Wound Dressing containing a vacuum pump
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[0031]These and other objects, advantages, and novel features of the present invention will become apparent when considered with the teachings contained in the detailed disclosure along with the accompanying drawings.
DESCRIPTION OF THE INVENTION
[0032]The present invention is a negative pressure wound therapy (NPWT) system where the reduced atmospheric pressure on the wound is achieved by two sources, (1) a porous sponge dressing material and (2) an auxiliary vacuum unit, e.g. a pump. The porous sponge dressing material is a PVA foam which provides a natural capillary pressure of about −20 mmHg to about −72 mmHg on the wound. The auxiliary pump can further reduce the pressure to maintain a therapeutic benefit, e.g. down to about −120 mmHg. The result is a NPWT system that is portable by the user and is significantly smaller than prior art devices and with minimal to no tubing required to connect the dressing to the auxiliary vacuum source.
[0033]As is used herein, reduced or negative ...
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