A 40-year-old patient with polycystic kidney disease is scheduled to receive a kidney transplant.

When the nurse begins to administer 2 units of leukocyte-poor packed red blood cells to treat a low hemoglobin level, the patient asks why this has been prescribed.

What is the appropriate response from the nurse?

Choice A rationale:
This statement belongs to the "Request" portion of the SBAR format. It articulates a specific action the nurse wants the healthcare provider to take.
It's not part of the Background because it doesn't provide any historical or contextual information about the patient's condition.
Choice B rationale:
This statement is the correct choice for the "Background" portion of the SBAR format.
It provides essential background information about the patient's recent medical history, specifically the recent hysterectomy.
This information is crucial for the healthcare provider to understand the context of the current situation and make informed decisions about pain management.
Choice C rationale:
This statement provides additional patient information, but it's not the most relevant for the Background section in this context.
The patient's aversion to NSAIDs might be important for medication choices, but it doesn't directly address the current issue of pain management after a hysterectomy.
Choice D rationale:
This statement provides important information about the patient's allergies, but it's not the most relevant for the Background section in this context.
Allergies are crucial for medication safety, but they don't directly address the current issue of pain management or provide context about the patient's recent surgery.

Choice A rationale:
Metabolic alkalosis is a condition characterized by an increase in the pH of the blood due to an excess of bicarbonate (HCO3-) in the body. It is not typically caused by severe diarrhea. In fact, diarrhea can often lead to a loss of bicarbonate, which can contribute to metabolic acidosis.
Causes of metabolic alkalosis include: excessive vomiting, use of diuretics, and excessive intake of alkali such as antacids. Clinical manifestations of metabolic alkalosis include: muscle twitching, paresthesias, seizures, confusion, and lethargy.
Choice B rationale:
Respiratory alkalosis is a condition characterized by a decrease in the partial pressure of carbon dioxide (PaCO2) in the blood, leading to an increase in blood pH. It is caused by hyperventilation, which removes excess CO2 from the body. Severe diarrhea does not typically cause hyperventilation.
Causes of respiratory alkalosis include: anxiety, hyperventilation syndrome, high altitude sickness, and pulmonary embolism. Clinical manifestations of respiratory alkalosis include: lightheadedness, dizziness, paresthesias, palpitations, and tetany.
Choice C rationale:
Respiratory acidosis is a condition characterized by an increase in the partial pressure of carbon dioxide (PaCO2) in the blood, leading to a decrease in blood pH. It is caused by hypoventilation, which prevents the body from removing enough CO2. Severe diarrhea does not typically cause hypoventilation.
Causes of respiratory acidosis include: chronic obstructive pulmonary disease (COPD), pneumonia, asthma, and neuromuscular disorders.
Clinical manifestations of respiratory acidosis include: headache, confusion, somnolence, and coma.
Choice D rationale:
Metabolic acidosis is a condition characterized by a decrease in the pH of the blood due to an excess of acid in the body or a loss of bicarbonate. Severe diarrhea can lead to metabolic acidosis through several mechanisms:
Loss of bicarbonate in the stool: Diarrhea often contains a significant amount of bicarbonate, which can be lost from the body in large amounts during severe diarrheal episodes. This loss of bicarbonate can lead to a decrease in the blood's pH, resulting in metabolic acidosis.
Dehydration: Severe diarrhea can also lead to dehydration, which can concentrate acids in the blood and contribute to metabolic acidosis.
Lactic acidosis: In some cases, severe diarrhea can also cause lactic acidosis, a type of metabolic acidosis that occurs when there is a buildup of lactic acid in the body. This can happen due to impaired circulation or tissue hypoxia, which can occur as a complication of severe diarrhea.