Acute Renal Failure
Conditions
Keywords
cardiac surgery, fenoldopam, ketanserin, renal replacement therapy
Brief summary
The purpose of the study is to compare the effect of fenoldopam and ketanserin on kidney function preservation in patients at high risk for renal failure after cardiac surgery. Acute, oliguric renal failure develops in up to 2% of patients undergoing cardiac surgery. Some of them require renal replacement therapy and despite that mortality in this group exceeds 30-60%. The investigators await that the use of fenoldopam and/or ketanserin may decrease the rate of severe renal failure.
Detailed description
Informed, signed consent will be obtained from the patient before surgery. In patients with acute consciousness disorders, the consent will be obtained from a legal representative and confirmed by the local court - accordingly to Polish legacy. Patients willing to participate into the study and fulfilling at least one of two inclusion criteria will be randomly assigned to one of the three study groups. The treatment will be applied for 24 hours. Intention to treat analysis will include comparison for differences of continuous, homogeneous distributed data with use of parametric tests, parametric or inhomogeneous distributed data - with use of nonparametric tests. The treatment effect will be assessed by comparison of the odds ratios for primary and secondary outcomes between the groups.
Interventions
continuous intravenous infusion of 0.3 μg/kg/min fenoldopam for 24 hours
continuous intravenous infusion of 2 mL/hour of 0.9% natrium chloride solution for 24 hours
continuous intravenous infusion 0.1 mg/kg/hour ketanserin for 24 hours
Sponsors
Study design
Eligibility
Inclusion criteria
* cardiac surgery * at least one risk factor for acute renal failure: 1. oliguria \< 0.5 ml/kg/hour for over 3 hours despite adequate blood volume and furosemide intravenously 2. at least 60 mg furosemide/12 hours iv to maintain diuresis \> 1 ml/kg/hour
Exclusion criteria
* refused or none consent * chronic renal failure with chronic renal replacement therapy * chronic increase of serum creatinine \> 2 mg/dl
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| cystatin C and NGAL in serum | after 24 and 48 hours from treatment start |
Secondary
| Measure | Time frame |
|---|---|
| frequency of renal replacement therapy | 7 days after surgery |
| β2microglobulin in urine | after 24, 48 and 72 hours of treatment |
| creatinine increase in serum | after 24, 48 and 72 hours of treatment |
Countries
Poland