Hydrophilic-coated sheaths increase the success rate of transradial coronary procedures and reduce patient discomfort but do not reduce the occlusion rate: randomized single-blind comparison of coated vs. non-coated sheaths.

Objectives To examine the effect of hydrophilic-coated Vs. non-coated sheaths for coronary angiography by transradial access and to determine whether the rate of post-procedural vascular occlusion can be reduced if different sheath diameters are used in accordance with vessel diameters.