New technology: Use low-frequency ultrasound to break blood clots deep in the leg veins
us researchers have developed a new surgical tool that uses low-frequency ultrasound to break blood clots deep in the leg veins without damaging the surrounding blood vessels.Why are human veins green while blood is red?
we all know that human blood is red, but the veins under the skin are green. it is due to the light reflection of the skin, the amount of oxygen in the blood and other factors.