he nurse is preparing to administer digoxin (Lanoxin) to a client experiencing atrial fibrillation. Which of the following electrolyte imbalances would the nurse assess to reduce the incidence of toxicity with digoxin (Lanoxin)?
hypokalemia
hyperkalemia
hypocalcemia
hypernatremia
The Correct Answer is A
A) Hypokalemia: Hypokalemia, or low potassium levels, significantly increases the risk of digoxin toxicity. Since digoxin competes with potassium for binding at the sodium-potassium ATPase site in the heart, low potassium levels can lead to increased digoxin effects and toxicity. Therefore, it is crucial to monitor potassium levels and correct any deficiencies before administering digoxin.
B) Hyperkalemia: While hyperkalemia is a serious concern and can also affect digoxin therapy, it usually results in decreased effectiveness of digoxin rather than increasing toxicity. Elevated potassium levels can diminish the drug's positive inotropic effect.
C) Hypocalcemia: Although calcium levels can influence cardiac function, hypocalcemia is not directly related to digoxin toxicity. Monitoring calcium is important for overall cardiac health, but it is not the primary focus when assessing the risk for digoxin toxicity.
D) Hypernatremia: Elevated sodium levels do not have a direct impact on the efficacy or toxicity of digoxin. While sodium levels are essential to monitor for overall health, they are not critical in the context of digoxin administration and toxicity risk.
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Correct Answer is ["A","B","C","D","E"]
Explanation
A) Angioedema: Quinapril, an ACE inhibitor, can cause angioedema, which is a serious allergic reaction characterized by swelling of the deeper layers of the skin. This side effect is critical to monitor, as it can lead to airway obstruction.
B) Dry non-productive cough: A persistent dry cough is a well-known side effect of ACE inhibitors like quinapril. This occurs due to the accumulation of bradykinin and can be bothersome enough to require discontinuation of the medication.
C) Hyperkalemia: Quinapril can lead to increased potassium levels in the blood, a condition known as hyperkalemia. This is due to the drug's mechanism of action, which reduces aldosterone secretion, leading to decreased potassium excretion.
D) First dose phenomenon: This refers to a significant drop in blood pressure following the first dose of an ACE inhibitor, which can lead to dizziness or fainting. Patients are often advised to take the first dose at bedtime to minimize this risk.
E) Hypotension: Quinapril can cause hypotension, particularly after the initial dosing or in patients who are dehydrated or on diuretics. It’s important for patients to be aware of this potential side effect.
F) Hypertension: Quinapril is used to treat hypertension, so it is not a side effect associated with this medication. Instead, the goal of treatment is to lower blood pressure, making this option incorrect.
Correct Answer is C
Explanation
A) Platelet counts: Monitoring platelet counts is not necessary with atorvastatin therapy. While certain medications may affect platelet levels, atorvastatin primarily targets lipid levels and does not have a significant impact on platelet function.
B) Lung function test: Lung function tests are not relevant for atorvastatin use. These tests are typically utilized for assessing respiratory conditions and are not part of the routine monitoring for cholesterol-lowering medications.
C) Liver function test: Atorvastatin can affect liver function, so it is essential to monitor liver
enzymes (such as AST and ALT) regularly. Routine liver function tests help identify any potential hepatotoxicity early, allowing for timely intervention if liver function declines.
D) Bun and creatinine levels: While monitoring renal function can be important in some contexts, it is not a routine requirement specifically for atorvastatin. However, it may be necessary in certain patient populations or if there are concerns about kidney function, but liver function tests are the primary focus with this medication.