negative pressure

摘要

Topical negative pressure (TNP), or negative pressure wound therapy (NPWT), is a non-invasive technology comprising a negative pressure pump connected by a tube to a dressing that occupies a cavity wound. The dressing is sealed to the peri-wound skin using an adhesive film. This provides a closed system, so that negative (sub-atmospheric) pressure is generated at the wound/ dressing interface.NPWT is suitable for acute, chronic and traumatic wounds, as an adjunct to surgery and for salvage procedures such as wound dehiscence. Currently, four types of NPWT are available: Chariker-Jeter, Kremlin techniques, Miller technique and Vacuum Assisted Closure (V.A.C). No significant advantage of one system over another has been identified.