About this trial
Acute kidney injury is a well-recognized complication in critically ill patients. Up to date there is no clinically established method to reduce the incidence or the severity of acute kidney injury.
Remote ischemic preconditioning (RIPC) will be induced by three cycles of upper limb ischemia.
The aim of the study is to reduce the incidence of AKI by implementing remote ischemic preconditioning (identified by the urinary biomarkers tissue inhibitor of metalloproteinases-2 (TIMP-2) and insulin-like growth factor-binding protein 7(IGFBP7)
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Adult patients (age ≥18 years)
Critically ill patients with sepsis < 12 hours
Invasive ventilation for at least 24 hours (propofol-free-sedation) and/or vasopressor therapy
Unrestricted intensive care for at least 72 hours
Disqualifiers
Pre-existing AKI
(Glomerulo-)nephritis, interstitial nephritis, vasculitis
Chronic kidney disease with estimated glomerular filtration rate (eGFR) < 30 ml/min/1.73m²
Chronic dialysis dependency
Trial design
Parallel
Treatments tested in this trial
Remote ischemic preconditioning (RIPC)
Procedure/Surgery3 cycles of 5 min inflation of a blood-pressure cuff to 200 millimetres of mercury (mmHG) (or at least to a pressure 50 mmHG higher than the systolic arterial pressure) to one upper arm followed by 5 min reperfusion with the cuff deflated. In Non-Responder two additional cycles of 10 min cuff inflation will be performed.
Sham RIPC
Procedure/Surgery3 cycles of 5 min inflation of a blood-pressure cuff to 20 mmHG to one upper arm followed by 5 min reperfusion with the cuff deflated. In Non-Responder two additional cycles of 10 min cuff inflation will be performed
Treatment groups
Trial outcomes
Primary outcomes
1. kidney damage after cardiac surgery identified by the difference between [TIMP-2]*[IGFBP7] levels 24h after randomization and [TIMP-2]*[IGFBP7] levels at randomization
Secondary outcomes
Incidence of Acute Kidney Injury (AKI) according to the Kidney Disease: Improving Global Outcomes (KDIGO) criteria
Severity of AKI
The severity for AKI is classified according to the KDIGO criteria
Need for renal replacement therapy
Number of patients with renal replacement therapy
Recovery of kidney function
defined as complete recovery: serum-creatinine ≤0.5 mg/dl higher than baseline; partial recovery: serum creatinine \>0.5 mg/dl higher than baseline but no dialysis-dependence; non-recovery: patients who remained dialysis-dependent
Other outcomes
Add-on Study (Analysis of further proteins)
Sponsors and contacts
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