RenalGuard System and Contrast Media (REMEDIALII)
The purpose of the present study is to assess the role of the RenalGuard System as compared to the optimal strategy (sodium bicarbonate infusion plus N-acetylcysteine (NAC)) in high and very-high risk patients to prevent contrast-induced acute kidney injury contrast induced acute kidney injury (CI-AKI).
Consecutive patients with chronic kidney disease, referred to our institutions for coronary and/or peripheral procedures, will be randomly assigned to 1) prophylactic administration of sodium bicarbonate plus NAC (Systemic alone therapy group; n > 133) and 2) RenalGuard System treatment (RenalGuard group; n > 133). All enrolled patients must have an estimated glomerular filtration rate <30 ml/min/1.73 m2 and/or a contrast nephropathy risk score ≥11). In all cases iodixanol (an iso-osmolar, non ionic contrast agent) will be administered. The primary end point is an increase of >=0.3 mg/dL in the creatinine concentration 48 hours after the procedure.
This study will give important answers on how to prevent CI-AKI in high and very-high risk patients undergoing contrast media exposure.
Chronic Kidney Disease
Device: RenalGuard system
Drug: Systemic alone therapy
|Study Design:||Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: No masking
Primary Purpose: Prevention
|Official Title:||Renal Insufficiency Following Contrast Media Administration Trial II (Remedial II): The RenalGuard System in High-Risk Patients for Contrast-Induced Acute Kidney Injury|
- Number of Participants With Contrast-induced Acute Kidney Injury [ Time Frame: at 48 hours following contrast exposure ]The primary outcome measure will be the rate of development of CI-AKI in the 2 study arms (number of participants). CI-AKI is defined as an increase in the serum creatinine concentration >=0.3 mg/dL from the baseline value at 48 hours after administration of the contrast media or the need for dialysis.
- Rate of Kidney Injury and Major Adverse Events [ Time Frame: 7 days ]an increase in the serum creatinine concentration >=0.25% and >=0.5 mg/dl at 48 hours after contrast exposure
- Changes in the Serum Cystatin C Concentration at 24 and 48 Hours After Contrast Exposure [ Time Frame: 7 days ]Cystatin C is an alternative biomarker of kidney damage. Cystatin C seems to be superior to serum creatinine an identifying kidney function and damage.
- Changes in the Urine and Serum NGAL Concentration After Contrast Exposure [ Time Frame: 7 days ]NGAL is a new biomarker which seems to be very promising in detecting kidney injury. prelimiary data suggest that urine and serum NGAL increase very early (within few horurs) after the occurrence og acute kidney damage. Therefore, NGAL may be a real marker of acute kidney injury.
- the Rate of Acute Renal Failure Requiring Dialysis [ Time Frame: 1 month ]occurrence of renal failure requiring dialysis represents the haard endpoint of the study. Actually this represents the worst clinical consequence of CI-AKI.
- The Rate of In-hospital Major Adverse Events (i.e. Acute Myocardial Infarction, c) Renal Failure Requiring Dialysis, and d) Acute Pulmonary Edema) [ Time Frame: 1 month ]Assessment of the rate of in-hospital major adverse events (i.e. acute myocardial infarction, c) renal failure requiring dialysis, and d) acute pulmonary edema) will give important informantion on the clinical relevance of prophylactic strategies in preventing CI-AKI
- The Cost-effectiveness Ratio. [ Time Frame: 1 month ]Assessement of the cost-effectiveness ratio is important when testing a new strategy of both therapy and prophylaxis. The Renalguard system is more expensive than the conventional hydration regimen. The cost of RenalGuard system is approximately 800 $. This cost will be justified only if the system is more effective in preventing CI-AKI and improving the clinical outcome, expecially reducing the lenght of ospedalization and the rate of dialysis.
|Study Start Date:||January 2009|
|Study Completion Date:||December 2011|
|Primary Completion Date:||December 2010 (Final data collection date for primary outcome measure)|
Active Comparator: Systemic alone therapy group
Systemic alone therapy group will be treated by intravenous sodium bicarbonate plus NAC administration. Patients allocated to the Systemic alone therapy group will receive 154 mEq/l of sodium bicarbonate in dextrose and H2O, according to the protocol reported by Merten et al. (9) The initial i.v. bolus was 3 ml/kg per hour for 1 hour immediately before contrast injection. Following this, patients will receive the same fluid at a rate of 1 ml/kg per hour during contrast exposure and for 6 hours after the procedure. All patients will receive NAC (Fluimucil, Zambon Group SpA, Milan, Italy) orally at a dose of 1200 mg twice daily on the day before and on the day of administration of the contrast agent (total of 2 days. Additional NAC dose (1.2 g) will be administered i.v. during the procedure.
Drug: Systemic alone therapy
Patients allocated to the Systemic alone therapy group will receive 154 mEq/l of sodium bicarbonate in dextrose and H2O, according to the protocol reported by Merten et al. The initial intravenous bolus was 3 ml/kg per hour for 1 hour immediately before contrast injection. Following this, patients will receive the same fluid at a rate of 1 ml/kg per hour during contrast exposure and for 6 hours after the procedure. All patients will receive NAC (Fluimucil, Zambon Group SpA, Milan, Italy) orally at a dose of 1200 mg twice daily on the day before and on the day of administration of the contrast agent (total of 2 days)
Other Name: Sodium Bicarbonate and N-acetylcysteine
Experimental: RenalGuard System group
Prophylactic controlled hydration with saline (0.9%) plus N-acetylcystein (NAC; 6 g in total). In the RenalGuard group, an initial bolus (priming) of 250 ml will be administered. In case of left ventricular dysfunction (ejection fraction ≤30%) and/or unstable hemodynamic conditions the bolus will be reduced to 150 ml. Following the initial bolus, furosemide (0.25 mg/kg) will be administered in order to achieve the optimal urine flow (≥300 ml/h). The hydration will be continued throughout the duration of the procedure and will last 4 hours following the procedure. Additional doses of furosemide are allowed in case of decrease of urine flow <300 ml/h.
Device: RenalGuard system
The RenalGuard™ System (PLC Medical Systems, Inc.) is a real-time measurement and real time matched fluid replacement device designed to accommodate the RenalGuard Therapy. The RenalGuard Therapy is based on the concept demonstrated by clinical data that high urine output is beneficial to patients with impaired baseline renal function who receive intravascular iodinated contrast medio (CM). The RenalGuard System seems to be ideal for the prevention of CI-AKI, by allowing an optimal urine flow rate >300 ml/h. It is known that excessive diuresis can cause dehydration which increases the risk to the kidneys from CM. The RenalGuard System should allow the patient to achieve high urine output safely by maintaining the intravascular blood volume and avoiding the risk of over-or-under-hydration.
Please refer to this study by its ClinicalTrials.gov identifier: NCT01098032
|Unversity of Ferrara, Department of Cardiology|
|Unversity School of Medicine of Modena, Deparment of Cardiology|
|Naples, Italy, 80121|
|Principal Investigator:||Carlo Briguori, MD, PhD||Clinica Mediterranea, Naples,. ITALY|