Deep vein thrombosis: Pulsating plaster stuck to the back of the knee to beat killer blood clots

Pulsating plaster stuck to the back of the knee to beat killer blood clots | UPDATED: 01:23 GMT, 18 December 2012 A high-tech plaster that’s stuck to the back of the knee could lower the risk of deep vein thrombosis (DVT) or blood clots in the leg following surgery.