How can you make it back to the lungs without help? Fortunately, veins have tiny valves within them that allow blood to flow in only one direction. When muscles contract near larger veins, they pump ...

David Ku, Regents' Professor in mechanical engineering at Georgia Tech, squeezes the prosthetic vein valve to the open position. The valve is designed to replace damaged, nonfunctioning valves.

Innoventric's Trillium, now in clinical trials, is implanted in a 10-minute procedure under sedation to treat a leak in the ...

This causes inflammation, stretching and weakening of the venous walls, stagnation of blood, and impairment of the venous valves. Situations increasing the chances of developing varicose veins are ...

For example, a capillary is microscopically thin to allow gases to exchange, the arteries are tough and flexible to cope with high pressure blood flow and the veins contain valves to prevent the ...

“Venous insufficiency” means that the veins aren’t working adequately, usually because the valves that prevent backward flow have failed. So, the pressure in the vein is higher than it ought ...