A nurse in a provider's office is reviewing the laboratory results of four clients who take digoxin.
Which of the following clients is at risk for developing digoxin toxicity?
A client who takes glyburide for type 2 diabetes mellitus.
A client who takes furosemide for hypertension.
A client who takes cimetidine to reduce gastric acid secretion.
A client who takes azelastine for allergic rhinitis.
The Correct Answer is B
Choice A rationale:
A client who takes glyburide for type 2 diabetes mellitus is not at significant risk for developing digoxin toxicity. Glyburide is an antidiabetic medication and does not interact directly with digoxin.
Choice B rationale: Furosemide, a loop diuretic, can cause electrolyte imbalances such as hypokalemia (normal potassium levels: 3.5 to 5.0 mEq/L) and hypomagnesemia (normal magnesium levels: 1.7 to 2.2 mg/dL). These imbalances increase the sensitivity to digoxin and the risk of toxicity. Digoxin toxicity is associated with symptoms like nausea, vomiting, and arrhythmias. Furosemide's impact on electrolytes makes it a significant risk factor for digoxin toxicity.
Choice C rationale: Cimetidine, a histamine H2 receptor antagonist, can inhibit the metabolism of certain drugs by affecting liver enzymes. However, it does not significantly alter digoxin levels or increase the risk of toxicity. Normal liver enzyme levels include ALT (7 to 56 U/L) and AST (10 to 40 U/L). While cimetidine may interact with other medications, its effect on digoxin is minimal.
Choice D rationale:
A client who takes azelastine for allergic rhinitis is not at significant risk for developing digoxin toxicity. Azelastine is an antihistamine and does not interact directly with digoxin.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale:
"I can plan to eat rice instead of baked potatoes.”. This choice demonstrates an understanding of dietary sources of potassium. Baked potatoes are a good source of potassium, and the client's willingness to substitute rice for baked potatoes indicates that they are aware of alternative potassium-rich foods. Potassium is essential for various bodily functions, including maintaining proper heart and muscle function. The client's willingness to make a dietary adjustment is a positive sign.
Choice B rationale:
"Adding pecans will be a change I can readily make.”. While pecans are a good source of potassium, this choice does not directly address the client's ability to substitute a potassium-rich food for one they might need to avoid. It focuses on a new addition to their diet rather than a substitution, making it a less relevant response to the teaching.
Choice C rationale:
"I will eat cantaloupe for my morning snack.”. Cantaloupe is indeed a good source of potassium, but this choice does not indicate an understanding of how to substitute potassium-rich foods in their diet. It only mentions adding cantaloupe as a snack without addressing the potential need for replacing other foods high in potassium. Therefore, it does not fully demonstrate comprehension of the teaching.
Choice D rationale:
"I will miss eating yogurt every day for breakfast.”. This choice expresses a sentiment but does not show an understanding of the teaching regarding dietary sources of potassium. It merely states that the client will miss yogurt without providing any insight into their ability to make appropriate dietary choices to maintain adequate potassium intake.
Correct Answer is A
Explanation
Choice A rationale:
Hypovolemic shock is characterized by a decrease in blood volume, leading to low blood pressure and compensatory mechanisms such as a high pulse rate. When the body experiences a significant loss of blood or fluid, it attempts to maintain perfusion to vital organs by increasing the heart rate to ensure an adequate blood supply. Low blood pressure and a high pulse rate are classic signs of hypovolemic shock.
Choice B rationale:
A low BP and low pulse rate are not indicative of hypovolemic shock. Hypovolemic shock is associated with a rapid and weak pulse rate as the body tries to compensate for decreased blood volume. A low pulse rate could suggest other conditions, such as bradycardia, rather than hypovolemic shock.
Choice C rationale:
High BP and high pulse rate are not typical findings in hypovolemic shock. Hypovolemic shock is characterized by low blood pressure and a high pulse rate as the body attempts to compensate for the reduced blood volume. High blood pressure is more commonly associated with conditions like hypertension, not hypovolemic shock.
Choice D rationale:
High BP and low pulse rate are not consistent with the characteristics of hypovolemic shock. As mentioned earlier, hypovolemic shock is marked by low blood pressure and a high pulse rate due to the body's efforts to maintain adequate perfusion. High blood pressure and a low pulse rate may suggest other medical conditions unrelated to hypovolemic shock.
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