The pilot study will provide supporting clinical data for an IDE application to FDA for approval to conduct a Pivotal Study of the safety and effectiveness of APG for the treatment of chronic venous stasis ulcers. The study will evaluate the hypothesis that treatment of a chronic venous ulcer with APG prepared from Autologous Platelet Concentrate (APC+) (and the associated autologous growth factors) and Topical Thrombin (TT) has the potential to accelerate the re-epithelialization process. Harvest Technologies will submit a marketing application to FDA to expand the labeling of the SmartPReP2® Platelet Concentrate System, including its accessory kits, with the specific indication to produce APC for the purpose of promoting healing of chronic venous ulcers of the lower extremity.