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Fluid Balance Guided by Modified Venous Excess Ultrasonography Versus Standard Care in Patients With Acute Kidney Injury Receiving Continuous Renal Replacement Therapy

Sponsor: Chulalongkorn University • ClinicalTrials.gov ID: NCT07346118

Registry updated: 2026-10-05

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Description

The goal of this randomised controlled trial is to compare the cumulative fluid balance over the first 72 h following inclusion guided by mVExUS versus standard of care in critically ill patients with acute kidney injury receiving CRKT . It will also compare the proportion of CRRT-related complications-including intradialytic hypotension and arrhythmias-between patients managed with mVExUS-guided fluid management and those receiving standard care. The main questions it aims to answer are: Does fluid removal rate guided by mVExUS will reduce cumulative fluid balance over the course of the first 72 h of CRRT in ICU patients compared to standard care Participants will: Get fluid assessment by mVExUS protocol or a strandard care every 8 hours for 72 hours

Interventions

mVExUS-guided fluid management (Procedure)
In the intervention arm, mVExUS has to be performed every 24 hours until 72 hours after enrollment. Participants with profile A will have UFNET 0 mL/hr with target fluid balance 0 to +500 mL/day. Patients with profile B will have UFNET 0-20 mL/hr with target fluid balance 0 to -500 mL/day. Patients with profile C will have UFNET 20-40 mL/hr with target fluid balance -500 to -1000 mL/day. Patients with profile D will have UFNET 40-100 mL/hr with target fluid balance neg \>1000 mL/day. This intervention will be combined with serial lactate monitoring in which lactate levels will be measured every 8 h. When the lactate level rises more than 2 or if there is presence of HIRRT (tachycardia, hypotension, mottling or drop in cardiac index), passing leg raising or mini-fluid challenge (crystalloid fluid bolus 200 mL) will be performed to assess fluid responsiveness. If there is fluid responsiveness, UFNET will be stopped. Once lactate is normalized or episode of HIRRT resolved, the UFNET strat

Eligibility criteria

Inclusion Criteria: * Adults (≥ 18 years of age) * Admitted to ICU * Acute kidney injury by KDIGO criteria * Initiated CRRT by at least one of the following indications for RRT initiation: * Serum potassium ≥ 6.0 mmol/L, or * pH ≤ 7.20 or serum bicarbonate ≤ 12 mmol/L, or * Evidence of severe respiratory failure, based on a PaO2/FiO2 ≤ 200 and clinical perception of volume overload, or * Persistent severe AKI (sCr remains \> 50% the value recorded at randomization) for \> 72 hours from randomization * Participants giving informed consent Exclusion Criteria: * Refuse to participate * Previous diagnosis of end-stage kidney disease (ESKD) currently on kidney replacement therapy * Kidney transplant recipient * Receive RRT before ICU admission within 90 days * Structural kidney diseases which will interfere with intrarenal doppler ultrasound e.g. renal artery stenosis, autosomal dominant polycystic kidney disease * Patients with previously known conditions that interfere with portal doppler assessment, namely liver cirrhosis, severe tricuspid regurgitation with structural heart disease or massive ascites. * Underlying disease process with a life expectancy less than 90 days * Pregnancy * Severe cardiac rhythm disturbances (tachyarrhythmia, supraventricular tachycardia) * Intra-cardiac shunts; Ventricle septal defect, patent foramen ovale, atrial septal defect * Aortic aneurysm * Intra-abdominal hypertension (intraabdominal pressure ≥20 mmHg) * Expected life expectancy \<48 hours * Receiving extracorporeal membrane oxygenation (ECMO)

Conditions

AKI - Acute Kidney Injury Fluid Balance Acute Circulatory Failure Continuous Renal Replacement Therapy (CRRT) VExUS Passive Leg Raising Biomarkers / Blood

Locations

Vajira Hospital, Navamindradhiraj University — Bangkok, Thailand
King Chulalongkorn Memorial Hospital — Bangkok, Thailand

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Official Source

Data sourced from ClinicalTrials.gov, a service of the U.S. National Institutes of Health.

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