Patent ID: 7938790
Filing Date: 2011-05-10
Classification: A61F,A61M

Abstract:
1. A device for application of substances to tissue, said device comprising: a porous pad; a seal adapted to cover a treatment surface of the tissue and the pad, and adapted to seal the treatment surface from the atmosphere; a supply line coupled to the pad and adapted to supply a substance to the treatment surface; a removal line coupled to the pad at a first end and adapted to remove the substance and to remove tissue fluids from the treatment surface, the removal line coupled to a vacuum source at the other end; wherein the supply line and the removal line are provided with respective controllable closure mechanisms; a controller coupled to the closure mechanisms, the controller being adapted to temporally control the respective closure mechanisms and to create a treatment dwell time interval between predefined openings and closings of the respective supply and removal lines; wherein sub-atmospheric pressure from the vacuum source is applied to the treatment surface to stimulate the tissue; wherein each of the closure mechanisms are closed during the treatment dwell time interval; wherein the closure mechanism of the supply line is adapted to open gradually to prevent a rapid influx of the substance; and wherein the closure mechanism of the removal line is adapted to open gradually to prevent a rapid pressure drop at the treatment surface.