A nurse is providing teaching to an older adult client who has a seizure disorder and a new prescription for phenytoin. Which of the following instructions should the nurse include?

Choice A reason

The client is observed displaying a shuffling gait while walking in the hall is the correct answer. The nurse should recognize that observing a shuffling gait in a client who is taking antipsychotic medication is an adverse effect that must be reported to the healthcare provider. A shuffling gait is a movement disorder known as parkinsonism, which can be a side effect of some antipsychotic medications, particularly first-generation or typical antipsychotics.

Parkinsonism includes symptoms similar to Parkinson's disease, such as a shuffling walk, muscle stiffness, tremors, and difficulty with balance and coordination. It can occur as a result of blocking dopamine receptors in the brain, leading to an imbalance in dopamine levels.

Choice B reason:

The client mumbling quietly while alone is not correct because in the day room may be related to the symptoms of schizophrenia, and it does not indicate an adverse effect of the antipsychotic medication.

Choice C reason:

The client feeling light-headed when standing up quickly is not correct and it may be related to postural hypotension, which can be a side effect of some antipsychotic medications. While it should be monitored and reported if persistent or severe, it is not as urgent as reporting a shuffling gait.

Choice D reason:

The client stating that being in the sun hurts their eyes does not necessarily indicate an adverse effect of the antipsychotic medication. It may be related to other factors or unrelated to the medication.

Answer:D. Troponin T test

Rationale:

A. Creatine kinase (CK) test: While creatine kinase isoenzymes, including CK-MB, can be elevated following myocardial infarction (MI), they are not specific to cardiac muscle injury. CK is found in various tissues throughout the body, so elevated levels can also indicate damage to skeletal muscle or brain tissue, among other sources.

B. Creatine kinase-myocardial band (CK-MB) test: CK-MB is a cardiac-specific isoform of creatine kinase, and elevated levels can indicate myocardial injury, particularly in the context of an acute MI. However, troponin T is a more sensitive and specific marker for myocardial injury.

C. Brain natriuretic peptide (BNP) test: Brain natriuretic peptide is primarily used in the diagnosis and management of heart failure. While elevated BNP levels can indicate heart muscle strain or stress, they are not specific markers for acute myocardial infarction or early injury to the cardiac muscle.

D. Troponin T test: This is the correct answer. Troponin T is a highly specific marker for cardiac muscle injury. Elevated troponin levels can be detected within hours of myocardial infarction and persist for several days, making it an essential tool in the diagnosis of acute coronary syndromes, including myocardial infarction. Troponin T is considered one of the gold standard biomarkers for detecting early injury to the cardiac muscle.