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Response to frusemide in critically ill patients requiring dialysis

Frusemide stress test responsiveness in critically ill patients requiring continuous renal replacement therapy patients (FST-CRRT): a feasibility study

Status
Recruiting
Phases
Phase 1
Study type
Interventional
Source
ANZCTR
Registry ID
ACTRN12625001227482
Acronym
FST-CRRT
Enrollment
15
Registered
2025-11-05
Start date
2024-12-11
Completion date
2026-01-31
Last updated
2025-11-10

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

None listed

Brief summary

The administration of furosemide (a diuretic drug designed to increase production of urine) has been shown to predict a critically ill patient's requirement for dialysis (CRRT). This has been termed the frusemide stress test (FST). Critically ill patients often require dialysis in ICU for severe injury to the kidneys. There is a large amount of evidence around when to start, however there is little to guide clinicians on when the optimal time to stop dialysis is. This is important as whilst dialysis may be life saving, once the kidneys have started to recover it can result in harm. We aim to seek the proportion of patients who respond to the FST and identify whether a future randomised trial to aid clinicians in stopping dialysis at an appropriate time is feasible.

Interventions

The administration of a single dose of intravenous frusemide will be administered at 1mg/kg (or 1.5mg/kg if received frusemide in the past seven days). The intervention will be administered as soon as practically possible once all inclusion criteria are met and with agreement from the treating intensivist. Medication charts will be reviewed to confirm administration.

Sponsors

St Vincent's Hospital, Melbourne
Lead SponsorHospital

Study design

Allocation
Non-randomised trial
Intervention model
Single group
Primary purpose
Treatment
Masking
Open (masking not used)

Eligibility

Sex/Gender
All
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

• Patients admitted to ICU • Age greater than or equal to 18 years • Severe Acute Kidney Injury (AKI) requiring CRRT or < 12 hours since CRRT paused • CRRT duration greater than 24 hours • Metabolic stability (defined as pH greater than 7.35, Potassium less than 5.5 mmol/L, Urea less than 30 mmol/L) • Euvolaemia and stable/improving haemodynamic requirements as determined by clinical assessment and hemodynamic measurements • Urine Output of at least 10mls per hour in the preceding 3 hours (total of 30mls/3hours)

Exclusion criteria

• Known anaphylaxis or severe allergy to frusemide • Met all inclusion criteria more than 24 hours prior • History of end-stage renal failure with prior dialysis • Non-renal indication for ongoing CRRT e.g. toxin • Death or withdrawal of active treatment while on CRRT • Planned transfer to another acute hospital within 7 days • Clinician assessment that study is not in patient’s best interest • Pregnancy or Breastfeeding • Urine output greater than 50mls per hour for 3 or more hours (total 150mls/3 hours)

Outcome results

None listed

Source: ANZCTR · Data processed: Feb 4, 2026