A nurse is providing dietary teaching to a client who has chronic kidney disease (CKD). The nurse should instruct the client to limit which of the following nutrients? (Select all that apply.)

Diuretics are the primary class of drugs used to treat volume overload in patients with acute decompensated heart failure (ADHF). These medications help to increase urine output, reducing the overall fluid volume in the body and relieving congestion in the lungs and other tissues.

The goal of using diuretics in ADHF is to alleviate symptoms such as shortness of breath, edema (swelling), and fluid retention by promoting the elimination of excess fluid. The most commonly used diuretics in this setting are loop diuretics (e.g., furosemide, bumetanide), which have a potent diuretic effect and can rapidly reduce fluid overload.

While narcotics, vasodilators, and positive inotropes may have roles in specific cases of ADHF, they are not the primary drugs used to treat volume overload. Narcotics may be used for pain management, vasodilators to reduce afterload (the resistance the heart has to pump against), and positive inotropes to increase the heart's contractility in certain situations. However, the first-line treatment for volume overload in ADHF is diuretic therapy.

For a patient admitted with syncopal (fainting) episodes of unknown origin, the most appropriate action to include in the plan of care is to instruct the patient to call for assistance before getting out of bed.

Syncope can be caused by various factors, including orthostatic hypotension (a drop in blood pressure upon standing) or cardiac-related issues. One of the common triggers for syncopal episodes is getting up from a lying or sitting position too quickly. By instructing the patient to call for assistance before getting out of bed, the nurse aims to prevent falls and potential injuries that may occur due to sudden fainting episodes.

While it's essential to educate the patient about potential causes of syncope (option A) and the benefits of implantable cardioverter-defibrillators (option B) if applicable to their condition, these actions may not directly address the immediate safety concern of preventing falls during syncopal episodes.

Option D, teaching the patient about the need to avoid caffeine and other stimulants, may be relevant if stimulants are identified as potential triggers for syncope in this particular patient. However, it is not the most critical action to include in the initial plan of care for a patient with syncopal episodes of unknown origin.

In summary, the top priority for the nurse is to ensure the safety of the patient by instructing them to call for assistance before getting out of bed to prevent falls during syncopal episodes until further evaluation and diagnosis can determine the cause of the fainting episodes.