Biosense Webster MobiCath Bi-Directional Guiding Sheath. Small Curve catalog no. D140010, Large Curve catalog no. D140011. The MobiCath Bi-Directional Guiding Sheath is a flexible tipped percutaneous catheter introducer (or guiding sheath) designed for gaining access to the coronary systems. The device features adjustable tip geometry through use of a rotating handle to deflect the catheter. This catheter is assembled with a hemostasis valve and a sideport infusion line. || The MobiCath Bi-Directional Guiding Sheath is intended for introducing various cardiovascular catheters into the heart. Including the left side of the heart through the interatrial septum.