CTO EXAM STUDY GUIDE

Traditional CTO modalities - Answer-.035 stiff guidewires .014 extra support coronary wires Crossing support catheters Subintimal Navigation and Implications - Answer-*Poor long term outcomes *Perforation, Dissection, Loss of Collaterals *Accelerated intimal hyperplasia Collateral Compromise - Answer-Up to 47% loss distally and 26% loss proximally Extension of Treatment Site - Answer-Due to inability to re-access the lumen at the exact site of the distal end of the lesion. Intravascular Ultrasound (IVUS) - Answer-Can help differentiate 4 types of plaque. Fibrous, Fibro-fatty, Necrotic, dense calcium Re-Entry Devices - Answer-*Boston Scientific - Off Road *Cordis - LTD Outback *Volcano Pioneer *All non-reimbursable Crossing Cather Market Overview - Answer-*.014, .018, .035 wire configurations *65, 90, 135, 150 cm lengths * 69% of market is .035 catheters * Quick Cross .035 x 135cm & 150cm hold highest sales respectively Seeker Specs - Answer-* .014, .018, .035 wire compatibility * 65, 90, 135, 150 * Radiopaque marking system * Hydrophylic coating on distal 40 cm * Power Injection at 300 psi * Ergonomic hub with imprinted catheter sizing Seeker Radiopaque Markers - Answer-* 30 cm total measurement capability * Tungsten loaded segments * 1mm embedded platinum RO band (5-6 mm from tip) * Distal tip = .5 cm * Double lines denote 10 cm markers Seeker Tip Entry Profiles - Answer-* .035 = .038 * .018