Which of the following electrolytes usually must be restricted in patients with acute kidney injury? O Bicarbonate O Calcium O Potassium O Chloride
The Correct Answer and Explanation is:
The correct answer is Potassium.
Explanation:
In patients with acute kidney injury (AKI), the kidneys are unable to effectively filter waste products and regulate electrolyte levels. Potassium is one of the electrolytes that can become dangerously elevated in AKI, a condition known as hyperkalemia.
The kidneys typically help maintain potassium balance by excreting excess potassium in the urine. However, in AKI, renal function is impaired, leading to a reduced ability to clear potassium from the bloodstream. As a result, potassium levels can rise, and this can lead to serious complications, including:
- Cardiac arrhythmias: Elevated potassium levels can disrupt the electrical impulses that regulate the heart’s rhythm, potentially leading to life-threatening arrhythmias such as ventricular fibrillation or even cardiac arrest.
- Muscle weakness: High potassium can also affect the muscles, causing weakness or paralysis, which may be seen in severe cases.
- Nausea and vomiting: These symptoms may also arise as a result of hyperkalemia.
To manage hyperkalemia, healthcare providers will typically restrict potassium intake and may administer treatments to help lower potassium levels, such as potassium-binding resins or dialysis in more severe cases.
Other Electrolytes:
- Bicarbonate: While bicarbonate may be altered in AKI, its levels are not typically as critical as potassium in acute kidney injury. In some cases, bicarbonate may be used to correct metabolic acidosis, which can occur as a result of kidney dysfunction.
- Calcium: Calcium levels may also be altered in AKI, particularly in the setting of acute phosphate retention or calcium-phosphate imbalance, but this is not as commonly restricted as potassium.
- Chloride: Chloride usually does not need to be restricted specifically in AKI. However, it may be part of the electrolyte imbalance that results from acid-base disturbances, such as hyperchloremic metabolic acidosis, but its restriction is not as common.
Therefore, the most commonly restricted electrolyte in patients with AKI is potassium.
