A nurse is teaching a class about pulmonary circulation. The nurse should include that blood flows from the heart to the lungs from the right ventricle starting from which of the following locations?

A) Bicarbonate:
While bicarbonate levels may be relevant in some cases, they are not typically a primary consideration before administering furosemide. Furosemide primarily affects electrolyte balance, particularly potassium and sodium, rather than bicarbonate levels.

B) Potassium:
This is the correct answer. Before administering furosemide, it is essential to review the client's potassium levels because furosemide is a loop diuretic that can lead to potassium depletion. Monitoring potassium levels helps prevent hypokalemia, which can lead to cardiac dysrhythmias and other complications, especially in clients with heart failure.

C) Phosphate:
Phosphate levels are not typically a primary concern before administering furosemide. Furosemide primarily affects sodium and potassium levels rather than phosphate levels.

D) Carbon dioxide:
Carbon dioxide levels are not typically a primary consideration before administering furosemide. Furosemide primarily affects electrolyte balance rather than carbon dioxide levels.

Answer: A. “Syncope episodes may occur when taking this medication.”

Rationale:

A) “Syncope episodes may occur when taking this medication.”
Syncope (fainting) is a possible side effect of donepezil, a cholinesterase inhibitor used to treat Alzheimer’s disease. Donepezil can cause bradycardia, which may lead to a decrease in blood pressure and reduced blood flow to the brain, resulting in syncope. It's important for family members to monitor for episodes of dizziness, fainting, or lightheadedness, particularly when the client changes positions (orthostatic hypotension).

B) “You will need to monitor for constipation.”
Constipation is not commonly associated with donepezil use. In fact, donepezil may cause diarrhea or gastrointestinal upset due to its cholinergic effects. Family members should be more concerned about potential gastrointestinal disturbances such as nausea, vomiting, or diarrhea rather than constipation.

C) “This medication may cause tachycardia.”
Donepezil is more likely to cause bradycardia (a slower-than-normal heart rate) rather than tachycardia (a fast heart rate). Bradycardia is a known side effect because the medication increases acetylcholine, which enhances parasympathetic activity, leading to a slower heart rate.

D) “You should administer the medication each morning.”
Donepezil is typically administered in the evening before bed. This schedule helps reduce the risk of daytime gastrointestinal side effects, like nausea and vomiting, which can interfere with daily activities. Administering the medication at night can also reduce the impact of potential dizziness or syncope during the day.