A surgical drain system includes a drain tube and an obturator configured for insertion in a wound. The obturator can be either solid or hollow, and be positioned inside the drain tube. Alternatively, the obturator can surround the drain tube. The obturator can prevent or limit penetration of a needle through the drain tube as the wound is closed around the drain tube with a suture. In addition, the obturator provides a support that holds the shape of the drain tube during wound closure so that the drain tube is not deformed or crimped by the suture. The obturator can include one or more cutting elements for severing sutures that pierce the drain tube. The one or more cutting elements can also sever or loosen sutures that constrict or otherwise impinge upon the drain tube.