| 摘要 |
The retractor (1) is of the autostatic type and comprises a retractor polygonal frame (2) associated with a plurality of dilators (4) which when inserted deeply into the patient's body maintain the edges of the incision open and the viscera of the effective operation area suitably withdrawn. The sides (5) of the the frame (2) are hingedly connected to each other and two opposite hinges have their axes converging to a point located at the side of the frame (2) opposite to the dilators (4), so that the latter are spreaded out at their free ends to a greater degree that at the ends fastened to the frame (2). |
