Which of the following diuretic agents will the nurse teach the patient to avoid food sources that are high in potassium?
Thiazide diuretic Hydrochlorothiazide.
Osmotic diuretic Mannitol.
Potassium sparing diuretic Aldactone.
Loop diuretic Furosemide.
The Correct Answer is C
This is because potassium sparing diuretics do not lower potassium levels in the blood, unlike other types of diuretics. Potassium is an essential electrolyte that serves nerve and muscular functions and is regulated by the kidneys. Low potassium levels can cause irregular heartbeats and other problems. Therefore, patients taking potassium sparing diuretics should avoid food sources that are high in potassium, such as bananas, avocados, spinach, and potatoes.
Choice A is wrong because thiazide diuretics, such as hydrochlorothiazide, can cause low potassium levels in the blood.
Patients taking thiazide diuretics may need to take potassium supplements or eat more potassium-rich foods to prevent hypokalemia.
Choice B is wrong because osmotic diuretics, such as mannitol, do not affect potassium levels in the blood.
They work by increasing the amount of water in the urine, but do not alter the electrolyte balance.
Osmotic diuretics are mainly used to treat cerebral edema and glaucoma.
Choice D is wrong because loop diuretics, such as furosemide, can also cause low potassium levels in the blood.
They work by inhibiting the reabsorption of sodium and water in the loop of Henle, a part of the kidney.
Loop diuretics are used to treat edema and heart failure.
Normal ranges for potassium in the blood are 3.5 to 5.0 millimoles per liter (mmol/L).
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Digoxin is a cardiac glycoside that increases the force of heart contractions (positive inotropy) and decreases the heart rate (negative chronotropy) by inhibiting the sodium-potassium ATPase pump in the cardiac cell membranes and affecting the autonomic tone.This helps to improve the symptoms of heart failure and to control the ventricular rate in atrial fibrillation.
Choice A is wrong because positive chronotropy means increasing the heart rate, which is the opposite of what digoxin does.
Choice B is wrong because negative inotropy means decreasing the force of heart contractions, which is also the opposite of what digoxin does.
Choice D is wrong because positive inotropy and positive chronotropy would both increase the workload of the heart, which is not desirable in heart failure or atrial fibrillation.
Normal ranges for digoxin are 0.5 to 2 ng/mL for heart failure and 0.8 to 2 ng/mL for atrial fibrillation.Digoxin has a narrow therapeutic window and can cause serious side effects if overdosed or underdosed.
Correct Answer is ["A","B"]
Explanation
Pentoxifylline is a medication that improves blood flow and oxygen delivery to the tissues in patients with peripheral vascular disease (PVD), a condition that causes narrowing of the arteries in the legs.Pentoxifylline can help reduce the symptoms of intermittent claudication, which is cramping pain in the legs that occurs with walking and improves with rest.
Choice A is correct because smoking is a major risk factor for PVD and quitting smoking can improve blood flow and prevent further damage to the arteries.
Choice B is correct because prolonged sitting or standing can reduce blood flow to the legs and worsen symptoms of PVD.
Patients should avoid crossing their legs, wearing tight clothing, or exposing their legs to cold temperatures.They should also elevate their legs when resting and move them frequently.
Choice C is wrong because pentoxifylline should be taken on an empty stomach, at least one hour before or two hours after meals, to increase its absorption and effectiveness.
Choice D is wrong because physical activity is beneficial for patients with PVD and intermittent claudication.
Exercise can improve blood circulation, increase muscle strength, reduce pain, and lower cardiovascular risk factors.Patients should be encouraged to walk regularly, as tolerated, and follow a supervised exercise program if available.
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