The Prevena™ IMS is a small portable device, which consists of a mild vacuum unit that delivers negative pressure and a dressing that is intended for use over closed incisions after surgery. It is used for a minimum of 4 days up to a maximum of 7 days. This system is commercially available and has a CE mark, which means that it is approved for the use on the European market. It is intended to be applied immediately post sternotomy surgery on a closed clean incision.