Prevena Incision Management

Inclusion Criteria: * Eligible patients are those who require isolated coronary artery bypass surgery, who need at least 2 bypass grafts, and who are deemed suitable by the operating surgeon to have both right and left internal mammary arteries harvested as conduits Exclusion Criteria: * Require additional procedures in addition to the coronary bypass or need for internal mammary artery harvest for feasibility study * Who are deemed by the operating surgeon as unsuitable for bilateral internal mammary artery harvest because of * Age (75 or older where prognostic benefit of using both internal mammary arteries has been questioned), * Obesity with a BMI which is higher than 35 (increased risks of wound infection) * Diabetes (of any type) (increased risks of infection.)