Fig. 2From: Investigating the efficacy of vacuum sealing drainage versus traditional negative pressure drainage in treating deep incision infections following posterior cervical internal fixation—a retrospective cohort studySchematic Diagram of common negative pressure drainage tube in TND group. A, B Overview of the common negative pressure drainage tubes used in the TND group is presented; C visual of the beginning of a siphon drainage tube; D appearance of the negative pressure drainage ballBack to article page