为了适应心脏外科手术的需要，我们研制了一种专为冠状动脉搭桥术而设计的辅助器械——特种胸骨牵开器。目前心胸外科手术用的胸骨牵开器，一般包括齿条、活动臂和固定臂。活动臂和固定臂上分别带有扒手。使用时摇动活动臂上的手柄，活动臂沿齿条运动，两臂上的扒手沿水平面扒 In order to meet the needs of cardiac surgery, we have developed an auxiliary device specifically designed for coronary artery bypass grafting - a special sternotomy retractor. At present, the sternal retractor for cardiothoracic surgery generally includes a rack, a movable arm, and a fixed arm. There are grippers on the movable arm and the fixed arm, respectively. Shake the handle on the movable arm when using, the movable arm moves along the rack and the picks on both arms move along the horizontal plane.