Remote Ischemic Preconditioning and Contrast-Induced Nephropathy: A Systematic Review

Area of Science:

• Nephrology
• Cardiology
• Radiology

Background:

• Contrast medium (CM) administration in imaging can lead to contrast-induced nephropathy (CIN).
• CIN is a significant cause of renal insufficiency, with incidence varying by patient risk factors.
• Current preventative methods like hyperhydration have limited evidence.

Purpose of the Study:

• To systematically review randomized clinical studies on remote ischemic preconditioning (RIPC) for CIN prevention in humans.
• To evaluate the efficacy of RIPC as a protective strategy against CIN.

Main Methods:

• Systematic review of randomized clinical trials (RCTs) published up to June 2015.
• Studies focused on RIPC interventions for preventing CIN in human subjects.
• Risk stratification for CIN was often based on the Mehran score.

Main Results:

• Five studies were included in the analysis.
• In a high-risk population, RIPC significantly reduced CIN incidence (12% vs. 40%, P=0.002).
• Other studies showed reduced CIN incidence or biomarkers of renal impairment in RIPC groups, particularly in lower-risk populations.

Conclusions:

• Remote ischemic preconditioning (RIPC) is a promising, noninvasive, low-cost, and safe method for CIN prevention.
• The findings suggest RIPC's potential benefit across different risk groups.
• Further randomized controlled trials are necessary to confirm these preliminary results and establish RIPC as a standard preventative measure.