主题：[学习]医学英语短文学习（第三期）

Drains
   Drains are sometimes placed during surgery to enhance the flow of drainage from the wound, thus promoting wound healing. A drain may also be used to help keep the operated area dry.
   The Penrose drain is an example of such a drain. The Penrose is a soft latex rubber tubing material. One end is placed in the bottom of the wound and the other opens to the outside of the body, either through the wound itself or through a small surgical "stab" wound (a small puncture wound made by the surgeon) beside a larger wound. A sterile safety pin is attached to the Penrose drain to prevent it from sliding down into the wound.
   If a considerable amount of drainage is expected postoperatively, a closed wound suction device is placed at surgery. This portable system consists of a drainage tube with multiple openings that is attached to a vacuum unit that gently suctions fluid from the wound.
  Other brands have a different shape, such as a small plastic bottle, but operate on the same principle of low suction. These closed wound suction devices are commonly used after breast, hip, or perineal surgery, help keep the wound dry, and are easily moved when the patient moves.
   Rarely, a large, rigid plastic drainage tube is placed into a wound and attached to a connection tube that is connected to the wall suction device. This is done when a very large volume of drainage is expected.
drain引流
drainage引流物
Penrose drain（指烟卷引流）
latex胶乳
safety pin别针
perineal会阴的