Protected renal stenting with the PercuSurge GuardWire device: a pilot study

Area of Science:

• Interventional Cardiology
• Vascular Surgery
• Nephrology

Background:

• Atherosclerotic renal artery stenosis is a significant cause of secondary hypertension and renal insufficiency.
• Intraprocedural atheroembolism is a known complication of renal artery interventions.
• Distal protection devices aim to mitigate embolic events during endovascular procedures.

Purpose of the Study:

• To assess the feasibility and safety of renal artery angioplasty and stenting using a distal protection device.
• To evaluate the efficacy of this technique in reducing intraprocedural atheroembolism.
• To monitor the impact on blood pressure and renal function.

Main Methods:

• A cohort of 28 hypertensive patients with atherosclerotic renal artery stenosis underwent angioplasty and stenting with a GuardWire temporary occlusion balloon for distal protection.
• Aspiration and analysis of generated debris were performed.
• Blood pressure and serum creatinine levels were monitored pre- and post-procedure and during follow-up.

Main Results:

• 100% technical success rate was achieved in all 32 treated renal arteries.
• Visible embolic debris was aspirated in all patients, with quantifiable particle numbers and sizes.
• Mean blood pressure significantly decreased post-procedure, and serum creatinine levels showed a trend towards improvement or stabilization at 6-month follow-up.

Conclusions:

• Distal balloon occlusion during renal interventions is a feasible and safe method to protect against atheroembolism.
• The technique demonstrated potential benefits in blood pressure control and renal function preservation.
• Further evaluation through randomized controlled trials is warranted to confirm these preliminary findings.