Elevated vacuum is a term that describes a particular style suspension utilized in transtibial (below the knee) and transfemoral (above the knee) prosthetic sockets. An electric or mechanical pump is attached to the socket and provides a constant, monitored suction; pulling the liner and the patient's residual limb towards the inner socket walls. This vacuum prevents excessive motion within the socket which leads to unwanted friction and shear forces from occurring. Circulation is improved thus providing a healthier residuum. A silicone liner interface with a sleeve suspension is used in conjunction with the pump to complete the elevated vacuum system.
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