Use of slender catheters for transradial angiography and interventions

Area of Science:

• Interventional Cardiology
• Medical Device Technology
• Vascular Surgery

Background:

• Current coronary interventions commonly use 0.014-inch guidewires and 6-F or 7-F guiding catheters.
• Larger guiding catheters (6-F/7-F) are associated with increased punctured-site complications and potential radial artery occlusion.
• The transradial approach, while safer than transfemoral, can still lead to complications with larger catheters.

Purpose of the Study:

• To evaluate the efficacy and safety of the novel "Slender System" for complex coronary interventions.
• To assess the feasibility of using smaller diameter devices (0.010-inch guidewires, 5-F guiding catheters, 3-F angiography catheters) for bifurcation lesions and chronic total occlusions (CTO).
• To compare outcomes of the Slender System with traditional larger-bore systems.

Main Methods:

• Utilized a "Slender System" comprising 0.010-inch guidewires, 5-F guiding catheters, and 3-F angiography catheters.
• Performed Kissing Balloon Technique (KBT) with the Slender System for bifurcation lesions.
• Applied the Slender System for the treatment of chronic total occlusions (CTOs) via a transradial approach.
• Described angiography procedures using a 3-F catheter.

Main Results:

• The Slender System was used in 96% of transradial chronic total occlusion (CTO) cases.
• Successful treatment with the Slender System alone was achieved in 68% of CTO cases.
• The overall success rate for CTO treatment using the Slender System was 89%.

Conclusions:

• Complex lesions, including bifurcation lesions and CTOs, can be effectively treated using the Slender System.
• The Slender System demonstrates that not all complex coronary interventions necessitate larger guiding catheters (≥6-F), femoral approaches, or bilateral guiding catheters.
• This approach may reduce punctured-site complications and improve patient outcomes in interventional cardiology.