[A new model of the sterno-thoracic retractor].

Vertical medial sternotomy is recognized as the best approach for heart surgery. We have modified the double valve Chevalier retractor (widely used since 1962 and adapted by others) to improve its performance. A new articulation on the retractor arms facilitates installation of extracorporeal circulation and epicardial electrodes without removing the device. The position of the rack-bar can also be modified to avoid cervical compression. In addition, the inferior aspect of the rack-bar has been covered with a plate to avoid catching the drapes.