Fig. 4.
A 30 to 60 degree distal bend 1 to 2 mm from the tip should be placed on the wire for controlled drilling or penetration. Reentry into the true lumen requires a high penetration force wire with a more acute bend. Reproduced with permission from Thach N et al. Practical Handbook of Advanced Interventional Cardiology: Tips and Tricks, 4th Edition Wiley and Sons [49].