A nurse is preparing to administer mannitol via continuous IV infusion to a client.
Which of the following findings should the nurse identify as an expected outcome of this medication therapy?
Improved urinary output.
Resolution of diabetic ketoacidosis.
Decreased brain natriuretic peptide levels.
Increased intraocular pressure.
The Correct Answer is A
Choice A rationale
Mannitol is an osmotic diuretic that increases the osmolality of the glomerular filtrate, thereby inhibiting water reabsorption in the renal tubules. This osmotic effect leads to increased water excretion and subsequently an improved urinary output. This enhanced diuresis is a primary therapeutic goal, particularly in conditions like cerebral edema or acute renal failure.
Choice B rationale
Mannitol is not indicated for the resolution of diabetic ketoacidosis. Diabetic ketoacidosis is a metabolic emergency characterized by hyperglycemia, ketonemia, and acidosis, requiring insulin therapy, fluid resuscitation, and electrolyte management. Mannitol does not address the underlying pathophysiology of insulin deficiency.
Choice C rationale
Mannitol's mechanism of action does not directly decrease brain natriuretic peptide (BNP) levels. BNP is a hormone released by cardiomyocytes in response to ventricular stretch and is a marker of heart failure. While mannitol can reduce fluid overload, which might indirectly impact cardiac preload, its direct effect is not on BNP secretion.
Choice D rationale
Mannitol is used to decrease, not increase, intraocular pressure. Its osmotic properties draw fluid from the extravascular space, including the vitreous humor of the eye, into the vascular compartment. This reduction in fluid volume within the eye lowers intraocular pressure, making it useful in treating acute angle-closure glaucoma.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale
Documenting the client's refusal and the stated reason in the nurses' notes is crucial for legal and ethical reasons. It provides a clear record of the event, ensures continuity of care by informing other healthcare providers, and allows for follow-up interventions to address the client's concerns or alternative medication strategies. It upholds the client's right to refuse treatment.
Choice B rationale
Delegating medication administration to an assistive personnel (AP) is inappropriate as medication administration is a complex nursing function requiring assessment, judgment, and patient education, which are outside the scope of practice for an AP. An AP's role is typically limited to basic care activities, and they are not trained or authorized to administer medications.
Choice C rationale
Notifying the pharmacist is not the immediate or primary action when a client refuses medication. While the pharmacist may offer insights into alternative formulations or administration routes, the nurse's initial responsibility is to understand the client's refusal, document it, and then notify the prescribing provider for a revised plan of care.
Choice D rationale
Mixing medication in juice without the client's explicit consent is considered a breach of the client's autonomy and can be construed as coercive or deceptive. It violates the client's right to self-determination and informed consent regarding their treatment. Medications should only be administered with the client's knowledge and cooperation.
Correct Answer is A
Explanation
Choice A rationale
Ipratropium is an anticholinergic bronchodilator that blocks muscarinic receptors in the bronchial smooth muscle, leading to bronchodilation. A common adverse effect of anticholinergic medications is reduced salivary gland secretion, resulting in xerostomia, or dry mouth, due to inhibition of parasympathetic stimulation.
Choice B rationale
Periorbital edema is not a typical adverse effect of ipratropium. This medication primarily targets muscarinic receptors in the respiratory tract. Edema, particularly around the eyes, is more commonly associated with allergic reactions or fluid retention from other medications.
Choice C rationale
Ipratropium, being an anticholinergic, primarily acts on M3 receptors in the lungs and has minimal systemic absorption, thus rarely causing bradycardia. In fact, anticholinergics can sometimes cause a mild increase in heart rate due to blockade of M2 receptors in the heart, but clinically significant changes are uncommon.
Choice D rationale
While xerostomia can contribute to dental issues over time due to reduced saliva's protective effects, dental caries is not a direct, acute adverse effect of ipratropium itself. It is a potential long-term complication of prolonged dry mouth, rather than a direct drug-induced effect to monitor immediately.
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