What is Acute Kidney Injury (AKI)?
Acute Kidney Injury (AKI), previously called acute renal failure, is a sudden and rapid decrease in kidney function that occurs over hours to days. Unlike chronic kidney disease which develops gradually over months and years, AKI happens quickly — often without warning — and can be life-threatening if not treated promptly. However, unlike CKD, AKI is often reversible with timely and appropriate treatment, especially if identified early.
AKI is defined medically as a rise in serum creatinine of 0.3 mg/dL or more within 48 hours, or a 1.5 times or greater rise from baseline within 7 days, or a reduction in urine output to less than 0.5 mL/kg/hour for 6+ hours. In practical terms, this means the kidneys are suddenly struggling or failing to filter blood adequately.
Dr. Swaranjeet Kaur at the Advanced Renal and Critical Care Unit of Pragma Medical Institute, Bathinda, manages AKI patients from across Punjab with intensive monitoring and expert nephrology care.
3 Categories of AKI Causes
1. Pre-Renal AKI — Reduced Blood Flow to Kidneys
The kidneys are receiving insufficient blood to filter. This is the most common type of AKI and is often reversible with prompt fluid resuscitation:
- Severe dehydration (vomiting, diarrhea, excessive sweating, poor intake)
- Major blood loss from surgery, trauma, or internal bleeding
- Severe heart failure — heart not pumping enough blood to kidneys
- Severe infection/septic shock — blood pressure crashes dramatically
- Liver failure (hepatorenal syndrome)
- Burns — massive fluid loss
2. Intrinsic (Intra-Renal) AKI — Direct Kidney Damage
The kidney tissue itself is damaged:
- Acute tubular necrosis (ATN) — the most common cause; often from prolonged pre-renal AKI or nephrotoxic drugs
- Nephrotoxic medications — NSAIDs (painkillers), aminoglycoside antibiotics (gentamicin), contrast dyes from CT scans, certain cancer chemotherapy drugs
- Acute glomerulonephritis — immune inflammation of the glomeruli
- Vasculitis — inflammation of kidney blood vessels
- Myoglobinuria — muscle breakdown (from crush injuries, severe exercise, snake bites)
3. Post-Renal AKI — Urinary Tract Obstruction
Blockage of urine outflow causing back-pressure that damages kidneys:
- Kidney stones causing ureteric obstruction
- Enlarged prostate (BPH) — very common in older men
- Bladder cancer or tumors compressing ureters
- Strictures of the ureter or urethra
Warning Signs and Symptoms of AKI
URGENT: Seek Emergency Care Immediately For:
Sudden severe reduction in urine output; inability to urinate; severe breathlessness from fluid accumulation in lungs; confusion, drowsiness, or seizures; sudden severe leg/face swelling; chest pain or irregular heartbeat (from high potassium).
- Markedly reduced urine output (oliguria — less than 400mL/day) or complete absence of urine (anuria)
- Sudden rapid swelling in legs, ankles, and face
- Breathlessness — from fluid accumulating in lungs (pulmonary oedema)
- Fatigue, confusion, drowsiness (from waste product accumulation)
- Nausea and vomiting
- Chest pain or palpitations (from dangerous high potassium)
- Rapidly rising creatinine on blood tests
AKI Stages (KDIGO Classification)
| AKI Stage | Creatinine Criteria | Urine Output Criteria | Urgency |
|---|---|---|---|
| Stage 1 | 1.5-1.9x baseline OR ≥0.3 mg/dL rise | <0.5 mL/kg/hr for 6-12 hrs | Urgent |
| Stage 2 | 2.0-2.9x baseline | <0.5 mL/kg/hr for ≥12 hrs | Very Urgent |
| Stage 3 | ≥3x baseline OR ≥4.0 mg/dL | <0.3 mL/kg/hr for ≥24 hrs or anuria for ≥12 hrs | Emergency |
How AKI is Treated at Pragma Medical Institute, Bathinda
1. Identifying and Treating the Underlying Cause
Treatment of AKI begins with identifying why the kidneys failed. Pre-renal AKI responds to aggressive IV fluid administration. Post-renal AKI requires relief of obstruction (ureteric stenting, catheterization, or emergency surgery). Intrinsic AKI requires stopping nephrotoxic drugs and treating the specific kidney disease.
2. Fluid and Electrolyte Management
Careful monitoring and correction of fluid balance, sodium, potassium, bicarbonate, and phosphorus is essential. Dangerous high potassium (hyperkalemia) causing ECG changes requires emergency treatment with calcium gluconate, insulin-glucose, and sometimes emergency dialysis.
3. Emergency Dialysis (when needed)
Dialysis is initiated in AKI when there is: dangerous potassium levels not responding to medicines, severe metabolic acidosis, pulmonary oedema (fluid in lungs), severe uremia causing confusion or seizures, or rapidly worsening kidney function. AKI dialysis is often temporary — once the underlying cause resolves, kidney function may recover and dialysis can be stopped.
4. Intensive Monitoring
AKI patients require daily or twice-daily blood tests (creatinine, electrolytes, blood counts), strict intake-output monitoring, daily weight measurements, blood pressure monitoring, and ECG monitoring in severe cases.
Preventing AKI — Key Protective Measures
- Maintain good hydration — especially during illness, heat waves, and exercise
- Avoid NSAIDs (painkillers) in dehydrated patients or those with kidney disease
- Tell radiologists about kidney disease before any CT scan with contrast
- Use antibiotics only as prescribed — never self-medicate with nephrotoxic antibiotics
- Monitor kidney function regularly if you have diabetes, hypertension, or CKD
- Treat infections promptly to prevent septic shock
- Seek immediate care for severe diarrhea, vomiting, or inability to keep fluids down
Suspected AKI? Get Emergency Kidney Care in Bathinda
AKI is a medical emergency. If your creatinine has risen suddenly, urine output has dropped, or you have any of the warning signs above, seek immediate care at Pragma Medical Institute, Bathinda under Dr. Swaranjeet Kaur's expert nephrology team.
Book Emergency Consultation Call: 9056248509