Objective: To examine the incidence of hemorrhagic complications in patients undergoing radial cardiac catheterization and using a hemostatic device for arterial compression. Method: A prospective cohort study conducted with patients undergoing elective cardiac catheterization in two hemodynamic laboratories in southern Brazil. The TR Band® radial compression device was used during 4 hours for hemostasis of the arterial puncture site. Hematomas and minor bleeding were the outcomes evaluated. Results: A total of 244 patients were evaluated. The mean age was 63.5±10.9 years, 61.9% were male, 73.8% had systemic arterial hypertension (SAH) and 42.8% were dyslipidemic. Type I hematoma occurred in 1.2% of patients and minor bleeding in 9% after removal of the device. There was no significant association between hematomas and bleeding, and patients who used oral anticoagulants (p=0.604) and prior use of antiplatelets (p=0.958). Conclusion: The use of the hemostatic device for radial artery compression was safe in clinical practice and there was a low incidence of hematomas and minor bleeding after radial coronary angiography.How to cite this article: Córdova ESM, Santos LR, Toebe D, Moraes MAP, Souza EN. Incidence of hemorrhagic complications with use of a radial compression device: a cohort study. Rev Esc Enferm USP. 2018;52:e03410.