By PAT HAGAN FOR THE DAILY MAIL PUBLISHED: 20:11 EST, 18 January 2021 | UPDATED: 02:22 EST, 19 January 2021 A tiny balloon that clears blocked blood vessels could banish impotence. The deflated silicone balloon, no bigger than a grain of rice, is placed on the end of a hollow plastic tube and inserted through the skin into the lower abdomen....