A patient exhibits ptosis of both eyes and the provider orders edrophonium (Tensilon). The nurse notes immediate improvement of the ptosis.
The nurse understands that this patient most likely has which disorder?

Choice A rationale

Coagulation studies assess the blood's ability to clot and are not directly related to the monitoring of phenytoin therapy. These tests are more relevant for patients with bleeding disorders or those on anticoagulant therapy.

Choice B rationale

Serum electrolytes, including levels of sodium, potassium, and calcium, are important for overall health but are not specifically indicative of phenytoin levels. Phenytoin may affect calcium metabolism, but it is not the primary focus for routine monitoring.

Choice C rationale

Renal function tests are crucial for assessing kidney function but do not directly monitor phenytoin therapy. Phenytoin is primarily metabolized in the liver, making liver function tests more relevant.

Choice D rationale

Blood glucose levels should be monitored in patients taking phenytoin as the drug can cause alterations in blood glucose levels. Both hypoglycemia and hyperglycemia have been reported, so it is important to check glucose levels to ensure they remain within a normal range.

Choice A rationale

Poor self-care is not directly associated with reddened, bleeding gums in this context.

Choice B rationale

While aspirin can cause bleeding issues, the context here is related to seizure disorder and phenytoin.

Choice C rationale

Phenytoin, an anticonvulsant used to manage seizures, can cause gingival hyperplasia, leading to reddened and bleeding gums.

Choice D rationale

Hepatotoxicity is related to liver damage and does not present with reddened, bleeding gums.