This trial is designed as a prospective, multi-center, randomized, double blinded clinical trial to evaluate the safety and efficacy of the Thrombin VSI. An immunological sub-study to assess antibody and coagulation changes in the subjects following exposure to the Vascular Solutions Diagnostic Duett Pro manufactured with Thrombin VSI and Thrombin JMI will be conducted as a component of this trial with a subset of the enrolled study subjects.