A curved and tortuous coronary artery which is proximal to the CTO can also be straightened using a microcatheter and it can increase the guidewire torque.
The CrossBoss Catheter facilitates the placement and support of a guidewire into discrete regions of the coronary and peripheral vasculature through its central guidewire lumen. This device contains a rounded distal tip (1 mm diameter) mounted to a flexible and torquable proximal shaft. The CrossBoss Catheter is packaged with a dedicated torque device positioned at its proximal end. The distal end of the catheter is hydrophilic coated. It is compatible with 6F guide catheters with minimum inner diameter of 0.070 in (1.7 mm), and may be used with guidewires. All components of the CrossBoss Catheter are provided sterile and non-pyrogenic.