Tip Detection Method Using the New IVUS Facilitates the 3-Dimensional Wiring Technique for CTO Intervention

Area of Science:

• Cardiovascular Interventions
• Medical Imaging Technology
• Interventional Cardiology

Background:

• Chronic total occlusion (CTO) percutaneous coronary intervention (PCI) presents unique challenges in guidewire navigation.
• Intravascular ultrasound (IVUS)-based 3-dimensional (3D) wiring aims to improve guidewire accuracy in complex coronary lesions.
• The development of specialized IVUS systems, like the AnteOwl IVUS (AO-IVUS), is crucial for advancing CTO PCI techniques.

Observation:

• A novel CTO-specific IVUS system (AO-IVUS) was evaluated for its efficacy in 3D wiring within a coronary artery model.
• The study compared the AO-IVUS system with a previous iteration (Navifocus WR IVUS [Navi-IVUS]) using a beating heart model with a simulated CTO lesion.
• Key metrics assessed included guidewire crossing time and the number of punctures required to reach the target microcatheter.

Findings:

• AO-IVUS-based 3D wiring demonstrated a statistically significant reduction in guidewire crossing time compared to Navi-IVUS (80.5 s vs. 333.0 s, p=0.036).
• The number of punctures was also significantly reduced with the AO-IVUS system (1.0 vs. 24.0, p=0.001).
• The tip detection method, facilitated by the AO-IVUS system, proved effective for IVUS-based 3D wiring.

Implications:

• The AO-IVUS system, coupled with the tip detection method, offers a more efficient and precise approach to CTO PCI.
• This technology has the potential to simplify complex guidewire manipulations in clinical practice.
• Improved guidewire navigation in CTO PCI can lead to better procedural outcomes and patient safety.