A 55-year-old man with sepsis secondary to pneumonia develops acute kidney injury. His creatinine has risen to 4.2 mg/dL and he requires hemodialysis. Regarding the management and prognosis of acute kidney injury in sepsis, which of the following statements is NOT true?

Explanation

## Acute Kidney Injury in Sepsis — Management Principles **Key Point:** The management of AKI in sepsis follows the Surviving Sepsis Campaign guidelines, which emphasize fluid resuscitation, vasopressor support, and source control. Loop diuretics have NO proven mortality benefit in AKI. ### Evidence-Based Management of Septic AKI | Intervention | Evidence | Role in AKI | |--------------|----------|-------------| | **Early fluid resuscitation** | Strong | Restores renal perfusion; improves outcomes | | **Vasopressors (after fluids)** | Strong | Maintains MAP ≥65 mmHg; prevents hypotension | | **Loop diuretics** | Weak/Neutral | No mortality benefit; may worsen outcomes | | **Renal replacement therapy** | Supportive | Indicated for severe AKI, hyperkalemia, pulmonary edema | | **Source control** | Strong | Antibiotics, drainage, definitive treatment | **High-Yield:** The RENAL trial (2006) and subsequent meta-analyses showed that loop diuretics do NOT improve survival, reduce duration of AKI, or decrease need for RRT. They may increase ototoxicity and nephrotoxicity without benefit. **Clinical Pearl:** In septic shock, the sequence is: (1) aggressive fluid resuscitation (30 mL/kg crystalloid), (2) vasopressors if MAP remains <65 mmHg despite fluids, (3) source control (antibiotics, drainage). Diuretics are used only for volume overload or pulmonary edema, not to "improve" renal function. **Warning:** A common misconception is that diuretics "flush the kidneys" and improve AKI recovery. This is false. Diuretics may worsen renal perfusion and delay recovery. ### Why the Other Options Are True - **Early goal-directed fluid resuscitation:** Landmark Rivers et al. (2001) trial showed improved outcomes with early resuscitation targeting CVP, MAP, and ScvO₂. - **Vasopressors after adequate fluid resuscitation:** Norepinephrine is first-line; maintains renal perfusion pressure when fluids alone are insufficient. - **MAP ≥65 mmHg:** Consensus target to maintain glomerular filtration and prevent further renal injury in septic shock. [cite:Harrison 21e Ch 325; Surviving Sepsis Campaign 2021]