Choice A rationale
Carcinoembryonic Antigen (CEA) is a protein used as a tumor marker, particularly for cancers of the gastrointestinal tract. It is not directly related to volume depletion caused by gastrointestinal illnesses.
Choice B rationale
B12 level is important for nerve function and the formation of red blood cells. It is not directly related to volume depletion caused by gastrointestinal illnesses.
Choice C rationale
Electrolyte imbalance is the correct answer. Gastrointestinal illnesses often cause symptoms such as vomiting and diarrhea, which can lead to significant loss of fluids and electrolytes.
Monitoring electrolyte levels is crucial in these cases to prevent complications related to volume depletion.

Choice D rationale
Hemoglobin level is an indicator of the amount of oxygen-carrying protein in the blood. While it is an important lab value, it is not the most relevant in the context of volume depletion due to gastrointestinal illnesses.

Choice A rationale

Administering appropriate antibiotic therapy is a common nursing intervention to manage H. pylori infection. The recommended treatment for H. pylori typically involves using a triple-

drug therapy regimen, including a proton pump inhibitor or PPI like omeprazole, and two antibiotics, which include clarithromycin plus either metronidazole or amoxicillin. This treatment helps eradicate the bacterial infection through different mechanisms of action.

Choice B rationale

While maintaining a high-fiber diet is generally beneficial for overall health, it is not specifically related to the management of H. pylori infection. The primary treatment for H. pylori is antibiotic therapy, not dietary changes.

Choice C rationale

Over-the-counter antacids can help to neutralize stomach acid and provide temporary relief from symptoms, but they do not treat the underlying H. pylori infection. Therefore, while they may be used as part of symptom management, they are not a primary treatment strategy.

Choice D rationale

Assisting the patient with proper hand hygiene is always important in healthcare settings to prevent the spread of infections. However, it is not specifically related to the management of H. pylori infection. The bacteria are typically contracted during childhood, and the exact modes of transmission are not fully understood.