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
Explanation
A) Gallstones: Gemfibrozil is associated with an increased risk of gallstones. This medication can alter the metabolism of lipids and bile, potentially leading to the formation of gallstones. Clients should be monitored for symptoms such as abdominal pain or discomfort that could indicate gallbladder issues.
B) Decreased PT time: Gemfibrozil does not typically affect prothrombin time (PT). Instead, it may interact with anticoagulants and potentially increase PT time, requiring careful monitoring in patients taking both medications.
C) Hyperkalemia: While hyperkalemia can occur with certain lipid-lowering medications, it is not a common side effect associated with gemfibrozil. This drug primarily affects triglycerides and cholesterol levels without significantly impacting potassium levels.
D) Increased creatinine clearance: Gemfibrozil is not known to increase creatinine clearance; in fact, it can sometimes affect renal function. Monitoring kidney function is important, but increased creatinine clearance is not an expected outcome with this medication.
Correct Answer is A
Explanation
A) Losartan (Cozaar): This medication is an angiotensin II receptor blocker (ARB) and is often used as an alternative for patients who experience a cough due to ACE inhibitors. Unlike ACE inhibitors, ARBs do not typically cause a cough because they do not affect bradykinin levels, making losartan an appropriate choice for managing hypertension without the adverse effect of a persistent cough.
B) Hydralazine HCL (Apresoline): While hydralazine is an antihypertensive, it works through a different mechanism (direct vasodilation) and is not a first-line alternative for patients with a history of ACE inhibitor-induced cough. It's generally used in specific situations, such as severe hypertension or heart failure.
C) Furosemide (Lasix): This is a loop diuretic primarily used for conditions like heart failure or edema, rather than for the management of hypertension alone. It does not address the underlying hypertension in the same manner as ACE inhibitors or ARBs.
D) Metoprolol (Lopressor): This is a beta-blocker that can be used for hypertension, but it does not directly address the issue of cough related to ACE inhibitors. Switching to a beta-blocker may not be the best option if the client is specifically seeking to avoid the cough associated with ACE inhibitors.