Using furosemide to assess kidney recovery in critically ill patients on dialysis

A Protocol Based-Furosemide Stress Test to Evaluate Renal Recovery During Continuous Renal Replacement Therapy (FST-STOP): A Randomized Controlled Trial

Phase 4 Interventional Chiang Mai University · NCT06229990

This study is testing if a special kidney stress test using furosemide can give better information about kidney recovery for critically ill adults on dialysis compared to standard care.

Quick facts

PhasePhase 4
Study typeInterventional
Enrollment80 (estimated)
Ages20 Years and up
SexAll
SponsorChiang Mai University Academic / other
Locations1 site (Chiang Mai)
Trial IDNCT06229990 on ClinicalTrials.gov

What this trial studies

This clinical trial compares the effectiveness of a furosemide stress test (FST) against standard care in evaluating renal recovery in critically ill patients undergoing continuous renal replacement therapy (CRRT) for acute kidney injury. The study aims to determine if the FST can provide better insights into kidney function recovery compared to traditional methods. Participants will be adults with stage 3 acute kidney injury who have been on CRRT for at least 48 hours. The trial seeks to address the lack of evidence regarding the timing of withholding CRRT and its associated complications.

Who should consider this trial

Good fit: Ideal candidates are adults aged 20 and older with stage 3 acute kidney injury and oliguria who are receiving CRRT in an intensive care setting.

Not a fit: Patients with certain exclusions such as severe electrolyte imbalances, previous chronic kidney disease stage 5, or those on inotropic drugs may not benefit from this study.

Why it matters

Potential benefit: If successful, this approach could lead to improved assessment of kidney recovery and potentially reduce complications associated with prolonged CRRT.

How similar studies have performed: While the use of furosemide stress tests has been explored in other contexts, this specific application in critically ill patients undergoing CRRT is relatively novel.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Adult 20 year of age or older
* Acute kidney injury (AKI) stage 3 according to Kidney Disease Improving Global Outcomes (KDIGO) classification with oliguria (urine \<400 ml/day)
* Initiate CRRT in ICU (medical ICU, surgical ICU, cardiac care unit) for at least 48 hours (time for initiation and modality of CRRT can adjust by clinician)

Exclusion Criteria:

* Use any inotropic drug (norepinephrine, epinephrine, dopamine, dobutamine)
* Blood urea nitrogen (BUN) \>80 mg/dL
* Serum K \<3.5 or \>5 mmol/L
* Arterial potential of Hydrogen (pH) \<7.3
* Serum bicarbonate (HCO3) \<15 mmol/L
* Urine volume \<400 or \>2,100 mL/day
* Urine creatinine clearance (CrCl) at 6 hours \>20 mL/min
* Previous chronic kidney disease (CKD) stage 5 or estimated glomerular filtration rate (eGFR) \<15 mL/min/1.73 m2
* Previous RRT within 14 days
* Kidney transplantation
* Obstructive etiology for AKI
* Toxin/drug that necessitates RRT
* Allergy to furosemide
* Moribund with expected death within 24 hours
* Pregnancy

Where this trial is running

Chiang Mai

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Acute Kidney InjuryAcute kidney injuryContinuous renal replacement therapyFurosemide stress testCritical careCRRT
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.