D reason: Continuing suctioning worsens hypoxia, and epinephrine is not indicated for bradycardia caused by suctioning-related hypoxemia. Epinephrine is used in cardiac arrest or allergic reactions, not routine suctioning complications, making this choice incorrect for the scenario.

Choice A reason: Hyperkalemia is not typical in bulimia nervosa. Frequent vomiting causes electrolyte loss, particularly potassium, leading to hypokalemia due to hydrogen ion exchange in the kidneys. Hyperkalemia is more associated with renal failure or other conditions, not bulimia’s vomiting-induced losses.

Choice B reason: Dental decay is expected in bulimia nervosa due to frequent self-induced vomiting, which exposes teeth to gastric acid, eroding enamel. This acid exposure, often high in hydrogen ions, demineralizes teeth, causing cavities and sensitivity, a hallmark physical consequence of bulimia’s purging behavior.

Choice C reason: Amenorrhea is more associated with anorexia nervosa, where severe weight loss disrupts hormonal balance, halting menstruation. Bulimia patients often maintain normal weight, so menstrual cycles are typically preserved, making amenorrhea an unlikely finding in this condition.

Choice D reason: Lower than normal body weight is characteristic of anorexia nervosa, not bulimia nervosa, where patients often maintain normal or slightly above-normal weight due to binge-purge cycles. Weight fluctuations occur, but significant underweight status is not typical, unlike in anorexia.