Which condition would indicate to the nurse that the patient has a phenytoin (Dilantin) toxicity?

Nystagmus

Strabismus

Blurry vision

Amblyopia

Answer and Explanation

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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Correct Answer is A

Explanation

A.Computerized tomography angiography (CTA)

This is a likely diagnostic test that the provider may prescribe. CTA uses computed tomography (CT) imaging to visualize the blood vessels in the brain and neck. It can help identify areas of stenosis, occlusion, or other abnormalities in the blood vessels that may contribute to the TIA symptoms.

B. Complete blood count (CBC)

A complete blood count (CBC) is a routine laboratory test that assesses various components of blood, such as red blood cells, white blood cells, and platelets. While it may not be specific to diagnosing a transient ischemic attack (TIA), it can help evaluate for underlying conditions such as anemia or thrombocytosis that could contribute to TIA symptoms or increase the risk of stroke.

C. Prothrombin time (PT)

Prothrombin time (PT) is a laboratory test that evaluates the clotting ability of blood and is typically used to monitor anticoagulant therapy. While abnormal coagulation parameters may be associated with certain conditions that predispose to TIA (such as atrial fibrillation), PT alone is not a specific diagnostic test for TIA.

D. Transesophageal echocardiogram (TEE)

This is another possible diagnostic test that the provider may prescribe. TEE is a specialized echocardiogram that provides detailed images of the heart structures by inserting an ultrasound probe

A. "I will notify my provider before taking any other medications." B. "I have made an appointment to see my dentist next week." C. "I will take this medication with meals." D. "I'll be glad when my seizures stop so I can quit taking this medicine." E. “I’ll take this medication before meals.”

Correct Answer is C

Explanation

A. "I will notify my provider before taking any other medications."

This statement demonstrates understanding of the importance of consulting the provider before taking any other medications. It is correct because phenytoin may interact with other drugs, so notifying the provider is essential to avoid potential interactions.

B. "I have made an appointment to see my dentist next week."

This statement indicates that the client understands the importance of dental care while taking phenytoin. Phenytoin can cause gum overgrowth (gingival hyperplasia), so regular dental check-ups are recommended to monitor oral health. This statement is correct.

C. "I will take this medication with meals."

This statement suggests that the client plans to take phenytoin with meals. However, phenytoin should generally be taken on an empty stomach to enhance absorption, unless gastrointestinal upset occurs. Therefore, this statement indicates a need for further teaching.

D. "I'll be glad when my seizures stop so I can quit taking this medicine."

This statement reflects a misconception about the management of epilepsy. Phenytoin is typically used as a long-term treatment to prevent seizures, not as a short-term solution to stop seizures. Therefore, this statement indicates a need for further education about the chronic nature of epilepsy and the need for ongoing medication adherence.

E. “I’ll take this medication before meals.”

This statement correctly indicates the timing of phenytoin administration before meals. Taking phenytoin before meals helps enhance absorption and minimize the risk of gastrointestinal side effects. Therefore, this statement is correct.

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Which condition would indicate to the nurse that the patient has a phenytoin (Dilantin) toxicity?

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Naxlex Comprehensive Predictor Exams

A nurse is caring for a client in the emergency department who has a preliminary diagnosis of a transient ischemic attack (TIA). Which of the following diagnostic testing should the nurse anticipate the provider to prescribe?

Correct Answer is A

Explanation

A nurse is reinforcing teaching with a client who has a new prescription for phenytoin. The nurse should recognize that which of the following statements by the client indicates a need for further teaching?

Correct Answer is C

Explanation

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