Pulsating pressure chamber in a prosthetic limb

An apparatus and method for providing positive and negative pressure to a portion of a body for the purpose of improving blood flow in that portion of the body. The apparatus including a pressure chamber configured to generally conform to and surround a portion of the body, with the chamber adapted to receive the portion of the body within an opening in the chamber. The chamber also including a flexible liner adapted to surround the portion. The liner is configured to extend beyond the chamber when the portion covered by the liner is placed within the chamber with the chamber sealing to the liner. Additionally including a pressure control device having sources of positive and negative pressure. The device being operably connected to the chamber to provide positive and negative pressure to the portion within the chamber in a predetermined, controlled manner. A pressure patch is also described.