How is acute kidney injury (AKI) prevented?

Updated: Dec 24, 2020
  • Author: Biruh T Workeneh, MD, PhD, FASN; Chief Editor: Vecihi Batuman, MD, FASN  more...
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Answer

Remote ischemic preconditioning (RIPC) is a novel investigative method for preventing perioperative AKI. The rationale is that producing ischemia in a patient’s extremity immediately before surgery will stimulate the release of endogenous protective molecules, thereby reducing the likelihood that the surgery will precipitate AKI. [66]

In a randomized trial in 240 patients who were undergoing on-pump coronary bypass grafting and were at moderate to high risk for perioperative AKI, 37.5% of patients who received RIPC developed AKI within 72 hours after surgery, compared with 52.5% of controls (P = 0.02). In patients who developed AKI, 5.8% who had received RIPC required renal replacement therapy versus 15.8% of those in the control arm (10% absolute risk reduction). [66]

In this study, remote ischemia was induced by inflating a blood pressure cuff to 200 mm Hg on one upper extremity for 5 minutes; this was repeated twice, for a total of three cycles. Control patients received three cycles of blood pressure cuff inflation to 20 mm Hg for 5 minutes. [66]

Pharmacologic agents

A review of randomized, controlled trials of pharmacologic measures used to protect renal function perioperatively found no reliable evidence that any of the following interventions are effective [67] :

  • Dopamine and its analogues
  • Diuretics
  • Calcium channel blockers
  • Angiotensin-converting enzyme (ACE) inhibitors
  • N-acetylcysteine [68]
  • Atrial natriuretic peptide (ANP)
  • Sodium bicarbonate
  • Antioxidants
  • Erythropoietin (EPO)
  • Specific hydration fluids

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