The nurse prepares to administer a 1,000 mg loading dose of phenytoin IV to a client with a subarachnoid hemorrhage.
Which consideration is most important when administering this dose?
Dilantin should be mixed in dextrose in water before administration.
Dilantin should be administered through an IV catheter in the client's hand.
Rapid Dilantin administration can cause cardiac dysrhythmias.
Therapeutic drug levels should be maintained between 20 to 30 mg/mL.
The Correct Answer is C
Administering phenytoin requires applying knowledge of intravenous drug compatibility and cardiovascular safety profiles. The nurse must prioritize monitoring for life-threatening complications associated with rapid infusion, specifically focusing on the drug's narrow therapeutic index and its significant irritant properties.
Choice A rationale
Phenytoin is highly unstable and will precipitate if mixed with dextrose solutions. It must only be diluted with 0.9 percent sodium chloride. Incorrect dilution can lead to crystalline emboli and loss of drug efficacy during administration.
Choice B rationale
Intravenous phenytoin is a known vesicant that can cause purple glove syndrome if administered into small peripheral veins like those in the hand. Use of a large-bore catheter in a large vein or central line is preferred.
Choice C rationale
Rapid infusion of phenytoin can lead to severe cardiovascular collapse, including hypotension and fatal dysrhythmias. The infusion rate should not exceed 50 mg per minute to allow the heart to tolerate the drug's membrane-stabilizing effects safely.
Choice D rationale
The standard therapeutic range for phenytoin is 10 to 20 mcg per mL, not 20 to 30 mg per mL. Levels exceeding 20 mcg per mL often result in toxicity, characterized by nystagmus, ataxia, and decreased mental status.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Postoperative care for intermaxillary fixation involves prioritizing the airway due to mechanical obstruction. Knowledge of airway management and emergency procedures is necessary to prevent life threatening complications associated with vomiting or secretions when the jaws are wired shut.
Choice A rationale
Pain management is important for postoperative recovery and client comfort. However, it is not the highest priority when compared to the immediate life threatening risk of an obstructed airway, which is common in clients with wired jaws.
Choice B rationale
Oral hygiene is necessary to prevent infection and maintain tissue integrity after mandibular surgery. While important for long term healing, it is a secondary concern that follows the immediate stabilization of respiratory function and airway clearance.
Choice C rationale
Intermaxillary fixation involves wiring the jaws together, making it impossible for the client to clear their airway if they vomit. Preventing aspiration is the priority because it can lead to immediate respiratory distress, pneumonia, or death.
Choice D rationale
Adequate nutrition is vital for bone healing and recovery after a fracture. However, nutritional needs are addressed once the client is stable and the airway is secured. Airway patency always takes precedence over metabolic or nutritional support.
Correct Answer is D
Explanation
This question involves delegation principles in hospice care. Knowledge of the scope of practice for volunteers versus clinical staff is required. It focuses on identifying non-clinical, psychosocial support tasks appropriate for an unlicensed, non-medical volunteer to perform.
Choice A rationale
Providing spiritual support is a specialized role typically reserved for chaplains or trained clergy members. While volunteers are supportive, this task involves professional spiritual counseling and assessment beyond a general volunteer scope of practice.
Choice B rationale
Assessing the availability and functionality of medical equipment is a clinical responsibility. The nurse or a medical technician must ensure that the home environment is safe and that technical care requirements are met appropriately.
Choice C rationale
Personal care, such as sponge baths and skin assessments for bony prominences, involves physical contact and monitoring for skin breakdown. These tasks are typically delegated to nursing assistants or home health aides, not volunteers.
Choice D rationale
Volunteers in hospice are trained to provide companionship and emotional presence. Sitting with a client to reminisce provides psychosocial support and comfort, which falls within the volunteer's role of enhancing the client's quality of life.
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