Medical devices for blocking blood flow, preventing embolization reflux and for use in endovascular procedures; surgical bypass devices comprised of devices to block blood flow and prevent embolization reflux; medical implants, namely, devices to block blood flow and prevent embolization reflux; surgical implants, namely, devices to block blood flow and prevent embolization reflux; surgical implants for use in embolization procedures in peripheral vascular veins or arteries to stop or restric...