US Patent 10973693 Negative pressure wound therapy apparatus and methods

A device and method for treating a wound of a patient with negative pressure is provided. The device comprises a pump chamber that has at least one moveable side of the chamber. The moveable side moves between an intake stroke and an exhaust stroke upon application of an electrical potential. Fluid is drawn into the pump chamber during the intake stroke and expelled from the pump chamber during the exhaust stroke. The pump system may have a magnetic or a piezoelectric element that drives the movement of the pump chamber side.