The nurse is caring for a client with acute kidney injury who is receiving tube feeding via a nasogastric tube. The client is receiving a nutritional formula specifically for renal disease. What are the characteristics of this formula that make it appropriate for this client? (Select all that apply.)
Higher calories
Higher phosphorus
Higher calcium
Lower sodium
Lower potassium
Correct Answer : A,D,E
Acute kidney injury (AKI) requires specific nutritional support to manage the buildup of nitrogenous wastes and electrolytes. Renal-specific formulas are designed to be calorie-dense but low in volume to accommodate fluid restrictions. These formulas carefully limit electrolytes that the kidneys can no longer effectively regulate, thereby preventing life-threatening cardiac arrhythmias and neurological complications associated with metabolic derangements during the oliguric phase.
Rationale:
A. Renal-specific formulas provide higher calories in a concentrated, lower-volume format. This is necessary because patients with AKI are often in a hypermetabolic state but must adhere to strict fluid restrictions. Providing dense caloric intake prevents the breakdown of body protein (catabolism), which would otherwise increase the production of toxic nitrogenous waste products like urea.
B. Higher phosphorus is incorrect; renal formulas must contain lower levels of phosphorus. In kidney injury, phosphorus excretion is impaired, leading to hyperphosphatemia. High phosphorus levels can cause calcium to drop and lead to dangerous calcium-phosphate deposits in soft tissues. Therefore, a specialized renal formula is specifically designed to be low in phosphorus.
C. Higher calcium is not a standard characteristic of renal formulas. While calcium levels are monitored, the primary concern in the acute phase of kidney injury is the limitation of electrolytes like potassium and phosphorus. Indiscriminately increasing calcium can be dangerous if phosphorus levels are high, as it increases the risk of metastatic calcification in the body's tissues.
D. Lower sodium is a key characteristic because the injured kidneys cannot excrete sodium effectively, leading to water retention and hypertension. Limiting sodium helps manage fluid volume excess and reduces the workload on the cardiovascular system. This restriction is essential to prevent peripheral edema, pulmonary congestion, and the dangerous elevation of systemic blood pressure.
E. Lower potassium is a vital characteristic because AKI often leads to hyperkalemia, which can cause fatal cardiac arrhythmias. Since the kidneys are the primary route for potassium excretion, an injured kidney allows potassium to accumulate rapidly in the serum. A formula with low potassium is essential to maintain serum levels within the safe range of 3.5 to 5.0 mEq/L.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Diverticulitisis the acute inflammation or infection of small pouches (diverticula) in the colonic wall. During an active flare, the goal of treatment is bowel restto reduce irritation and allow the inflammation to subside. Once the acute phase passes, the therapeutic focus shifts to long-term prevention by increasing stool bulk, which reduces the intraluminal pressure that causes diverticula to form.
Rationale:
A.Maintaining an exclusively low-fiber diet indefinitely is incorrect. While low fiber is necessary during acute inflammation, a chronic lack of fiber leads to constipation and high colonic pressure, which are the primary causes of diverticulosis. Long-term management must eventually include fiber to prevent further pouches from developing and to maintain healthy bowel movements.
B.Recommending a high-fiber diet during an active flare-up is dangerous. Fiber adds bulk and stimulates peristalsis, which can irritate the inflamed diverticula and potentially lead to bowel perforation or abscess formation. The timing of fiber intake must be carefully adjusted based on the presence or absence of active infection and colonic inflammation.
C.The nurse should state to consume a low-fiber dietduring the active phase and a high-fiber dietafter resolution. Low fiber minimizes bowel activity while the diverticula are inflamed and tender. Once the inflammation is gone, high fiber is essential to prevent future exacerbations by ensuring soft, bulky stools that pass easily through the colon without causing pressure.
D.This statement is the exact opposite of the correct clinical protocol. Providing high fiber during an active infection would exacerbate the patient's pain and increase the risk of complications. Conversely, switching to low fiber after the infection resolves would predispose the patient to the very conditions that lead to the recurrence of diverticulitis and associated pain.
Correct Answer is C
Explanation
GERD can lead to severe extra-esophageal complications if gastric refluxate reaches the upper airway. During sleep, the protective laryngeal reflexes are diminished, allowing for the microaspirationof acid into the trachea and lungs. This can cause laryngospasm, chronic cough, and nocturnal asthma-like symptoms. Identifying these occurrences is critical to prevent permanent pulmonary damage and to screen for Barrett's esophagus.
Rationale:
A.Reporting the use of lean cuts of meat is a positive finding that indicates the patient is following dietary recommendations to manage their GERD. Lean meats reduce the fat load in the stomach, which helps prevent delayed gastric emptying and minimizes the risk of reflux. This is a sign of effective self-management rather than an alarming finding for the provider.
B.Quitting smoking is a significant health achievement that improves GERD symptoms because nicotine is a known relaxant of the lower esophageal sphincter. This information should be documented as a positive behavioral change in the patient's history. It does not represent a new or worsening complication that requires an urgent medical report or intervention.
C.The nurse must report "waking up gasping for air" because it suggests nocturnal aspirationof gastric contents. This is a serious complication of GERD where acid enters the airway, potentially causing aspiration pneumoniaor bronchospasm. This finding indicates that the patient's GERD is not well-controlled and poses a significant risk to their respiratory health and airway patency.
D.Eating small, frequent meals is a recommended lifestyle modification for GERD. This practice prevents excessive gastric distention, which reduces the pressure against the lower esophageal sphincter and decreases the volume of acid available for reflux. This finding shows the patient is adhering to appropriate non-pharmacological management strategies and is not a cause for medical concern.
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