Acute kidney injury, commonly abbreviated as AKI, is a sudden decline in kidney function that can develop over hours or days. Unlike chronic kidney disease, which usually develops over a longer period, AKI can sometimes be reversible when its underlying cause is identified and treated promptly.

AKI can occur during severe infections, dehydration, blood loss, urinary obstruction, certain medical conditions or after exposure to medicines that affect the kidneys. The appropriate treatment depends primarily on why the kidney function has suddenly deteriorated.

At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke, super specialist nephrologist and transplant physician, provides specialist evaluation and management for acute kidney injury and other kidney conditions.

What is acute kidney injury?

AKI occurs when the kidneys suddenly become less effective at filtering waste and maintaining fluid and electrolyte balance.

It may lead to:

• Increased blood creatinine
• Reduced urine production
• Fluid accumulation
• Electrolyte abnormalities
• Changes in acid and base balance
• Accumulation of waste products in the blood

AKI can range from a mild temporary change in kidney function to a severe condition requiring intensive medical treatment.

What causes AKI?

Identifying the cause is one of the most important parts of AKI treatment.

Dehydration and low blood flow

Severe vomiting, diarrhea, excessive fluid loss, bleeding or other conditions that reduce blood circulation to the kidneys can contribute to AKI.

Severe infections

Serious infections, particularly those associated with widespread inflammation or low blood pressure, can impair kidney function.

Certain medicines

Some medicines can affect kidney function in susceptible individuals. The risk may be higher when a person is dehydrated or already has kidney disease.

Urinary obstruction

A blockage preventing urine from leaving the kidneys can cause acute kidney dysfunction.

Potential causes include:

• Kidney stones
• Enlarged prostate
• Urinary tract obstruction
• Certain tumors or structural abnormalities

Kidney inflammation

Conditions affecting the kidney's filtering structures or interstitial tissue can cause AKI.

Major surgery or serious illness

Complex surgery, trauma and severe medical conditions can sometimes contribute to acute kidney injury.

What are the symptoms of AKI?

Symptoms can vary depending on the severity and cause.

Possible signs include:

• Reduced urine output
• Swelling of the feet, ankles or face
• Fatigue
• Nausea
• Vomiting
• Breathlessness
• Confusion
• Drowsiness
• Changes in blood pressure
• Flank or abdominal discomfort in some cases

Some people may have very few symptoms, with AKI discovered through blood tests performed during another illness.

Is reduced urine always present in AKI?

No.

Some forms of AKI occur with significantly reduced urine output, while others may occur despite relatively normal urine production.

Therefore, normal urine output does not completely exclude acute kidney injury.

How is AKI diagnosed?

Doctors generally combine clinical assessment with laboratory testing.

Serum creatinine

Creatinine is a key blood marker used to assess changes in kidney filtration.

A rise compared with a person's previous baseline can be an important indicator of AKI.

Blood electrolyte testing

AKI can cause changes in:

• Potassium
• Sodium
• Bicarbonate
• Other metabolic parameters

Significant abnormalities may require urgent treatment.

Urine examination

Urine testing can provide clues about possible causes, including blood, protein, infection or other abnormalities.

Ultrasound

Kidney and urinary tract ultrasound can help identify obstruction, changes in kidney structure and other possible causes.

Additional tests

Depending on the suspected diagnosis, doctors may order additional blood tests, imaging or specialized investigations.

What is the treatment for AKI?

There is no single medicine that treats every case of AKI.

The most effective treatment is usually directed at the underlying cause.

Correcting dehydration

If fluid loss is responsible, appropriate fluid replacement may help restore circulation to the kidneys.

However, excessive fluid can be harmful in some patients, particularly those with heart or advanced kidney problems. Fluid treatment therefore needs to be individualized.

Treating infections

When infection contributes to AKI, appropriate treatment of the infection is essential.

Removing urinary obstruction

If AKI results from a blockage, restoring urine flow may be an important part of treatment.

Depending on the cause, this may involve a urinary catheter, ureteric stent, nephrostomy or another procedure.

Reviewing medicines

Doctors may temporarily stop, adjust or replace medicines that could be contributing to kidney injury, depending on the patient's clinical situation.

Never stop essential medicines without medical guidance.

Managing electrolyte abnormalities

AKI can cause potentially dangerous changes in potassium and other electrolytes.

These abnormalities may require medication, dietary measures or urgent hospital treatment.

Managing fluid overload

If the kidneys cannot remove enough fluid, swelling and breathlessness can develop.

Treatment may involve fluid and salt management, medicines or other interventions depending on the severity.

When is dialysis needed for AKI?

Not every patient with AKI requires dialysis.

Temporary dialysis or another form of kidney replacement therapy may be considered when severe AKI causes complications that cannot be adequately controlled with other treatment.

Possible indications can include:

• Severe potassium abnormalities
• Significant metabolic acidosis
• Fluid overload causing serious breathing problems
• Severe accumulation of waste products
• Certain toxin exposures
• Other serious complications

The decision is based on the patient's overall clinical condition rather than a creatinine value alone.

Can AKI be completely cured?

Many cases of AKI can improve substantially, especially when the underlying cause is identified early and treated appropriately.

Recovery can vary significantly.

Some people recover kidney function completely, while others may have:

• Partial recovery
• Persistent reduction in kidney function
• Increased risk of future chronic kidney disease

Follow-up after AKI can therefore be important even when the initial illness has resolved.

AKI recovery after hospital treatment

Recovery may continue after discharge.

Your doctor may recommend monitoring:

• Serum creatinine
• eGFR
• Urine protein
• Blood pressure
• Electrolytes
• Fluid status

The timing and frequency of these tests depend on the severity of AKI and the patient's underlying health.

Can AKI become chronic kidney disease?

Yes, in some cases.

Although AKI is a sudden condition, significant kidney injury can increase the risk of developing or worsening chronic kidney disease.

This is one reason follow-up kidney testing is important after an episode of AKI.

Who is at higher risk of AKI?

AKI is more likely in people with certain risk factors, including:

• Older age
• Existing chronic kidney disease
• Diabetes
• Heart disease
• Severe infection
• Dehydration
• Major surgery
• Certain medications
• Urinary obstruction
• Previous episodes of AKI

People with these risk factors may require closer monitoring during serious illnesses.

How can AKI risk be reduced?

Not every episode of AKI can be prevented, but several measures may help reduce risk.

Maintain appropriate hydration

During illnesses involving vomiting, diarrhea or fever, discuss fluid management with a healthcare professional, particularly if you have heart or kidney disease.

Avoid unnecessary self medication

Frequent or inappropriate use of certain pain medicines can increase kidney risk in susceptible individuals.

Manage diabetes and blood pressure

Good control of underlying conditions can help maintain kidney health.

Tell healthcare professionals about kidney problems

If you already have kidney disease, inform doctors before starting new medicines or undergoing certain procedures.

Seek treatment for serious infections

Prompt medical evaluation of severe infection can reduce the risk of complications.

When should AKI be treated urgently?

Acute kidney injury can become serious quickly.

Seek urgent medical care if there is:

• Very little or no urine
• Severe swelling
• Difficulty breathing
• Confusion or extreme drowsiness
• Persistent vomiting
• Severe weakness
• Chest discomfort
• Severe illness with rapidly changing symptoms

AKI may require hospital monitoring depending on its severity and cause.

AKI treatment at Prabhakar Bhurke Clinic

At Prabhakar Bhurke Clinic, Dr. Sandip Prabhakar Bhurke provides specialist evaluation for patients with suspected or confirmed acute kidney injury.

Assessment may involve:

• Review of previous kidney function
• Blood and urine testing
• Medication review
• Evaluation for dehydration or infection
• Assessment for urinary obstruction
• Kidney imaging when appropriate
• Monitoring of electrolytes
• Management of fluid balance
• Evaluation of the need for kidney replacement therapy
• Follow-up after kidney function begins to recover

Treatment is individualized according to the cause, severity of kidney injury and overall health of the patient.

Frequently Asked Questions

What is the best treatment for AKI?

The best treatment depends on the cause. Treatment may involve correcting dehydration, treating infection, relieving urinary obstruction, adjusting medicines or managing complications.

How long does AKI take to recover?

Recovery varies. Some patients improve within days, while others may require weeks or longer. Severe AKI can result in incomplete recovery.

Does AKI always require dialysis?

No. Dialysis is used only when severe kidney dysfunction causes complications that require kidney replacement therapy.

Can drinking more water cure AKI?

Not necessarily. Some AKI cases are related to dehydration, but excessive fluid can be dangerous when the kidneys cannot remove fluid effectively. Fluid intake should be guided by the underlying cause and medical condition.

Can AKI happen in someone who previously had normal kidneys?

Yes. Acute kidney injury can occur even in people without previously known kidney disease, particularly during severe illness, dehydration, infection, obstruction or exposure to kidney-injuring factors.

Conclusion

AKI treatment depends on quickly identifying and addressing the reason for the sudden decline in kidney function. Management may involve fluids, infection treatment, medication adjustments, relief of urinary obstruction, electrolyte management or, in severe cases, temporary dialysis.

Because AKI can sometimes progress rapidly, reduced urine output, severe swelling, breathing difficulty, confusion or other serious symptoms should receive prompt medical attention.

Early diagnosis and appropriate treatment can improve the possibility of kidney recovery. Follow-up after AKI is also important because some patients remain at increased risk of chronic kidney problems.

For specialist evaluation and personalized kidney care, consult Dr. Sandip Prabhakar Bhurke at Prabhakar Bhurke Clinic.

Medical Disclaimer

This article is provided for general educational and informational purposes only and is not a substitute for professional medical advice, diagnosis or treatment. Acute kidney injury can have many causes and may become serious quickly. Treatment must be determined according to the underlying cause, kidney function, fluid status, laboratory results and overall health. Do not self-treat AKI by changing fluid intake or stopping medicines without medical supervision. Seek urgent medical attention for markedly reduced urine output, severe breathlessness, confusion, persistent vomiting, severe swelling or rapidly worsening illness. For individualized evaluation and treatment, consult Dr. Sandip Prabhakar Bhurke or another qualified nephrologist.