Devices that employ external compression stocking-type garments in the
treatment of edema, chronic wounds, deep venous thrombosis prevention or
claudication all share a number of significant limitations. These include
the frequent need for custom fitting to assure an appropriate fit,
vigilant maintenance to assure a continued "good fit," limited compliance
with proper use by patients and difficulty of application. There is a
large body of evidence demonstrating that patients often decline to wear
the compressive stockings as prescribed or in the form that would be most
beneficial because they find these devices to be difficult to put on and
take off. Building on the limitations of existing therapies, and
distilled lessons learned from the field of prosthetics and wound
healing, the present invention employs vacuum-assisted negative pressure
to provide compression and help pump fluid from the tissues of affected
limbs. The device is embodied in the form of a flexible stocking-like
garment that will utilize a pumping mechanism to generate negative
pressure around the limb and thus create vacuum compression that will
mobilize fluid in a limb and increase venous return to the heart. Through
the use of a circumferential wrap, the present invention provides a major
advance in both the distribution of vacuum and the securing of the device
over the limb.