A client who has developed acute kidney injury (AKI) due to an aminoglycoside antibiotic has moved from the oliguric phase to the diuretic phase of AKI. Which parameters are most important for the nurse to plan to carefully monitor?
A.
Hypovolemia and electrocardiographic (ECG) changes.
B.
Uremic irritation of mucous membranes and skin surfaces.
C.
Side effects of total parental nutrition (TPN) and Intralipids.
D.
Elevated creatinine and blood urea nitrogen (BUN)
The correct answer and Explanation is :
In the diuretic phase of acute kidney injury (AKI), the most critical parameters for the nurse to monitor are A. Hypovolemia and electrocardiographic (ECG) changes. Here’s an explanation:
Diuretic Phase of AKI
The diuretic phase follows the oliguric phase of AKI, characterized by a significant increase in urine output. While this phase indicates that the kidneys are beginning to recover, it also poses certain risks and requires close monitoring to prevent complications.
1. Hypovolemia
During the diuretic phase, the kidneys are actively excreting a large volume of urine, which can lead to substantial fluid loss. This increased urine output can result in hypovolemia, or a decreased blood volume, which can cause dehydration and a drop in blood pressure. Monitoring for signs of hypovolemia is crucial because it helps in ensuring that the patient maintains adequate fluid balance and prevents complications such as hypotension and shock.
Key Points to Monitor:
- Fluid Intake and Output: Regularly measure the amount of urine output and compare it with fluid intake.
- Vital Signs: Monitor blood pressure and heart rate for signs of hypotension or tachycardia.
- Physical Examination: Look for signs of dehydration, such as dry mucous membranes, decreased skin turgor, and dizziness.
2. Electrocardiographic (ECG) Changes
AKI and the associated diuretic phase can affect electrolyte balance, particularly potassium levels. Diuretic therapy can lead to significant shifts in potassium and other electrolytes, which can manifest as changes in the ECG.
Key Points to Monitor:
- Electrolyte Levels: Regularly check levels of potassium, sodium, and other electrolytes. Both hypokalemia (low potassium) and hyperkalemia (high potassium) can lead to life-threatening ECG changes.
- ECG Monitoring: Continuous ECG monitoring helps in detecting any arrhythmias or changes in cardiac rhythm that may be related to electrolyte imbalances.
Summary
Monitoring hypovolemia and ECG changes is critical during the diuretic phase of AKI to prevent complications related to fluid imbalance and electrolyte disturbances. While elevated creatinine and BUN levels are important indicators of kidney function, they are more reflective of the overall progress of AKI rather than immediate complications that arise during the diuretic phase. Similarly, uremic irritation, side effects of TPN, and Intralipids are relevant but not as central to the immediate concerns of fluid and electrolyte management in this phase.