The geko device from Firstkind Ltd has received FDA clearance and can now go to market. The electrical neuromuscular stimulator can be easily attached to the wearer's leg, just below the knee, and it will stimulate blood flow to help prevent dangerous issues such as deep vein thrombosis (DVT) caused by chronic venous insufficiency (CVI).
https://www.notebookcheck.net/Geko-neuromuscular-stimulator-that-can-prevent-blood-clots-gets-FDA-market-approval.588196.0.html