The practical nurse (PN) is preparing to administer a maintenance dose of an antihypertensive medication to an adult client and notes that the client’s blood pressure is 120/72 mm Hg. Which action should the PN take?
Confer with the charge nurse about the need to administer the medication
Advise the client to call the PN for symptoms of increasing blood pressure
Withhold the medication and recheck the client’s blood pressure in one hour
Administer the scheduled dose of the antihypertensive medication
The Correct Answer is D
Choice A reason: Conferring with the charge nurse is unnecessary, as a blood pressure of 120/72 mm Hg is within normal range for a client on maintenance antihypertensive therapy. Maintenance doses prevent hypertension recurrence, and this reading does not indicate a need to alter the schedule.
Choice B reason: Advising the client to report rising blood pressure symptoms is general education, not an action addressing the current situation. The blood pressure is normal, and the maintenance dose is indicated to sustain control, making this choice irrelevant for immediate action.
Choice C reason: Withholding the medication and rechecking in an hour risks blood pressure spikes, as maintenance therapy prevents hypertension. A normal reading of 120/72 mm Hg indicates effective control, and stopping the dose could destabilize the client’s condition, making this choice inappropriate.
Choice D reason: Administering the scheduled antihypertensive dose is correct, as 120/72 mm Hg indicates effective blood pressure control. Maintenance therapy sustains normotension by regulating vascular tone or fluid balance, preventing hypertensive episodes, ensuring cardiovascular stability, and aligning with the prescription’s intent.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A reason: Ankle circumference monitors edema, which mannitol reduces by drawing fluid from tissues. However, this is secondary to urinary output, as mannitol’s primary action is diuresis, increasing urine production to reduce intracranial or intraocular pressure, making edema measurement less critical.
Choice B reason: Heart rate is relevant for overall monitoring but not the primary outcome for mannitol, which acts as an osmotic diuretic. Cardiovascular effects are secondary, and mannitol’s efficacy is better assessed by urine output, which directly reflects its diuretic mechanism.
Choice C reason: Dietary intake is unrelated to mannitol’s therapeutic effect. Mannitol pulls fluid into the bloodstream, increasing urine output, not influenced by diet. Monitoring intake may be relevant for other conditions, but it is not critical for assessing mannitol’s diuretic action.
Choice D reason: Urinary output is the most important outcome, as mannitol, an osmotic diuretic, increases urine production by drawing fluid into the renal tubules, reducing intracranial or intraocular pressure. Adequate output (e.g., >30 mL/hour) confirms efficacy, preventing fluid overload or renal complications.
Correct Answer is B
Explanation
Choice A reason: Serum lithium levels indicate compliance but do not directly explain the need for frequent monitoring. Lithium’s therapeutic effect stabilizes mood, but monitoring is primarily due to its narrow therapeutic index, where small changes in blood levels can cause toxicity, not just behavioral changes or compliance.
Choice B reason: Sodium levels affect lithium excretion, as both compete for renal reabsorption. Low sodium increases lithium retention, risking toxicity, while high sodium increases excretion, reducing efficacy. Lithium’s narrow therapeutic range (0.6–1.2 mEq/L) necessitates frequent monitoring to prevent toxic levels, which can cause neurological or cardiac issues.
Choice C reason: Myelosuppression and agranulocytosis are not common lithium side effects. Lithium may cause mild leukocytosis, not suppression. Toxicity risks, like neurological or renal effects, drive monitoring needs, not hematologic issues. This choice is incorrect, as it misrepresents lithium’s side effect profile.
Choice D reason: Tyramine, relevant to monoamine oxidase inhibitors, does not influence lithium metabolism. Lithium’s pharmacokinetics are affected by sodium and renal function, not dietary tyramine. This choice is incorrect, as it falsely links a dietary factor to lithium’s monitoring requirements.
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