Negative pressure fluid absorbent system and a feedback control method for the same

摘要

A negative pressure wound therapy system creates a negative pressure environment in the opening 511 of a wound-dressing unit 50 and a positive pressure environment in a collecting bag 40. Then a positive pressure detecting procedure is proceeded in the positive pressure environment and a negative pressure detecting procedure is proceeded in the negative pressure environment. The detected results are sent to a controller 10 to determine whether a micropump 30 should be stopped or kept running. There may be a test mode prior to the operating mode (see figure 7). The fluid connections between the various components of the system may be detachable. There may be a check valve to prevent backflow from the container, and filters to prevent microbes from entering the sensors.