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AKI Management Principles: Perfusion, Medications, and Dialysis [ Medical Education ](https://mdster.com/blog?category=medical-education) AKI Management Principles: Perfusion, Medications, and Dialysis ================================================================= A practical bedside approach to protecting kidney function and recognizing when supportive care is no longer enough [ MDster Editorial Team ](https://mdster.com/about) · Nov 12, 2026 · 5 min read · 58 [ Reviewed by Dr. Ali Ragab, MBBCH, MSc, MCAI ](https://mdster.com/medical-reviewers/dr-ali-ragab) [Editorial Policy](https://mdster.com/editorial-policy) \| [Corrections Policy](https://mdster.com/corrections) [ Internal Medicine ](https://mdster.com/blog?tag=internal-medicine) [ Nephrology ](https://mdster.com/blog?tag=nephrology) [ Medication Safety ](https://mdster.com/blog?tag=medication-safety) [ Acute Kidney Injury ](https://mdster.com/blog?tag=acute-kidney-injury) [ Dialysis ](https://mdster.com/blog?tag=dialysis) Share this article Share this post On this page 1. [ Optimize volume without prescribing fluid by reflex ](#optimize-volume-without-prescribing-fluid-by-reflex) 2. [ Decide whether the patient needs fluid, pressure, or fluid removal ](#decide-whether-the-patient-needs-fluid-pressure-or-fluid-removal) 3. [ Prevent the next kidney insult ](#prevent-the-next-kidney-insult) 4. [ Review every medication, then review it again ](#review-every-medication-then-review-it-again) 5. [ Know when supportive care is insufficient ](#know-when-supportive-care-is-insufficient) 6. [ Use AEIOU as a safety screen, not a numerical rule ](#use-aeiou-as-a-safety-screen-not-a-numerical-rule) 7. [ Apply the principles on the ward ](#apply-the-principles-on-the-ward) 8. [ Reassess as the clinical picture changes ](#reassess-as-the-clinical-picture-changes) 9. [ Key Takeaways ](#key-takeaways) 10. [ Conclusion ](#conclusion) 11. [ Frequently Asked Questions ](#blog-faqs) 12. [ References ](#references-heading) On this page 1. [ Optimize volume without prescribing fluid by reflex ](#optimize-volume-without-prescribing-fluid-by-reflex) 2. [ Decide whether the patient needs fluid, pressure, or fluid removal ](#decide-whether-the-patient-needs-fluid-pressure-or-fluid-removal) 3. [ Prevent the next kidney insult ](#prevent-the-next-kidney-insult) 4. [ Review every medication, then review it again ](#review-every-medication-then-review-it-again) 5. [ Know when supportive care is insufficient ](#know-when-supportive-care-is-insufficient) 6. [ Use AEIOU as a safety screen, not a numerical rule ](#use-aeiou-as-a-safety-screen-not-a-numerical-rule) 7. [ Apply the principles on the ward ](#apply-the-principles-on-the-ward) 8. [ Reassess as the clinical picture changes ](#reassess-as-the-clinical-picture-changes) 9. [ Key Takeaways ](#key-takeaways) 10. [ Conclusion ](#conclusion) 11. [ Frequently Asked Questions ](#blog-faqs) 12. [ References ](#references-heading) A patient admitted with pneumonia has a rising creatinine and falling urine output. The reflex is to order more fluid—but they now have crackles and increasing oxygen needs. In AKI, the dangerous question is not simply, “How do I improve the creatinine?” It is, “What is threatening this patient’s circulation, lungs, or electrolyte balance right now?” Optimize volume without prescribing fluid by reflex --------------------------------------------------- ### Decide whether the patient needs fluid, pressure, or fluid removal Assess blood pressure, perfusion, recent losses, fluid balance, weight, oxygen requirement, and signs of congestion. Use urine output and serial creatinine to follow the course, but remember that creatinine lags behind changes in kidney function. Check for a reversible cause, including urinary retention or obstruction, while treating the underlying illness. [\[1\]](#cite-1 "Reference [1]") If hypovolemia is likely, give isotonic crystalloid and reassess promptly. Look for improved perfusion rather than repeatedly giving fluid because urine output remains low. In sepsis, balanced crystalloid is generally preferred over 0.9% saline; use dynamic measures, such as a passive leg raise with a stroke-volume assessment when available, to guide further resuscitation. [\[2\]](#cite-2 "Reference [2]") Persistent hypotension after appropriate resuscitation calls for treatment of shock, not an endless fluid infusion. For septic shock, the 2026 Surviving Sepsis Campaign guidelines suggest norepinephrine as the first-line vasopressor. Conversely, a congested patient with AKI may need decongestion: consider a loop diuretic for clinically significant volume overload, but do not mistake increased urine output for kidney recovery. [\[3\]](#cite-3 "Reference [3]") > **Clinical Pearl:** Oliguria is a prompt to reassess perfusion and volume status—not an automatic order for saline or furosemide. Prevent the next kidney insult ------------------------------ ### Review every medication, then review it again Stop nonessential nephrotoxins, particularly NSAIDs, and reconsider aminoglycosides and other potentially toxic agents when effective alternatives exist. During hypovolemia or hypotension, temporarily holding an ACE inhibitor, ARB, or diuretic may be appropriate; do not label all of these drugs permanently contraindicated after AKI. Reassess their indications and restart plans as perfusion, potassium, and kidney function stabilize. [\[1\]](#cite-1 "Reference [1]") Dose-adjust essential medicines rather than simply discontinuing them. Review renally cleared antibiotics, anticoagulants, insulin, gabapentinoids, and other drugs whose accumulation can cause harm; use drug-specific guidance and pharmacist support. A reported eGFR is less reliable when creatinine is changing rapidly, so reassess dosing as kidney function evolves and use drug levels where indicated. [\[4\]](#cite-4 "Reference [4]") - **Do not undertreat infection:** Give timely, effective therapy, then adjust maintenance dosing and monitor exposure where appropriate. - **Do not use diuretics to “convert” AKI:** They can manage overload, but they do not treat the underlying kidney injury. - **Do not overlook potassium sources:** Review supplements, potassium-containing therapies, and drugs that impair potassium excretion. [\[5\]](#cite-5 "Reference [5]") Know when supportive care is insufficient ----------------------------------------- ### Use AEIOU as a safety screen, not a numerical rule Ask about urgent dialysis—more precisely, kidney replacement therapy (KRT)—whenever AKI develops dangerous complications. **AEIOU** organizes the bedside assessment: - **A — Acidosis:** Severe metabolic acidosis that cannot be adequately managed medically. - **E — Electrolytes:** Particularly severe or persistent hyperkalemia despite temporizing and potassium-removal measures. - **I — Ingestions:** Selected dialyzable poisonings, such as severe lithium or ethylene glycol poisoning; involve toxicology because indications depend on the exposure and clinical state. - **O — Overload:** Pulmonary edema or clinically consequential fluid overload refractory to medical management. - **U — Uremia:** Complications such as encephalopathy or pericarditis. [\[1\]](#cite-1 "Reference [1]") Treat immediate threats while arranging KRT. For hyperkalemia with ECG changes, stabilize the myocardium and shift potassium promptly; do not wait for dialysis access before starting emergency treatment. Escalate to nephrology and critical care early when complications are developing, even if the eventual decision to dialyze is uncertain. [\[1\]](#cite-1 "Reference [1]") > **Board-exam trap:** An isolated creatinine or BUN value is not an automatic dialysis indication. The patient’s trajectory, complications, and response to medical treatment matter more than a single threshold. [\[1\]](#cite-1 "Reference [1]") A patient with severe AKI but no urgent indication may be monitored closely rather than dialyzed immediately. In STARRT-AKI, an accelerated KRT strategy did not improve 90-day survival compared with a standard strategy in critically ill patients. That finding does **not** justify delaying KRT when a life-threatening indication is present. [\[6\]](#cite-6 "Reference [6]") Apply the principles on the ward -------------------------------- ### Reassess as the clinical picture changes For the patient with pneumonia, rising oxygen needs, and crackles, pause before ordering another bolus. Recheck perfusion and congestion, review fluid given, measure potassium and acid–base status, and inspect the medication list. Treat sepsis and hypotension, but if pulmonary edema progresses despite appropriate management, discuss KRT urgently. [\[3\]](#cite-3 "Reference [3]") ### Key Takeaways - Match fluid treatment to **current perfusion and congestion**, then reassess its effect. - Remove avoidable nephrotoxins and repeatedly adjust essential drug doses as kidney function changes. - Use loop diuretics for significant overload, not to claim kidney recovery. - Escalate refractory AEIOU complications urgently; do not wait for an arbitrary creatinine threshold. [\[1\]](#cite-1 "Reference [1]") Conclusion ---------- Good AKI management is active, repeated bedside decision-making. Restore perfusion when it is inadequate, avoid adding preventable injury, and recognize promptly when medical treatment cannot control a dangerous complication. Frequently Asked Questions ---------------------------- ### Should every patient with oliguria and AKI receive an IV fluid bolus? No. Assess perfusion, fluid losses, and congestion first. Give crystalloid when hypovolemia is likely, then reassess; additional fluid may harm a patient with overload. ### Does a loop diuretic help the kidneys recover from AKI? No. A loop diuretic can treat clinically significant fluid overload, but increased urine output alone does not demonstrate kidney recovery. ### When should I call nephrology about dialysis in AKI? Call urgently for severe or refractory hyperkalemia, acidosis, fluid overload, or uremic complications, and for selected serious dialyzable poisonings. Escalate while providing immediate medical treatment. ### Can I use the reported eGFR to dose medications during rapidly changing AKI? Use caution: creatinine-based estimates are less reliable before kidney function reaches a steady state. Reassess doses frequently, follow drug-specific guidance, and use therapeutic drug monitoring when indicated. References (6) ------------------ 1. 1. [ NICE. Acute kidney injury: prevention, detection and management (NG148). Updated 2024. ](https://www.nice.org.uk/guidance/ng148/chapter/Recommendations) [↩](#cite-ref-1-1 "Back to text") 2. 2. [ kdigo.org/wp-content/uploads/2016/10/KDIGO-2012-AKI-Guideline-English.pdf ](https://kdigo.org/wp-content/uploads/2016/10/KDIGO-2012-AKI-Guideline-English.pdf) [↩](#cite-ref-2-1 "Back to text") 3. 3. [ Surviving Sepsis Campaign. International Guidelines for Management of Sepsis and Septic Shock 2026. ](https://www.sccm.org/clinical-resources/guidelines/guidelines/surviving-sepsis-campaign-international-guidelines-for-management-of-sepsis-and-septic-shock-2026) [↩](#cite-ref-3-1 "Back to text") 4. 4. [ KDIGO. Clinical Practice Guideline for the Evaluation and Management of Chronic Kidney Disease: medication dosing when GFR is not at steady state. 2024. ](https://kdigo.org/wp-content/uploads/2024/03/KDIGO-2024-CKD-Guideline.pdf) [↩](#cite-ref-4-1 "Back to text") 5. 5. [ KDIGO Acute Kidney Injury Work Group. Clinical Practice Guideline for Acute Kidney Injury. Kidney International Supplements. 2012. ](https://kdigo.org/wp-content/uploads/2019/01/KDIGO-2012-AKI-Guideline-English.pdf) [↩](#cite-ref-5-1 "Back to text") 6. 6. [ STARRT-AKI Investigators. Timing of Initiation of Renal-Replacement Therapy in Acute Kidney Injury. New England Journal of Medicine. 2020. ](https://pubmed.ncbi.nlm.nih.gov/32668114/) [↩](#cite-ref-6-1 "Back to text") Next step Turn reading into Internal Medicine performance ------------------------------------------------- - System‑based, exam‑style questions + explanations - Smarter review to reinforce weak topics - Build confidence with measurable progress [ Start practicing ](https://mdster.com/user/dashboard) [ Explore Internal Medicine ](https://mdster.com/speciality/internal-medicine) [ View pricing ](https://mdster.com/pricing) [ Explore features ](https://mdster.com/features) No credit card required. Full access to all features\*. No commitment. Cancel anytime. \*AI SOE Examiner is limited to 10 cases monthly for Advanced & Bundle subscribers. 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