Will Dialysis Be Permanent After HFRS Kidney Injury?

Hearing that you or a loved one needs dialysis is terrifying, but for the majority of patients, needing dialysis during Hemorrhagic Fever with Renal Syndrome (HFRS) is a temporary supportive measure.

While HFRS can cause severe acute kidney injury (a sudden decline in kidney function), this is usually very different from chronic kidney disease that permanently destroys the kidneys ^[1]. The exact timeline for your recovery will depend on the specific type of hantavirus, the severity of your illness, your age, and your baseline kidney health before getting sick. However, most patients with HFRS recover enough kidney function to safely stop dialysis ^[2].

To understand why this is usually temporary, it helps to understand the typical phases of kidney injury and recovery during HFRS.

When Dialysis May Be Needed (The Oliguric Phase)

During the severe acute phase of HFRS, blood vessel changes and inflammation can temporarily impair the kidneys’ ability to filter blood ^[1]. This often leads to an oliguric phase, where urine output drops significantly.

However, dialysis is not started simply because urine output is low. Your medical team looks at the entire clinical picture and may start temporary dialysis to manage life-threatening complications while the kidneys cannot do their job, such as:

• Dangerous buildups of potassium or acid in the blood
• Severe fluid overload that affects breathing (fluid in the lungs)
• An inability to control overall waste and fluid balance

Depending on how stable your blood pressure is, doctors may use standard intermittent hemodialysis, or continuous renal replacement therapy (CRRT), a gentle, continuous form of dialysis often used for patients in intensive care ^[2]. Dialysis during this time is a crucial bridge—doing the work of the kidneys to keep you safe while your body fights the virus.

The Diuretic Phase and Stopping Dialysis

As the initial injury heals, patients usually transition into a diuretic phase, where the kidneys begin recovering and often produce very large amounts of urine ^[3].

While it is encouraging to see the kidneys making urine again, this phase requires close medical monitoring. The kidneys cannot yet concentrate urine normally, meaning the high urine output can lead to dehydration, dangerously low blood pressure, and severe electrolyte imbalances ^[3]. Do not restrict or increase your fluid intake during this time without direct instructions from your medical team. They will carefully manage your fluids and electrolytes through IVs or specific drinks.

As you progress through this phase, your medical team will frequently test your blood and urine to determine if dialysis can be paused or stopped safely. This decision relies on seeing sustained clearance of waste, safe potassium and acid levels, and stable fluid balance—not just an increase in urine output.

Long-Term Kidney Health and Follow-Up

Although needing lifelong kidney replacement therapy is uncommon after HFRS, your kidneys have endured a serious, temporary injury and will need long-term care. Recovery takes weeks to months, and kidney function may not return completely to your pre-illness baseline.

• Standard Monitoring: After discharge, you will need structured follow-up. Doctors will track your recovery using standard blood tests (like creatinine or eGFR to estimate your filtering rate), check your urine for protein (albumin), and monitor your blood pressure.
• Additional Tests: In some cases, doctors may use more sensitive blood markers, such as cystatin C, to detect subtle, lingering kidney issues if standard tests leave questions ^[4].
• Long-Term Residual Effects: Long-term follow-up studies show that some HFRS survivors may have mild, lingering kidney dysfunction or low-grade inflammation (a research term for a slightly elevated immune response) years after the initial infection ^[5].
• Atypical Cases: Only in rare, atypical cases where recovery stalls might doctors consider a kidney biopsy to look for specific physical damage (like glomerular lesions), which can indicate a higher risk for long-term kidney issues ^[6]. Biopsies are generally avoided during the acute illness due to bleeding risks.

Your primary care doctor or a nephrologist (kidney specialist) will create a personalized monitoring schedule for you. By following their guidance and attending all follow-up appointments, you can protect your healing kidneys and address any mild residual issues early.