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Acute Kidney Injury
Urgent
Acute kidney injury is a sudden decline in kidney function that develops over hours or days. The kidneys may temporarily lose their ability to remove waste products and maintain normal fluid, electrolyte, and acid balance. Causes include severe dehydration, infection, reduced blood flow, urinary obstruction, and certain medicines or other kidney-injuring substances.
Body System
Kidneys & Urinary Tract
When to Seek Medical Attention
Acute kidney injury requires prompt medical assessment because kidney function can deteriorate quickly. Seek urgent care for markedly reduced or absent urination, severe swelling, persistent vomiting, confusion, severe weakness, shortness of breath, chest pain, or rapidly worsening symptoms. Severe breathing difficulty, altered consciousness, or other signs of serious complications require emergency care.
Symptoms
3
Causes
2
Treatments
5
Diet
3
Overview
Acute kidney injury is a sudden decline in kidney function that develops over hours or days. The kidneys may temporarily lose their ability to remove waste products and maintain normal fluid, electrolyte, and acid balance. Causes include severe dehydration, infection, reduced blood flow, urinary obstruction, and certain medicines or other kidney-injuring substances.
Symptoms 3
Fatigue
Urinary Incontinence
Urinary Retention
Causes 2
Acute kidney injury may occur when blood flow to the kidneys falls, when kidney tissue is directly damaged, or when urine flow is obstructed. Severe dehydration, blood loss, shock, sepsis, heart problems, certain medicines, toxins, and contrast exposure can reduce kidney function. Kidney stones, enlarged prostate, tumors, or other blockages can cause obstructive injury.
Chronic Disease
Kidney Disease
Risk Factors
Risk is increased by older age, chronic kidney or heart disease, diabetes, severe infection, dehydration, major surgery, blood loss, low blood pressure, urinary obstruction, and exposure to medicines or substances that can injure the kidneys. Hospitalized and critically ill patients are particularly vulnerable. The risk depends on the severity and duration of the underlying problem.
Diagnosis
Diagnosis is based on a patient's medical history,
symptoms, physical examination and, when necessary,
laboratory or imaging investigations.
Diagnosis involves identifying a sudden change in kidney function through blood and urine tests. Serum creatinine and urine output are important measures. Healthcare professionals may examine urine for blood, protein, infection, or other abnormalities and may use ultrasound or other imaging when obstruction is suspected. The medical history helps identify dehydration, infection, medicines, toxins, or other potential causes.
Prevention
Key Prevention Tips
Preventing dehydration, promptly treating serious infections, maintaining appropriate blood pressure and circulation, and avoiding unnecessary exposure to kidney-injuring medicines can reduce risk
People taking medicines that may affect kidney function may require monitoring, particularly during illness or dehydration
Urinary obstruction should be evaluated promptly
Individuals with chronic medical conditions should follow their treatment and monitoring plans
Prevention Guidance
Preventing dehydration, promptly treating serious infections, maintaining appropriate blood pressure and circulation, and avoiding unnecessary exposure to kidney-injuring medicines can reduce risk. People taking medicines that may affect kidney function may require monitoring, particularly during illness or dehydration. Urinary obstruction should be evaluated promptly. Individuals with chronic medical conditions should follow their treatment and monitoring plans.
Reminder: Prevention recommendations should be tailored to your personal health status and risk factors.
Treatment & Management 5
Detailed treatment guidance is currently being prepared.
Detailed treatment guidance is currently being prepared.
Detailed treatment guidance is currently being prepared.
Detailed treatment guidance is currently being prepared.
Detailed treatment guidance is currently being prepared.
Medical Note: The treatment information provided is intended for educational purposes only.
Always consult a qualified healthcare professional before starting,
stopping, or changing any treatment.
Diet & Nutrition 3
Recommended Foods
Adequate Fluids
Maintain hydration when medically appropriate.
Low Sodium Diet
May reduce fluid overload.
Fresh Fruits
Provide essential nutrients.
Foods to Avoid
Excess Salt
May worsen kidney stress.
Processed Foods
Often contain excess sodium.
Medical Nutrition Note: Diet recommendations are intended for general educational purposes and should be tailored to individual health needs by a qualified healthcare professional.
Frequently Asked Questions 5
It is a sudden decline in kidney function.
Dehydration, infections, and certain medicines are common causes.
Reduced urine output and swelling may occur.
Blood tests and urine tests are commonly used.
Many patients recover if treated promptly.
Helpful Tip: These answers provide general medical information.
Consult your healthcare provider for advice tailored to your condition.