Which condition would indicate to the nurse that the patient has a phenytoin (Dilantin) toxicity?
Nystagmus
Strabismus
Blurry vision
Amblyopia
The Correct Answer is A
A. Nystagmus:
Nystagmus is an involuntary, rhythmic movement of the eyes, which can be rapid and jerky. It is a common neurological manifestation of phenytoin toxicity. Patients experiencing phenytoin toxicity may exhibit horizontal or vertical nystagmus, which can be detected upon physical examination.
B. Strabismus:
Strabismus, also known as crossed eyes or squint, refers to a misalignment of the eyes. While strabismus can have various causes, it is not typically associated with phenytoin toxicity. Therefore, it is less likely to indicate phenytoin toxicity compared to nystagmus.
C. Blurry vision:
Blurry vision, or visual disturbances, can occur in patients experiencing phenytoin toxicity. However, it is a non-specific symptom and can be observed in various other conditions as well. Patients with phenytoin toxicity may experience blurry vision, double vision (diplopia), or other visual disturbances due to the effects of the medication on the central nervous system.
D. Amblyopia:
Amblyopia, also known as lazy eye, is a condition characterized by reduced vision in one or both eyes. It is typically associated with visual development during childhood and is not directly related to phenytoin toxicity. Therefore, it is less likely to indicate phenytoin toxicity compared to nystagmus or other neurological manifestations.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Decreased pedal pulses:
Decreased pedal pulses are not typically associated with increased intracranial pressure. Instead, they may indicate peripheral vascular disease or reduced perfusion to the lower extremities. Monitoring peripheral pulses is important for assessing circulation but is not directly related to intracranial pressure changes.
B. Hypertension:
Hypertension can be a manifestation of increased intracranial pressure. The body may respond to elevated intracranial pressure by increasing blood pressure to maintain cerebral perfusion pressure. However, hypertension alone is not specific to increased ICP and can have various causes.
C. Peripheral edema:
Peripheral edema is not a typical manifestation of increased intracranial pressure. It may occur in conditions such as heart failure or renal dysfunction but is not directly related to intracranial pressure changes following a craniotomy.
D. Diarrhea:
Diarrhea is not a common manifestation of increased intracranial pressure. Increased ICP is more likely to manifest with symptoms such as headache, nausea, vomiting, altered level of consciousness, and focal neurological deficits.
Correct Answer is ["0.6"]
Explanation
To calculate the dose of diazepam in mL, the nurse should use the formula:
Dose (mL) = Desired dose (mg) / Available dose (mg/mL)
Plugging in the values from the question, we get:
Dose (mL) = 3 mg / 5 mg/mL
Simplifying, we get:
Dose (mL) = 0.6 mL
Therefore, the nurse should administer 0.6 mL of diazepam IM.
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