口腔颌面外科大型手术切除后的创面常需负压引流，以利创面的积液及时引出，使创面紧密贴合，达到一期愈合的效果．负压引流的装置及方法有以下几种：1．现成的引流器现成的已消毒的负压引流器，一般常应用于手术后包扎创D时接上现成的引流器，可达一定的引流目的，但此种引流 Oral and maxillofacial surgery large surgical resection of the wound often require negative pressure drainage, in order to facilitate timely discharge of the wound effusion, the wound close fit, to achieve a healing effect. Negative pressure drainage devices and methods are the following: 1. Off-the-shelf ready-made disinfection of the negative pressure drainage device, usually used in dressing after surgery when the dressing D ready-made drain connected up to a certain degree of drainage purposes, but such drainage