Ex-vivo results using a new pullback atherectomy catheter (PAC).

Area of Science:

• Vascular Surgery
• Interventional Cardiology
• Biomedical Engineering

Background:

• Atheromatous plaque buildup in superficial femoral arteries causes significant disease.
• Current atherectomy methods face challenges in effectively removing extensive plaque.
• Novel devices are needed to improve treatment outcomes for peripheral artery disease.

Purpose of the Study:

• To assess the feasibility of a novel retrograde cutting atherectomy catheter for definitive atheromatous plaque removal.
• To evaluate the efficacy of the Pullback Atherectomy Catheter in severely diseased cadaveric superficial femoral arteries.

Main Methods:

• Retrograde atherectomy using sequentially larger Pullback Atherectomy Catheters (2.5 mm, 3.0 mm, 3.5 mm) was performed on 13 cadaveric superficial femoral arteries.
• Experiments utilized either mounted tissue (n=10) or in situ specimens (n=3).
• Outcomes were assessed via angiography and light microscopy.

Main Results:

• The procedure was tested on arteries with an average pre-atherectomy stenosis of 95%.
• Post-atherectomy, the mean stenosis was reduced to 21%.
• One instance of vessel perforation occurred during the 13 experiments.

Conclusions:

• Retrograde atherectomy using the Pullback Atherectomy Catheter demonstrates feasibility for definitive plaque removal in preclinical settings.
• Further research is required to determine the clinical utility of this novel retrograde atherectomy device.
• This study provides a foundation for future investigations into retrograde atherectomy for peripheral artery disease treatment.